CN110636338A - Video definition switching method and device, electronic equipment and storage medium - Google Patents
Video definition switching method and device, electronic equipment and storage medium Download PDFInfo
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- H—ELECTRICITY
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- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/239—Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests
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Abstract
The application discloses a video definition switching method and device, electronic equipment and a storage medium, and relates to the field of cloud computing. The specific implementation scheme is as follows: receiving a sharpness switch request for a current sharpness media stream S1 at a current time; in response to the definition switching request, determining an expected switching point sample corresponding to the current moment in a pre-acquired sample information set of the current definition media stream S1; finding a key frame sample closest to the desired switch point sample in the current sharpness media stream S1; switching the current sharpness media stream S1 to a target sharpness media stream S2 based on a keyframe sample closest to the desired switch point sample. The embodiment of the application can effectively reduce the extra user flow consumption during definition switching, can use the definition switching to be smoother, and reduces the switching blockage in the aspect of performance.
Description
Technical Field
The application relates to the field of image processing, and further relates to the field of cloud computing, in particular to a video definition switching method and device, an electronic device and a storage medium.
Background
The seamless video definition switching technology is characterized in that obvious blocking and abnormal sound and image phenomena are not generated during video definition switching, and users can smoothly switch from one definition to other definitions without perception. The application of the technology can greatly improve the video watching experience of the user, and the technology is widely applied to the manual definition switching and definition self-adaptive scene switching of the user during media stream on-demand and live broadcasting.
The currently widely adopted implementation scheme of the video definition seamless switching technology comprises the following steps: 1) receiving a manual or automatic sharpness switching request while playing a current sharpness media stream S1; 2) the target definition media stream is opened S2, and the last key frame of the desired switch point is found S2 with the buffered location of S1 as the desired switch point. Since the decoding requirement starts from the key frame, the conventional scheme takes looking back one key frame as the media synchronization point of S2; 3) the decoder parameters are refreshed using the media stream information of S2, and frames repeated with the media stream of S1 are discarded at the time of video rendering to maintain continuous playback. The key points of this implementation are: (1) after opening S2, finding a key frame before the switching point; (2) due to the backward search operation in the step (1), repeated downloading and decoding of data with the length of at most one GOP exist, and repeated frames are discarded when rendering is needed. The above scheme of seamless handover with sharpness is mainly insufficient for the following points: (1) the extra traffic consumption is large. Backward searching, namely backward searching the position of the key frame, and repeatedly downloading the data of at most one GOP to consume the network flow of the user; (2) the resource occupation is large. Downloading, decoding and frame dropping of at most one GOP extra media data will burden the processor, and on a lower end model or will cause the display to be stuck; (3) if the data of a GOP is repeatedly downloaded or is caused to be stuck in the weak network environment, the goal of seamless switching cannot be achieved, and the switching point is expected to be at most one GOP away from the last key frame.
Disclosure of Invention
In view of this, embodiments of the present disclosure provide a method, an apparatus, an electronic device, and a storage medium for video sharpness switching, which can effectively reduce extra user traffic consumption during sharpness switching, make sharpness switching smoother, and reduce switching delay in performance.
In a first aspect, an embodiment of the present application provides a method for switching video sharpness, where the method includes:
receiving a sharpness switch request for a current sharpness media stream S1 at a current time;
in response to the definition switching request, determining an expected switching point sample corresponding to the current moment in a pre-acquired sample information set of the current definition media stream S1;
finding a key frame sample closest to the desired switch point sample in the current sharpness media stream S1;
switching the current sharpness media stream S1 to a target sharpness media stream S2 based on a keyframe sample closest to the desired switch point sample.
The above embodiment has the following advantages or beneficial effects: the present embodiment may switch the current sharpness media stream S1 to the target sharpness media stream S2 based on the target keyframe sample, which is the closest keyframe sample from the desired switch point sample. In the conventional video resolution switching method, the media stream buffering position of S1 is used as the desired switching point, and the last key frame of the desired switching point of S2 is found. Because the method and the device adopt the technical means of searching the key frame sample closest to the expected switching point sample in the current definition media stream S1 and switching the current definition media stream S1 to the target definition media stream S2 based on the key frame sample closest to the expected switching point sample, the technical problems of large extra flow consumption and more occupied resources in the prior art are solved, and the technical effects of effectively reducing extra user flow consumption during definition switching, enabling definition switching to be smoother and reducing switching blockage in the aspect of performance are achieved.
In the above embodiment, the determining a desired switching point sample corresponding to the current time in the pre-obtained sample information set of the current sharpness media stream S1 includes:
determining a playing position corresponding to the current moment in the pre-acquired sample information set of the current definition media stream S1;
and according to the playing position corresponding to the current moment and the size of a predetermined buffer area, determining an expected switching point sample corresponding to the current moment in the sample information set of the current definition media stream S1.
The above embodiment has the following advantages or beneficial effects: in this embodiment, a play position corresponding to the current time is determined in the sample information set of the current definition media stream S1, and then an expected switching point sample corresponding to the current time is determined according to the play position corresponding to the current time and the predetermined buffer size, so that the expected switching point sample corresponding to the current time can be accurately determined in the sample information set of the current definition media stream S1, and thus the keyframe sample from the expected switching point sample can be further determined.
In the above embodiment, the searching for the key frame sample closest to the desired switching point sample in the current sharpness media stream S1 includes:
determining that the expected switching point sample is close to the last key frame sample or close to the next key frame sample according to the position of the expected switching point sample and the positions of the last key frame sample and the next key frame sample of the current definition media stream S1;
if the sample of the expected switching sample is close to the last key frame sample, acquiring the last key frame sample in the sample information set of the current definition media stream S1, and taking the last key frame sample as a target key frame sample;
if the sample of the desired switch is close to the next key frame sample, the next key frame sample is obtained from the sample information set of the current definition media stream S1, and the next key frame sample is used as the target key frame sample.
The above embodiment has the following advantages or beneficial effects: the embodiment may determine whether the expected switching point sample is close to the previous key frame sample or the next key frame sample, and if the expected switching point sample is close to the previous key frame sample, the previous key frame sample is used as the target key frame sample; if the switch sample is expected to be close to the next key frame sample, the next key frame sample is taken as the target key frame sample, so that the target key frame sample can be accurately determined, and the current definition media stream S1 can be switched to the target definition media stream S2 based on the target key frame sample.
In the above embodiment, the determining that the desired switch point sample is close to the previous key frame sample or close to the next key frame sample according to the location of the desired switch point sample and the locations of the previous key frame sample and the next key frame sample of the current sharpness media stream S1 includes:
if t0< t1+ (t2-t1)/2, determining that the desired switch sample is substantially close to the last key frame sample;
if t0> t1+ (t2-t1)/2, determining that the desired switch sample is substantially close to the next key frame sample; wherein t0 represents the location of the desired switch point sample; t1 represents the position of the last key frame sample; t2 represents the location of the next key frame sample.
The above embodiment has the following advantages or beneficial effects: the embodiment can accurately determine whether the expected switching point sample is close to the previous key frame sample or the next key frame sample, and if t0< t1+ (t2-t1)/2, determine that the expected switching point sample is close to the previous key frame sample; if t0> t1+ (t2-t1)/2, it is determined that the desired switch sample is close to the next key frame sample, so that the target key frame sample can be accurately determined, and the current sharpness media stream S1 can be switched to the target sharpness media stream S2 based on the target key frame sample.
In the above embodiment, the sample information set of the current sharpness media stream S1 includes: sample type, whether it is a key frame, sample timestamp, sample index number.
The above embodiment has the following advantages or beneficial effects: in this embodiment, by pre-storing sample information such as a sample type, whether the sample information is a key frame, a sample timestamp, and a sample index number in the sample information set, a previous key frame sample and a next key frame sample of a desired switching point sample can be quickly found, so that whether the desired switching point sample is close to the previous key frame sample or the next key frame sample can be quickly determined.
In a second aspect, an embodiment of the present application further provides a video sharpness switching apparatus, where the apparatus includes:
the device comprises a receiving module, a determining module, a searching module and a switching module; wherein the content of the first and second substances,
the receiving module is configured to receive a definition switching request for a current definition media stream S1 at a current time;
the determining module is configured to determine, in response to the sharpness switching request, an expected switching point sample corresponding to the current time in a sample information set of the current sharpness media stream S1 that is obtained in advance;
the searching module is configured to search, in the current sharpness media stream S1, a keyframe sample closest to the desired switching point sample;
the switch module is configured to switch the current sharpness media stream S1 to a target sharpness media stream S2 based on a keyframe sample closest to the desired switch point sample.
In the foregoing embodiment, the determining module is specifically configured to determine, in the sample information set of the current sharpness media stream S1 acquired in advance, a playing position corresponding to the current time;
and according to the playing position corresponding to the current moment and the size of a predetermined buffer area, determining an expected switching point sample corresponding to the current moment in the sample information set of the current definition media stream S1.
In the above embodiment, the searching module includes: determining a submodule and an obtaining submodule; wherein the content of the first and second substances,
the determining submodule is configured to determine that the desired switching point sample is close to the previous key frame sample or close to the next key frame sample according to the position of the desired switching point sample, and the position of the previous key frame sample and the position of the next key frame sample of the current sharpness media stream S1;
the obtaining sub-module is configured to, if the sample of the expected switching sample is close to the previous key frame sample, obtain the previous key frame sample in the sample information set of the current sharpness media stream S1, and use the previous key frame sample as a target key frame sample; if the sample of the desired switch is close to the next key frame sample, the next key frame sample is obtained from the sample information set of the current definition media stream S1, and the next key frame sample is used as the target key frame sample.
In the foregoing embodiment, the determining submodule is specifically configured to determine that the expected switch sample is close to the last key frame sample if t0< t1+ (t2-t 1)/2; if t0> t1+ (t2-t1)/2, determining that the desired switch sample is substantially close to the next key frame sample; wherein t0 represents the location of the desired switch point sample; t1 represents the position of the last key frame sample; t2 represents the location of the next key frame sample.
In the above embodiment, the sample information set of the current sharpness media stream S1 includes: sample type, whether it is a key frame, sample timestamp, sample index number.
In a third aspect, an embodiment of the present application provides an electronic device, including:
one or more processors;
a memory for storing one or more programs,
when the one or more programs are executed by the one or more processors, the one or more processors implement the video sharpness switching method according to any embodiment of the present application.
In a fourth aspect, the present application provides a storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the video sharpness switching method according to any embodiment of the present application.
One embodiment in the above application has the following advantages or benefits: according to the video definition switching method, the video definition switching device, the electronic equipment and the storage medium, a definition switching request aiming at a current definition media stream S1 is received at the current moment; then, in response to the definition switching request, determining an expected switching point sample corresponding to the current moment in a pre-acquired sample information set of the current definition media stream S1; then searching a key frame sample closest to the expected switching point sample in the current definition media stream S1; finally, the current sharpness media stream S1 is switched to the target sharpness media stream S2 based on the keyframe sample closest to the desired switch point sample. That is, in the technical solution of the present application, the key frame sample closest to the desired switch point sample may be taken as a target key frame sample, and the current sharpness media stream S1 may be switched to the target sharpness media stream S2 based on the target key frame sample. In the conventional video resolution switching method, the media stream buffering position of S1 is used as the desired switching point, and the last key frame of the desired switching point of S2 is found. Because the technical means of searching the key frame sample closest to the expected switching point sample in the current definition media stream S1 and switching the current definition media stream S1 to the target definition media stream S2 based on the key frame sample closest to the expected switching point sample is adopted, the technical problems of large extra flow consumption and more occupied resources in the prior art are solved, and the technical effects of effectively reducing extra user flow consumption during definition switching, enabling definition switching to be smoother and reducing switching delay in performance are achieved; moreover, the technical scheme of the embodiment of the application is simple and convenient to implement, convenient to popularize and wide in application range.
Other effects of the above-described alternative will be described below with reference to specific embodiments.
Drawings
The drawings are included to provide a better understanding of the present solution and are not intended to limit the present application. Wherein:
fig. 1 is a schematic flowchart illustrating a video sharpness switching method according to an embodiment of the present application;
fig. 2 is a schematic flowchart of a video sharpness switching method according to a second embodiment of the present application;
FIG. 3 is a diagram of expected switch point samples close to the last key frame sample according to the second embodiment of the present application;
FIG. 4 is a schematic diagram of a sample expected to switch from being present near the next key frame sample provided in example two of the present application;
fig. 5 is a schematic structural diagram of a video sharpness switching apparatus according to a third embodiment of the present application;
fig. 6 is a schematic structural diagram of a lookup module provided in the third embodiment of the present application;
fig. 7 is a block diagram of an electronic device for implementing a video sharpness switching method according to an embodiment of the present application.
Detailed Description
The following description of the exemplary embodiments of the present application, taken in conjunction with the accompanying drawings, includes various details of the embodiments of the application for the understanding of the same, which are to be considered exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present application. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
Example one
Fig. 1 is a flowchart of a video definition switching method according to an embodiment of the present application, where the method may be executed by a video definition switching apparatus or an electronic device, where the apparatus or the electronic device may be implemented by software and/or hardware, and the apparatus or the electronic device may be integrated in any intelligent device with a network communication function. As shown in fig. 1, the video definition switching method may include the following steps:
s101, receiving a sharpness switch request for the current sharpness media stream S1 at the current time.
In particular embodiments of the present application, the electronic device may receive a sharpness switch request for the current sharpness media stream S1 at the current time. Specifically, the electronic device may receive a manually sent or automatically sent sharpness switch request while the current sharpness media stream S1 is playing.
And S102, responding to the definition switching request, and determining a desired switching point sample corresponding to the current moment in the pre-acquired sample information set of the current definition media stream S1.
In an embodiment of the present application, the electronic device may determine, in response to the sharpness switch request, a desired switch point sample corresponding to the current time in the pre-obtained sample information set of the current sharpness media stream S1. Specifically, the electronic device may first determine a playing position corresponding to the current time in a sample information set of the current definition media stream S1 obtained in advance; and then, according to the playing position corresponding to the current time and the predetermined size of the buffer area, an expected switching point sample corresponding to the current time is determined in the sample information set of the current definition media stream S1.
S103, finding the key frame sample closest to the desired switch point sample in the current sharpness media stream S1.
In particular embodiments of the present application, the electronic device may look for the key frame sample closest to the desired switch point sample in the current sharpness media stream S1. Specifically, the electronic device may determine that the desired switch point sample is close to the previous key frame sample or close to the next key frame sample according to the position of the desired switch point sample and the positions of the previous key frame sample and the next key frame sample of the current sharpness media stream S1; if the expected switching point sample is close to the previous key frame sample, the electronic device may obtain the previous key frame sample in the sample information set of the current definition media stream S1, and use the previous key frame sample as the target key frame sample; if the switch sample is expected to be close to the next key frame sample, the electronic device may obtain the next key frame sample in the sample information set of the current sharpness media stream S1, and use the next key frame sample as the target key frame sample.
S104, based on the key frame sample closest to the expected switch point sample, the current definition media stream S1 is switched to the target definition media stream S2.
In particular embodiments of the present application, the electronic device may switch the current definition media stream S1 to the target definition media stream S2 based on the keyframe sample closest to the desired switch point sample. Specifically, if the expected switching point sample is close to the previous key frame sample, the electronic device may obtain the previous key frame sample in the sample information set of the current definition media stream S1, use the previous key frame sample as the target key frame sample, use the timestamp of the previous key frame as the data start downloading point of the target definition media stream S2, and immediately download S2, where the extra consumption data in this case is smaller than T/2; if the switching sample is expected to be close to the next key frame sample, the electronic device may obtain the next key frame sample in the sample information set of the current definition media stream S1, use the next key frame sample as a target key frame sample, use a timestamp of the next key frame as a starting download point of the target definition media stream S2, and start the S2 media download when the S1 data is downloaded to t2, in this case, it is not necessary to download duplicate data of the media stream, and the extra traffic consumption is zero.
In the method for switching video definition provided in the embodiment of the application, a definition switching request for a current definition media stream S1 is received at a current time; then, in response to the definition switching request, determining an expected switching point sample corresponding to the current moment in a pre-acquired sample information set of the current definition media stream S1; then searching a key frame sample closest to the expected switching point sample in the current definition media stream S1; finally, the current sharpness media stream S1 is switched to the target sharpness media stream S2 based on the keyframe sample closest to the desired switch point sample. That is, in the technical solution of the present application, the key frame sample closest to the desired switch point sample may be taken as a target key frame sample, and the current sharpness media stream S1 may be switched to the target sharpness media stream S2 based on the target key frame sample. In the conventional video resolution switching method, the media stream buffering position of S1 is used as the desired switching point, and the last key frame of the desired switching point of S2 is found. Because the technical means of searching the key frame sample closest to the expected switching point sample in the current definition media stream S1 and switching the current definition media stream S1 to the target definition media stream S2 based on the key frame sample closest to the expected switching point sample is adopted, the technical problems of large extra flow consumption and more occupied resources in the prior art are solved, and the technical effects of effectively reducing extra user flow consumption during definition switching, enabling definition switching to be smoother and reducing switching delay in performance are achieved; moreover, the technical scheme of the embodiment of the application is simple and convenient to implement, convenient to popularize and wide in application range.
Example two
Fig. 2 is a flowchart illustrating a video sharpness switching method according to a second embodiment of the present application. As shown in fig. 2, the video definition switching method may include the following steps:
s201, receiving a definition switching request for the current definition media stream S1 at the current time.
In particular embodiments of the present application, the electronic device may receive a sharpness switch request for the current sharpness media stream S1 at the current time. Specifically, the electronic device may receive a manually sent or automatically sent sharpness switch request while the current sharpness media stream S1 is playing.
S202, determine the playing position corresponding to the current time in the pre-obtained sample information set of the current definition media stream S1.
In an embodiment of the present application, the electronic device may determine a playing position corresponding to the current time in the pre-acquired sample information set of the current sharpness media stream S1. Specifically, in the current definition media stream S1, there is a preset corresponding relationship between each playing time and playing position, so in this step, the electronic device can determine the playing position corresponding to the current time in the sample information set of the current definition media stream S1 acquired in advance.
And S203, according to the playing position corresponding to the current moment and the size of a predetermined buffer area, determining an expected switching point sample corresponding to the current moment in the sample information set of the current definition media stream S1.
In an embodiment of the present application, the electronic device may determine, according to the play position corresponding to the current time and the predetermined size of the buffer, an expected switching point sample corresponding to the current time in the sample information set of the current sharpness media stream S1. Specifically, the electronic device may use the play position corresponding to the current time as a starting point, obtain the video length of the buffer size backward (in the play direction) in the current definition media stream S1, and use this position as the desired switch point sample corresponding to the current time.
And S204, determining that the expected switching point sample is close to the previous key frame sample or close to the next key frame sample according to the position of the expected switching point sample and the positions of the previous key frame sample and the next key frame sample of the current definition media stream S1.
In particular embodiments of the present application, the electronic device may determine that the desired switch point sample is close to the previous keyframe sample and the next keyframe sample based on the location of the desired switch point sample and the location of the previous keyframe sample and the location of the next keyframe sample of the current sharpness media stream S1. Specifically, if t0< t1+ (t2-t1)/2, the electronic device may determine that the desired switch point sample is close to the last key frame sample; if t0> t1+ (t2-t1)/2, the electronic device may determine that it is desired to switch the sample to be closer to the next key frame sample; where t0 represents the location of the desired switch point sample; t1 represents the position of the last key frame sample; t2 represents the position of the next key frame sample.
Fig. 3 is a schematic diagram of a desired switch point sample close to a previous key frame sample according to the second embodiment of the present application. As shown in fig. 3, in the playing direction of the frame sequence, the sequence from left to right is: playing position, last key frame sample, expected switching point sample, next key frame sample, since t0< t1+ (t2-t1)/2, the electronic device may determine that the expected switching point sample is close to the last key frame sample; where t0 represents the location of the desired switch point sample; t1 represents the position of the last key frame sample; t2 denotes the position of the next key frame sample; therefore, the electronic device searches the key frame position backwards as the previous key frame sample, and switches the current definition media stream S1 to the target definition media stream S2 based on the previous key frame sample; in this case, the extra consumption data is less than T/2, and the extra consumption data is processed by frame polishing.
Fig. 4 is a schematic diagram of a sample expected to switch sample close to the next key frame sample provided in example two of the present application. As shown in fig. 4, in the playing direction of the frame sequence, the sequence from left to right is: the last key frame sample, the playing position, the expected switching point sample and the next key frame sample, and since t0> t1+ (t2-t1)/2, the electronic device can determine that the expected switching point sample is close to the next key frame sample; where t0 represents the location of the desired switch point sample; t1 represents the position of the last key frame sample; t2 denotes the position of the next key frame sample; therefore, the electronic device searches the key frame position backwards as the next key frame sample, and switches the current definition media stream S1 to the target definition media stream S2 based on the next key frame sample; this case has no extra data consumed and no frame dropping.
S205, if the sample of the expected switching point is close to the previous key frame sample, acquiring the previous key frame sample in the sample information set of the current definition media stream S1, and taking the previous key frame sample as a target key frame sample; if the switch sample is expected to be close to the next key frame sample, the next key frame sample is obtained from the sample information set of the current definition media stream S1, and the next key frame sample is used as the target key frame sample.
In a specific embodiment of the present application, if it is expected that the switch point sample is close to the previous key frame sample, the previous key frame sample is obtained in the sample information set of the current sharpness media stream S1, and the previous key frame sample is used as the target key frame sample; if the switch sample is expected to be close to the next key frame sample, the next key frame sample is obtained from the sample information set of the current definition media stream S1, and the next key frame sample is used as the target key frame sample. Specifically, if the expected switching point is close to the last key frame sample, as shown in fig. 3, T0< T1+ (T2-T1)/2, the timestamp of the last key frame is taken as the S2 data start downloading point, and S2 downloading is started immediately, in which case the extra consumption data is less than T/2. If it is desired to switch the sample to be close to the next key frame sample, as shown in fig. 4, t0> t1+ (t2-t1)/2, the timestamp of the next key frame is taken as the S2 data start downloading point, and the S2 media downloading is started when the S1 data is downloaded to t2, in this case, the repeated data of the media stream does not need to be downloaded, and the extra traffic consumption is zero. And returning the index of the key frame sample closest to the switching point sample as the target switching point.
Preferably, in an embodiment of the present application, the sample information set of the current sharpness media stream S1 may include: sample type, whether it is a key frame, sample timestamp, sample index number.
In the method for switching video definition provided in the embodiment of the application, a definition switching request for a current definition media stream S1 is received at a current time; then, in response to the definition switching request, determining an expected switching point sample corresponding to the current moment in a pre-acquired sample information set of the current definition media stream S1; then searching a key frame sample closest to the expected switching point sample in the current definition media stream S1; finally, the current sharpness media stream S1 is switched to the target sharpness media stream S2 based on the keyframe sample closest to the desired switch point sample. That is, in the technical solution of the present application, the key frame sample closest to the desired switch point sample may be taken as a target key frame sample, and the current sharpness media stream S1 may be switched to the target sharpness media stream S2 based on the target key frame sample. In the conventional video resolution switching method, the media stream buffering position of S1 is used as the desired switching point, and the last key frame of the desired switching point of S2 is found. Because the technical means of searching the key frame sample closest to the expected switching point sample in the current definition media stream S1 and switching the current definition media stream S1 to the target definition media stream S2 based on the key frame sample closest to the expected switching point sample is adopted, the technical problems of large extra flow consumption and more occupied resources in the prior art are solved, and the technical effects of effectively reducing extra user flow consumption during definition switching, enabling definition switching to be smoother and reducing switching delay in performance are achieved; moreover, the technical scheme of the embodiment of the application is simple and convenient to implement, convenient to popularize and wide in application range.
EXAMPLE III
Fig. 5 is a schematic structural diagram of a video sharpness switching apparatus according to a third embodiment of the present application. As shown in fig. 5, the apparatus 500 includes: a receiving module 501, a determining module 502, a searching module 503 and a switching module 504; wherein the content of the first and second substances,
the receiving module 501 is configured to receive a definition switching request for a current definition media stream S1 at a current time;
the determining module 502 is configured to determine, in response to the sharpness switching request, an expected switching point sample corresponding to the current time in a sample information set of the current sharpness media stream S1 that is obtained in advance;
the searching module 503 is configured to search the current sharpness media stream S1 for a key frame sample closest to the desired switching point sample;
the switch module 504 is configured to switch the current sharpness media stream S1 to a target sharpness media stream S2 based on a keyframe sample closest to the desired switch point sample.
Further, the determining module 502 is specifically configured to determine, in the sample information set of the current sharpness media stream S1 acquired in advance, a playing position corresponding to the current time;
and according to the playing position corresponding to the current moment and the size of a predetermined buffer area, determining an expected switching point sample corresponding to the current moment in the sample information set of the current definition media stream S1.
Fig. 6 is a schematic structural diagram of a lookup module provided in the third embodiment of the present application. As shown in fig. 6, the lookup module 503 includes: a determination sub-module 5031 and an acquisition sub-module 5032; wherein the content of the first and second substances,
the determining sub-module 5031 is configured to determine, according to the position of the expected switching point sample, and the position of the previous key frame sample and the position of the next key frame sample of the current sharpness media stream S1, that the expected switching point sample is close to the previous key frame sample or close to the next key frame sample;
the obtaining sub-module 5032, configured to, if the sample of the desired switching sample is close to the previous key frame sample, obtain the previous key frame sample in the sample information set of the current definition media stream S1, and use the previous key frame sample as a target key frame sample; if the sample of the desired switch is close to the next key frame sample, the next key frame sample is obtained from the sample information set of the current definition media stream S1, and the next key frame sample is used as the target key frame sample.
Further, the determining sub-module 5031 is specifically configured to determine that the sample of the desired switch sample is close to the last key frame sample if t0< t1+ (t2-t 1)/2; if t0> t1+ (t2-t1)/2, determining that the desired switch sample is substantially close to the next key frame sample; wherein t0 represents the location of the desired switch point sample; t1 represents the position of the last key frame sample; t2 represents the location of the next key frame sample.
Further, the sample information set of the current sharpness media stream S1 includes: sample type, whether it is a key frame, sample timestamp, sample index number.
The video definition switching device can execute the method provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method. For the technical details that are not described in detail in this embodiment, reference may be made to the video sharpness switching method provided in any embodiment of the present invention.
Example four
According to an embodiment of the present application, an electronic device and a readable storage medium are also provided.
Fig. 7 is a block diagram of an electronic device according to an embodiment of the present application. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be examples only, and are not meant to limit implementations of the present application that are described and/or claimed herein.
As shown in fig. 7, the electronic apparatus includes: one or more processors 701, a memory 702, and interfaces for connecting the various components, including a high-speed interface and a low-speed interface. The various components are interconnected using different buses and may be mounted on a common motherboard or in other manners as desired. The processor may process instructions for execution within the electronic device, including instructions stored in or on the memory to display graphical information of a GUI on an external input/output apparatus (such as a display device coupled to the interface). In other embodiments, multiple processors and/or multiple buses may be used, along with multiple memories and multiple memories, as desired. Also, multiple electronic devices may be connected, with each device providing portions of the necessary operations (e.g., as a server array, a group of blade servers, or a multi-processor system). In fig. 7, one processor 701 is taken as an example.
The memory 702 is a non-transitory computer readable storage medium as provided herein. The memory stores instructions executable by at least one processor to cause the at least one processor to perform the video sharpness switching method provided by the present application. The non-transitory computer-readable storage medium of the present application stores computer instructions for causing a computer to perform the video sharpness switching method provided herein.
The memory 702 is a non-transitory computer readable storage medium, and can be used to store non-transitory software programs, non-transitory computer executable programs, and modules, such as program instructions/modules (e.g., the receiving module 501, the determining module 502, the searching module 503, and the switching module 504 shown in fig. 5) corresponding to the video definition switching method in the embodiment of the present application. The processor 701 executes various functional applications of the server and data processing, i.e., implements the video sharpness switching method in the above-described method embodiment, by running non-transitory software programs, instructions, and modules stored in the memory 702.
The memory 702 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to use of the electronic device for the switching method of video definition, and the like. Further, the memory 702 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 702 may optionally include memory located remotely from processor 701, which may be connected to a switched video sharpness electronic device over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The electronic device of the video definition switching method may further include: an input device 703 and an output device 704. The processor 701, the memory 702, the input device 703 and the output device 704 may be connected by a bus or other means, and fig. 7 illustrates an example of a connection by a bus.
The input device 703 may receive input numeric or character information and generate key signal inputs related to user settings and function control of the electronic apparatus of the switching method of video definition, such as an input device of a touch screen, a keypad, a mouse, a track pad, a touch pad, a pointing stick, one or more mouse buttons, a track ball, a joystick, or the like. The output devices 704 may include a display device, auxiliary lighting devices (e.g., LEDs), and tactile feedback devices (e.g., vibrating motors), among others. The display device may include, but is not limited to, a Liquid Crystal Display (LCD), a Light Emitting Diode (LED) display, and a plasma display. In some implementations, the display device can be a touch screen.
Various implementations of the systems and techniques described here can be realized in digital electronic circuitry, integrated circuitry, application specific ASICs (application specific integrated circuits), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input device, and at least one output device.
These computer programs (also known as programs, software applications, or code) include machine instructions for a programmable processor, and may be implemented using high-level procedural and/or object-oriented programming languages, and/or assembly/machine languages. As used herein, the terms "machine-readable medium" and "computer-readable medium" refer to any computer program product, apparatus, and/or device (e.g., magnetic discs, optical disks, memory, Programmable Logic Devices (PLDs)) used to provide machine instructions and/or data to a programmable processor, including a machine-readable medium that receives machine instructions as a machine-readable signal. The term "machine-readable signal" refers to any signal used to provide machine instructions and/or data to a programmable processor.
To provide for interaction with a user, the systems and techniques described here can be implemented on a computer having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which a user can provide input to the computer. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic, speech, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a back-end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), Wide Area Networks (WANs), and the Internet.
The computer system may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other.
According to the technical scheme of the embodiment of the application, a definition switching request aiming at a current definition media stream S1 is received at the current moment; then, in response to the definition switching request, determining an expected switching point sample corresponding to the current moment in a pre-acquired sample information set of the current definition media stream S1; then searching a key frame sample closest to the expected switching point sample in the current definition media stream S1; finally, the current sharpness media stream S1 is switched to the target sharpness media stream S2 based on the keyframe sample closest to the desired switch point sample. That is, in the technical solution of the present application, the key frame sample closest to the desired switch point sample may be taken as a target key frame sample, and the current sharpness media stream S1 may be switched to the target sharpness media stream S2 based on the target key frame sample. In the conventional video resolution switching method, the media stream buffering position of S1 is used as the desired switching point, and the last key frame of the desired switching point of S2 is found. Because the technical means of searching the key frame sample closest to the expected switching point sample in the current definition media stream S1 and switching the current definition media stream S1 to the target definition media stream S2 based on the key frame sample closest to the expected switching point sample is adopted, the technical problems of large extra flow consumption and more occupied resources in the prior art are solved, and the technical effects of effectively reducing extra user flow consumption during definition switching, enabling definition switching to be smoother and reducing switching delay in performance are achieved; moreover, the technical scheme of the embodiment of the application is simple and convenient to implement, convenient to popularize and wide in application range.
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present application may be executed in parallel, sequentially, or in different orders, and the present invention is not limited thereto as long as the desired results of the technical solutions disclosed in the present application can be achieved.
The above-described embodiments should not be construed as limiting the scope of the present application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (12)
1. A method for video sharpness switching, the method comprising:
receiving a sharpness switch request for a current sharpness media stream S1 at a current time;
in response to the definition switching request, determining an expected switching point sample corresponding to the current moment in a pre-acquired sample information set of the current definition media stream S1;
finding a key frame sample closest to the desired switch point sample in the current sharpness media stream S1;
switching the current sharpness media stream S1 to a target sharpness media stream S2 based on a keyframe sample closest to the desired switch point sample.
2. The method according to claim 1, wherein said determining a desired switching point sample corresponding to said current time in a pre-obtained sample information set of said current sharpness media stream S1 comprises:
determining a playing position corresponding to the current moment in the pre-acquired sample information set of the current definition media stream S1;
and according to the playing position corresponding to the current moment and the size of a predetermined buffer area, determining an expected switching point sample corresponding to the current moment in the sample information set of the current definition media stream S1.
3. The method according to claim 1, wherein said finding a key frame sample closest to said desired switch point sample in said current sharpness media stream S1 comprises:
determining that the expected switching point sample is close to the last key frame sample or close to the next key frame sample according to the position of the expected switching point sample and the positions of the last key frame sample and the next key frame sample of the current definition media stream S1;
if the sample of the expected switching sample is close to the last key frame sample, acquiring the last key frame sample in the sample information set of the current definition media stream S1, and taking the last key frame sample as a target key frame sample;
if the sample of the desired switch is close to the next key frame sample, the next key frame sample is obtained from the sample information set of the current definition media stream S1, and the next key frame sample is used as the target key frame sample.
4. The method of claim 3, wherein the determining that the desired switch point sample is close to the previous key frame sample or close to the next key frame sample according to the location of the desired switch point sample and the location of the previous key frame sample and the location of the next key frame sample of the current sharpness media stream S1 comprises:
if t0< t1+ (t2-t1)/2, determining that the desired switch sample is substantially close to the last key frame sample;
if t0> t1+ (t2-t1)/2, determining that the desired switch sample is substantially close to the next key frame sample; wherein t0 represents the location of the desired switch point sample; t1 represents the position of the last key frame sample; t2 represents the location of the next key frame sample.
5. The method according to claim 1, wherein the sample information set of the current sharpness media stream S1 comprises: sample type, whether it is a key frame, sample timestamp, sample index number.
6. An apparatus for video sharpness switching, the apparatus comprising: the device comprises a receiving module, a determining module, a searching module and a switching module; wherein the content of the first and second substances,
the receiving module is configured to receive a definition switching request for a current definition media stream S1 at a current time;
the determining module is configured to determine, in response to the sharpness switching request, an expected switching point sample corresponding to the current time in a sample information set of the current sharpness media stream S1 that is obtained in advance;
the searching module is configured to search, in the current sharpness media stream S1, a keyframe sample closest to the desired switching point sample;
the switch module is configured to switch the current sharpness media stream S1 to a target sharpness media stream S2 based on a keyframe sample closest to the desired switch point sample.
7. The apparatus of claim 6, wherein:
the determining module is specifically configured to determine, in the pre-acquired sample information set of the current sharpness media stream S1, a playing position corresponding to the current time;
and according to the playing position corresponding to the current moment and the size of a predetermined buffer area, determining an expected switching point sample corresponding to the current moment in the sample information set of the current definition media stream S1.
8. The apparatus of claim 6, wherein the lookup module comprises: determining a submodule and an obtaining submodule; wherein the content of the first and second substances,
the determining submodule is configured to determine that the desired switching point sample is close to the previous key frame sample or close to the next key frame sample according to the position of the desired switching point sample, and the position of the previous key frame sample and the position of the next key frame sample of the current sharpness media stream S1;
the obtaining sub-module is configured to, if the sample of the expected switching sample is close to the previous key frame sample, obtain the previous key frame sample in the sample information set of the current sharpness media stream S1, and use the previous key frame sample as a target key frame sample; if the sample of the desired switch is close to the next key frame sample, the next key frame sample is obtained from the sample information set of the current definition media stream S1, and the next key frame sample is used as the target key frame sample.
9. The apparatus of claim 8, wherein:
the determining submodule is specifically configured to determine that the expected switch point sample is close to the last key frame sample if t0< t1+ (t2-t 1)/2; if t0> t1+ (t2-t1)/2, determining that the desired switch sample is substantially close to the next key frame sample; wherein t0 represents the location of the desired switch point sample; t1 represents the position of the last key frame sample; t2 represents the location of the next key frame sample.
10. The apparatus of claim 6, wherein the sample information set of the current sharpness media stream S1 comprises: sample type, whether it is a key frame, sample timestamp, sample index number.
11. An electronic device, comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-5.
12. A non-transitory computer readable storage medium having stored thereon computer instructions for causing the computer to perform the method of any one of claims 1-5.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111866433A (en) * | 2020-07-31 | 2020-10-30 | 腾讯科技（深圳）有限公司 | Video source switching method, video source playing method, video source switching device, video source playing device, video source equipment and storage medium |
| CN112087646A (en) * | 2020-08-26 | 2020-12-15 | 腾讯科技（深圳）有限公司 | Video playing method and device, computer equipment and storage medium |
| CN113225585A (en) * | 2020-01-21 | 2021-08-06 | 腾讯科技（深圳）有限公司 | Video definition switching method and device, electronic equipment and storage medium |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070174880A1 (en) * | 2005-07-05 | 2007-07-26 | Optibase Ltd. | Method, apparatus, and system of fast channel hopping between encoded video streams |
| CN101370139A (en) * | 2007-08-17 | 2009-02-18 | 华为技术有限公司 | Method and device for switching channels |
| CN101990112A (en) * | 2009-08-07 | 2011-03-23 | 未序网络科技（上海）有限公司 | Internet request signal dynamic switching method |
| CN105979404A (en) * | 2015-12-01 | 2016-09-28 | 乐视致新电子科技（天津）有限公司 | Streaming media processing method and device |
| US20160365123A1 (en) * | 2014-11-18 | 2016-12-15 | Le Holdings (Beijing) Co., Ltd. | Method and electronic device for video definition switching |
| US9621613B1 (en) * | 2013-11-05 | 2017-04-11 | Visualon, Inc. | Bitrate adaptation transitioning using key frames |
| CN109168078A (en) * | 2018-09-10 | 2019-01-08 | 苏宁智能终端有限公司 | A kind of video definition switching method and device |
| CN109246462A (en) * | 2018-10-11 | 2019-01-18 | 苏宁易购集团股份有限公司 | A kind of video flowing seamless handover method and device |
| CN109495761A (en) * | 2017-09-13 | 2019-03-19 | 杭州海康威视系统技术有限公司 | Video switching method and device |
-
2019
- 2019-09-17 CN CN201910874981.5A patent/CN110636338A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070174880A1 (en) * | 2005-07-05 | 2007-07-26 | Optibase Ltd. | Method, apparatus, and system of fast channel hopping between encoded video streams |
| CN101370139A (en) * | 2007-08-17 | 2009-02-18 | 华为技术有限公司 | Method and device for switching channels |
| CN101990112A (en) * | 2009-08-07 | 2011-03-23 | 未序网络科技（上海）有限公司 | Internet request signal dynamic switching method |
| US9621613B1 (en) * | 2013-11-05 | 2017-04-11 | Visualon, Inc. | Bitrate adaptation transitioning using key frames |
| US20160365123A1 (en) * | 2014-11-18 | 2016-12-15 | Le Holdings (Beijing) Co., Ltd. | Method and electronic device for video definition switching |
| CN105979404A (en) * | 2015-12-01 | 2016-09-28 | 乐视致新电子科技（天津）有限公司 | Streaming media processing method and device |
| CN109495761A (en) * | 2017-09-13 | 2019-03-19 | 杭州海康威视系统技术有限公司 | Video switching method and device |
| CN109168078A (en) * | 2018-09-10 | 2019-01-08 | 苏宁智能终端有限公司 | A kind of video definition switching method and device |
| CN109246462A (en) * | 2018-10-11 | 2019-01-18 | 苏宁易购集团股份有限公司 | A kind of video flowing seamless handover method and device |
Non-Patent Citations (3)
| Title |
|---|
| ABBAS JAVDTALAB;: "A rate control algorithm for ×264 high definition video conferencing", 《2011 IEEE INTERNATIONAL CONFERENCE ON MULTIMEDIA AND EXPO》, 5 September 2011 (2011-09-05) * |
| 刘云峰: "3G网络中的视频通信优化设计", 《半导体光电》, 15 August 2013 (2013-08-15) * |
| 方宏俊;宋利;杨小康;: "适配分辨率动态变化的低复杂度视频场景切换检测方法", 计算机科学, no. 02, 15 February 2017 (2017-02-15) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113225585A (en) * | 2020-01-21 | 2021-08-06 | 腾讯科技（深圳）有限公司 | Video definition switching method and device, electronic equipment and storage medium |
| CN111866433A (en) * | 2020-07-31 | 2020-10-30 | 腾讯科技（深圳）有限公司 | Video source switching method, video source playing method, video source switching device, video source playing device, video source equipment and storage medium |
| CN111866433B (en) * | 2020-07-31 | 2021-06-29 | 腾讯科技（深圳）有限公司 | Video source switching method, video source playing method, video source switching device, video source playing device, video source equipment and storage medium |
| CN112087646A (en) * | 2020-08-26 | 2020-12-15 | 腾讯科技（深圳）有限公司 | Video playing method and device, computer equipment and storage medium |
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