CN115190359A - Automatic conversion method and system for video playing format - Google Patents
Automatic conversion method and system for video playing format Download PDFInfo
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- CN115190359A CN115190359A CN202210518209.1A CN202210518209A CN115190359A CN 115190359 A CN115190359 A CN 115190359A CN 202210518209 A CN202210518209 A CN 202210518209A CN 115190359 A CN115190359 A CN 115190359A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440218—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/485—End-user interface for client configuration
- H04N21/4854—End-user interface for client configuration for modifying image parameters, e.g. image brightness, contrast
Abstract
The invention discloses a method and a system for automatically converting video playing formats, wherein the method comprises the following steps: receiving a first video, and transmitting a digital video signal corresponding to the first video to a display device when the first video format belongs to a video format supported by the display device; when the first video format does not belong to the video format supported by the display device, acquiring a conversion parameter of the first video, converting the first video format of the first video into a second video format according to the conversion parameter and generating a second video, wherein each frame of the first video is uniformly and uniformly mapped into each frame of the second video; and sending the digital video signal corresponding to the second video to the display device. The invention ensures the transmission stability of the video data and avoids the conversion error in the format conversion and playing process, and the synchronization of the conversion and the playing can be realized while the accuracy of the automatic video conversion process is ensured by adopting the mode.
Description
Technical Field
The invention belongs to the field of video conversion, and particularly relates to a method and a system for automatically converting a video playing format.
Background
The video file format refers to a format for video storage, and video is an important ring in a multimedia system in a computer. To accommodate the need to store video, different video file formats have been set to place video and audio in a single file for convenient simultaneous playback. Video file formats have different classifications, such as: microsoft video is mostly wmv, asf and asx, real Player is mostly rm and rmvb, MPEG video is mostly mp4, mobile phone video is mostly 3gp, apple video is mostly mov and m4v, and other common videos are avi, dat, mkv, flv and vob.
With the use of the internet, data transmission is increasing, and a video is often transmitted from one device to another device, but it is difficult for one device to consider all video formats, and when data transmission is viewed, a format conversion tool is often required to be used to convert the format of the video from a format to a format b so as to adapt to different devices, and then corresponding software is used to open the devices, so that the operation is complex and the use is inconvenient.
In addition, format conversion is performed by decoding the original video into corresponding video data and re-encoding the video data into the target format. In the process, due to various reasons such as change of code rate after recoding and the like, a certain frame of picture can be lost, so that the decoded and recoded digital codes cannot be in one-to-one correspondence, and further errors of subsequent conversion are caused, so that the picture is damaged or repeated; especially, on a device which performs conversion and playing simultaneously, the requirement on the running memory of the device is higher, and the synchronization of the conversion and the playing can be realized.
Disclosure of Invention
Aiming at the picture problem caused by format conversion errors in the prior art, the invention provides an automatic conversion method for video playing formats, which can ensure no error in the video conversion process and can play in real time while converting.
The invention also provides a system for automatically converting the video playing format, which can realize the method.
In order to solve the technical problems, the invention provides the following technical scheme:
a method for automatic conversion of video playing format, said method comprising the steps of:
receiving a first video, wherein the video format of the first video is a first video format;
when the first video format belongs to the video formats supported by the display device, sending a digital video signal corresponding to the first video to the display device;
when the first video format does not belong to the video formats supported by the display device, acquiring the conversion parameter of the first video, converting the first video format of the first video into the second video format according to the conversion parameter and generating the second video, wherein each frame of the first video is uniformly mapped to each frame of the second video; wherein the second video format is a video format supported by a display device; and sending the digital video signal corresponding to the second video to the display device.
Preferably, each frame of the first video is uniformly mapped into each frame of the second video, and the method comprises the following steps:
acquiring an image of a first video at any time point as a first frame, and acquiring a time point corresponding to the first frame;
acquiring an image corresponding to the time point in a second video as a second frame;
and judging whether the first frame and the second frame are completely coincided.
Preferably, after the digital video signal corresponding to the first video is transmitted to the display device or the digital video signal corresponding to the second video is transmitted to the display device, the method further includes:
obtaining a brightness analysis result of an environment to be played to obtain a first brightness value;
and determining a brightness adjusting strategy under the current playing environment according to the brightness analysis result, and adjusting the brightness of the image frame of the first video or the second video.
Preferably, the brightness adjustment strategy comprises:
acquiring a second brightness value of the first video or the second video image frame, processing the second brightness value to obtain an average brightness value, and judging whether the second brightness value exceeds a set threshold value according to a difference value between the first brightness value and the average brightness value;
if the difference value exceeds the set threshold value, adjusting the brightness of the image frame of the first video or the second video until the difference value between the first brightness value and the average brightness value is within the set threshold value;
and if the preset threshold value is not exceeded, playing the first video or the second video under the current environment.
An automatic video playback format conversion system, comprising:
the video input module is used for receiving a first video and storing a digital video signal corresponding to a first video format; the video format of the first video is a first video format;
the pre-verification module is used for obtaining the conversion parameter of the first video format when verifying whether the first video format belongs to the video formats supported by the display device;
the format conversion module is used for converting the first video format of the first video into a second video format according to the conversion parameters and generating a second video; the format of the second video is a second video format, and the second video format is a video format supported by the display device;
the video output module is used for sending a digital video signal corresponding to the first video or the second video to the display device;
and the display device is used for displaying the first video or the second video.
Preferably, the video processing device further comprises a mapping module for verifying whether there is an error in the conversion process of the first video format into the second video format.
Preferably, the display device further comprises a brightness analysis module, configured to obtain a second brightness value of the first video and the second video image frame, and obtain a first brightness value of the environment to be played.
Preferably, the system further comprises a brightness processing module, configured to convert the second brightness values of all the image frames into an average brightness value, and generate a brightness adjustment strategy according to a difference between the first brightness value and the second brightness value.
Has the beneficial effects that:
the invention can ensure the transmission stability of the video data and avoid the conversion error in the data processing and transmitting process by utilizing the compliance and the mapping of the frames in the format conversion and playing process, and can realize the synchronization of the conversion and the playing while ensuring the accuracy of the automatic video conversion process by adopting the mode.
It should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below may be considered as part of the inventive subject matter unless such concepts are mutually inconsistent.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below. It should be apparent that the described embodiments are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.
The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Similarly, the singular forms "a," "an," or "the" do not denote a limitation of quantity, but rather denote the presence of at least one, unless the context clearly dictates otherwise. The terms "comprises," "comprising," or the like, mean that the elements or items listed before "comprises" or "comprising" encompass the features, integers, steps, operations, elements, and/or components listed after "comprising" or "comprising," and do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationships may also change accordingly.
The invention ensures that the video data transmission is stable by verifying the compliance of the video and the mapping of the frame, rapidly screens the video format, judges whether the automatic conversion is needed or not, and then plays the video while converting. The present invention will be described in further detail below with reference to specific examples.
A video playing format automatic conversion method is applied to a display system supporting playing of videos, the display system comprises a processing device and a display device, the display device supports multiple interface modes, and the method comprises the following steps:
s100, receiving a first video, wherein the video format of the first video is a first video format;
in this step, after determining the video format of the currently received first video, the processing device further determines the interface mode currently used, where the interface mode is determined by the protocol when the processing device and the display device establish a physical connection.
S110, when the first video format belongs to the video formats supported by the display device, sending a digital video signal corresponding to the first video to the display device;
s120, when the first video format does not belong to the video format supported by the display device, obtaining a conversion parameter of the first video, converting the first video format of the first video into a second video format according to the conversion parameter and generating a second video, wherein each frame of the first video is uniformly and uniformly mapped into each frame of the second video; wherein the second video format is a video format supported by a display device; and sending the digital video signal corresponding to the second video to the display device.
In this embodiment, by verifying the compliance of the first video format, whether the video needs to be converted is quickly screened, and the mapping of frames is added on the basis again, so that the accuracy of the video in the conversion and playing process is improved, and then synchronous conversion and playing are realized.
In order to further improve the accuracy of video conversion, the mapping of frames described in S120 includes the following steps:
each frame of the first video is uniformly mapped into each frame of the second video, and the method comprises the following steps:
acquiring an image of a first video at any time point as a first frame, and acquiring a time point corresponding to the first frame;
acquiring an image corresponding to the time point in a second video as a second frame;
and judging whether the first frame and the second frame are completely coincided.
If the digital video signals are completely overlapped, the corresponding digital video signals are sent to a display device; if not, re-entering step S120 until the converted frames are mapped in a one-to-one correspondence.
By the verification mode, double verification is performed, and the accuracy of the method is improved. The mapping of frames can be repeated for a plurality of times, and the accuracy is further improved.
The conversion parameters include video encoding, frame rate when playing, picture size and code rate of the first video.
To reduce the conversion of video, the video formats supported by the display device include one or more of Ogg, MPEG4, or WebM. The application range is wide.
The digital video signal is transmitted to the display device, and meanwhile, the digital video signal can be adaptively adjusted according to the surrounding environment, so that the display device displays different brightness, and the human eyes can watch the digital video signal comfortably.
After the digital video signal corresponding to the first video is transmitted to the display device or the digital video signal corresponding to the second video is transmitted to the display device, the method further comprises the following steps:
obtaining a brightness analysis result of an environment to be played to obtain a first brightness value;
and determining a brightness adjusting strategy under the current playing environment according to the brightness analysis result, and adjusting the brightness of the image frame of the first video or the second video.
The brightness adjustment strategy comprises:
acquiring a second brightness value of the first video or the second video image frame, processing the second brightness value to obtain an average brightness value, and judging whether the second brightness value exceeds a set threshold value or not according to a difference value of the first brightness value and the average brightness value;
if the difference value exceeds the set threshold value, adjusting the brightness of the image frame of the first video or the second video until the difference value between the first brightness value and the average brightness value is within the set threshold value;
if the preset threshold value is not exceeded, the first video or the second video is played in the current environment
The embodiment further provides an automatic video playing format conversion system, which is used for implementing the method and specifically includes:
the video input module is used for receiving a first video and storing a digital video signal corresponding to a first video format; the video format of the first video is a first video format;
the pre-verification module is used for obtaining the conversion parameter of the first video format when verifying whether the first video format belongs to the video formats supported by the display device;
the format conversion module is used for converting the first video format of the first video into a second video format according to the conversion parameters and generating a second video; the format of the second video is a second video format, and the second video format is a video format supported by the display device;
the video output module is used for sending a digital video signal corresponding to the first video or the second video to the display device;
and the display device is used for displaying the first video or the second video.
The video format conversion device also comprises a mapping module used for verifying whether errors exist in the process of converting the first video format into the second video format.
The video playing format automatic conversion system further comprises a brightness analysis module used for obtaining a second brightness value of the first video and the second video image frame and obtaining a first brightness value of the environment to be played.
The video playing format automatic conversion system also comprises a brightness processing module which is used for converting the second brightness values of all the image frames into an average brightness value and generating a brightness adjusting strategy according to the difference between the first brightness value and the second brightness value.
The embodiment also provides an electronic device, which comprises a processor and a memory; the memory is used for storing computer-executable instructions, and when the electronic device runs, the processor executes the computer-executable instructions stored by the memory to enable the electronic device to execute the method.
The processor is preferably, but not limited to, a Central Processing Unit (CPU). For example, the Processor may be other general purpose processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, or a combination thereof.
The memory is used as a non-transitory computer readable storage medium for storing non-transitory software programs, non-transitory computer executable programs and modules, such as program instructions/modules corresponding to the method in the embodiment of the present invention, and the processor executes various functional applications and data processing of the processor by executing the non-transitory software programs, instructions and modules stored in the memory, so as to implement the method in the above-described method embodiment.
The memory 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 by the processor, and the like. Further, the memory is preferably, but not limited to, a high speed random access memory, for example, but also a non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory may also optionally include memory located remotely from the processor, which may be connected to the processor through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above may be implemented by a computer program, which is stored in a computer readable storage medium and can include the processes of the embodiments of the methods described above when the computer program is executed. When the computer instructions are run on an electronic device, the electronic device is caused to perform the method. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory (Flash Memory), a Hard Disk (Hard Disk Drive, abbreviated as HDD), a Solid State Drive (SSD), or the like; the storage medium may also comprise a combination of memories of the kind described above.
The present embodiment also provides a computer program product comprising program code for implementing the method when executed by a processor in an electronic device.
These computer programs may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks, and corresponding steps may be implemented by different modules.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention should be determined by the appended claims.
Claims (10)
1. A method for automatically converting video playing format, which is characterized by comprising the following steps:
receiving a first video, wherein the video format of the first video is a first video format;
when the first video format belongs to the video formats supported by the display device, sending a digital video signal corresponding to the first video to the display device;
when the first video format does not belong to the video formats supported by the display device, acquiring the conversion parameter of the first video, converting the first video format of the first video into the second video format according to the conversion parameter and generating the second video, wherein each frame of the first video is uniformly mapped to each frame of the second video; wherein the second video format is a video format supported by a display device; and sending the digital video signal corresponding to the second video to the display device.
2. The method of claim 1, wherein each frame of the first video is uniformly mapped to each frame of the second video, comprising:
acquiring an image of a first video at any time point as a first frame, and acquiring a time point corresponding to the first frame;
acquiring an image corresponding to the time point in a second video as a second frame;
and judging whether the first frame and the second frame are completely coincided.
3. The method of claim 1, further comprising, after transmitting the digital video signal corresponding to the first video to a display device or transmitting the digital video signal corresponding to the second video to the display device:
obtaining a brightness analysis result of an environment to be played to obtain a first brightness value;
and determining a brightness adjusting strategy under the current playing environment according to the brightness analysis result, and adjusting the brightness of the image frame of the first video or the second video.
4. The method of claim 3, wherein the brightness adjustment strategy comprises:
acquiring a second brightness value of the first video or the second video image frame, processing the second brightness value to obtain an average brightness value, and judging whether the second brightness value exceeds a set threshold value according to a difference value between the first brightness value and the average brightness value;
if the brightness of the image frame exceeds the set threshold, brightness adjustment is carried out on the image frame of the first video or the second video until the difference value between the first brightness value and the average brightness value is within the set threshold;
and if the video does not exceed the set threshold, playing the first video or the second video in the current environment.
5. An automatic video playback format conversion system, comprising:
the video input module is used for receiving a first video and storing a digital video signal corresponding to a first video format; the video format of the first video is a first video format;
the pre-verification module is used for obtaining the conversion parameter of the first video format when verifying whether the first video format belongs to the video format supported by the display device;
the format conversion module is used for converting a first video format of the first video into a second video format according to the conversion parameters and generating a second video; the format of the second video is a second video format, and the second video format is a video format supported by the display device;
the video output module is used for sending a digital video signal corresponding to the first video or the second video to the display device;
and the display device is used for displaying the first video or the second video.
6. The system of claim 5, further comprising a mapping module for verifying whether there is an error in the conversion of the first video format to the second video format.
7. The system of claim 5, further comprising a brightness analysis module for obtaining a second brightness value of the first video and the second video image frame, and for obtaining a first brightness value of the environment to be played.
8. The system of claim 5, further comprising a brightness processing module for converting the second brightness value of all image frames into an average brightness value and generating a brightness adjustment strategy according to the difference between the first brightness value and the second brightness value.
9. An electronic device comprising a processor and a memory; the memory is configured to store computer-executable instructions that, when executed by the electronic device, cause the electronic device to perform the method of any of claims 1-4.
10. A computer storage medium comprising computer instructions that, when executed on an electronic device, cause the electronic device to perform the method of any of claims 1-4.
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