CN113055706B - Video synthesis method, device, electronic equipment and storage medium - Google Patents
Video synthesis method, device, electronic equipment and storage medium Download PDFInfo
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Abstract
The present disclosure relates to a video composition method, apparatus, electronic device, and storage medium, the method comprising: acquiring a preset resolution and a preset format of an original video; decoding an original picture, encoding and packaging the decoded original picture according to a preset resolution and a preset format, and respectively setting time stamps for the original picture and an original video to obtain a video cover picture with the resolution and the format being respectively the same as the preset resolution and the preset format, wherein the time stamp of the video cover picture is before the time stamp of the original video; and packaging the unpacked video cover picture and the unpacked original video according to the time stamp from front to back to obtain a target video file containing the video cover picture and the original video. According to the embodiment of the disclosure, compared with the process of setting the video cover in the related art, the process of decoding and encoding the original video is omitted, so that a great amount of time is saved, and the use experience of setting the cover is facilitated.
Description
Technical Field
The present disclosure relates to the field of video processing technologies, and in particular, to a video composition method, a video composition apparatus, an electronic device, and a storage medium.
Background
In order to facilitate the user to inquire about the video, a cover is supported to be set for the video in the related art, for example, a selected picture can be used as the cover of the video, so that the cover can be displayed before the video is played, the user can primarily know the content in the video according to the cover, and further the required video can be quickly found.
Currently, a cover is set on a video, and a first frame image or previous frames of images of the video are extracted as the cover. In order to ensure that the picture selected as the cover can be extracted as the cover, the related art needs to package the picture and the video into one file, and ensure that the picture is located before the video, the specific flow is as shown in fig. 1, the picture is decoded first to obtain non-compressed data of the picture, then the non-compressed data of the picture is encoded, and the encoded picture data is input into the video processing process.
The video can be firstly unpacked to obtain video compression data and audio compression data, then the video compression data and the audio compression data are decoded to obtain video non-compression data and audio non-compression data, then the video non-compression data and the audio non-compression data are encoded according to the encoded picture data, so that the encoded video data and the encoded audio data can be linked with the encoded picture data, finally the encoded video data and the encoded audio data are packaged to obtain packaged video, and the packaged and encoded picture data are packaged.
Accordingly, the picture and the video can be packaged into one file, and the picture is positioned in front of the video, so that when the cover is selected for the file, the picture in front of the video can be extracted to serve as the cover.
The disadvantage of the above approach is that the video itself needs to be decoded and encoded, which consumes much time and is detrimental to the cover use experience.
Disclosure of Invention
The present disclosure provides a video composing method, a video composing apparatus, an electronic device, and a storage medium, so as to at least solve the technical problem that the time-consuming process is more caused by decoding and encoding the video itself when composing the video for setting the cover in the related art. The technical scheme of the present disclosure is as follows:
according to a first aspect of an embodiment of the present disclosure, a video compositing method is provided, including:
acquiring a preset resolution and a preset format of an original video;
decoding an original picture, encoding and packaging the decoded original picture according to the preset resolution and the preset format, and respectively setting time stamps for the original picture and the original video in the process of encoding and packaging the original picture to obtain a video cover picture with the resolution and the format respectively identical to the preset resolution and the preset format, wherein the time stamp of the video cover picture is before the time stamp of the original video;
And respectively decapsulating the video cover picture and the original video, and encapsulating the decapsulated video cover picture and the decapsulated original video according to time stamps from front to back to obtain a target video file containing the video cover picture and the original video.
Optionally, the encoding and packaging the decoded original picture according to the preset resolution and the preset format includes:
decoding the original picture to obtain non-compressed data of the original picture;
encoding the non-compressed data of the original picture according to the preset resolution to obtain compressed data of the original picture with the resolution identical to the preset resolution;
and packaging the compressed data of the original picture according to the preset format to obtain the video cover picture with the same format as the preset format.
Optionally, the original pictures are multiple, and the setting the timestamps on the original pictures and the original video in the process of decoding and packaging the original pictures includes:
in the process of decoding and packaging the original pictures, setting a time stamp for each original picture according to a first preset time interval, so that the time interval between the time stamps of two adjacent frames of original pictures is equal to the first preset time interval;
Setting a time stamp for the original video according to a second preset time interval and the last time stamp in the time stamps of the original pictures, so that the time interval between the last time stamp and the time stamp of the original video is equal to the second preset time interval.
Optionally, the original picture is one, and the setting the time stamps on the original picture and the original video in the process of decoding and packaging the original picture includes:
in the process of decoding and packaging the original picture, setting time stamps for the original picture and the original video according to a third preset time interval, so that the time interval between the time stamp of the original picture and the time stamp of the original video is equal to the third preset time interval.
Optionally, before the time stamping is set on the original picture and the original video respectively, the method further comprises:
acquiring a preset audio sampling rate and preset audio channel information of an original video;
sequentially performing unpacking and decoding processing on the original audio, and encoding the decoded original audio according to the preset audio sampling rate and preset audio channel information to obtain target audio, wherein the sampling rate and the audio channel information of the target audio are the same as those of the preset audio;
And packaging the coded original picture and the coded original audio to obtain the video cover picture with the target audio.
According to a second aspect of an embodiment of the present disclosure, there is provided a video compositing apparatus, including:
the first acquisition module is configured to acquire a preset resolution and a preset format of the original video;
the first processing module is configured to decode an original picture, encode and encapsulate the decoded original picture according to the preset resolution and the preset format, and respectively set time stamps for the original picture and the original video in the process of encoding and encapsulating the original picture so as to obtain a video cover picture with the resolution and the format respectively identical to the preset resolution and the preset format, wherein the time stamp of the video cover picture is before the time stamp of the original video;
the second processing module is configured to perform decapsulation of the video cover picture and the original video respectively, and encapsulate the decapsulated video cover picture and the decapsulated original video from front to back according to a timestamp so as to obtain a target video file containing the video cover picture and the original video.
Optionally, the first processing module includes:
the decoding submodule is configured to execute decoding on the original picture to obtain uncompressed data of the original picture;
a coding sub-module configured to perform coding of the uncompressed data of the original picture according to the preset resolution to obtain compressed data of the original picture having the same resolution as the preset resolution;
and the packaging sub-module is configured to perform packaging on the compressed data of the original picture according to the preset format so as to obtain the video cover picture with the same format as the preset format.
Optionally, the original pictures are multiple, and the first processing module further includes:
a first setting sub-module configured to set a time stamp for each original picture according to a first preset time interval in the process of decoding and packaging the original pictures, so that a time interval between time stamps of two adjacent frames of original pictures is equal to the first preset time interval;
and a second setting sub-module configured to perform setting of a time stamp for the original video according to a second preset time interval and a last time stamp among time stamps of the plurality of original pictures so that a time interval between the last time stamp and the time stamp of the original video is equal to the second preset time interval.
Optionally, the original picture is one piece, and the first processing module further includes:
and the second setting sub-module is configured to set time stamps for the original pictures and the original video according to a third preset time interval in the process of decoding and packaging the original pictures, so that the time interval between the time stamps of the original pictures and the time stamps of the original video is equal to the third preset time interval.
Optionally, the apparatus further comprises:
the second acquisition module is configured to acquire preset audio sampling rate and preset audio channel information of the original video;
the third processing module is configured to perform de-encapsulation and decoding processing on the original audio in sequence, and encode the decoded original audio according to the preset audio sampling rate and preset audio channel information to obtain target audio, wherein the sampling rate and the audio channel information of the target audio are the same as the preset audio sampling rate and the preset audio channel information;
the second processing module is configured to encapsulate the encoded original picture and the encoded original audio to obtain the video cover picture with the target audio.
According to a third aspect of embodiments of the present disclosure, there is provided an electronic device, including:
a processor;
a memory for storing the processor-executable instructions;
wherein the processor is configured to execute the instructions to implement the video compositing method as described in any of the embodiments above.
According to a fourth aspect of embodiments of the present disclosure, a storage medium is provided, which when executed by a processor of an electronic device, enables the electronic device to perform the video compositing method according to any of the embodiments described above.
According to a fifth aspect of embodiments of the present disclosure, there is provided a computer program product configured to perform the video compositing method according to any of the embodiments described above.
The technical scheme provided by the embodiment of the disclosure at least brings the following beneficial effects:
according to the embodiment of the disclosure, an original video is not decoded and encoded, but only an original picture is decoded, and time stamps are respectively set for the original picture and the original video in the process of encoding and packaging the original picture, so that the time stamp of a video cover picture is before the time stamp of the original video, thereby ensuring that after a target video file is obtained by packaging the unpackaged video cover picture and the unpackaged original video from front to back according to the time stamp, a video cover picture in the target video file is positioned before the original video, and further, when the cover is extracted from the target video file, the video cover picture can be extracted as the cover.
Accordingly, compared with the prior art, the method and the device for setting the cover are used for synthesizing the video file, the process of decoding and encoding the original video is omitted, a large amount of time is saved, and the use experience of setting the cover is facilitated. And because the original video does not need to be decoded and encoded, wherein the encoding involves a compression process, the compression process is reduced, the damage to the data in the original video can be avoided, and the definition of the original video in the target video file can be ensured.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure and do not constitute an undue limitation on the disclosure.
Fig. 1 is a schematic flowchart of a video composition method in the related art.
Fig. 2 is a schematic flow chart diagram illustrating a video compositing method according to an embodiment of the disclosure.
Fig. 3 is a schematic flow chart of acquiring a preset resolution of an original video according to an embodiment of the present disclosure.
Fig. 4 is a schematic flow chart diagram illustrating another video compositing method according to an embodiment of the disclosure.
Fig. 5 is a schematic flow chart diagram illustrating yet another video compositing method according to an embodiment of the disclosure.
Fig. 6 is a schematic flow chart diagram illustrating yet another video compositing method according to an embodiment of the disclosure.
Fig. 7 is a schematic flow chart diagram illustrating yet another video compositing method according to an embodiment of the disclosure.
Fig. 8 is a schematic block diagram of a video compositing apparatus according to an embodiment of the disclosure.
Fig. 9 is a schematic block diagram of a first processing module shown in accordance with an embodiment of the present disclosure.
Fig. 10 is a schematic block diagram of another first processing module shown in accordance with an embodiment of the present disclosure.
Fig. 11 is a schematic block diagram of yet another first processing module shown in accordance with an embodiment of the present disclosure.
Fig. 12 is a schematic block diagram of another video compositing apparatus shown according to an embodiment of the disclosure.
Fig. 13 is a hardware configuration diagram of an apparatus in which a video compositing apparatus is shown according to an embodiment of the disclosure.
Detailed Description
In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings.
It should be noted that the terms "first," "second," and the like in the description and claims of the present disclosure and in the foregoing figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the disclosure described herein may be capable of operation in sequences other than those illustrated or described herein. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.
Fig. 2 is a schematic flow chart diagram illustrating a video compositing method according to an embodiment of the disclosure. The video synthesis method shown in the embodiment may be applied to electronic devices such as a terminal, a server, and the like, where the terminal includes, but is not limited to, a mobile phone, a tablet computer, a wearable device, and the like.
As shown in fig. 2, the video composition method may include the steps of:
in step S101, a preset resolution and a preset format of an original video are obtained;
In step S102, decoding an original picture, encoding and packaging the decoded original picture according to the preset resolution and the preset format, and setting time stamps for the original picture and the original video respectively in the process of encoding and packaging the original picture, so as to obtain a video cover picture with the resolution and the format being respectively the same as the preset resolution and the preset format, wherein the time stamp of the video cover picture is before the time stamp of the original video;
in step S103, the video cover picture and the original video are respectively unpacked, and the unpacked video cover picture and the unpacked original video are packaged according to the time stamp from front to back, so as to obtain a target video file containing the video cover picture and the original video.
Step S103 may be implemented by remux, and specifically, two or more encoded data may be packaged into one file, which does not involve encoding and decoding.
In one embodiment, the original picture may be one picture or a plurality of pictures. The original picture may be a picture selected from the original video, or may be a picture selected from a file other than the original video.
In order to package the original picture and the original video into one file, it is necessary to ensure that the preset resolution and preset format of the original picture and the original video are the same for packaging.
Taking the preset resolution as an example, the preset video attribute of the original video may be obtained, where the preset resolution of the original video may be obtained by a function avformat_open_input or av_find_best_stream in the ffmpeg, and for the Android system, the preset resolution may be obtained by mediametadata retriever, and for the iOS system, the preset resolution may be obtained by AVAsset.
Fig. 3 is a schematic flow chart of acquiring a preset resolution of an original video according to an embodiment of the present disclosure.
As shown in fig. 3, a video may be opened first, then the video may be parsed through an avformat_open_input to obtain the context information avformat contentpmt_ cxt of the video, then the format and index may be searched in the context information through the avformat_open_input, then the video stream index and the video stream may be further searched through the av_find_best_stream, and the video stream AVstreamer may be obtained, and for the video stream, resolution information, such as specific width information width and height information height, may be obtained through a codec.
And then the original picture can be decoded to obtain the decoded original picture, namely the uncompressed data of the original picture, and then the decoded original picture can be encoded and packaged according to the preset resolution and the preset format to obtain the video cover picture with the resolution and the format respectively identical to the preset resolution and the format. In the process of encoding and packaging, time stamps (presentation time stamp, pts for short) can also be respectively set for the original picture and the original video, so that the time stamp of the video cover picture is before the time stamp of the original video.
The video cover picture and the original video may be then unpacked, respectively, to obtain an unpacked video cover picture (i.e., compressed data of the video cover picture), and an unpacked original video (i.e., compressed data of the original video, specifically including video compressed data and audio compressed data of the original video).
Finally, the unpacked original picture and the original video can be packaged from front to back according to the time stamp, so that the original picture and the original video are packaged into a target video file, and the time stamp set by the encoded original picture is before the time stamp of the original video, so that the original picture in the target video file is positioned before the original video after the packaging process, and the original picture before the original video can be extracted to be used as the cover when the cover is selected from the target video file.
The method and the device have the advantages that the original video is not decoded and encoded, only the original picture is decoded, and the time stamp is respectively set for the original picture and the original video in the process of encoding and packaging the original picture, so that the time stamp of the video cover picture is before the time stamp of the original video, and further, after a target video file obtained by packaging the unpacked video cover picture and the unpacked original video from front to back according to the time stamp is ensured, the video cover picture in the target video file is positioned before the original video, and further, when the cover is extracted from the target video file, the video cover picture can be extracted to serve as the cover.
Accordingly, compared with the prior art, the method and the device for setting the cover are used for synthesizing the video file, the process of decoding and encoding the original video is omitted, a large amount of time is saved, and the use experience of setting the cover is facilitated. And because the original video does not need to be decoded and encoded, wherein the encoding involves a compression process, the compression process is reduced, the damage to the data in the original video can be avoided, and the definition of the original video in the target video file can be ensured.
For example, in the case that the resolution of the original video is 1080p and the duration is about 1 minute, and the original picture is one picture, the original picture and the original video are packaged into one target video file based on the prior art because the original video needs to be decoded and encoded, which takes about 32 seconds; in contrast, according to the present embodiment, since the original picture and the original video are packaged as one target video file without decoding and encoding the original video, it takes about 4 seconds, and 87.5% of time is saved compared to the related art.
For the original video with other resolutions, the technical solution of the embodiment also has obvious effects, for example, for the original video with the resolution of 720p and the duration of about 1 minute, the time spent on packaging the original picture and the original video into one target video file based on the related technology is about 27 seconds, and according to the embodiment, the time spent on packaging the original picture and the original video into one target video file is about 4 seconds, so that 85.2% of time is saved; for an original video with a resolution of 540p and a duration of about 1 minute, based on the related technology, it takes about 24 seconds to package the original picture and the original video into one target video file, and according to this embodiment, it takes about 3 seconds to package the original picture and the original video into one target video file, thereby saving 87.5% of time.
Fig. 4 is a schematic flow chart diagram illustrating another video compositing method according to an embodiment of the disclosure. As shown in fig. 4, the encoding and packaging the decoded original picture according to the preset resolution and the preset format includes:
in step S1021, decoding the original picture to obtain uncompressed data of the original picture;
in step S1022, the non-compressed data of the original picture is encoded according to the preset resolution, so as to obtain compressed data of the original picture with the resolution identical to the preset resolution;
in step S1023, the compressed data of the original picture is encapsulated according to the preset format, so as to obtain the video cover picture with the same format as the preset format.
In one embodiment, the non-compressed data of the original picture may be encoded according to a preset resolution, so as to adjust the resolution of the original picture, so as to obtain the compressed data of the picture with the same resolution as the preset resolution; and the compressed data of the original picture can be packaged according to a preset format, so that the format of the original picture is adjusted to obtain the video cover picture with the same format as the preset format.
Fig. 5 is a schematic flow chart diagram illustrating yet another video compositing method according to an embodiment of the disclosure. As shown in fig. 5, the original picture includes a plurality of pictures (a plurality of the original pictures may be different pictures or the same picture), and the setting of the time stamps on the original picture and the original video in the process of decoding and packaging the original picture includes:
in step S1024, in the process of decoding and packaging the original pictures, a time stamp is set for each original picture according to a first preset time interval, so that the time interval between the time stamps of the original pictures of two adjacent frames is equal to the first preset time interval.
In step S1025, a timestamp is set for the original video according to a second preset time interval and a last timestamp of the timestamps of the plurality of original pictures, so that a time interval between the last timestamp and the timestamp of the original video is equal to the second preset time interval.
In one embodiment, in the case that the original picture includes a plurality of original pictures, when setting the time stamp for the original picture, it is necessary to not only set the time stamp for the original picture and the original video, but also set the time stamp for each original picture separately, specifically, the time stamp may be set for each original picture according to a first preset time interval, and the time stamp may be set for the original video according to a second preset time interval and a last time stamp among the time stamps of the plurality of original pictures.
The first preset time interval and the second preset time interval can be preset according to requirements, so that the time interval between the time stamps of two adjacent frames of original pictures is equal to the first preset time interval, and the time interval between the last time stamp in the time stamps of the plurality of original pictures and the time stamp of the original video is equal to the second preset time interval.
Accordingly, when a plurality of original pictures are used as covers of the target video file, the original pictures can be played according to the time stamps of the original pictures when the covers are played, so that one original picture is played at intervals of a first preset time interval, and the original video is played again at intervals of a second preset time interval after the covers are played, and the playing effect is ensured to meet the user requirement.
Fig. 6 is a schematic flow chart diagram illustrating yet another video compositing method according to an embodiment of the disclosure. As shown in fig. 6, the original picture is one, and the setting of the time stamps on the original picture and the original video in the process of decoding and packaging the original picture includes:
in step S1026, in the process of decoding and packaging the original picture, time stamps are set for the original picture and the original video according to a third preset time interval, so that the time interval between the time stamp of the original picture and the time stamp of the original video is equal to the third preset time interval.
In one embodiment, in the case that the original picture includes one original picture, only the time stamps of the original picture and the original video need to be considered when setting the time stamp for the original picture, and specifically, the time stamp may be set for the original video according to the third preset time interval and the time stamp of the original picture, so that the time interval between the time stamp of the original picture and the time stamp of the original video is equal to the third preset time interval.
Accordingly, when the original picture is taken as the cover of the target video file, the original video can be played again at intervals of a third preset time interval after the cover is played, and the playing effect is ensured to meet the requirement of a user.
Fig. 7 is a schematic flow chart diagram illustrating yet another video compositing method according to an embodiment of the disclosure. As shown in fig. 7, before the original picture and the original video are respectively time stamped, the method further includes:
in step S104, a preset audio sampling rate and preset audio channel information of the original video are obtained;
in step S105, the original audio is sequentially subjected to decapsulation and decoding, and the decoded original audio is encoded according to the preset audio sampling rate and the preset audio channel information to obtain a target audio, where the sampling rate and the audio channel information of the target audio are the same as the preset audio sampling rate and the preset audio channel information;
In step S106, the encoded original picture and the target audio are encapsulated to obtain a video cover picture with the target audio.
In one embodiment, on the basis of packaging the original picture and the original video, so that the original picture is taken as the video cover picture, audio can be added into the video cover picture, so that when the video cover picture is played, not only the picture can be displayed, but also sound can be played.
Specifically, the preset audio sampling rate and the preset audio channel information of the original video can be obtained first, and then the original audio (which can be selected according to the need) is subjected to unpacking and decoding processing in sequence, so that the original audio uncompressed data is obtained.
And then the decoded original audio is encoded according to the preset audio sampling rate and the preset audio channel information to obtain target audio with the same sampling rate and channel information as the preset audio sampling rate and the preset audio channel information, and because the sampling rate and the audio channel information of the target audio are the same as the preset audio sampling rate and the preset audio channel information of the original video, the target audio in the video cover picture can be played in the same audio channel as the original video according to the same sampling rate as the original video without independently setting a time stamp for the target audio.
And finally, packaging the coded original picture and the target audio to obtain a video cover picture with the target audio. Therefore, after the video cover picture is set as the cover of the target video file, a user can watch the image in the cover and hear the sound in the cover when playing the cover.
It should be noted that, the decapsulation in the above embodiment may be implemented by a demux, that is, an audio-video separator, which may separate video compression data (e.g., h.264) and audio compression data (e.g., AAC) in encapsulated format (e.g., mp 4) data, so as to obtain video compression data and audio compression data, and coding and decoding are not involved in this process.
The encapsulation in the above embodiment may be implemented by a muxer, i.e. a video-audio multiplexer, which may merge video-compressed data (e.g. h.264) and audio-compressed data (e.g. AAC) into data in one encapsulation format (e.g. MKV), in which no encoding or decoding is involved.
The decoding in the above embodiment may be implemented by a decoder, that is, a decoder, which may decode video compressed data and audio compressed data to obtain video uncompressed data and audio uncompressed data.
The encoding in the above embodiment may be implemented by an encoder, that is, an encoder, and the encoding is the inverse process of decoding, and video uncompressed data and audio uncompressed data may be encoded and compressed by the encoder, so as to reduce the data volume. For example, in the case of encoding video uncompressed data, pixel data (e.g., RGB, YUV, etc.) is compressed into a video code stream to reduce the data amount of video, and in the case of encoding audio uncompressed data, audio sample data (e.g., PCM, etc.) is compressed into an audio code stream to reduce the data amount of audio.
The present disclosure also proposes embodiments of a video compositing apparatus, corresponding to the embodiments of the video compositing method described above.
Fig. 8 is a schematic block diagram of a video compositing apparatus according to an embodiment of the disclosure. The video composing apparatus shown in the embodiment may be applied to electronic devices such as a terminal, a server, and the like, where the terminal includes, but is not limited to, a mobile phone, a tablet computer, a wearable device, and the like.
As shown in fig. 8, the video compositing apparatus may include:
a first acquisition module 101 configured to perform acquisition of a preset resolution and a preset format of an original video;
A first processing module 102, configured to perform decoding of an original picture, encode and encapsulate the decoded original picture according to the preset resolution and the preset format, and set time stamps for the original picture and the original video during encoding and encapsulation of the original picture, so as to obtain a video cover picture with the resolution and the format being respectively the same as the preset resolution and the preset format, and the time stamp of the video cover picture is before the time stamp of the original video;
the second processing module 103 is configured to perform decapsulation of the video cover picture and the original video respectively, and encapsulate the decapsulated video cover picture and the decapsulated original video from front to back according to a timestamp, so as to obtain a target video file containing the video cover picture and the original video.
Fig. 9 is a schematic block diagram of a first processing module shown in accordance with an embodiment of the present disclosure. As shown in fig. 9, the first processing module 101 includes:
a decoding submodule 1011 configured to perform decoding of the original picture to obtain uncompressed data of the original picture;
A coding sub-module 1012 configured to perform coding of the non-compressed data of the original picture according to the preset resolution to obtain compressed data of the original picture having the same resolution as the preset resolution;
and a packaging submodule 1013 configured to perform packaging of the compressed data of the original picture according to the preset format to obtain the video cover picture with the same format as the preset format.
Fig. 10 is a schematic block diagram of another first processing module shown in accordance with an embodiment of the present disclosure. As shown in fig. 10, the original pictures are multiple, and the first processing module 101 further includes:
a first setting sub-module 1014 configured to perform setting a time stamp for each of the original pictures according to a first preset time interval in the process of decoding and packaging the original pictures such that a time interval between time stamps of adjacent two frames of original pictures is equal to the first preset time interval;
a second setting submodule 1015 configured to perform setting of a time stamp for the original video according to a second preset time interval and a last time stamp among time stamps of the plurality of original pictures so that a time interval between the last time stamp and the time stamp of the original video is equal to the second preset time interval.
Fig. 11 is a schematic block diagram of yet another first processing module shown in accordance with an embodiment of the present disclosure. As shown in fig. 11, the original picture is one, and the first processing module further includes:
a second setting sub-module 1016 configured to set a time stamp for the original picture and the original video according to a third preset time interval in the process of decoding and packaging the original picture, so that a time interval between the time stamp of the original picture and the time stamp of the original video is equal to the third preset time interval.
Fig. 12 is a schematic block diagram of another video compositing apparatus shown according to an embodiment of the disclosure. As shown in fig. 12, the apparatus further includes:
a second acquisition module 104 configured to perform acquisition of a preset audio sampling rate and preset audio channel information of the original video;
a third processing module 105, configured to perform a process of sequentially decapsulating and decoding the original audio, and encode the decoded original audio according to the preset audio sampling rate and preset audio channel information to obtain a target audio, where the sampling rate and the audio channel information of the target audio are the same as the preset audio sampling rate and the preset audio channel information;
Wherein the second processing module 102 is configured to encapsulate the encoded original picture and the encoded original audio to obtain the video cover picture with the target audio.
The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.
The embodiment of the video compositing device shown in the embodiment of the disclosure can be applied to electronic equipment such as a terminal or a server. The apparatus embodiments may be implemented by software, or may be implemented by hardware or a combination of hardware and software. Taking a software implementation as an example, the device in a logic sense is formed by reading corresponding computer program instructions in a nonvolatile memory into a memory by a processor of a device where the device is located for operation. In terms of hardware, as shown in fig. 13, a hardware structure diagram of a device where a video compositing apparatus according to an embodiment of the disclosure is located is shown, where in addition to a processor, a network interface, a memory, and a nonvolatile memory shown in fig. 13, the device where the apparatus is located may generally include other hardware, such as a forwarding chip responsible for processing a packet, etc.; the device may also be a distributed device in terms of hardware architecture, possibly comprising a plurality of interface cards, for the extension of the message processing at the hardware level.
The embodiment of the disclosure also proposes an electronic device, including:
a processor;
a memory for storing the processor-executable instructions;
wherein the processor is configured to execute the instructions to implement the video compositing method according to any of the embodiments described above.
Embodiments of the present disclosure also propose a storage medium, which when executed by a processor of an electronic device, enables the electronic device to perform the video compositing method described in any of the above embodiments.
Embodiments of the present disclosure also propose a computer program product configured to perform the video compositing method according to any of the embodiments described above.
Alternatively, the storage medium may be a non-transitory computer readable storage medium, which may be, for example, ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like.
Embodiments of the present disclosure also propose a computer program product configured to perform the video compositing method according to any of the embodiments described above.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any adaptations, uses, or adaptations of the disclosure following the general principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing has outlined the detailed description of the method and apparatus provided by the embodiments of the present disclosure, and the detailed description of the principles and embodiments of the present disclosure has been provided herein with the application of the specific examples, the above examples being provided only to facilitate the understanding of the method of the present disclosure and its core ideas; meanwhile, as one of ordinary skill in the art will have variations in the detailed description and the application scope in light of the ideas of the present disclosure, the present disclosure should not be construed as being limited to the above description.
Claims (10)
1. A method of video composition, comprising:
acquiring a preset resolution and a preset format of an original video;
decoding the original picture to obtain non-compressed data of the original picture; encoding the non-compressed data of the original picture according to the preset resolution to obtain compressed data of the original picture with the resolution identical to the preset resolution; packaging the compressed data of the original picture according to the preset format to obtain a video cover picture with the format identical to the preset format, and respectively setting time stamps for the original picture and the original video in the process of encoding and packaging the original picture, wherein the resolution and the format of the video cover picture are identical to the preset resolution and the preset format respectively, and the time stamp of the video cover picture is before the time stamp of the original video;
respectively decapsulating the video cover picture and the original video, and encapsulating the decapsulated video cover picture and the decapsulated original video according to a time stamp from front to back to obtain a target video file containing the video cover picture and the original video, so as to extract the video cover picture as a cover of the target video file;
The unpacked video cover picture comprises compressed data of the video cover picture; the unpacked original video includes compressed data of the original video.
2. The method of claim 1, wherein the original picture is a plurality of pictures, and wherein the time stamping the original picture and the original video during the decoding and packaging of the original picture respectively comprises:
in the process of decoding and packaging the original pictures, setting a time stamp for each original picture according to a first preset time interval, so that the time interval between the time stamps of two adjacent frames of original pictures is equal to the first preset time interval;
setting a time stamp for the original video according to a second preset time interval and the last time stamp in the time stamps of the original pictures, so that the time interval between the last time stamp and the time stamp of the original video is equal to the second preset time interval.
3. The method of claim 1, wherein the original picture is one, and wherein the time stamping the original picture and the original video during the decoding and packaging of the original picture comprises:
In the process of decoding and packaging the original picture, setting time stamps for the original picture and the original video according to a third preset time interval, so that the time interval between the time stamp of the original picture and the time stamp of the original video is equal to the third preset time interval.
4. A method according to any one of claims 1 to 3, characterized in that before time stamping the original picture and the original video, respectively, the method further comprises:
acquiring a preset audio sampling rate and preset audio channel information of an original video;
sequentially performing unpacking and decoding processing on the original audio, and encoding the decoded original audio according to the preset audio sampling rate and preset audio channel information to obtain target audio, wherein the sampling rate and the audio channel information of the target audio are the same as those of the preset audio;
and packaging the coded original picture and the coded original audio to obtain the video cover picture with the target audio.
5. A video compositing apparatus, comprising:
the first acquisition module is configured to acquire a preset resolution and a preset format of the original video;
The first processing module is configured to execute decoding on the original picture to obtain uncompressed data of the original picture; encoding the non-compressed data of the original picture according to the preset resolution to obtain compressed data of the original picture with the resolution identical to the preset resolution; packaging the compressed data of the original picture according to the preset format to obtain a video cover picture with the format identical to the preset format, and respectively setting time stamps for the original picture and the original video in the process of encoding and packaging the original picture, wherein the resolution and the format of the video cover picture are identical to the preset resolution and the preset format respectively, and the time stamp of the video cover picture is before the time stamp of the original video;
the second processing module is configured to perform unpacking of the video cover picture and the original video respectively, and package the unpacked video cover picture and the unpacked original video from front to back according to a timestamp to obtain a target video file containing the video cover picture and the original video so as to extract the video cover picture as a cover of the target video file;
The unpacked video cover picture comprises compressed data of the video cover picture; the unpacked original video includes compressed data of the original video.
6. The apparatus of claim 5, wherein the original picture is a plurality of pictures, the first processing module further comprising:
a first setting sub-module configured to set a time stamp for each original picture according to a first preset time interval in the process of decoding and packaging the original pictures, so that a time interval between time stamps of two adjacent frames of original pictures is equal to the first preset time interval;
and a second setting sub-module configured to perform setting of a time stamp for the original video according to a second preset time interval and a last time stamp among time stamps of the plurality of original pictures so that a time interval between the last time stamp and the time stamp of the original video is equal to the second preset time interval.
7. The apparatus of claim 5, wherein the original picture is a sheet, and the first processing module further comprises:
and the second setting sub-module is configured to set time stamps for the original pictures and the original video according to a third preset time interval in the process of decoding and packaging the original pictures, so that the time interval between the time stamps of the original pictures and the time stamps of the original video is equal to the third preset time interval.
8. The apparatus according to any one of claims 5 to 7, further comprising:
the second acquisition module is configured to acquire preset audio sampling rate and preset audio channel information of the original video;
the third processing module is configured to perform de-encapsulation and decoding processing on the original audio in sequence, and encode the decoded original audio according to the preset audio sampling rate and preset audio channel information to obtain target audio, wherein the sampling rate and the audio channel information of the target audio are the same as the preset audio sampling rate and the preset audio channel information;
the second processing module is configured to encapsulate the encoded original picture and the encoded original audio to obtain the video cover picture with the target audio.
9. An electronic device, comprising:
a processor;
a memory for storing the processor-executable instructions;
wherein the processor is configured to execute the instructions to implement the video compositing method of any of claims 1-4.
10. A storage medium, characterized in that instructions in the storage medium, when executed by a processor of an electronic device, enable the electronic device to perform the video compositing method of any of claims 1-4.
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