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ffmpeg # -c copy 拷贝所有的流 - 简书
https://www.jianshu.com/p/a4b32b3ebd2f#:~:text=encodes%20all%20video%20streams%20with%20libx264%20and%20copies,138th%20audio%2C%20which%20will%20be%20encoded%20with%20libvorbis.
Ffmpeg to duplicate an audio stream and encode this …
https://stackoverflow.com/questions/21567029/ffmpeg-to-duplicate-an-audio-stream-and-encode-this-new-stream
This command will take a video with 1 audio stream, and downmix to stereo and convert the audio stream and add it as a 2nd audio stream. It will be in AAC 384k. ffmpeg -i INPUT.mkv -strict -2 -map 0 -c copy -map 0:a:0 -c:a:1 aac -b:a 384k -ac 2 OUTPUT.mkv. Explanation of the command. ffmpeg -i INPUT.mkv The application and input file-strict -2 …
How to Extract Audio from Video Using FFmpeg
https://www.leawo.org/entips/how-to-extract-audio-from-video-using-ffmpeg-1400.html
ffmpeg -i myvideo.mp4 -vn -acodec copy audio.ogg Replace myvideo.mp4 with the video filename/path, and audio.ogg with the name you want to use for the audio output filename, and the extension. In this command, -i is used to specify the path and filename of the input video, -vn skips the inclusion of the video stream, while -acodec copy is for copying the original audio …
ffmpeg Documentation
https://ffmpeg.org/ffmpeg.html
3.2 Stream copy Stream copy is a mode selected by supplying the copy parameter to the -codec option. It makes ffmpeg omit the decoding and encoding step for the specified stream, so it does only demuxing and muxing. It is useful for changing the container format or modifying container-level metadata.
FFmpeg: Extract Audio From Video In Original Format Or ...
https://www.linuxuprising.com/2019/11/ffmpeg-extract-audio-from-video-in.html
ffmpeg -i myvideo.mp4 -vn -acodec copy audio.ogg Replace myvideo.mp4 with the video filename/path, and audio.ogg with the name you want to use for the audio output filename, and the extension. In this command, -i is used to specify the path and filename of the input video, -vn skips the inclusion of the video stream, while -acodec copy is for copying the original audio …
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