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h.264 - Demux audio (AMR_WB) and video(H264) from …
https://stackoverflow.com/questions/14539510/demux-audio-amr-wb-and-videoh264-from-mp4-file-using-ffmpeg
Pass 1, just get the Vid. ffmpeg -i phoneCam_20120902_112701.mp4 -map 0:0 -c copy tout1.mp4. Pass2 just get the aud. ffmpeg -i phoneCam_20120902_112701.mp4 -map 0:1 -c aac -ar 48000 -ab 48000 -strict -2 tout2.3gp. In your program, just run ffmpeg from the CLI or call main () in ffmpeg.c. Share. Improve this answer.
How can I extract audio from video with ffmpeg? - Stack ...
https://stackoverflow.com/questions/9913032/how-can-i-extract-audio-from-video-with-ffmpeg
To just extract audio (without re-encoding): ffmpeg.exe -i in.mp4 -vn -c:a copy out.m4a To extract audio & downmix to stereo (without re-encoding): ffmpeg.exe -i in.mp4 -vn -c:a copy -ac 2 out.m4a To generate an mp3 file, you'd re-encode audio: ffmpeg.exe -i in.mp4 -vn …
how do I demux an MP4? - VideoHelp Forum
https://forum.videohelp.com/threads/329496-how-do-I-demux-an-MP4
Terminal will translate this action to the full path to ffmpeg. Type "-i " (with a space at the end). Drag-and-drop your source file. Type "-vn -acodec copy " (with a space at the end). Drag-and-drop your source file again. Backspace a few times to delete the last "mp4", then replace it with the wanted suffix. Hit <enter>. Done.
Does ffmpeg support mux/demux of mp4 files?
https://ffmpeg-devel.ffmpeg.narkive.com/BP2mCus9/does-ffmpeg-support-mux-demux-of-mp4-files
ffmpeg-0.4.6. Even a slightest hint may prove very useful to us. Thanks in advance, Proper MPEG-4 (mp4) files are actually Apple Quicktime files with. some extra information. ffmpeg can handle QT files. But I just tried the. latest ffmpeg CVS snapshot and it does not appear to handle the MPEG-4. extensions yet.
How to Extract Audio from Video Using FFmpeg
https://www.leawo.org/entips/how-to-extract-audio-from-video-using-ffmpeg-1400.html
And check the below command line: ffmpeg -i myvideo.mp4 -ss 00:00:00 -t 00:00:00.0 -vn -acodec copy audio.ogg. -ss is the start of the extracted audio timestamp, and -t is the audio duration. By using this command, you will be able to extract a certain portion of source audio file from video files using FFmpeg.
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 -ss 00:00:00 -t 00:00:00.0 -vn -acodec copy audio.ogg. -ss is the start of the extracted audio timestamp, and -t is the audio duration. For example, to extract 30 seconds of audio starting 2 minutes into the video, …
ffmpeg - How to extract aac audio from an mp4 file to …
https://askubuntu.com/questions/437798/how-to-extract-aac-audio-from-an-mp4-file-to-m4a
How can I extract the aac audio from an mp4 file? I tried with ffmpeg and -acodec copy but if i use mp4 as output it will still encode the video and I get the same file size. If I use m4a as output it will somehow still encode the video and I get almost the same filesize.
FFmpegでMP4やMKVをmux/demuxする - cBlog
https://yaritakunai.hatenablog.com/entry/2017/08/22/211000
ffmpeg -i video.mp4 -i audio.mp4 -map_metadata 0 -c copy output.mp4. こんなんでいいんじゃないでしょうか。 -map_metadataについて. 動画のメタデータ（作成日時やタグなど）を保持したい場合もあると思います。
ffmpegでmp4をdemuxしたりmuxしたり - Qiita
https://qiita.com/swdkn/items/dfac87b7c53a0967237a
そんな時に使えるツールの一つが、ffmpegです。. ・最初のトラックを分離. Copied! ffmpeg -i some_muxed.mp4 -map 0:0 -codec copy some_first_track.mp4. ・2番目のトラックを分離. Copied! ffmpeg -i some_muxd.mp4 -map 0:1 -codec copy some_second_track.mp4. こんな感じでコマンド実行すればdemux出来 ...
FFmpeg to the Rescue: Muxing Audio and Video Files ...
https://streaminglearningcenter.com/learning/ffmpeg-to-the-rescue-muxing-audio-and-video-files.html
ffmpeg -i video.mp4 -i audio.wav -c:v copy -c:a copy muxed.mp4. As before, FFmpeg converted the WAV file to AAC and produced the muxed file. So, FFmpeg seems pretty error-tolerant with this command. Of course, if you want to specify the bitrate (-b:a 128k), sample rate (-ar 48000), or channels (-ac 2, for stereo), you should specify the AAC codec (-c:a aac) as …
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