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audio types – FFmpeg
https://trac.ffmpeg.org/wiki/audio%20types
ffmpeg -f u16le -ar 44100 -ac 1 -i input.raw output.wav The default for muxing into WAV files is pcm_s16le. You can change it by specifying the audio codec and using the WAV file extension: ffmpeg -i input -c:a pcm_s32le output.wav which will create a WAV file containing audio with that codec (not a raw file).
flv - Can ffmpeg convert audio to raw PCM? If so, how ...
https://stackoverflow.com/questions/4854513/can-ffmpeg-convert-audio-to-raw-pcm-if-so-how
ffmpeg -y -i input.mp4 -acodec pcm_s16le -f s16le -ac 1 -ar 16000 output.pcm you can also use it to convert mp3 to pcm. ffmpeg -y -i input.mp3 -acodec pcm_s16le -f s16le -ac 1 -ar 16000 output.pcm key params means:-f s16le … PCM signed 16-bit little-endian samples -ac 1 … 1 channel (mono) -ar 16000 … sample rate 16000Hz
FFmpeg Codecs Documentation
https://ffmpeg.org/ffmpeg-codecs.html
Use ffmpeg to convert an audio file to VBR AAC in an M4A (MP4) container: ffmpeg -i input.wav -codec:a libfdk_aac -vbr 3 output.m4a Use ffmpeg to convert an audio file to CBR 64k kbps AAC, using the High-Efficiency AAC profile:
ffmpeg, dramatic decrease in size from camera videos.
https://www.linuxquestions.org/questions/linux-general-1/ffmpeg-dramatic-decrease-in-size-from-camera-videos-660241/
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copy-mode extract of audio from youtube flv video
https://www.linuxquestions.org/questions/linux-desktop-74/copy-mode-extract-of-audio-from-youtube-flv-video-508026/
'ffmpeg -i inputfile.flv -f mp3 -vn -acodec copy ouputfile.mp3' That should do it for most files. Apparently there are some microphone-recorded .flv files that use a proprietary codec that doesn't have any open source support. I don't know how common those are in the wild.
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