|Version 2 (modified by rogerdpack, 5 years ago) (diff)|
Raw audio in FFmpeg can take several different "forms"
- pcm_s16le PCM means "traditional wave like format" (raw bytes, basically). 16 means 16 bits per sample, le means "little endian", s means "signed"
- pcm_s32le same but 32 bits per sample.
You can see a list, like:
$ ffmpeg -formats | grep PCM ffmpeg version N-44123-g5d55830 Copyright (c) 2000-2012 the FFmpeg developers DE alaw PCM A-law DE f32be PCM 32-bit floating-point big-endian DE f32le PCM 32-bit floating-point little-endian DE f64be PCM 64-bit floating-point big-endian DE f64le PCM 64-bit floating-point little-endian DE mulaw PCM mu-law DE s16be PCM signed 16-bit big-endian DE s16le PCM signed 16-bit little-endian DE s24be PCM signed 24-bit big-endian DE s24le PCM signed 24-bit little-endian DE s32be PCM signed 32-bit big-endian DE s32le PCM signed 32-bit little-endian DE s8 PCM signed 8-bit DE u16be PCM unsigned 16-bit big-endian DE u16le PCM unsigned 16-bit little-endian DE u24be PCM unsigned 24-bit big-endian DE u24le PCM unsigned 24-bit little-endian DE u32be PCM unsigned 32-bit big-endian DE u32le PCM unsigned 32-bit little-endian DE u8 PCM unsigned 8-bit
Basically these represent raw audio types.
Other types include
- pcm_bluray, which can be at least 24 bit, possibly other bit rates.
The default for .wav files is to use pcm_s16le, you can change it like:
ffmpeg -i input -acodec pcm_s32le yo.wav
and thus store other types of wave formats in there.