Also, this is a good page on audio/ video containers and ffmpeg. Apart from libmp3lame (or mp3) I could have also used the following audio codecs: vorbis (for ogg), aac, flac, and wma.īefore concluding, here’s a link to ffmpeg’s documentation (for all the command-line switches etc). -ab 320k => bit-rate of 320 kb/s (if I don’t specify this the bit-rate will be 128 kb/s for mp3)Įssentially, instead of just copying the audio codec you convert it.
-ar 44100 => sammple rate 44100 Hz (CD quality) (note this is same as the input, so is an optional switch).-ac 2 => two channels (stereo) (note this is same as the input, so is an optional switch).I specify the audio codec via -acodec libmp3lame. Stream #0:0(und): Audio: aac (LC) (mp4a / 0圆134706D), 44100 Hz, stereo, fltp, 253 kb/s (default)Īt least one output file must be specifiedĬ : \ > ffmpeg -i "input file.m4a" -vn -ac 2 -ar 44100 -ab 320k -acodec libmp3lame "output.mp3"
Ibrtmp -enable-libschroedinger -enable-libsoxr -enable-libspeex -enable-libtheora -enable-libtwolame -enable-libvidstab -enable-libvo-aacenc -Įnable-libvo-amrwbenc -enable-libvorbis -enable-libvpx -enable-libwavpack -enable-libwebp -enable-libx264 -enable-libx265 -enable-libxavs -enaīle-libxvid -enable-lzma -enable-decklink -enable-zlib
Libilbc -enable-libmodplug -enable-libmp3lame -enable-libopencore-amrnb -enable-libopencore-amrwb -enable-libopenjpeg -enable-libopus -enable-l Tls -enable-iconv -enable-libass -enable-libbluray -enable-libbs2b -enable-libcaca -enable-libfreetype -enable-libgme -enable-libgsm -enable. Ffmpeg version N-68788-g37b35fe Copyright (c) 2000-2014 the FFmpeg developersĬonfiguration: -enable-gpl -enable-version3 -disable-w32threads -enable-avisynth -enable-bzlib -enable-fontconfig -enable-frei0r -enable-gnu
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