Video:0kB audio:4841kB global headers:0kB muxing overhead 2.573264% Input #0, aac, from 'the_reaper_stereo_44.1k.aac': Estimating duration from bitrate, this may be inaccurate Video:0kB audio:4882kB global headers:0kB muxing overhead 1.868102%įfmpeg -i the_reaper_stereo_44.1k.aac -y the_reaper_stereo_44.1k.mp4 Output #0, adts, to 'the_reaper_stereo_44.1k.aac': auto-inserting filter 'auto-inserted resampler 0' between the filter 'src' and the filter 'aformat' Guessed Channel Layout for Input Stream #0.0 : stereo $ ffmpeg -i the_reaper_stereo_44.1k.wav -strict experimental -acodec aac -y the_reaper_stereo_44.1k.aac

Red Hat Enterprise Linux Server release 5.8 (Tikanga) Using mp3 source went fine regardless of output audio codec.įfmpeg version N-41113-ge7cb161 Copyright (c) 2000-2012 the FFmpeg developersīuilt on 19:26:04 with gcc 4.1.2 20080704 (Red Hat 4.1.2-52)Ĭonfiguration: -enable-gpl -enable-libmp3lame -enable-libtheora -enable-libvo-aacenc -enable-libvorbis -enable-libvpx -enable-libx264 -enable-version3 The results were consistent, using aac as source broke my mp4 audio regardless of output audio codec. mp4 in different variations (without parameters to conserve audio or with the parameters above to change audio stream).

aac (-strict experimental -acodec aac) and. wav file as my source, from which I produced a.

I have used Blue Öyster Cult - Don't Fear the Reaper song in stereo 16 bit pcm 44,100Hz. mp4 (regardless of output audio codec) files, audio is broken (different effect depending on player).

Ffmpeg mp4 aac