Audacity Forum

Have you tried it the "normal way" (GUI)? I've never used the command line with Audacity but "Custom FFmpeg Export" works for me. [EDIT] - Or maybe not... I got a playable file, but I couldn't select the bit depth and MediaInfo says I got a 16-bit, 44.1Khz, stereo ...

... export a vinyl album recorded as a single WAV file to multiple ALAC files using the following command line "C:\Program Files (x86)\Audacity\ffmpeg\ffmpeg.exe" -i - -acodec alac "%f" Unfortunately it fails with the following error "C:\Program Files (x86)\Audacity\ffmpeg\ffmpeg.exe" ...

We do have a related known and logged bug

https://bugzilla.audacityteam.org/show_bug.cgi?id=1184
Mac: Custom FFmpeg Export and (external program): unwanted "NoOverwritePrompt" dialog and file

Peter

... version via the Audacity website: https://www.audacityteam.org/download/windows/ You may be able to import the audio from M4A files if you install FFmpeg. See: https://manual.audacityteam.org/man/installing_and_updating_audacity_on_windows.html#winff

... and Audacity has to deal with that. Some of the correction tools work entirely in memory, so there's no hard drive to fall back on. If you install FFMpeg, Audacity will open many "foreign" sound formats including videos, but you need a video editor to smash it all back together after ...

... Are you trying to reach the built-in soundcard? Is there a built-in soundcard? Most of those messages are normal for a system that does not have FFMpeg installed. Koz

... MIDI. I followed the instructions and I couldn't do it, either. This may be a developer question. Is this export menu item a mistake? Is this an FFMpeg mismatch? Instructions like this never tell you which Audacity version they're using—or at least I didn't see it. You can also get rolling post ...

... a new build folder 3) In the new build folder, run this configuration command: ../configure --with-lib-preference="local system" --with-ffmpeg="system" --disable-dynamic-loading --with-mod-script-pipe 2>&1 | tee build-log.txt That will create a file "build-log.txt" ...

... format (WAV or FLAC) to prevent unnecessary multiple generations of lossy encoding, even if you eventually want a lossy format. (VLC also uses FFmpeg but it may use a different version/variation or other additional CODECs, or something could be messed-up with your Audacity-FFmpeg installation.)

... Even though you "know" it's an MP4, I still recommend checking the file with MediaInfo. If it was a normal-valid MP4 file, Audacity with FFmpeg should be able to open it. (I don't know anything about OBS.)