Audacity Forum

... detect the codecs, rather than having a hard coded list of codecs. A hard coded list of codecs has the downside that if the user updates FFmpeg so that it supports more formats, Audacity would not be able to access those new codecs because they are not in "the list" of supported ...

... probably not compiled in." The code then looks to see if the codec + options can open. Linux / Mac don't get this far. The Windows version of FFmpeg does get this far because it has the codec, but it doesn't work - the codec can't be opened. Hence the error "Can't open audio codec". ...

On Mac I don't get any Codecs offered (by default) with the AMR format in Custom FFmpeg export

But if I just press ahead with a blank Codec and try the export I get the same error message that you get on Linux.

Both with 2.3.2 and RC001 for 2.3.3

Peter

On Linux I get a more meaningful error message:

We know that there are several (maybe many) combinations of Format and Codec that so not worg in Custom FFmpeg Export in Audacity. Very few are documented or logged as bugs (Opus is one of the few that is) One day when I am really bored and have a lot of time on my hands I ...

The first Codec yields

The second codec is similar but differs by the 1 at the end

After pressing OK they both yield
Peter

I tried using Custom FFmpeg to export as AMR (on W10) and neither of the two offered Codecs (libopencore_amrbb or libvo_amrwbenc) work.

I get error messages on attempting this.

Peter.

I had the FFmpeg library before the update and was able to export audio to AMR (it was also included in the File Type dropdown whenever I'd export audio). As far as I'm aware, Audacity has never had built-in support for exporting ...

As an update, I tried resetting Audacity and attempted again to export mp3 audio as AMR. I got a similar message that reads as follows: FFmpeg Error FFmpeg cannot find audio codec 0x12000. Support for this codec is probably not compiled in. then Message Unable to export Not sure if this is ...

Trebor wrote: ↑

Tue Oct 29, 2019 1:02 pm

waxcylinder wrote: ↑

Tue Oct 29, 2019 8:25 am

For MP3 export you need LAME and not FFmpeg.

oops my bad

Haha - I make plenty of "bad"

P.