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Can't export to MP3 #26

Closed neildarlow closed 2 years ago

neildarlow commented 3 years ago

Hi,

I'm using Ardour 6.7.0 with ALSA as the audio engine. I can record and playback sound without issue.

When attempting to export to MP3 (using the Standard MP3, session rate format) the export fails with the following in the log:

2021-06-09T10:22:52 [INFO]: Encode command: { /app/bin/ffmpeg_harvid -f f32le -acodec pcm_f32le -ac 2 -ar 48000 -i pipe:0 -y -q:a 2 -metadata comment=Created with Ardour /var/home/neil/Audio/test/export/session.mp3 } 2021-06-09T10:22:52 [ERROR]: Export ended unexpectedly: Exception thrown by AudioGrapher::CmdPipeWriter: Target encoder process is not running

neildarlow commented 3 years ago

I did some digging on this and, checking the capabilities of ffmpeg_harvid, it seems to have decoding and muxing support for MP3 but I don't see any evidence of MP3 encoding support. Here's some output (ffmpeg copyright and library versions omitted):

[📦 org.ardour.Ardour ~]$ ffmpeg_harvid -decoders |grep -i mp3 A....D mp3float MP3 (MPEG audio layer 3) (codec mp3) A....D mp3 MP3 (MPEG audio layer 3) A....D mp3adufloat ADU (Application Data Unit) MP3 (MPEG audio layer 3) (codec mp3adu) A....D mp3adu ADU (Application Data Unit) MP3 (MPEG audio layer 3) A....D mp3on4float MP3onMP4 (codec mp3on4) A....D mp3on4 MP3onMP4

[📦 org.ardour.Ardour ~]$ ffmpeg_harvid -encoders |grep -i mp3

[📦 org.ardour.Ardour ~]$ ffmpeg_harvid -muxers |grep -i mp3 E mp3 MP3 (MPEG audio layer 3)

Am I missing something here or is the lack of MP3 encoder a likely cause of the failure?

srahman53171618 commented 2 years ago

Just wanted to add, same issue here

hfiguiere commented 2 years ago

Sorry this stuck under my radar. It shoud be fixed now.

srahman53171618 commented 2 years ago

Thank you so much.