non-fatal errors causing mp3-to-svg to fail #3
Description
I tried generating waveforms for AudioFile with id=1630394 (Koningskerk Deventer). This failed because ffmpeg (on app-worker-ska which is version 2.2.3) shows some errors. These errors are non-fatal (hence the 0 (zero)) return code.
Line 31 in a148847
Here the promise is rejected when the spawned ffmpeg process has output on STDERR.
This causes the process to fail even thought this is not a fatal error.
$ ffmpeg -v error -i /tmp/test.mp3 -c:a copy -user-agent 'KDGM' -y /tmp/test-remux.mp3
[mp3 @ 0x35cca20] Cannot read BOM value, input too short
[mp3 @ 0x35cca20] Error reading frame author, skipped
[mp3 @ 0x35cca20] Incorrect BOM value
[mp3 @ 0x35cca20] Error reading frame broadcasting_app, skipped
[mp3 @ 0x35cca20] Incorrect BOM value
[mp3 @ 0x35cca20] Error reading frame operation_system, skipped
[mp3 @ 0x35cca20] Incorrect BOM value
[mp3 @ 0x35cca20] Error reading frame presetname, skipped
[mp3 @ 0x35cca20] Incorrect BOM value
[mp3 @ 0x35cca20] Error reading frame creationdate, skipped
[mp3 @ 0x35cca20] Incorrect BOM value
[mp3 @ 0x35cca20] Error reading frame audiochannels, skipped
[mp3 @ 0x35cca20] Incorrect BOM value
[mp3 @ 0x35cca20] Error reading frame audioinputvolume, skipped
[mp3 @ 0x35cca20] Incorrect BOM value
[mp3 @ 0x35cca20] Error reading frame audiodevice, skipped
[mp3 @ 0x35cca20] Incorrect BOM value
[mp3 @ 0x35cca20] Error reading frame avcprofile, skipped
[mp3 @ 0x35cca20] Incorrect BOM value
[mp3 @ 0x35cca20] Error reading frame avclevel, skipped
[mp3 @ 0x35cca20] Incorrect BOM value
[mp3 @ 0x35cca20] Error reading frame videokeyframe_frequency, skipped
[mp3 @ 0x35cca20] Incorrect BOM value
[mp3 @ 0x35cca20] Error reading frame videodevice, skipped
[mp3 @ 0x35cca20] Cannot read BOM value, input too short
[mp3 @ 0x35cca20] Error reading frame keywords, skipped
[mp3 @ 0x35cca20] Cannot read BOM value, input too short
[mp3 @ 0x35cca20] Error reading frame rating, skipped
[mp3 @ 0x35cca20] Incorrect BOM value
[mp3 @ 0x35cca20] Error reading frame streamIdentifier, skipped
ubuntu@app-worker-ska:/var/rails/kdgm/current$ echo $?
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