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Detect: Raise meaningful errors when no decoder/encoder can be found

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This commit is contained in:
Ross Patterson 2019-08-09 17:30:28 -07:00
parent 69caa25e52
commit 8490da9fb6
1 changed files with 9 additions and 2 deletions
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11
ffmpeg/_detect.py
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@ -101,8 +101,15 @@ def detect_codecs(decoder, encoder, hwaccels=None, cmd='ffmpeg'):
hwaccels_data = detect_hwaccels(hwaccels, cmd=cmd)
build_codecs = hwaccels_data['codecs']
avail_decoders = build_codecs[decoder]['decoders']
avail_encoders = build_codecs[encoder]['encoders']
avail_decoders = build_codecs.get(decoder, {}).get('decoders', [])
avail_encoders = build_codecs.get(encoder, {}).get('encoders', [])
if not avail_decoders:
raise ValueError(
'Could not detect a supported decoder for {0!r}'.format(decoder))
if not avail_encoders:
raise ValueError(
'Could not detect a supported encoder for {0!r}'.format(encoder))
codecs_kwargs = []
default_kwargs = dict(output=dict(codec=avail_encoders[0]))