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# Mplayer can't find the needed details. Let's try again, forcing the use
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# of the ffmpeg lavf demuxer
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my $altdata = `$program $idargs -demuxer lavf '$file' 2>/dev/null`;
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($info{'width'}) = $altdata =~ m/^ID_VIDEO_WIDTH=0*([1-9]\d*)/m;
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($info{'height'}) = $altdata =~ m/^ID_VIDEO_HEIGHT=0*([1-9]\d*)/m;
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($info{'audio_bitrate'}) = $altdata =~ m/^ID_AUDIO_BITRATE=0*([1-9]\d*)/m;
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($info{'audio_sample_rate'}) = $altdata =~ m/^ID_AUDIO_RATE=0*([1-9]\d*)/m;
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($info{'audio_channels'}) = $altdata =~ m/^ID_AUDIO_NCH=0*([1-9]\d*)/m;
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($info{'aspect'}) = $altdata =~ m/^ID_VIDEO_ASPECT=0*([1-9]\d*(?:[\.\,]\d+)?)/m;