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Nevcairiel / LAVFilters

LAV Filters - Open-Source DirectShow Media Splitter and Decoders
GNU General Public License v2.0
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Music play fast forward problem #503

Closed Coresi7 closed 1 year ago

Coresi7 commented 1 year ago

Hi there, here's a music demo, which play on WMP is fine, but play with MPC-HC with LAV Audio decoder, it will play extremely fast like I press the FF button. Is there a plan to fix this? LAV Filter version: 0.76.1.3 7 AND 5 - Ascension.zip

clsid2 commented 1 year ago

Speed is normal here. But there is some glitches at the start.

FFmpeg is detecting some issues with the file, so there is possibly something wrong with it. MediaInfo also does not recognize it, and VLC fails to play completely.

[flac @ 0000000000465f40] Format flac detected only with low score of 1, misdetection possible!
[flac @ 0000000000467980] invalid sync code
[flac @ 0000000000467980] invalid frame header
[flac @ 0000000000467980] decode_frame() failed
Coresi7 commented 1 year ago

Speed is normal here. But there is some glitches at the start.

FFmpeg is detecting some issues with the file, so there is possibly something wrong with it. MediaInfo also does not recognize it, and VLC fails to play completely.

[flac @ 0000000000465f40] Format flac detected only with low score of 1, misdetection possible!
[flac @ 0000000000467980] invalid sync code
[flac @ 0000000000467980] invalid frame header
[flac @ 0000000000467980] decode_frame() failed

It's spooky.... Considering the fact that Windows Media Player will be fine for this, of course WMP should detect some glitches at the start but playback speed is fine, is there any work around for this? For example, ignore some of the first frames?

clsid2 commented 1 year ago

It could be a bug in FFmpeg. You need to wait until nevcairiel has time to comment on this.

Nevcairiel commented 1 year ago

The behavior looks fine to me, and it also plays fine here. But the file is somehow rather screwed up. It does not have a flac file header, instead it starts with a huge empty ID3 block, and the flac frame information seems to refer to wrong timestamps.