[vlc-devel] Re: Matroska chapter fix

Steve Lhomme steve.lhomme at free.fr
Sat Feb 12 19:34:27 CET 2005

Steve Lhomme a écrit :
> The current VLC doesn't seek properly when using chapters. It's because 
> a flag was not set... Here is a fix for that well-known problem.
> It also incorporates support for more chapter elements, like hidden 
> chapters (used as seekpoints at various DVD levels).
> There is still a problem when seeking, it's only looking for the first 
> keyframe, not the most accurate one... (will be patched soon)

After investigating, it seems that it does seek on the correct keyframe. 
The problem is that it starts playback from that keyframe, even though 
the actual frame to seek to is much further in the stream...

Is there something like "pre-roll" in VLC that could be used ? Ie starts 
decoding from that keyframe (needed for clean seeking) but only 
rendering from the requested point. That's how it works in DirectShow...

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