[vlc-devel] [PATCH] MKV: don't update the playback PTS from unused tracks

[Steve Lhomme]

On 02/03/2015 12:11, Rémi Denis-Courmont wrote:
> Le 2015-03-02 14:02, Steve Lhomme a écrit :
>> Fixes #11847
>>
>> This file has bad interleaving and shows the progress of broken
>> tracks that are not in use.
>> With this patch we only show the progress for the track(s) in use
>
> In my understanding, the demuxer should only use the ES state as an
> optimization. This is especially useful for filtering with RTSP, DVB or
> MMS.
>
> Having the timeline depend on the selected track seems like a terrible
> idea for somewhat obvious reasons.

Yes, but this is a global value that's kept during playback. Right now 
it can even go backward in time if a packet with an old timestamp is 
encountered. And that's the value to report where we are during playback.

If the user selects another track it's going to be bogus all of a 
sudden. The value will stay as it is until new (selected) packets with 
new timestamps are encountered. The only case it wouldn't work is if the 
user selects no track to play at all. But then, we don't care about 
timestamps...