[vlc-devel] Re: VLC skips on "reduced" MPEG2-TS streams

Derk-Jan Hartman hartman at videolan.org
Wed Jan 17 11:44:44 CET 2007

On 17-jan-2007, at 8:13, Marian Durkovic wrote:

>>> Yes and this is perfectly legal. It is also quite common in the  
>>> field,
>>> so if there was such a bug I think we'd have noticed before. Any  
>>> chance
>>> to have a dump, or satellite coordinates ?
>> N24 news channel on Astra 1H (12480 V) or anything in that transpoder
>> could be taken as an example.
>> The debug shows quite big variations in time offsets and pictures
>> skipped before decoding:
> I've uploaded raw TS capture into:
> ftp://streams.videolan.org/incoming/skipping_mpeg2_ts/n24.ts
> The timing problems disappear when I set --file-caching to 600 msec  
> or above.
> Such setting is not needed on any other MPEG2 stream we're using
> (including HDTV ones).
> Any ideas about the reason - wrong stream? default 300 msec file- 
> caching
> too low? synchro bug? other?

Interleaving of the A/V data wasn't done with the advised settings.  
This is a bad stream, 300ms really should be enough.
Meeuh ? Don't they advise something like 60ms max of interleaving  
space ?


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