[vdr] error decompressing frame for Astra HD+

Igor goga777 at bk.ru
Sat May 10 12:27:24 CEST 2008


> > what about your VDR system ? Have you the same errors ?
> 
> Well, my P4 2.8 GHz HT system is not powerful enough to play this 
> stream in real time. 

yes, I have the same CPU
CPU: Intel(R) Pentium(R) 4 CPU 3.00GHz (Family: 15, Model: 3, Stepping: 4)

>Hence, I regularly see VDR issue CLEARs 
> after which such messages are normal.

sorry, what do you mean "VDR issue CLEARs" ?

 
> > btw , I have uploaded one sample from AstraHD with the size 10 MB
> > 
> > Astra.pes  
> > http://www.zshare.net/download/1179707004348a83/
> > 
> > you can try it
> 
> As written above, I had to slow down replaying:
> 
> 	xine -S slow2 astra.pes#demux:mpeg_pes
> 
> This only gives me messages for two B pictures, i. e. you're cut 
> VDR recording shows a picture structure like that:
> 
> 	IBBP....
> 
> In MPEG2, one (VDR) would have set the broken link flag for such 
> a group of pictures as the B pictures cannot be decoded without a 
> reference picture from the previous GOP.
> 
> But H.264 doesn't have a broken link flag, so that's why FFmpeg 
> gives messages like the following:
> 
> [h264 @ 0xac236490]B picture before any references, skipping
> [h264 @ 0xac236490]decode_slice_header error
> [h264 @ 0xac236490]B picture before any references, skipping
> [h264 @ 0xac236490]decode_slice_header error

so, could you give some resume about this errors ? 
is it ffmpeg/provider/vdr/driver problem ? or no any problem ?

Igor




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