[ivtv-users] Status of the B-Frame issue ?

[Hans Verkuil]

On Monday 10 November 2008 09:24:44 Alexander Pipelka wrote:
> Hi,
>
> Are there any news on the B-Frame issue.
> I sent a status log ~ 3 weeks ago.

Hi Alex,

I looked at it today and I could reproduce it. I also found what the 
difference is between the old and current ivtv driver. When you pass 
the B-frames to the card the API says that you should pass B+frames + 1 
to the card. So if there are 0 B-frames, then the number should be 0+1 
= 1. However, for some reason that does not seem to work for a 
cx2584x-based card. If I put in 0 instead of 1, then it works again.

What I don't know is if that really produces a stream without B-frames. 
Applying the attached patch should fix the problem you have, but I 
wonder if you can also test the presence of B/I/P frames and check that 
you get the right results (i.e. really 0 B-frames). I can also test it, 
but not easily and not until after two weeks from now.

Regards,

	Hans
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