Hans,
The older version of the driver supported 0 B-Frames (I'm 100% sure).
I need this for very fast frame navigation in a MPEG stream.
It worked with the driver included in Ubuntu Edgy (I think it was
version 0.7.4 of the driver).
Unfortunately I updated that machine to Ubuntu Hardy and the problem
appeared.
Well, I could reinstall an other machine with Ubuntu Edgy to *verify*
that the 0 B-Frame thing works, but I already know this, ...
Please help !
Alex
Hans Verkuil schrieb:
On Tuesday 18 November 2008 08:26:16 Levente Novák wrote:
Hi,
Is there any advance on the topic of B-frames problem on PVR-150s and
PVR-250s? A few days ago I tested Hans' patch and while my PVR-150
MCE does now save a non-zero length stream if th number of B-frames
is set to 0, this stream has not 0 but 1 B-frames per P-frames.
Beside this, even if it seems to work OK with 1 or 2 B-frames, the
stream is choppy and unusable with 3 or 4.
My patch fixes the zero-length stream issue, but that's all. I don't
believe it ever gave you a stream with 0 B-frames. I suspect that the
firmware forces a minimum of 1 B-frame.
If you can prove that the older driver actually gave you 0 B-frames,
then I'll take another look. But I believe that the conclusion simply
is that you need a minimum of 1 B-frame.
Regards,
Hans
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