[pvrusb2] Jumpy Video in Mythtv

[Mark Goldberg]

On 6/25/07, Mark Goldberg <marklgoldberg at gmail.com> wrote:
> It is somewhat better but still is not smooth. Before it crashed and
> it has not since I built from your snapshot. Is the firmware a good
> one? (from pvrusb2_inf_24117.zip). I could not get one from the CD
> that came with it. I can capture a few seconds of video to a .mpg file
> and email it, if that is what you mean by a click. I can also boot to
> XP and see how it does with the driver it came from. Then, I could try
> to capture the firmware. Let me know what you suggest.
> I'm not uncomfortable modifying code and rebuilding kernel modules, so
> if there are any suggestions to help debug, i could do that too.
>
> Mark
>

Someone on the myth list suggested that the pal 576 vert height error
message might be of importance. i went into the myth setup and
selected NTSC explicitly instead of ATSC. ATSC stuff from the HD tuner
still works fine, and SD stuff from the pvrusb2 now seems to work
pretty fine now also. There are three minor issues left. The audio is
occasionally distorted on the peaks, and changing the audio level in
the sysfs interface does not seem to help. It may be that the input is
just too high and needs attenuation. Occasionally, the audio is
strange sounding, with a high pitched hiss and distortion. Stopping
the capture and reselecting seems to clear it up. Rarely, there is a
glitch in the mpeg stream but it clears up.

I turned off the filters since the directv output is already heavily
filtered. It seems to be a little sharper. It looks much better than
the capture from the SAA713X cards, and now all files are mpegs and
can play on anything.

Thanks for the driver!

Mark