[mythtv-users] HDTV on Myth -- is it a "myth?"
doug at ties.org
Sun Oct 10 23:09:56 UTC 2004
Joe Barnhart wrote:
> Doug -- Are you outputting to a 1920x1080i device?
Yes. I can use either a 1920x1080i mode with no deinterlacing, or
1920x540p with bob deinterlacing; they look basically identical until
you activate a zoom mode (at which point bob looks better since the
interlaced mode is no longer line-for-line).
> I also see severe
> problems with 720p input streams. They play at half
> speed, with unlistenable sound stuttering, with both
> Xv and XvMC on my system.
Have you read the recent ALSA discussions on the -dev list?
> Given the potential advantage of hardware-assisted
> MPEG decoding, I'm rather surprised that few people
> (and no developers?) are using XvMC.
XvMC is a PITA because of the way it barely fits into the Myth video
output architecture. You can't apply filters; you have to deal with the
fact that there are fewer in-flight video buffers (frames); seeking is
more difficult because the decoder has to have all the reference frames
for non-I frames, etc. Software decoder is just more flexible.
-------------- next part --------------
A non-text attachment was scrubbed...
Size: 256 bytes
Desc: OpenPGP digital signature
Url : http://mythtv.org/pipermail/mythtv-users/attachments/20041010/f97de8f8/signature.pgp
More information about the mythtv-users