Update:
Regarding #5, I have found that I can repeatably get
the crashing behavior whenever I use libmpeg2 for
decoding in MythTV. I can do this by playing, say,
30s of liveTV and hiting the rewind button once. It
rewinds for a second or two, goofs up the colors, and
then crashes, with a great many "prebuffering pauses"
in the mythfrontend log and an occasional "waited too
long for a buffer".
Turning off "use libmpeg2" prevents this particular
crashing behavior. I haven't verified the long-term
stability, but for the short term I can't get it to
crash with ffw'ing/rew'ing when libmpeg2 is turned off
(ffmpeg on). Which is a shame because I get a little
bit of tearing (like the vsync being off or the frame
updating not being quite fast enough) when I use
ffmpeg; it looks better with libmpeg2.
In summary:
libmpeg2 -> no tearing ("stairing"?), yes on crashing
ffmpeg -> yes tearing, no on crashing (so far)
So, at least for me, that leaves
#1 Still unsolved (no EPG visuals during live TV)
#2 "Bob" deinterlacing looks awful and hangs the
system. - kernel and linear blend are OK. Probably
not that important.
#3 Solved - using gui.osd_use_unscaled:0 shows the OSD
just fine in xine.
#4 Unsolved, but it's presumably because downscaling
yuv isn't implemented yet.
#5 Seems to be resolved, at least for now. (turn
libmpeg2 off)
#6 Solved - according to J. Harvey, not important.
Thank you for all your great work.
--- John Harvey <[EMAIL PROTECTED]> wrote:
> Can you send me your xorg.conf so I can see if
> there's something there
> causing 1 & 3.
> Other answers/questions below
>
> > -----Original Message-----
> > From: [EMAIL PROTECTED]
> [mailto:ivtv-devel-
> > [EMAIL PROTECTED] On Behalf Of
> [EMAIL PROTECTED]
> > Sent: 20 June 2005 21:32
> > To: [email protected]
> > Subject: Re: [ivtv-devel] [PATCH] YUV improved
> quality and NTSC
> >
> > Thank you. Very nice. NTSC playback looks great.
> > Anti-aliased fonts, overall pretty responsive
> system.
> > TV playback uses 13-15% CPU. (P4 2.4GHz, MythTV
> > 0.18.1, kernel 2.6.8) Rewinding and fast
> forwarding
> > appear more responsive and don't exhibit some of
> the
> > fubars that you get when doing it with the
> decoder.
> >
> > Some quirks/bugs:
> >
> > 1) Myth's programming guide no longer appears
> while
> > watching live TV. It runs, but it's not rendered
> on
> > the screen. (As if alpha==0.)
> >
> > 2) Linear Blend and Kernel de-interlacing work
> well (I
> > think Kernel is slightly better), but trying "Bob"
> > once hanged my system hard.
> >
> > 3) OSD on xine does not show up. Controls respond
> > fine, but the OSD elements such as "Volume" or
> > "Position in Stream" no longer appear on the
> screen.
> > (It's now an "Off"-Screen Display? ;)
> >
> > 4) Video resizing in xine does not work. I.e. I
> can't
> > change between "anamorphic", "4:3", "square",
> "16:9",
> > etc.
> >
> What size recording are you playing. Scaling up
> works. Scaling down probably
> doesn't. You could send me the stuff generated in
> /var/log/messages when you
> start xine with each of these options.
>
> > 5) Occasionally, live TV in Myth hangs. It seems
> to
> > coincide with a very large number (many hundreds)
> of
> > "prebuffering pause" messages in mythfrontend.log
> > (~100 per second), interspersed with a few
> >
> > "Timed out waiting for free video buffers."
> >
> > messages until it crashes. There are no
> corresponding
> > errors in /var/log/messages when this happens, as
> far
> > as I can tell.
> >
> > 6)Additionally, I get this peculiar message in
> > mythfrontend's log when I start live TV or a
> > recording:
> >
> > 2005-06-20 10:52:26.709 Using XV port 52
> > X Error: BadMatch (invalid parameter attributes) 8
> > Major opcode: 140
> > Minor opcode: 14
> > Resource id: 0x165
> > 2005-06-20 10:52:26.712 Couldn't get the color key
> > color, and we need it.
> > You likely won't get any video.
> >
>
> This makes sense but isn't a problem with the way
> the xv driver works with
> ivtv.
>
> > There don't seem to be any error messages in
> > Xorg.1.log, however.
> >
> > I used the precompiled ivtvdev that was in
> > ivtv-0.3.6o/utils. Let me know if you need more
> > information.
> >
> forge.net/lists/listinfo/ivtv-devel
>
>
>
>
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