[mythtv] Issue with PiP and jerky video

[Mike Benoit]

I just installed a second tuner about 15minutes ago and discovered this
same problem.

But as soon as I bring up the PiP window, video and sound in the main
window becomes jerky. If I pause either window for a bit, the other
plays perfect. When I un-pause, it goes jerky for a second or two, then
both windows play perfect for about 5-10secs, then they both go back to
jerky motion/sound.

My Setup:

XP2400
256mb ram
WinFast TV2000 capture cards (2)
Geforce4 MX440 TV out.
Recording 640x480, bitrate 3000, Max: 1 Min:4 Diff: 3

MythTV 0.8

Here is a vmstat output while PiP is jerky. As you can see, lots of idle
CPU.

[root at mythtv dev]# vmstat 1
procs -----------memory---------- ---swap-- -----io---- --system--
----cpu----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in    cs us sy
id wa
 6  0   9088  98176  10996  34428    0    3    28   289  359   953 29  1
70  0
 8  0   9088  96948  11084  35292    0    0     0  1044  571  2108 55  2
43  0
14  0   9088  96176  11144  36076    0    0     0   976  558  2051 50  1
50  0
 7  0   9088  95284  11216  36804    0    0     0   880  563  2075 49  0
51  0
14  0   9088  94412  11340  37560    0    0     0   984  574  2063 49  1
50  0
18  0   9088  93712  11408  38296    0    0     0   880  568  2097 56  1
43  0
 6  0   9088  92580  11480  39252    0    0     0   972  561  2087 50  0
50  0
13  0   9088  91636  11556  40112    0    0     0  1052  576  2106 55  2
43  0
 7  1   9088  90760  11680  40868    0    0     0   996  571  2125 58  0
42  0
12  0   9088  89840  11756  41664    0    0     0   952  587  2071 54  2
44  0
 8  0   9088  89184  11844  42368    0    0     0   996  568  2050 40  2
58  0
14  0   9088  88208  11916  43140    0    0     0   740  555  2048 54  0
46  0
 9  0   9088  87500  11984  43820    0    0     0   952  557  2069 41  2
57  0


On Sat, 2003-04-12 at 13:53, Christian Hoenig wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Hi,
> 
> I just found something strange.
> When I start using PiP my main video starts becoming jerky about all 3 to 5 
> seconds. Then, when I switch focus to the PiP video ('b'), pause it for a 
> second or so, the main video plays perfect. I then can switch the channels of 
> the main video (keeping the PiP window up) without having that jerky video 
> again. But as soon as I switch channels in the PiP window the problem 
> reapears... until pausing it for a second or so.
> This happens while playing the video locally and remotely!
> 
> My Setup:
> AMD XP2k+
> G400 (G550 on the remote one)
> recording at 640x480 with mpeg4 with a bitrate of 3300.
> 
> Can anybody confirm that behavior?
> 
> take care, have fun
> /christian
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> 
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-- 
Mike Benoit <ipso at snappymail.ca>