[mythtv-users] 0.19, XvMC, and Prebuffer pause

[Michael Haan]

On 2/25/06, Michael Haan <michael.haan at gmail.com> wrote:
>
> On 2/25/06, Steve Malenfant <smalenfant at gmail.com> wrote:
> >
> > So, I've tried recompiling with static buffers of 65384KB.  That
> > didn't work.  There is something about the 1080i stream of terminator
> > which makes it work just great.
> >
> > If I play the video with no audio (audio device=none), every single
> > channel works without any prebuffering.  I was expecting that because
> > the problem seems to be related to a sync with audio and video.  Not
> > sure why video is always a few frames in advance on the audio, but
> > that's what causing the prebuffering pause it seems.
> >
> > Something isn't right in 0.19.
> >
> > Steve M.
> >
> > On 2/24/06, Steve Malenfant <smalenfant at gmail.com> wrote:
> > > So I've compared a few programs, Terminator 3, Olympic and American
> > Idol.
> > > There is huge difference in the number of buffer allocated.  I'll
> > include
> > > what I think is relevant here, but I'll save the log for later.  The
> > only
> > > one that play fine is Terminator 3 which uses 65384 KB
> > buffers.  That's
> > > actually the only stream that works on my box right now.  So is it
> > possible
> > > that this buffer management isn't working properly or the buffer
> > aren't
> > > suited right?  Who can bring the attention of this to one of the
> > developper
> > > (if not reading, and if my info is relevant)?
> > >
> > >  Terminator 3(1080i, WGCL, perfect playback, 0.18 recording) :
> > >  stream: start_time: 38308.760 duration: 8335.827 bitrate=18421 kb/s
> > >  2006-02-24 20:31: 52.445 detectInterlace(Detect Scan, Detect Scan,
> > 29.97,
> > > 1088) ->Interlaced Scan
> > >  2006-02-24 20:31:52.445 Interlaced: Interlaced Scan  video_height:
> > 1088
> > > fps: 29.97
> > >  2006-02-24 20:31:52.447
> > > RingBuf(myth://192.168.11.24:6543/1046_20060219210000.mpg):
> > > CalcReadAheadThresh(65384 KB)
> > >                           -> threshhold(2650 KB) min read(32 KB) blk
> > > size(512 KB)
> > >
> > >  Olympic (1080i, NBC, stutters, 0.19 recording) :
> > >  stream: start_time: 64275.281 duration: 14176.624 bitrate=15627 kb/s
> > >  2006-02-24 20:44:36.735 detectInterlace(Detect Scan, Detect Scan,
> > 29.97,
> > > 1088) ->Interlaced Scan
> > >  2006-02-24 20:44: 36.735 Interlaced: Interlaced Scan  video_height:
> > 1088
> > > fps: 29.97
> > >  2006-02-24 20:44:36.736
> > > RingBuf(myth://192.168.11.24:6543/1111_20060223200400.mpg):
> > > CalcReadAheadThresh(16384 KB)
> > >                           -> threshhold(856 KB) min read(32 KB) blk
> > size(256
> > > KB)
> > >
> > >
> > >  American Idol (720p, FOX, stutters, 0.19 recording) :
> > >
> > >  stream: start_time: 65694.620 duration: 3605.606 bitrate=12973 kb/s
> > > 2006-02-24 20:33:23.624 detectInterlace(Detect Scan, Detect Scan,
> > 59.9401,
> > > 720) ->Progressive Scan
> > >  2006-02-24 20:33:23.625 Interlaced: Progressive Scan  video_height:
> > 720
> > > fps: 59.9401
> > >  2006-02-24 20:33:23.632
> > > RingBuf(myth://192.168.11.24:6543/1051_20060223200000.mpg):
> > > CalcReadAheadThresh(15384 KB)
> > >                           -> threshhold(819 KB) min read(32 KB) blk
> > size(256
> > > KB)
> > >
> > >  Steve M.
> > >
> > > On 2/24/06, Ray Lischner < linux at tempest-sw.com> wrote:
> > > > On Friday 24 February 2006 11:13 am, Joe Silver wrote:
> > > >
> > > > > The pauses aren't so much pauses as they are momentary (like
> > 1/10th of
> > > > > a second) blip in the audio.  Maybe the video skips too, but it's
> > much
> > > > > easier to notice the audio.
> > > >
> > > > Another reason why I may not have noticed anything so far. A minor
> > blip
> > > > in the sound of skis slicing through snow would not draw my
> > attention.
> > > > Once I can clear the Olympics off my disk drive, I'll try to pay
> > > > attention and see whether I can detect the prebuffering pauses.
> > > > --
> > > > Ray Lischner
> > > > _______________________________________________
> > > > mythtv-users mailing list
> > > > mythtv-users at mythtv.org
> > > > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
> > > >
> > >
> > >
> > _______________________________________________
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> >
>
>
> I upgraded to the latest ATrpms as of last night and while I'm not
> promising anything, initial results indicate my issues are gone.
>


And further testing confirms that my issues are NOT gone.  Watching live hd
with xvmc and deint quickly devolves into NVP: prebuffering pauses.  Bitter.
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