[mythtv-users] 0.19, XvMC, and Prebuffer pause
Michael Haan
michael.haan at gmail.com
Sat Feb 25 16:03:59 UTC 2006
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.
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