[mythtv] v28 hdtv-recorder observations

Brandon Beattie brandon+myth at linuxis.us
Mon Oct 25 16:09:11 UTC 2004

With the latest round of patches sat-sun hi res HDTV appears to be
somewhat broken.  non-HD shows plays fine but when watching a HD show
not only is the video ~1/4th speed, but audio is running even slower
(all sounds are lower pitch, drag on, the old "slo-mo" effect.
CPU's running well below capability.  

I'm running off of OSS, rather than ALSA right now.  Using XvMC of
course.  Tried everything I could think of.  Possibly a timing issue.


Not sure if it came through with this patch or another..

On Sat, Oct 23, 2004 at 06:38:50PM -0600, John Patrick Poet wrote:
> Daniel, here are my observations from using your v28 hdtv-recorder patch.
> Video records just fine, but FastForward and JUMP/SKIP forward do not 
> work again.  Rewind JUMP/SKIP backwards seems okay.  FastFoward and 
> JUMP/SKIP works fine when playing a show recorded without v28 applied.
> When EDITING the cutlist of a show recorded with v28, moving backward 
> and forward more than "1 frame" at a time, takes a LONG time.  moving 
> backward and forward in a show recorded without v28 is quick.
> When EDITING the cutlist, moving to the *previous* keyframe works fine.  
> Moving to the *next* keyframe only moves forward by one frame.  This 
> behavior is not unique to the v28 patch, however -- it exists in the 
> current Myth CVS and has for over a month.  I have spent a couple of 
> hours trying to track it down, but have been unsuccessful.
> When watching live TV, changing channels causes the audio to cut out.  
> Pressing +/- gets the audio playing again.  Every time I change the 
> channel, the number of "audio channels" seems to increase.  After 
> changing the channel a few times, it seems to think the program has 20+ 
> audio channels associated with it.  As far as I know, I don't have a 
> single channel with more than one audio stream.
> ChangeChannels.tbz contains the backend/frontend logs from changing 
> channels in live TV.  KASA is my FOX channel, and KOB is my NBC channel.
> With --verbose playback/record enabled, watching a show is painful.  The 
> logging takes up so much that there is not enough left to record/watch 
> the show.
> Do you want me to try and get logs for any other situation?
> Keep up the good work.
> John

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