On Sunday 18 September 2005 01:00, Hans Verkuil wrote:
> On Sunday 18 September 2005 00:38, Leonard Orb wrote:
> > I wrote:
> > > I'll go back to older versions today - more info to come...
> >
> > There seems to be no exact break point were the problem shows up. Below
> > is a list of ivtv versions and kernel versions. Status "few" means that
> > there are some minor quality problems: locally disturbed pictures, just
> > as if only a few bytes were missing or changed in the mpeg file. This
> > happened with both versions 0.3.3z and 0.3.4z, and it was far less often
> > compared to 0.3.5z and 0.3.8, where all recordings had drop outs, and
> > some recordings had gaps of up to one second.
> >
> > These gaps are missing data, mplayer would not only skip forward within
> > the video playback, but also the time index info from the status line
> > steps forward when this happens.
> >
> > It seems to me that this problem was already present in 0.3.3z, but it
> > became worse between 0.3.4z and 0.3.5z. And it seems not to have anything
> > to do with the kernel version. All my kernels came from kernel.org and i
> > did not apply any patches.
> >
> > ivtv vers kernel vers status comment
> > ----------+-----------+------+-----------------------------------------
> > 0.2.0-rc3f 2.4.31 ok months without any probs
> > 0.2.0-rc3k 2.6.12.6 ok one week without any probs, several hours
> > of recordings 100% ok
> >
> > 0.3.3z 2.6.11.12 few quick test, one hour recorded and checked
> > 0.3.4z 2.6.11.12 few well tested, about 3 hours recorded and
> > checked
> >
> > 0.3.5z 2.6.12.6 drops well tested, about 2 hours recorded and
> > checked 0.3.8 2.6.11.12 drops quick test, one hour recorded and
> > checked 0.3.8 2.6.12.6 drops well tested, about 10 hours
> > recorded and checked
> >
> > I'll further go back to older 0.3.x versions...
>
> Thank you very much for taking the time doing this. Based on this info I'm
> comparing 0.3.4z and 0.3.5z to see if anything looks suspicious. BTW, can
> you post the ivtv START-END messages in the dmesg output? Also, if you have
> particularly good examples of drops and/or locally disturbed pictures then
> put them aside if possible. I might want to look at them later.
Oh, I just thought of two other questions: what do you use to record a
program? MythTV? And are you doing anything with VBI data? The easiest way to
check this is to run 'ivtvctl -W -X -B' when a recording is in progress. This
reports all the currently active settings. If you can post this too?
Hans
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