Re: AW: glitches, another story *g* - more bad news ;-(

[Andreas Peter <ujq7@rz.uni-karlsruhe.de>]

Guido Fiala wrote:
> 
> Am Thu, 12 Oct 2000 schrieb Guido Fiala:
> >Am Thu, 12 Oct 2000 schrieb Schuett Thomas:
> >>Hi Guido,
> >>
> >>>Another thing: even with the "small" 256k buffers i could not produce any
> >>>record-buffer-fulls recording with "cat /dev/video > test.pav".
> >>
> >>I have glitches in the record (havent checked logfile, but it is in the record,
> >>on playback always the same positions etc.) when recording with
> >>cat /dev/video > file. I am just going to try buffer -i /dev/video > file
> >>to see if it makes a difference.
> >>
> >>But after all the solutions that I have seen in the ml, and that worked for
> >>some and not for others, I am really close to sure, that there are
> >>
> >>           several reasons for the glitches.
> >>
> >>We should have a matrix of possible solutions and who has tried
> >>what and if it worked completely/partial/not.
> >>
> >I made further tests with different outstream-formats - it seems that there are
> >at least 2 occurences of recorded glitches: the one with
> >buffer-full/missed-video-data producing blocking-failures and another type
> >- even if there are no errors shown in log -
> >producing audio/video-latency with flashing image disturbances every a few
> >seconds.
> >
> Cooling seems not to help! (lmsensors report now 5 degree less temperature)
> Still to much glitches (with no buffer-full-syslogs)
> 
> But something to think about:
> Watching TV the same time does not show any failures, these are just in the
> recorded files - i suspect that only these part of the card/chip is
> affected/buggy.
> My feeling was, it started with the later drivers (>0.5). Will make some tests
> with "cat /dev/video >test.pav" to check it.
> 
> But it would help, if someone can verify if these failures happen under W95 too,
> who can do it?

Hi,
I've also problems with recording glitches.
I'm using driver ver. 0.71 and Klaus' VDR. Watching TV works fine, but
playback recording produces glitches every second.
I think the performance of my System is not the Problem:
Dual Celeron 533
Gigabyte 6BXDS
Maxtor DiamodMAX 60GB HD
Hauppauge DVBS (cooled with fan)
SuSE 6.4

I tried to record with VDR and cat /dev/video > 001.pva. The playback
results are the same: glitches every second.
I think VDR does not produce the glitches, so I tried older versions of
the driver.

A file recoded with ver. 0.71 (cat /dev/video0 > 001.pva) produces
glitches if it is played with ver. 0.71 BUT it can be played error free
with ver. 0.04!

Ralph, what do you think?

Andreas