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Weird GBPVR problems

 
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Weird GBPVR problems
jfm
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#1
2010-09-29, 04:16 PM (This post was last modified: 2010-09-29, 07:02 PM by jfm.)
[edit]
Please note that all references below to Comcut should be Comskip.
[end edit]

I am using GBPVR 1.4.7 on a Win Xp machine with dual Pentium 2.5s and 2.0 GB memory. Lately, some strange things have been happening. I mention them all here in case they might somehow be related:

1. Comcut messing up - I have it set to cut concurrent with the recording. Doesn't clean the commercials, only marks them to skip during playback. The resulting 1 hr recording indicates a length much shorter. For example, I recorded Castle the other night. The recording is 1 hr long, but it only shows as 22 minutes, and commercials are not cut properly. Shows one big cut in the middle. I can watch the show and, except for the one big cut in the middle, it plays all the way to the end. You cannot skip forward or back, however, because the timeline is all off. So, when I reach the big cut in the middle, I cannot skip back to catch what was cut. The really weird thing is that this behavior is apparently in the recording itself. I can rename the recording and move it to another directory, but it still shows as only 22 minutes. If I play it with VLC, it shows a length of only 22 minutes, too. VLC gives the following error, but seems to play it okay:

"VLC can't recognize the input's format:
The format of '\\Htpc\recordings\Castle\Castle_20100927_22012300.txt' cannot be detected. Have a look at the log for details.
VLC can't recognize the input's format:
The format of '\\Htpc\recordings\Castle\Castle_20100927_22012300.logo.txt' cannot be detected. Have a look at the log for details.

I wouldn't think that Comcut would alter the original video file. This has always happened once in a while, but it is now happening most of the time.

2. Truncated recordings - I am now getting many recordings that are truncated to 30-40 minutes on a 1 hr show - not the timeline just messed up, but actually shortened.

3. Something is causing GBPVR playback to freeze at least once during every play. It always fixes itself, though, in a half-minute or so. This may not be in GBPVR, because I believe that it happened, also, in playing back a GBPVR recording with VLC. I mention it for 2 reasons: a) the possibility that it may be related, and b) if anyone has any suggestions as to how to figure out what is causing the freeze, I would appreciate hearing them.

Thanks to sub for a great program and for nearly 2 years of (almost) trouble-free recording.

[added]
I believe that the truncations have occurred in files that were transcoded to avi format, so that introduces another dimension to the problem. All transcodes previously okay, though, so I suspect, but do not actually know, that the problem is in the original. The originals are automatically deleted, however, so I cannot check them. I'm stopping the deletion now so that I can look at the originals should it happen again.

Jere
jfm
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#2
2010-09-29, 05:08 PM (This post was last modified: 2010-09-29, 06:57 PM by jfm.)
Update:
I transcoded the Castle file to see what would happen, and it was truncated to 35 minutes, so the problem is both in the messed up Comcut original and then the transcoding of the messed up video.

I guess this is a good point, then, to ask if Comcut is supposed to change the original video and if there is a way to prevent it?

Jere

[edit]
Comskip - not Comcut
sub
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#3
2010-09-29, 05:26 PM
I cant support you with comcut. I dont use it here, and dont know much about it. From what I've read it sounds like it does evil things to the time line of the resulting files.
jfm
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#4
2010-09-29, 07:00 PM
@sub

My bad. ComSKIP, not ComCUT.
sub
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#5
2010-09-29, 07:14 PM
What type of file is it? .mpg, .ts, .dvr-ms
pBS
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#6
2010-09-29, 08:45 PM
the vlc messages are because it thinks the comskip .txt files are subtitles and can't figure out which kind...so ignore those..
you can go into vlc option and set it to not auto-load subtitles and you won't see those anymore..

what kind of capture card? it kinda sounds like pvr150/500 bug...
but may be system slowdown from either some other app hogging system [virus/intense app] or severe fragmentation or a soon to fail hard drive...
[you'll sometimes get lots of retries on bad spots before that spot fails completely,pausing *all* other computer actions till it reads successfully]
logs may show something about filesize not growing if so..

there is only 1 part of files comskip can sometimes alter, the pts timeline can be 'fixed' by comskip up to 200 frames by default..
set max_repair_size=0 in comskip.ini to turn that off completely..
have you tried running without comskip?
Hardware: HDHR Prime, HDPVR 1212, Raspberry pi2, VFD display w/LCDSmartie
pBS
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#7
2010-09-29, 08:46 PM
oh and is that an actual 2-cpu machine and not just a dual core?
may have to set it to stick to one cpu...those can be buggy..
Hardware: HDHR Prime, HDPVR 1212, Raspberry pi2, VFD display w/LCDSmartie
jfm
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#8
2010-09-30, 01:27 AM
I'll try to answer all the questions:

They are mpg files
Capture cards are 2 x PVR500
Haven't tried running with no Comskip yet
CPU is Pentium Dual-Core E5200

Here's a question: If I do this - "set max_repair_size=0 in comskip.ini to turn that off completely", what does that accomplish? Is there any reason not to do it?

Thanks
sub
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#9
2010-09-30, 01:42 AM
If you time lines are reporting incorrectly on analog .mpg recordings, and skipping is all over the place, then it sounds like you're suffering the PVR150 timestamp problem (which also effects PVR500 users).

Its very unusual to have an incorrect timeline from an analog hardware encoder device, and this is the only situation I'm aware of it happening.
jfm
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#10
2010-09-30, 02:33 AM
@sub
Thanks for the info re PVR timestamp issue. I found this wiki entry about it and will try the fixes there:

http://gbpvr.com/pmwiki/pmwiki.php/Tips/...Issue#toc4

Hopefully, this will fix it. Thanks again.
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