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Jon Holiday
TMPGENC - VBR log file
on Feb 13, 2010 at 3:26:51 pm

Every so often during VBR, my TMPGENC will crash at the half way point AFTER creating the "log" file. Is there a way to complete the encode using this log file so it doesn't have to do it all over again? I generally work with usually longer files (1 hr plus), so it takes a while.


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Chris Blair
Re: TMPGENC - VBR log file
on Feb 13, 2010 at 5:41:31 pm

I'm not certain but I believe log files are nothing more than a text listing of what the program did during the encode. I could be wrong but I've never seen a log file from any program that could be used for anything more than recording information.

Also...which version of TMPGENC are you using? While Pegasys makes very good products, they're not widely used...at least in the US.

We use the freebie version of their encoder and it comes in handy to mux and demux files, but it's MPEG2 encoder is waaay too slow for us. IT's output is gorgeous, but not at the expense of taking 5-10x to encode the file.

But I doubt you could use a log file to pick up where encoding stopped on a failed file. Have you checked your computer's drive space? I believe TMPGENC caches files as it encodes so if your encode is a 3GB file, you'd need at least 8-10GB free for as it caches and writes the file and for any sort of cached virtual memory your computer might be using at the time. That's just a wild guess as to why an encode would fail.

But without a LOT more information, it's hard to give you much more help.

Chris Blair
Magnetic Image, Inc.
Evansville, IN
http://www.videomi.com


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Jon Holiday
Re: TMPGENC - VBR log file
on Feb 13, 2010 at 5:55:54 pm

V 2.5 Plus. Well, I THINK that the log file is a record of the first pass analysis. In other words, its encoding decisions are recorded there. Cinemacraft, for example, calls it a vaf file. Looking at the file, that's what it looks like. So someone correct me if I'm wrong. But if I'm right, then one can see why I want to do this. On a 1 hr file, it can take 1 to 2 hrs (depending on filters) to do that first pass.

http://www.imageonemedia.com


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Jon Holiday
Re: TMPGENC - VBR log file
on Feb 13, 2010 at 8:10:17 pm

To be clear, I'm using 2-pass VBR, so at the half-way point, no encoding has been done, only the analysis. The log is created as the first pass analysis is happening.

http://www.imageonemedia.com


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Chris Blair
Re: TMPGENC - VBR log file
on Feb 14, 2010 at 1:40:50 am

I'm not aware of any encoding programs that can pick up an encode after it has failed. That doesn't mean one doesn't exist, but I've used or demo'd just about every encoding application out there, from the very expensive to the freebies and I've never seen that feature. We have a paid version of TMPGEnc 2.5 on one of our edit systems and (the freebie version on the others) and I believe that's the one they call "plus." I've never seen any option to use that log file.

I'd be more concerned with fixing the crashing though. Is there any pattern to it? Is the machine you're using powerful? Are the source files of good quality? Have you checked on the Pegasys forums to see if it's a common problem? Have you upgraded to the latest version? I could go on but an encoding app crashing in the middle of an encode shouldn't happen...or if it does...it should happen rarely.

So giving us more info would really be necessary to help. Like what's your source file? Format, pixel size, codec etc. What are you computer specs. What exact version of the software are you using (is it the latest version from their website?) etc.

Chris Blair
Magnetic Image, Inc.
Evansville, IN
http://www.videomi.com


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Jon Holiday
Re: TMPGENC - VBR log file
on Feb 14, 2010 at 2:20:27 am

Well I do need to upgrade my computer, but I'm not sure that's the problem. This version of TMPGEnc was out when my system was still considered ample. It happens rarely, and I usually find that if I re-boot, it will sail through without problems. 3G Athlon (single core tho), 1G RAM, files are DV-AVI, so 720x480. V 2.521.58.169, i may need to upgrade that, I will check. Thanks for any response, does this give you any other thoughts?

http://www.imageonemedia.com


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Chris Blair
Re: TMPGENC - VBR log file
on Feb 14, 2010 at 6:02:39 am

If it happens rarely and then works after a reboot...I'd just make sure to reboot my computer anytime before starting a long encode. In fact, we often make it a practice to reboot before starting a long batch of encodes with ProCoder or Carbon Coder or any application that is going to be running an encode or render for a long time.

So if we're starting an After Effects render that takes a couple hours...we reboot the computer to make sure it's running with full memory allocation and other stuff isn't loaded etc.

Chris Blair
Magnetic Image, Inc.
Evansville, IN
http://www.videomi.com


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Daniel Low
Re: TMPGENC - VBR log file
on Feb 14, 2010 at 7:22:35 pm

[Jon Holiday] "1G RAM"

Upgrade that for a start!

Have you looked and asked here? - https://secure.pegasys-inc.com/faq/index.php?lang=en

Also, make sure you've deleted all old log files and temp directories that may be hanging around.

Also it might be worth doing a complete uninstall/re-install as well as looking through the registry for remnants of the application, if any.



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