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Why is this happening?
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davehhh1
Newbie
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15. June 2005 @ 11:19 |
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Hi all,
This has been doing me in for days. First of I have authored many dvds in the past and this is a new problem I have not encountered.
Basically I had 2 mpeg files that I spliced together using Womble Mpeg Video Wizard. My new file was 4 hours long and around 7 gb.
I put my dvd compliant file into dvd-lab pro and made a simple dvd ready to be shrunk to dvd-5 format.
So all good. I burnt the dvd folders first (in case I end up making a coaster). So I open the VIDEO_TS files in PowerDVD. Whoo hoo it works or so I thought. I skip through the movie and get to about 3 hrs 20 and the video starts being choppy for the remaining 40 minutes. Audio is fine. Very bizarre.
I dvd-shrink the VIDEO_TS folder and look again. Exactly the same problem. Why? It's not that the last 40 minutes was the point I joined the 2 mpegs so why only the last 40 minutes?
I have wasted about 4 days on this and I can't work it out. Even more bizarre is that if you launch the dvd by opening the file via the .IFO file, playback is absolutely perfect so the mpeg is fine.
Now the bit rate of the created movie is VBR peak 9801kps which is 1 kpbs over the standard dvd format. But I am not convinced this is the problem as the film would be choppy all over not the last 40 minutes.
I am really stumped, I even tried to shrink the file again no luck.
Any ideas greatly appreciated.
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dog3y3
Junior Member
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15. June 2005 @ 12:23 |
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I've had similar issues. I don't think it's the fact that you joined them together... DVD lab requires a total bitrate to be less than or equal to 8000kb/s. If the video you encoded exceeds the bitrate, it may hang on the last good frame before the bitrate was exceeded. I've used TMPGenc at 6500 (2-pass) and the hanging has subsided considerably. Scan the help file for 'bitrate'... and it will explain how to use the bitrate tool to find out if you have exceeded the limit at any point in the movie.
On a second note: DVDShrink will only shrink what it sees... it doesn't correct anything while it encodes...If the video doesn't playback correctly before Shrink, it won't be any different after Shrink.
-dog3y3...frequent victim of digital alzheimers
This message has been edited since posting. Last time this message was edited on 15. June 2005 @ 12:24
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davehhh1
Newbie
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15. June 2005 @ 13:17 |
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Thanks for the reply very helpful.
I did the bitrate viewer in dvd-lab pro on the now Vobs. I think this is what you meant. The highest it ever went for the film footage was 6000kbps. So I am not sure why when I extracted the raw Mpg file one time it said it was vbr peak 9801kbps (tmpgauthor).
Very confusing. So dvd lab pro seems to like the vobs.
The menu I created had a huge bitrate that went through the roof, would this have anything to do with it?
I should also add that if I extract the raw mpg again and try and put the mpg clip into another authoring piece of software like Ulead DVD Workshop 2.0 it insists on greying out the box to convert the video file to Mpg DVD. You can't deselect it so Ulead thinks the file is not dvd compliant. But DVD lab pro thinks it is. So something is wrong with the file somewhere... I let Ulead try and convert the file to how it seemed to think a dvd compliant file is and it gave an unspecified error after 16 hours of conversion. Thanks Ulead.
I'm stumped.
Any other ideas?
Thanks.
This message has been edited since posting. Last time this message was edited on 15. June 2005 @ 13:24
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AfterDawn Addict
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15. June 2005 @ 22:44 |
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What are the specs of the file?
Aspect/framerate?
What is the audio type (.wav .AC3 .mp2 .mpa)?
What is the audio bitrate?
Black holes are where God divided by zero...
Cheers, Jim
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davehhh1
Newbie
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16. June 2005 @ 00:24 |
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Hi,
The file is NTSC.
It is a 16:9 file
Runs at 29.97fps
The Audio is AC3 at 320kbps.
Also when the file was made into dvd folders by dvd-lab pro, I analysed the vobs and for 3 of them it said they were 3:2 Pulldown and the others were just Pulldown, but I don't think that is anything to do with it...
Thanks for your interest.
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AfterDawn Addict
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16. June 2005 @ 06:51 |
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Quote:
The menu I created had a huge bitrate that went through the roof, would this have anything to do with it?
Most likely.
A 29.97fps file does NOT have pulldown. You may have encoded it wrong.
Black holes are where God divided by zero...
Cheers, Jim
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davehhh1
Newbie
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16. June 2005 @ 07:28 |
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Thanks.
Right so I created another set of VIDEO_TS this time excluding the menus and the playback again goes all manky at the same point so there is obviously something wrong with the file itself. Again playing the .IFO file it all works fine.
I'm a bit stuck because I tried to reencode the extracted raw mpg and start again but I tried to reencode in both MainConcept and Ulead's encoder and it crashes trying to reencode the mpg.
I have not tried TMPGEnc as it takes about 40 hours. This will be the final resort.
What would you do in my shoes? So frustrating I got this VIDEO_TS folder ready to go yet it goes all funny towards the end but not if you play the .IFO.
Any other ideas greatly appreciated.
Thanks.
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AfterDawn Addict
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16. June 2005 @ 13:42 |
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What plays on your computer has almost nothing to do with what will play in a standalone.
If mainconcept and ulead both crash, you may have other problems with your computer, and not just this file.
I would open the mpg in virtualdubmod, and frameserve it to mainconcept, however, the fault probably lies where your join is.
If you have the originals, I would start over. Encode both pieces separately, then join with tmpgenc's merge tool.
Black holes are where God divided by zero...
Cheers, Jim
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btstephen
Newbie
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19. June 2005 @ 00:40 |
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i did something similar...
only in my case, i used a much larger mpeg file...
i want to create a dvd using dvd lab pro and use dvdshrink to fit it on a dvd
my starting movie is about 27 gig.
i split it in 2 pieces so i could have enough chapters.
there is one motion menu, and 9 chapter selection menus
all videos used are 720x480, 29.97 fps, 4:3 ratio, NTSC
and all audio is 48 kHz, 192 kbps, stereo
when i compile the dvd, it looks as though everything works completely fine, except about halfway into the movie, the dvd program cant read the movie file anymore. it says something like "there was an error on the dvd disk".
all the menus work and all the chapters work up to this point, and it compiles perfectly fine with the test compile.
this leads me to believe that the only problem is that the movie file didnt get completely written or something.
Why is this happening? ive tried 3 times, and still not working.
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davehhh1
Newbie
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19. June 2005 @ 07:32 |
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Yeah I tried again to join the file from scratch with reencoding and I get the same result I think in my case the 2 mpgs were not suited for what I wanted to achieve so I have given up.
Thanks for everyone's ideas though.
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AfterDawn Addict
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19. June 2005 @ 10:39 |
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I wouldn't give up. There's always a way :)
Did you try frameserving?
Did you try a re-encode to uncompressed AVI in VirtualDub?
Did you try masking the (possibly) bad frames at the join?
Black holes are where God divided by zero...
Cheers, Jim
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btstephen
Newbie
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19. June 2005 @ 10:59 |
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rebootjim, sorry to bother, but if you could, please read my previous post, do you have any suggestions?
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davehhh1
Newbie
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19. June 2005 @ 12:33 |
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Thanks for the continued interest.
I will try each of the things you suggested one by one. That should keep me busy for a while!
I will work with the mpg I have edited seeing as it works on the computer and do each point you suggested one at a time.
Thanks.
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AfterDawn Addict
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19. June 2005 @ 12:45 |
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btstephen, the files may simply be too large.
Check the bitrate. Unless running time is about 10 hours, the bitrate is way over spec.
davehhh1, first open the file in VirtualDub-mp3 (yes I know, another version of vdub). Select Video, check for errors, and let it run.
It will output a file called badframes.txt in your C: root folder.
You can then mask those, and frameserve the file to the encoder, and re-encode it.
Your other option, is to open it in virtualdubmod, and simply save it again, as an uncompressed AVI. This file will be HUGE! Make sure you have the room. Alternatively, you could use Huffyuv or mjpeg codecs to retain at least decent quality. Don't use divx/xvid or other crap codecs.
The output file should then be able to be re-encoded to mpeg-2 without error.
Black holes are where God divided by zero...
Cheers, Jim
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davehhh1
Newbie
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19. June 2005 @ 12:54 |
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Thanks great advice. This will keep me busy and I'll be sure to post with my results.
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btstephen
Newbie
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20. June 2005 @ 00:32 |
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rebootjim,
the bitrate of my mpegs are 7960 kbps and 6784 kbps
is this too high?
how high should the bitrate be?
and how do i fix it?
thanks for being so patient with me
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davehhh1
Newbie
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20. June 2005 @ 06:57 |
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Ok,
First step I tried VirtualDub-mp3 and I could not even open the file. I could open other video types but opening this problem .mpg of mine I got "MPEG Import Filter: Pack synchronization error"
So there is obviously something wrong with the file. I will try the other points you listed and let you know.
Thanks.
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davehhh1
Newbie
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20. June 2005 @ 08:46 |
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However,
I did run the error check in virtualdubmod and it said no bad frames but no good frames whatever that means.
I will try to recreate the AVI but you are right it's going to be huge I may not have enough space...
Thanks.
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AfterDawn Addict
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20. June 2005 @ 15:19 |
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If necessary, you could use huffyuv or mjpeg codecs to decrease the filesize, without losing too much quality.
Try frameserving instead, then you don't have to resave a big AVI.
Black holes are where God divided by zero...
Cheers, Jim
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btstephen
Newbie
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22. June 2005 @ 08:11 |
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rebootjim,
the bitrate of my mpegs are 7960 kbps and 6784 kbps
is this too high?
how high should the bitrate be?
and how do i fix it?
thanks for being so patient with me
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AfterDawn Addict
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22. June 2005 @ 09:10 |
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That bitrate seems to be ok, unless this is the video bitrate only, and doesn't include the audio.
How about menus? If you have motion menus, with high bitrate audio, this can throw it out as well.
What is the running time of these vids?
Black holes are where God divided by zero...
Cheers, Jim
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btstephen
Newbie
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22. June 2005 @ 11:00 |
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both vids together is 7 hrs and 37 min
no, i did not include the audio for each video
the bitrate on the first video is 7960 kbps and the audio is 192 kbps
the second is 6784 kbps and audio 192 kbps
the motion menu is also 192 kbps for audio and video 3067 kbps
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btstephen
Newbie
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26. June 2005 @ 17:21 |
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hey guys,
i really appreciate all the help so far.
unfortunately, im on a time limit for this project.
so any help would be greatly appreciated!
my last post -
both vids together is 7 hrs and 37 min
no, i did not include the audio for each video
the bitrate on the first video is 7960 kbps and the audio is 192 kbps
the second is 6784 kbps and audio 192 kbps
the motion menu is also 192 kbps for audio and video 3067 kbps
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davehhh1
Newbie
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27. June 2005 @ 01:23 |
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btstephen,
Your files are too large it's as simple as that. 27 GB split into two to make around 13gb each. That's ridiculous. I don't know any authoring software that can handle files of that size.
I don't know what you are trying to achieve but movies of that size and that running time are not designed for dvd usage. It's as simple as that.
Oh and next time try making your own thread rather than hijacking mine. Your problem was absolutely NOTHING like my problem that I outlined. Nothing at all.
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btstephen
Newbie
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27. June 2005 @ 16:43 |
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davehhh1
my issue is pretty much just like yours
i had two movie files joined together, which i made menus for in dvd-lab pro, and wanted to dvd-shrink my project after compiling it to fit it on a regular dvd-r. once i compiled, the second half of the dvd was not working the way it should.
id say its pretty damn close to your issue.
the only difference is my videos were 27 gig. i thought maybe i could skip encoding it to save time/quality.
excuse me for being new to this and trying to find answers.
thats what the message board is for.
asshole.
thanks rebootjim for all your help.
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