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| Jogobo |
| Posted: Mar 16 2004, 08:25 PM |
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Unregistered
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Hello to all forum members!
I came across a problem I did not have before but it is driving me crazy by now.
I try to convert an AVI file to an MPEG2 file (DVD format) as I did hundreds of times before. But the last 3 or 4 files resulted in "hopping" video clips. It can be seen very good (and makes watching a movie impossible) during camera moves. The movement is not soft and fluent but somehow jumping as if 2 or 3 equal frames are displayed and then the 4th frame is shown 2 or 3 times again and so on. Sometimes there are smooth passages of about 0.5 seconds but this is the exception to the rule.
As I said before I did not have this problem until a few days ago. When watching the original AVI file with PowerDVD everything is ok. But watching it with VirtualDUb without any filters or compression results in this jumping movie.
I'm quite sure this is a decompression issue but I cannot find the cause. So if anyone can help please. |
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| stephanV |
| Posted: Mar 16 2004, 10:16 PM |
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Spam killer ;)
Group: Moderators
Posts: 4348
Member No.: 8917
Joined: 18-February 04
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im no expert, but theres one thing not entirely clear to me here...
you say the avi-file is playing jumpy in VD but not in another player - how about the MPEG2 file you created, does that play ok in that player?
VirtualDub should not be considered as a media-player, with certain files (f.e. big file size) it can have problems in playback - it will still encode/frameserve correct though
another thing could be framerate, are you converting this somehow?
compare the format of avis that did 'work' with your avi that doesnt 'work' (codec, framerate, etc.)
look this up in file---->file information, it might give you some clues if you see a difference
i dont see (yet) why it should be a decompression issue as all your other files have worked fine...
hope this helps a little in finding the cause
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useful links:
VirtualDub, Input plugins and filters, AviSynth, AVI-Mux GUI, AC3ACM by fcchandler, VirtualDub FAQ |
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| Jogobo |
| Posted: Mar 17 2004, 07:46 AM |
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Unregistered
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| QUOTE | im no expert, but theres one thing not entirely clear to me here...
you say the avi-file is playing jumpy in VD but not in another player - how about the MPEG2 file you created, does that play ok in that player? |
It was a problem with VD and AviSynth (2.08 and 2.54). Going through the frames 1 by one in VD showed a movement every other frame and not every frame as it should. When creating a MPEG2 file it was the same result as the frameserver delivered "wrong" frames.
| QUOTE | | VirtualDub should not be considered as a media-player, with certain files (f.e. big file size) it can have problems in playback - it will still encode/frameserve correct though |
That's exactly what it did not do.
| QUOTE | | another thing could be framerate, are you converting this somehow? |
I tried with original framerate as well as with AssumeFPS(25) in AviSynth. Always the same choppy result.
| QUOTE | compare the format of avis that did 'work' with your avi that doesnt 'work' (codec, framerate, etc.)
look this up in file---->file information, it might give you some clues if you see a difference |
Well, that was the big point. Even the files that worked before now result in a choppy conversion. And I could not remember what changed since then.
| QUOTE | | i dont see (yet) why it should be a decompression issue as all your other files have worked fine... |
Anyway, your reply made me remember an issue with codec settings in the registry. I recently installed an update for Nero Show Time which must have changed my settings. After re-changing these settings everything works as it should now.
Twimc:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Drivers32
VIDC.mp42 was mpg4c32.dll is now divx.dll
VIDC.mp43 was mpg4c32.dll is now divx.dll
VIDC.mpg4 was mpg4c32.dll is now divx.dll
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| Jogobo |
| Posted: Mar 17 2004, 08:57 AM |
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Unregistered
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This is somehow strange. After changing the registry settings to the above values I tested with an AVI file with a long camera movement. Converting to MPEG2 resulted in a smooth movement too.
Then I tested 2 other files and the results were choppy. Testing the first file again resulted in a choppy video again.
No I'm lost...
--edit
...well, looks like I'm not really lost yet.
Tried with DirectShowSource instead of AviSource and the result is much better. Though I got the impression that the result is not as fluent as the original AVI played with PowerDVD (or Nero ShowTime or DIVX Player). So I'm still interested in any suggestions to solve this strange behaviour.
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