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| IHOP |
| Posted: May 12 2003, 03:28 AM |
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Unregistered
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This issue has probably been reported somewhere else, so I apologize if I'm just repeating something that's already been brought up.
I've found that if I take an MKV and open it in vdubmod I can't play it within vdubmod. The file will play with both the core media player and bsplayer, but if I play it in virtualdubmod it crashes the program. I can jump to keyframes and I can scan for scene changes, but if I hit "Input playback" the program will inevitably crash.
More rarely, I've also had a few MKV files that won't open in vdubmod at all. After trying to open the file, the customary "parsing matroska file" message will come up, but virtualdubmod crashes before it reaches the end. This occurs whenever I try to open these specific files. 
Anyway, great work so far on this very promising format and this wonderful application.  |
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| Suiryc |
| Posted: May 12 2003, 04:45 PM |
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Developer of VirtualdubMod
Group: VirtualdubMod Team
Posts: 222
Member No.: 468
Joined: 10-October 02
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Try 'Preview VBR' for previewing MKV files. There is a bug in CBR reading of MKV files (CBR reading is used by 'Preview' and 'Play', while VBR reading is used by 'Preview VBR').
Strange that it crashed in the middle of parsing ...
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| IHOP |
| Posted: May 14 2003, 07:08 AM |
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Unregistered
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Sorry for not responding sooner - was a bit busy yesterday. I tried the preview vbr option, and unlike the preview and play options, it did indeed *not* crash virtualdubmod. So that's good, however, playback was very slow and choppy - I guess my old machine can't really handle that mode well.
Anyway, I hope that bug gets fixed in a future release. Sometimes I need to edit "by ear" as it were, and as such I need to be able to listen to the audio in a file playing in virtualdub in order to mark where to edit the file.
Now onto the subject of the more mysterious crashing. I gave it some thought, in particular, since I don't like making bug reports without giving as much information about what happened as I can.
I looked over the file that crashes while in the middle of parsing, and I think I realized what happened. As it turns out, just as I thought I figured it out, someone in the Doom9 forum stumbled on the same issue, so I am pretty sure about what it is.
At the time I tested the file, I hadn't realized that the avi clip I had transmuxed into an mkv was one of those 120 fps avi files that utilizes drop frames in order to compensate for a variable rame rate source. So apparently when I made it into an mkv in order to test it, vdubmod dropped the false frames and made a genuinely variable framerate mkv as theorized at Doom9. Subsequently, virtualdubmod was no longer able to open the mkv, and would crash while parsing the file. I guess I tried something a bit advanced without meaning to or even realizing it.  |
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| ChristianHJW |
| Posted: May 14 2003, 09:10 PM |
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Advanced Member
Group: Moderators
Posts: 1768
Member No.: 2
Joined: 7-July 02
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| QUOTE (IHOP @ May 14 2003, 09:08 AM) | | I guess I tried something a bit advanced without meaning to or even realizing it. |
.. LOL ... consider yourself appointed to be a matroska pioneer ...
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