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| gstock |
| Posted: Dec 5 2002, 05:46 PM |
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Unregistered
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I do slow motion sports analysis and I would like to be able to use Virtual Dub to merge two AVI files so that they play back side by side.
I currently do this with Animation shop but I would prefer to do all of my processing in Virtualdub.
Here is an example of what I am trying to do:
http://www.angelfire.com/80s/baseball1/hit...g/rob.sosa.html
Does anyone know how to do this?
Thanks,
Gregg Stock
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| fccHandler |
| Posted: Dec 5 2002, 06:15 PM |
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Administrator n00b
Group: Moderators
Posts: 3961
Member No.: 280
Joined: 13-September 02
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Hello.
I couldn't see your movie (I haven't put the QuickTime virus on my new system yet <g>), but IIRC Avisynth has a command "StackHorizontal()" which displays two video clips together side-by-side.
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May the FOURCC be with you... |
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| gstock |
| Posted: Jan 8 2003, 09:16 PM |
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Unregistered
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Belated thanks for the solution. I've been using it regularly.
I have another question. When I playback DivX clips it seems that VirtualDub is doing an on-the-fly decompress. So it makes the scrolling back and forth choppy. When I'm viewing the uncompressed source I don't have the problem. Is there a way to have VirtualDub do a full uncompress of the clip and store it in RAM so the slide bar can work smoothly?
Thanks,
Gregg Stock
Here are some examples of clips that I made.
http://www.dslextreme.com/users/gstock/images/clips/
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| jcsston |
| Posted: Jan 8 2003, 09:54 PM |
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Matroska Dev
Group: Moderators
Posts: 553
Member No.: 652
Joined: 3-November 02
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Whenever I'm working with compressed avi's and need to seek around hold down 'Shift' on the keyboard. That will snap it to keyframes which are decompressed almost instantly.
The problem with seeking in DivX files is that there are two different frame types (3 if you include B-frames).
A keyframe or I frame is a complete compressed frame and does not need any other frames to be decompressed.
P or delta frames only contain the differences from the previous P frames.
Say you have a video file the frames are IPPPPPPPPPIPPPPPPPPIPPPPPPPP
You seek to the P frame in bold, the decompressor will have to start at the I frame in bold and decompress all the frames up to your chosen P frame.
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Use the Matroska file format |
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| gstock |
| Posted: Jan 8 2003, 11:18 PM |
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Thanks for the background.
I'm doing something a bit different. My clips are only about 30 to 100 frames long but I want to be able to scroll smoothly forward and back through each frame.
Could AVIsynth create a temp file that would be decompressed and then view the temp file in Vdub? |
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| Belgabor |
| Posted: Jan 9 2003, 12:32 AM |
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Developer of VirtualdubMod
Group: VirtualdubMod Team
Posts: 100
Member No.: 998
Joined: 24-November 02
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how about compressing it to huffyuv?
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[VirtualDubMod Homepage]
Please submit any bugs/patches/feature requests also using the respective tracker on our sourceforge page |
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| fccHandler |
| Posted: Jan 9 2003, 04:22 AM |
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Administrator n00b
Group: Moderators
Posts: 3961
Member No.: 280
Joined: 13-September 02
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You could also set "max keyframe interval" = 1 when you compress the files to DivX. Then every frame will be a key frame, and you'll be able to scroll smoothly forwards and backwards. (Of course, if you do that, the DivX files will end up being very much larger than what you're used to.)
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May the FOURCC be with you... |
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| doggyjumper |
| Posted: Jan 19 2003, 07:30 PM |
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I had been looking for a long time for an easy way to do what the initial posting was about . Especially in sports one want it easy and flexible .
I must say I have found the software that does it ( up to 4 clips on one screen) , even more, saving and even transferign from PAL to NTSC ( what I also needed) adn vice verso does it in a breeze .
No this is not publicity for it , just merely mentioning that there is software around that we are not aware of .
it makes my so job so much easyer and with good quality and from there I can still go to VD and other software.
regards
Guy
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