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Hi
I was looking for a program that I can modify hex values of an .avi file from mjpg to MJPG because my NLE IS cAse SenSitiVe and use the internal mjpeg reader only when recognize the MJPG string, and not mjpg (if found "mjpg" use external VFW or directshow codec).
I need to build a batch file so it automatically modify (from mjpg to MJPG) the file o:\temp.avi, is exist a program than can do this?
e.g. I launch c:\cat.bat, press the return, and it automatically change o:\temp.avi without doing anything else
This because files generate in virtualdub have alwais the word of fourcc tag in lowercase
thanks
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There are scripts if you do a search on the web that will do it if those hex values are in same place on all files. Those are easy script. Much harder to do if location of hex value changes in each file but it can be done. Search 'batch file to change hex values' in google for program that does it. One is found on Softpedia but it is not free.
Extraordinary claims require extraordinary evidence -Carl Sagan -
VirtualDub has a built in hex editor. Tools -> Hex Editor...
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Did you try gpatch?
https://forum.videohelp.com/threads/361042-vtag-MJPG-and-not-mjpg
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You can also use AVI FourCC Changer.
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yes but doesn't work with large fileOriginally Posted by poisondeathray
:
D:\>gpatch d:\virtualdubok.avi /i0112 /s"MJPG"
GPATCH 2.1 - File Patching Utility
Copyright (C) 2002-2010 by Greg Wittmeyer - All Rights Reserved
Failed to open file "d:\virtualdubOK.avi": The file is too large to load into
memory.
D:\>
I have write and email to the author of virtualdub but I don't have answer -
About what?Originally Posted by marcorocchini
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seems to work this:
cfourcc -i virtualdub.avi -u MJPG -d MJPG
from https://forum.videohelp.com/threads/341713-GUI-Tool-created-for-batch-video-tasks -
That's not a vdub error, that's a gpatch memory errorOriginally Posted by marcorocchini
yes but doesn't work with large file :
D:\>gpatch d:\virtualdubok.avi /i0112 /s"MJPG"
GPATCH 2.1 - File Patching Utility
Copyright (C) 2002-2010 by Greg Wittmeyer - All Rights Reserved
Failed to open file "d:\virtualdubOK.avi": The file is too large to load into
memory.
Another option is to batch ffmpeg -vtag "MJPG" with -c:v copy -c:a copy, but ffmpeg does not allow in place editing (slower because it has to stream copy audio/video) -
yes, seems to work this:
cfourcc -i virtualdub.avi -u MJPG -d MJPG
from https://forum.videohelp.com/threads/341713-GUI-Tool-created-for-batch-video-tasks
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