Changing the extension does _not_ switch the container format, although
it might change the icon and it probably starts a different program
when double-clicking, since on Windows files are associated to programs
by their extension.

of course you are absolutely right. i should have mentioned, that in this special case (mjpeg codec with NO audio track), this quick and dirty method did the trick just fine.

a more proper way to achieve this would be a conversion with FFMPEG.
i did that as well (for batch file converting) using the following command:

ffmpeg -i xxx.mov -c:v copy yyy.avi

which seemed to do just the same thing. any image-codecs like "PNG", "TIFF", "TARGA" etc. might work like that, since they are basically nothing more than a series of still images.

of course this method would NOT work if the original codec was "animation" or "mpeg2" etc...

then you would really need to re-encode the new .avi file.
sorry for the confusion.


best

oliver





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