Scriptable tool to change AVI frame rate metadata?

[FurrTheBear]

I'm looking for a tool that runs on XP that will let me change the frame-rate setting in an AVI file from a batch file script. I know about AVIfrate.exe - but one can only load a file as a command line option and despite spending a lot of time trying to create a "wrapper" for it in AutoHotkey, it still doesn't work reliably. I really want to come up with a solution where the script can run without me having to watch it and intervene if the AVIfrate part hangs up.

A command-line only tool is fine, a GUI tool is also acceptable as long as it can take all the necessary parameters from the command line.

The goal here is actually to make the video play at a different speed, not re-process it to play at the same speed just using a different frame rate. (You'd think this would be an option somewhere in FFMPEG - but if it's in there, I haven't found it yet.) I know how to reprocess my audio to match the new frame rate, so that's not a problem. I just need a way to tweak the AVI's metadata.

Any assistance on this would be greatly appreciated!

[Soopafresh]

Dunno if it'll work but try

ffmpeg -i input.avi -r 29.97 -vcodec copy -acodec copy output.avi

[FurrTheBear]

Dunno if it'll work but try

ffmpeg -i input.avi -r 29.97 -vcodec copy -acodec copy output.avi

Clever idea ... but it doesn't seem to work. I tried it on two different versions* of FFMPEG I happened to have around, and neither changed the FPS metadata in the output file.

* SVN-r16043-Sherpya and SVN-r18639 in case anyone's wondering.

[Soopafresh]

Bummer. Try this thread. I found a commandline app a few years ago that might work.

https://forum.videohelp.com/topic322253.html

Edit - Newer version of Avimaster http://www.thozie.de/AVIMaster.zip

[FurrTheBear]

Bummer. Try this thread. I found a commandline app a few years ago that might work.

https://forum.videohelp.com/topic322253.html

Edit - Newer version of Avimaster http://www.thozie.de/AVIMaster.zip

I found a tool I already have and use can do it... *grin* The command-line version of AVIdemux can set the frame rate of a video stream it's copying. Essentially the same idea you suggested with FFMPEG, just a different tool - so thanks for the idea to look at the problem that way! Instead of demuxing the video stream with FFMPEG and then trying to change the frame rate - this does it all in one step:

avidemux2_cli.exe --load InFile.avi --video-codec COPY --output-format AVI --no-audio --fps [WhatEver] --save OutFile.avi --quit

YAY!