FFMPEG command works in PowerShell but not in a batch file

Question

Simply trying to extract frames from a video file using ffmpeg in a .bat file and it doesn't work:

ffmpeg -i video.mp4 -qscale:v 1 -qmin 1 -qmax 1 -vsync 0 tmp_frames/frame%08d.jpg

The error message:

Unable to find a suitable output format for '.\tmp_frames\frameC:\Test' .\tmp_frames\frameC:\Test: Invalid argument

This command works fine in PowerShell by itself, but running it as a batch file yields the above error.

Any ideas on how to fix this in the batch file?

Klompengard · Accepted Answer · 2022-04-27 05:34:04Z

4

In the .bat file, you must use the escape code for %, which is %%

ffmpeg -i video.mp4 -qscale:v 1 -qmin 1 -qmax 1 -vsync 0 tmp_frames/frame%%08d.jpg

answered Apr 27, 2022 at 5:34

Klompengard

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Comments

Magoo · Accepted Answer · 2022-04-27 05:25:14Z

2

...frame%08d.jpg : %0 will be replaced by the current batchfile name, hence '.\tmp_frames\frameC:\Test'

answered Apr 27, 2022 at 5:25

Magoo

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Is there an alternative I can use that won't do that?

Possibly, but I've no idea what you want in place of %08... What is it intended to do?

It's an ffmpeg command that basically turns the current iterating frame in the video file into a PNG file.