ffmpeg multiple files dimensions change

Question

I saw a post on superUser on changing dimensions of a mp4 file which like this FFmpeg -I Input.mp4 -vf scale=460:690 output.mp4 but I want to change dimensions of multiple mp4 files in one go so I used the idea which has been used in concat command to generate a list of file names and then using command FFmpeg -i mylist.txt -vf scale=460:690 img%04d.mp4 but as in concatenation there's a single output file so for multiple outputs I used wildcard and whole command turned out like FFmpeg -I mylist.txt -vf scale=460:690 img%04d.mp4 but still I'm getting a single output file.So any suggestions, please

Answer 1

I want to change dimensions of multiple mp4 files in one go

You can use a for command to loop and convert the files one at a time. Something like the following.

command line:

for /f %i in (mylist.txt) do FFmpeg -I "%i" -vf scale=460:690 "output_%i"

batch file:

for /f %%i in (mylist.txt) do FFmpeg -I "%%i" -vf scale=460:690 "output_%%i"

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Further Reading

• An A-Z Index of the Windows CMD command line - An excellent reference for all things Windows cmd line related.
• for /f - Loop command against the results of another command.