I’d got a sequence of images from my last snowboard trip and want to group them in a mp4 format. Problem is that they don’t start from 0 or 1 so I need a script line before feeding them to FFmpeg and create a video.
To reduce size:
$ mogrify -resize 50% *jpg
The files pattern was something like Y003.jpeg. To test renaming:
$ rename 's/.+/our $i; sprintf("Y%03d.jpg", 1+$i++)/e' * -vn
To rename in fact, just remove the -vn option.
Now use ffmpeg to generate the mp4 file.
$ ffmpeg -framerate 2 -i Y%03d.jpg -c:v libx264 -profile:v high -crf 20 -pix_fmt yuv420p output.mp4
Now you should have a output.mp4 file on your folder.