# Fix mp4
\ls -1 *.mp4| | grep -v '.fixed.mp4' | xargs -n1 -I{} ffmpeg -err_detect ignore_err -i {} -c copy {}.fixed.mp4

find . -maxdepth 1 -type f -name '*.mp4' ! -path "*.fixed.mp4" -exec ffmpeg -err_detect ignore_err -i {} -c copy {}.fixed.mp4 \; -exec rm -f {} \;