⚠ This page probably uses CLI tools referenced here

• ffmpeg
• parallel

Davinci Resolve

conversion of 1 .mov file:

ffmpeg -i monfichier.truc -vcodec mjpeg -q:v 2 -acodec pcm_s16be -q:a 0 -f mov monfichier.mov

The -q:v x option defines the quality of the conversion.

Convert a folder at once :

for i in *.MTS; do ffmpeg -i "$i" -vcodec mjpeg -q:v 2 -acodec pcm_s16be -q:a 0 -f mov "${i%.*}.mov"; done

convert all tree at once :

find . -type f -not -name "*.jpg" -not -name "*.png" -not -name "*.JPG" -not -name "*.JPEG" -print0 | parallel -0 --eta ffmpeg -loglevel 0 -i {} -vcodec mjpeg -q:v 2 -acodec pcm_s16be -q:a 0 -f mov {.}-trans.mov

⚠ Beware, this command takes into account several file types that could be found on a SD card and converts everything that doesn't match an image extension.

option to change size : -s 720×480

proxy creation command :

mkdir proxy; for i in *.MOV; do ffmpeg -i "$i" -vcodec mjpeg -q:v 10 -acodec pcm_s16be -q:a 0 -f mov "proxy/${i%.*}.mov"; done

In order to gain space on warez, the ideal is to convert the x264 encoded movies to the x265 allowing for size reduction up to a factor of 10! The -crf 26 option defines the compression, with a value of 0 it is lossless, up to 51 the worst. The value 26 corresponds to the usual compression level of x264 media and allows therefore a good gain of space with minimal loss of quality. the pixel format defined by format=yuv420p (8bits) can be replaced by format=yuv420p10le (10bits) for compatible media at the cost of space advantage. (to find the pixel format of the original media: ffprobe -i myfile.mkv ffmpeg documentation

find . -type f -name "*mkv" -print0 | parallel -0 --eta ffmpeg -loglevel 0 -i {} -map 0 -c:v libx265 -crf 26 -vf format=yuv420p -c:a copy {.}-x265.mkv

Command to reduce the size of a whole tree of .mp3 files to use an ancestral mp3 player with only 256MB of internal memory:

find -type f -name "*.mp3" -o -name "*.wav" -print0 | parallel -0 --eta ffmpeg -loglevel 0 -i {} -vn -ac 2 -b:a 96k {.}-smol.mp3