wiki/help/media/Compression.md

photo

1. Convert all to jpeg with convert 1.png 1.jpg.
2. Use jpegoptim jpegoptim 1.jpg.
3. Compress jpeg mogrify -quality 80 1.jpg.
4. Scale down jpeg mogrify -resize 2073600@ 1.jpg.

video

1. Install mesa-dri-drivers for VAAPI support. check with vainfo.
2. convert with ffmpeg -i ./1.MOV -vaapi_device /dev/dri/renderD128 -vf 'format=nv12,hwupload' -c:v hevc_vaapi -global_quality 25 -ac 2 -c:a aac -strict -2 -b:a 128k ./1.mkv. To reduce size increate global_quality value.