Showing posts from May, 2020

My note on ffmpeg usage

Most Common Basic Usage to burn subtitles into video ffmpeg -i input.mp4 -vf subtitles="" output.mp4 with gpu ffmpeg -i input.mp4 -c:v hevc_amf -vf subtitles="" output.mp4 ffmpeg -i input.mp4 -c:v h264_amf -vf subtitles="" output.mp4 ffmpeg -i input.mp4 -c:v h264_nvenc -vf subtitles="" output.mp4 Use this command to list down gpu option available ffmpeg -f lavfi -i nullsrc -c:v h264_nvenc -gpu list -f null - Below is the RAW note which I haven't tidy up. Bash Shell Script for convert media file in batch. for f in *.flv do #echo $f #echo ${f%.*} ffmpeg -i $f ./done/${f%.*}.mp4 done rename 's/ACDC/AC-DC/' *.xxx To replace # by somethingelse for filenames in the current directory (not recursive) you can use the GNU rename utility: rename  's/#/somethingelse/' * Characters like - must be escaped with a \. ffmpeg -i orig.mkv -filter_complex "[0:v][0:s]overlay=(W-w)/2:(H-h)/10*9

Connect 2 monitors to Dell Laptop G3 15 on Fedora 32

If you are trying to connect 2 monitors (HDMI + USB C), you might find that only USB C and the laptop monitors is working in Fedora 32. After I search around, here is the simple solution. Create a file (any file name end with extension .conf) under folder /etc/X11/xorg.conf.d. I name it 11-nvidia-prime.conf. (Copy from ubuntu). Enter the lines below and reboot.  [root@localhost xorg.conf.d]# cat 11-nvidia-prime.conf Section "OutputClass"     Identifier "Nvidia Prime"     MatchDriver "nvidia-drm"     Driver "nvidia"     Option "AllowEmptyInitialConfiguration"     Option "IgnoreDisplayDevices" "CRT"     Option "PrimaryGPU" "Yes" EndSection I believe this solution should be working for Fedora 25 and above. Leave me a message if you have question.