ffmpeg resources

ffmpeg.md

ffmpeg

This is an unorganized dump of resources I've looked at for ffmpeg.

ffmpeg  -i ./example_image/outputfinal.gif -i ./example_image/qrborder.gif  -filter_complex "fps=24.999999999999996,overlay=0:0,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse" D:/webbsites/seapad/adapter/finaloutput.gif

ffmpeg -i initialimage.gif -filter:v "setpts=(newdurationinMSeconds / initialDuration)*PTS" out.gif

and this speeds it up:

fmpeg -i  initialimage.gif -filter:v "setpts=(initialDuration / newdurationinMSeconds)*PTS" out.gif

ffmpeg -vsync 2 -safe 0 -f concat -i "file:concat.txt" -lavfi palettegen=stats_mode=diff[pal],[0:v][pal]paletteuse=new=1:diff_mode=rectangle -y "Test.gif"

ffmpeg -ss 30 -t 3 -i input.mp4 -vf "fps=10,scale=320:-1:flags=lanczos,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse" -loop 0 output.gif
final command with quality and overlay combined:
ffmpeg -i top.gif -i bottom.gif -filter_complex "overlay=0:0,fps=10,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse" output.gif # commands separated by commas

with shortest=1:
 C:\Users\greg\Desktop\giff> ffmpeg -i walking.gif -i qrborder.gif -filter_complex "overlay=0:0:shortest=1,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse" output.gif

• https://superuser.com/questions/1591388/ffmpeg-overlay-an-gif-over-video-to-full-scale-of-video-dimension (use shortest=1)

• https://stackoverflow.com/questions/35269387/ffmpeg-overlay-one-video-onto-another-video

• https://stackoverflow.com/questions/55553681/ffmpeg-overlay-transparent-animated-gif-over-video-and-keep-gif-background-trans

• https://superuser.com/questions/472557/animated-gif-as-an-overlay-in-ffmpeg

• https://superuser.com/questions/1607099/how-to-control-gif-loop-settings-in-ffmpeg

• https://stackoverflow.com/questions/50910888/how-to-loop-over-gif-file-finite-number-of-times-while-creating-mp4-as-output-wi

• https://gist.github.com/eyecatchup/51ebf27478889a42e07c2baeedebb76b

• https://stackoverflow.com/questions/23698372/ffmpeg-overlay-video-on-top-of-another-video

• https://ottverse.com/trim-cut-video-using-start-endtime-reencoding-ffmpeg/

• https://stackoverflow.com/questions/39944653/android-split-gif-to-frames-with-ffmpeg

• https://superuser.com/questions/556029/how-do-i-convert-a-video-to-gif-using-ffmpeg-with-reasonable-quality

• https://stackoverflow.com/questions/2017843/fetch-frame-count-with-ffmpeg

• https://superuser.com/questions/138331/using-ffmpeg-to-cut-up-video

• https://stackoverflow.com/questions/18883144/using-only-ffmpeg-is-it-possible-to-consume-a-source-gif-image-and-output-a-vid

• https://shotstack.io/learn/use-ffmpeg-to-trim-video/

• https://stackoverflow.com/questions/39944653/android-split-gif-to-frames-with-ffmpeg

• https://video.stackexchange.com/questions/16564/how-to-trim-out-black-frames-with-ffmpeg-on-windows

• https://stackoverflow.com/questions/18444194/cutting-the-videos-based-on-start-and-end-time-using-ffmpeg

• https://superuser.com/questions/377343/cut-part-from-video-file-from-start-position-to-end-position-with-ffmpeg

• https://gist.github.com/iflamed/533aebade5c6253fa6c8cf43c0c4f582

• https://html.duckduckgo.com/html?q=ffmpeg%20stream_loop

• https://superuser.com/questions/868204/overlay-transparent-animation-over-video-with-ffmpeg

• https://superuser.com/questions/1591388/ffmpeg-overlay-an-gif-over-video-to-full-scale-of-video-dimension

• https://superuser.com/questions/781875/ffmpeg-error-vf-af-filter-and-filter-complex-cannot-be-used-together

• https://superuser.com/questions/556029/how-do-i-convert-a-video-to-gif-using-ffmpeg-with-reasonable-quality/556031#556031

• https://stackoverflow.com/questions/42980663/ffmpeg-high-quality-animated-gif

• http://blog.pkh.me/p/21-high-quality-gif-with-ffmpeg.html

• https://video.stackexchange.com/questions/12105/add-an-image-overlay-in-front-of-video-using-ffmpeg

• https://superuser.com/questions/1655252/ffmpeg-how-to-add-multiple-overlay-gifs-on-top-of-video-command-generator-ru

• https://askubuntu.com/questions/1121094/overlay-image-on-top-of-the-video

• https://www.lcdf.org/gifsicle/man.html

Normalizing audio

• basic: ffmpeg -i input.wav -filter:a loudnorm output.wav
• louder (-14 db): ffmpeg -i input.wav -filter:a loudnorm=I=-14 output.wav
• with highpass and normalization: ffmpeg -i input.wav -af "highpass=f=40,loudnorm=I=-20" output.wav
• https://superuser.com/questions/1312811/ffmpeg-loudnorm-2pass-in-single-line
• https://github.com/slhck/ffmpeg-normalize/
• https://github.com/FFmpeg/FFmpeg/blob/master/tools/loudnorm.rb