Use trim filter trim=duration=8 get video until second 8, You might want to keep the scale of a specific input instead of setting and for the background: scale2ref Remove part of video Use additional input -f lavfi -i color=c=white:s=x and overlay with it overlay=shortest=1. Better decoder support with: -profile:v high -pix_fmt yuv420p -movflags faststartĮxamples / techniques Set background color.For PC: ffmpeg -i in.mp4 -c:a libvorbis -c:v libx264 -crf 32.

mp4 -c:a libvorbis -c:v libvpx-vp9 -b:v 1400K -g 120 out.webm mp4 -c:v libx264 -crf 23 -profile:v baseline -level 3.0 -pix_fmt yuv420p -movflags faststart.

Width and height divisible by 2: pad=ceil(iw/2)*2:ceil(ih/2)*2.

Textbox: drawtext=fontfile=: text='': fontcolor=: fontsize=: box=1: boxcolor=: boxborderw=: x=: y=.

Vary speed: setpts=0.5*PTS: (remember to half the value of 'vframes', if set), (2x speed, here).

D->RGB: format=pix_fmts=rgb24: convert greyscale to rgb (required for stacking).

Format (input/output): -f, (use -f lavfi to use filter as input).

Set framerate (before input / output to pick target): -r.

Use video/audio filter: -vf = -filter:v / -af = -filter:a.

Set bitrate video/audio: -b:v / -b:a, examples: -b:v 1400K, -b:v 1M.

Set ouput codec video/audio: -c:v = -codec:v = -vcodec / -a:v = -codec:a = -acodec.

Overwrite without asking: -y (contraty to -n).

Set start frame (before -i): -start_number.

Add input alphabetically: -pattern_type glob -i '*.png'.

Add input: -i, example: -i color-%01d.png.A tutorial: Learn FFmpeg libav the Hard Way.This document contains some of the ffmpeg snippets I use most commonly, and typically in the context of converting research-related image data to video.

Ffmpeg png to mp4 lossless