AAC Audio 128kbit, h264 Video CRF 23: ffmpeg -i input_video.avi -codec:audio aac -b:audio 128k -codec:video libx264 -crf 23 output_video.mp4 Trim a video from a given start time mm:ss to an end time mm2:ss2 (omit the -to flag to trim till the end): ffmpeg -ss mm:ss -to mm2:ss2 -i video.mp4 -codec copy output.mp4.Quickly extract a single frame from a video at time mm:ss and save it as a 128x128 resolution image: ffmpeg -ss mm:ss -i video.mp4 -frames 1 -s 128x128 -f image2 image.png.Combine numbered images ( frame_1.jpg, frame_2.jpg, etc) into a video or GIF: ffmpeg -i frame_%d.jpg -f image2 video.mpg|video.gif.
Save a video as GIF, scaling the height to 1000px and setting framerate to 15: ffmpeg -i video.mp4 -vf 'scale= -1: 1000' -r 15 output.gif.Extract the sound from a video and save it as MP3: ffmpeg -i video.mp4 -vn sound.mp3.
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