setpts filters required for PTS adjusting for second and later repeats, otherwise most output muxers will fails with non-monotonic PTS increasing: loop does not recalc PTS.
Zero loop= arguments means infinity loop. Next command doing this work for you: ffmpeg -re -f lavfi -i "movie=filename=input.mp4:loop=0, setpts=N/(FRAME_RATE*TB)" output.mp4 Or to loop a GIF: ffmpeg -i input -loop 3 output.gifįor GIF output also see How do I convert a video to GIF using ffmpeg, with reasonable quality?Īt least on FFmpeg 2.8.x (but oldie should works too) you can use lavfi as input format and complex filter graph using movie and setpts filters as a argument for -i option. series of images ffmpeg -loop 1 -i %03d.jpg -t 30 -vf format=yuv420p output.mp4 vf format=yuv420p is for compatibility reasons. This example will loop a single image over and over but the -t 30 will limit the output duration to 30 seconds: ffmpeg -loop 1 -i input.png -t 30 -vf format=yuv420p output.mp4 But it can be used to infinitely loop a single image or a series of images. The -loop option is specific to the image file demuxer and gif muxer, so it can't be used for typical video files. 1 means no loop, 0 means infinite loop.The movie and amovie filters have a loop option: ffmpeg -f lavfi -i "movie=filename=input.mp4:loop=4,setpts=N/FRAME_RATE/TB" -f lavfi -i "amovie=filename=input.mp4:loop=4,asetpts=N/SR/TB" output.mp4 You must list the number of frames to loop (shown as 75 in the example above).This filter places all frames into memory.This example is the same as above but you don't have to manually make list.txt: for i in do printf "file '%s'\n" input.mp4 done) -c copy output.mp4Įxample using the loop filter to loop 4 times, each loop is 75 frames, each loop skips the first 25 frames of the input: ffmpeg -i input.mp4 -filter_complex "loop=loop=3:size=75:start=25" output.mp4 Automatically make list.txt in Linux/macOS If you want to add additional inputs make sure they all have the same attributes. Then run ffmpeg: ffmpeg -f concat -i list.txt -c copy output.mp4 Contents of an example text file to repeat 4 times. The concat demuxer allows you to loop an input without needing to re-encode because it can use stream copy. This may not work with anything older than FFmpeg 4.0.0 means no loop, -1 means infinite loop.
0 kommentar(er)
