![]() By using only one of the parameters hflip or vflip, of course, the image is flipped on that axis only. This filter flips the image horizontally and vertically. Multiple filters are separated by a comma. The quotation marks allow to insert a space between the filters for readability. The quotation marks are not mandatory for these video filters, yet we advice to always put multiple filters into quotation marks. We advise to avoid the alias -vfilter and its abbreviation -vf as well. The video filter is specified by -filter:v. c:a copy \ output_file Command syntax ffmpeg starts the command -i input_file path, name and extension of the input file -filter:v "hflip, vflip" flips the image horizontally and vertically -c:a copy re-encodes using the same audio codec output_file path, name and extension of the output file Discussion ![]() Note – you must specify the -framerate as the first argument of the FFmpeg command or it will not work.Flip the video image horizontally and vertically. Typically for slideshows, you will want a slow framerate of maybe 0.1fps.įfmpeg -framerate 0.1 -i %d.jpg output.mp4 ![]() You can reduce or increase this value using the -framerate flag. This is because the default framerate for FFmpeg is 25fps. You will notice that the image sequence in your output video moves super fast. Replace 720 with the height in pixels that the video should be. If you get an error saying height not divisible by 2, scale the output like this to fix the problem: ![]() ![]() You can tell FFmpeg to start counting at a number other than 0 using the -start_number flag like this:įfmpeg -start_number 3 -i %d.jpg output.mp4 The default behaviour of FFmpeg is to start at 0 and continue counting up until no more files are found when it is given a placeholder number. In the FFmpeg command, specify the input file as %d.jpg followed by the name of the output file. Now move to the image-sequence directory in the terminal: ![]()
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