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You can do this with ffmpeg using either the concat filter or the concat demuxer. Which one to use depends whether or not your inputs have the same parameters or not. If they do not, you may have to perform additional filtering to make everything suitable to be concatenated properly. Example: concat filter For inputs that vary in frame rate, width, and ...


2

Ok, it can be done, but it's inelegant and has limitations, which make it in the end, not worthwhile. The limitation is that this only properly works with fixed-width fonts. And due to a still-unfixed-bug in ffmpeg, it will look somewhat ugly. But here it is, ffmpeg -i input.mp4 -lavfi "color=white:1280x120,fps=30[c]; \ [c]format=rgba, \ ...



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