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I have encoded a video from Lagarith to H.264 using x264, and I might have inadvertently forgotten to write down it's framerate. The video stream itself isn't in any container (just a h264 file), so it doesn't have any dimension or framerate headers. I can't re-encode the video as it took 4 days to encode and is 66gb.
If it helps, I know that fps = (number of frames)/duration, and I have a FLAC file that is exactly the same length, but I don't know to get the number of frames from the h264 file and the exact length of the FLAC file.
How would I go about finding the framerate of the video?