FFmpeg 4.3 - Hackdot

Re:FFmpeg 4.3 by Hamuko on Tuesday June 16, 2020 @03:35PM (#23543145)

I actually made my own CLI frontend just because I didn't want to try and memorize ffmpeg options to do the simple things that I want to do most of the time. Now I can just do `--h264 -s X -e Y` to do a h.264 encode from X timecode to Y timecode.

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Re:FFmpeg 4.3 by asveikau on Tuesday June 16, 2020 @11:12PM (#23547320)

Is -s X -e Y really much easier than -ss X -t $((Y-X)) ?

Every couple of years worth of not using an option I need to look it up again. But it's usually not too hard.

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Re:FFmpeg 4.3 by Hamuko on Wednesday June 17, 2020 @02:41AM (#23548478)

Yes, because that doesn't actually work proper. In order to seek fast while having the ability to start encoding at any point without issues with keyframes, I need to actually do `ffmpeg -ss X1 -i FILE -ss X2 -t (Y-X)` where X1 + X2 = X.

Compare:

    frontend -s 05:28:38.667 -e 05:28:58.767 input.ts
    ffmpeg -ss 05:28:28.667 -i input.ts -ss 10 -t 20.100 -pass 1
    ffmpeg -y -ss 05:28:28.667 -i input.ts -ss 10 -t 20.100 -pass 2

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