Is there any way that I can limit fps with certain value?
For example, using filter graph such as fps=min(original_fps, MAX_FPS).
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When do you need to do this? – Gyan Aug 17 '16 at 04:44
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@Gyan When input files are weird (eg, mp3 with album art) and ffmpeg decides the output framerate should be 90,000 Hz. – Aleksandr Dubinsky Nov 25 '18 at 15:04
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@AleksandrDubinsky I was asking the OP, in order to decide which method would work for them. – Gyan Nov 25 '18 at 16:23
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1@Gyan SO questions and answers are for everyone. That is why the same question asked by me would be closed as a duplicate. – Aleksandr Dubinsky Nov 25 '18 at 16:27
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Unfortunately, typically the answer with ffmpeg is "not as easily as you'd like"
You can parse out the original fps, then do the "min" calculation in some pre-existing script I suppose, or you may be able to set your output to "vfr" (variable frame rate) mode, then use the select filter to try to not allow frames in too quickly. GL!
rogerdpack
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1With `-vsync vfr`, just adding `-r MAX` is enough. This can mess up the encoder time base though, important in duration sensitive encoders like x264...etc – Gyan Nov 25 '18 at 16:15