I have one mkv file with the same duration (the difference is 7 ms) as the m2ts file of the same silent film. However, the mkv frame rate is 19.980 and the m2ts frame rate is 23.976. How is this possible? Would it be possible to return the mkv to its original 23.976 fps without re-encoding?
MKV - 19.980 fps. Duration: 1 h 44 m 13 s 615 ms
M2TS - (original blu-ray) - 23.976 fps. Duration: 1h 44 m 13 s 622 ms
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Last edited by Enrik; 12th Jul 2019 at 15:12.
The film may not really have been shot at 19.98 fps but may have been projected/digitized at 19.98 fps. That is something of a magic number for NTSC video. It allows each film frame to be displayed for three NTSC video fields, eliminating pulldown judder and jerkiness from frame duplication. Speeding up ~18 fps silent film to 20 fps is common because of this.
Thank you very much, jagabo.