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sneaker_ger · 22nd January 2018, 17:15

Changed video fps is not really detectable from the container. Maybe you can find info in the bitstream of original fps (e.g. in H.264 time_scale and num_units_in_ticks - I think MediaInfo even shows this).
Changed audio depends. Sometimes the audio is stretched so that the frames overlap or have gaps. eac3to will detect this if you demux/recode such tracks. If otherwise constant you can compare duration in mkv container with duration of extracted stream.

Very often the mkv container cannot offer you such informations except the duration. Merging video and audio from different sources is more of a trial and error process.

22nd January 2018, 17:15	#5056 \| Link
sneaker_ger Registered User Join Date: Dec 2002 Posts: 5,565	Changed video fps is not really detectable from the container. Maybe you can find info in the bitstream of original fps (e.g. in H.264 time_scale and num_units_in_ticks - I think MediaInfo even shows this). Changed audio depends. Sometimes the audio is stretched so that the frames overlap or have gaps. eac3to will detect this if you demux/recode such tracks. If otherwise constant you can compare duration in mkv container with duration of extracted stream. Very often the mkv container cannot offer you such informations except the duration. Merging video and audio from different sources is more of a trial and error process. Last edited by sneaker_ger; 22nd January 2018 at 17:18.