Hi everyone, I'm working to detelecine a video, attached here (12 MB, first 32 seconds truncated): https://www.mediafire.com/file/x4ly6moqb8ayfyy/detelecine_input.mkv/file
I wasn't sure what was the right command to get the result I wanted so I looped over all possible combos like so: for i in 0 1 2 3 4; do for j in 23 2332; do ffmpeg -i detelecine_input.mkv -c:v libx264 -crf 18 -c:a aac -b:a 192k -pix_fmt yuv420p -vf "detelecine=start_frame=$i:pattern=$j" $i$j.mkv; done done It was very clear which option was correct, since the correct option encoded the best and had a significantly smaller file size. I visually verified it too. In the source, every set of 5 frames had 3 clear frames and 2 interleaved frames. In the final output, it preserved those 3 clear frames and combines the 2 interleaved frames into 1, going from 30i to 24p. But I'm just not sure why the correct result was start_frame=3:pattern=2332. Examining the video, it seems pretty clear to me the pattern should be 23. Since it has two interleaved frames. I learned about 23 from https://en.wikipedia.org/wiki/Telecine#2:3_pulldown Could someone explain the gap in my knowledge? Alex _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
