I am thinking about making clips and merging them together in Virtualdub2. My question is, will be able to tell if the video merged or will they not? I know that there are very astute people who can pickup on details but will people able to tell if some video clips got merged into one video? Or is it all just one big "magic" trick that only all but the most eagle eyed individual can detect? How do make it so that the video appears to be one seamless transition to the next?
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So there is a way to make the videos appear "seamless" I do not want any frame to appear out of place.
Last edited by Guernsey; 26th Nov 2021 at 16:35.
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Not sure exactly what you wish but thats probably just me. Are you wanting to create videoes from the same video and join them. Not sure how you would get the end of one video and the start of the other the same but if that is the case then just find the same frame in the second frame as the first and cut starting one frame beyond. Sort of like:
1st videos end
bbbpbbbpbbbP
Pbbbpbbbpbbbp
If you need to search the videos, make an image of the last frame you want in video one. Find similr image in video 2 using a script as:
ffmpeg.exe -i video.mp4 -loop 1 -i image.jpg -an -filter_complex "blend=differencehortest=1,blackframe=99:32" -f null - 2> log.txt
frame= 123 fps=0.0 q=-0.0 size=N/A time=00:00:04.09 bitrate=N/A speed=7.73x
frame= 255 fps=244 q=-0.0 size=N/A time=00:00:08.49 bitrate=N/A speed=8.13x
[Parsed_blackframe_1 @ 06f29ec0] frame:300 pblack:99 pts:9999990 t:9.999990 type:B last_keyframe:250
[Parsed_blackframe_1 @ 06f29ec0] frame:301 pblack:99 pts:10033323 t:10.033323 type:B last_keyframe:250
[Parsed_blackframe_1 @ 06f29ec0] frame:302 pblack:99 pts:10066657 t:10.066657 type:P last_keyframe:250
frame= 388 fps=249 q=-0.0 size=N/A time=00:00:12.93 bitrate=N/A speed=8.29x
frame= 521 fps=251 q=-0.0 size=N/A time=00:00:17.36 bitrate=N/A speed=8.37x
frame= 600 fps=240 q=-0.0 Lsize=N/A time=00:00:19.99 bitrate=N/A speed=8.01x
video:239kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Now the bad news, video 1 cannot end on a b frame, especially if you are merging another video behind it. It would have to be a 'P' frame which it probably is if you created it. If you just cut it, then ending on a 'B' frame will cause many ecitors, especially those that are FFMPEG based, to double up the PTS time of the last several frames to account for this and that will be noticeable.
Best to cut at a 'P' frame and rencode onlly the second video.
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