First or second frame messes up in movie clip editor. #47720
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Reference: blender/blender#47720
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System Information
Windows 10 Home
Processor: Intel(R) Core(TM) i5-3337U CPU @ 1.80GHz
RAM: 4.00GB
System: 64 bit
Blender Version
Broken: (2.77RC2
1e1118e
, 2.76bf337fea
, 2.62)Worked: (optional)
Short description of error
After finishing the motion tracking, if I press shift left arrow to go back to the first frame, the frame messed up (to say it properly, the image is replaced with the image in a frame that I was there when I hit press shift left arrow)
Exact steps for others to reproduce the error
The same error can be seen in this tutorial from Blender Cloud at 14:20 (https://cloud.blender.org/p/track-ma...4a2a00ad6c65ef).
The tutor is fixing that by pressing "reload clip". I'm watching this video series and I can watch the error at least five times. The version the tutor is using is 2.62.
Now in 2.77, the bug still happens. In my case, this happens almost always. Possibly because of lack of RAW(4.00GB)? Memory cache limit in User Preferences is set to be 1024.
I hope this problem is fixed because this happening always isn't comfortable.
I don't know if I need to post the file and the video, because when you reload it, it will be fixed.
movie_clip_editor_error.blend
MVI_4005.mov (80mb)
Changed status to: 'Open'
Added subscriber: @RikuImaizumi
Someone advised me to use proxy, and that helped.
However in other word, I don't think I can make a movie without proxy always, because the video in movie clip editor affects rendered images through node editor. When I used the original movie clip, the weird transition was happening in render.
Added subscriber: @Sergey
Changed status from 'Open' to: 'Archived'
You should use timecode in this case. Root of the issue goes to the fact that without pre-built timecode it's not always possible to reliably navigate in the video stream, which leads to wrong frames being decoded when scrubbing.
Thanks for the report, but it's in TODO to build timecodes automatically.
Added subscriber: @JJones
This is still an issue.
It's been on the radar for a while it seems.
2012: #31215
2014: #35133
2015: #44675
The tutorials I've come across don't specifically mention why they go through the exercise of splitting a movie into a png series and I suspect many of them aren't aware of this reason.
I've submitted a patch to the documentation here, if someone wants to review/expand/re-word it: https://developer.blender.org/D6105
I'll look into a code solution when I have time. At the very least some kind of hint to the user to help them avoid hours of trial and error ;)