I have 60 min screencast from my desktop. I want to speed up it so it fit in 5 min
I have selected strip > Add > Effect strip > Speed control
Scaled strip size so it fits within 5 min(with speed control strip)
Most of scene settings set default. Just changed resolution, format (FFmpegVideo) encoding to H.264.
Hit Render animation. It renders all frames.
HOWEVER, when i open final result all video fit in ~1.5 - 2 minutes, and all after that just nothing, while player timeline shows that length of video is 5 minutes. Player just stop because seems like it know that video should 5 min but frames ended earlier.
Feels like some fps settings must be changed but how to do it correctly?

What am I forgetting.
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  • $\begingroup$ Did you cut the video before changing its speed? $\endgroup$
    – TheLabCat
    Jun 18, 2021 at 1:54
  • 1
    $\begingroup$ If you're using the latest blender version, it has bugs in speed strip: developer.blender.org/T89120 try opening your project in an earlier version of Blender. $\endgroup$
    – tintwotin
    Jun 18, 2021 at 4:33
  • $\begingroup$ @zargulthewizard , No, why should i? I want fit 60 min into 5 min(no audio provided) just it. Problem is that after render player see video length as 5 min(as in blender timeline) but video itself ends earlier $\endgroup$
    – Archirk
    Jun 18, 2021 at 13:49
  • $\begingroup$ Just checking. I’ve had trouble with speed control before. $\endgroup$
    – TheLabCat
    Jun 18, 2021 at 14:57

1 Answer 1


Seems like that VLC player does not handle well MP4 rendered by blender with h.264 and it's just issue with it. I edit message when/if get more details


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