Question / Help Playback of screen recording is choppy when skipping to a different time.

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chrissy_a

New Member
I've got a screen recording which I made through OBS and when I play it through VLC or edit it in Camtasia, the picture is fine when I play it through, but when I pause and resume, or skip ahead in time, the picture goes grey, and for a few seconds I can only see stuff which is moving, before I can see the whole picture again. Has anybody else experienced this? Is it a problem with the recording config?

(I tried uploading the log as in the guide but, although the message said 'Upload successful' I didn't get an URL, so I've uploaded it as a file.)
 

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GamerHD

Member
The frames in recordings are not standalone frames, what you are seeing is only differences of previous frames for few frames. Keyfeames are frames which will render a full frame again and they happen every couple seconds depending on the settings.
I had that for myself also but only while recording with QuickSync in .flv format. I used ffmpeg to simple convert it to .mp4 without reencoding and the final .mp4 had every time I choose to playback from normal.
 
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chrissy_a

New Member
Hi GamerHD, thanks for the reply. I did the screen recording in mp4 but it was still like this. I used Handbrake to create another mp4 (of lower quality) and the issue went away.
 
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GamerHD

Member
I wanted to use Handbrake also but I did not want to reencode the video, which takes time, so I used ffmpeg to copy video into another video without reencoding. Worth a try, even if it is mp4 to mp4 if you can't be bothered to wait for handbrake for each video.
 
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chrissy_a

New Member
So you're saying that the video has to go through this process of being copied so that it goes from being a keyframed video with 'difference' frames to a smoother video? Is that correct?
 
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GamerHD

Member
You can put it that way (even it will stay keyframed, it will somehow connect them all so when you choose a playback time, it will read of it to find the matching keyframe and then render the difference for the selected frame) is what I experienced, yes.
 
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chrissy_a

New Member
How does one copy a video in ffmpeg? I can't even get the exe file to open. Does it just run from the command prompt?
 
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GamerHD

Member
You can get the ffmpeg.exe on ffmpeg.org for windows.
Cmd command for copying the container without reencoding: "
ffmpeg -i input.flv -codec copy output.mp4"
Note you can try mp4 to mp4, or mp4 to flv and then to mp4 again.
 
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chrissy_a

New Member
Hmm, I got ffmpeg working and converted mp4 to mp4 but it still faced that same issue in vlc and camtasia. Maybe the quality is too high and my computer can't handle the quality? Or maybe it's the players which can't handle it?
 
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