Editing MP4 Clip unreliable Behavior Camtasia 9

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  • Problem
  • Updated 9 months ago
  • (Edited)
When I attempt to cut an MP4 or trim, the video clip sequence is corrupted (UNDO usually restores). A Trim can turn a portion of the CLIP black during editor's playback. A cut can kill the sequence. I captured a Video from my iPad to MP4 (using an AirPlay recorder) and after cutting portion the frame sequence gets corrupted, where closing iPad APP occurs out of sequence. This adds hours to editing. I used to have similar issues with Camtasia 8 on MOV videos. This is killing productivity, and destroys the experience.
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SierraTech

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  • frustrated

Posted 2 years ago

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SierraTech

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Well, I never received an answer, but I did find a work around. I basically ran the original video through 'WinX HD Video Converter Deluxe'. I used iTunes (H264) Profile and converted the video to MP4 again. I replaced the video by Right-Clicking on Video Track, and chose, "Update Media' then navigated to the new clip. The result allowed me to CUT the video leaving frames after the CUT intact (no BLACK). So I'm not sure why the original MP4 gave me a headache, but it seems using a converter to wash the video did the trick.
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SierraTech

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Well, I had the same issue with MOV format.  The preview window lags and stutters when using MOV files from iPhone and CPU usage is 100%. Frame rate is fixed at 30 FPS and Bitrate is 14.7Mbps (H.264).

Guess I will have to wash (Convert MP4)  these video prior to importing them using 'WinX HD Video Converter Deluxe'.  Since iPhones are such a standard, I was hoping for better performance (my GPU is an NVIDIA Quadro 5010M). Computer is used for Adobe Premiere Pro editing using CUDA Cores. Looks like Camtasia 9 doesn't really take advantage of Hardware Acceleration.
(Edited)