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Clips have different artifacts every time I preview them
Hello Community!
I’m getting in the door with a new client by offering to edit some existing footage that they recorded on a cheap USB webcam.
The video codec reports as avc1, and the files are in an mp4 wrapper. They are heavily artifacted. The weird thing is, the artifacts are different every time I play them from the library browser. One major issue is the whole frame turning green for several seconds, with a vague outline of the subject in different shades of green.
Does anyone have experience with this sort of thing?
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2 Replies
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[Jeff Feaz] “cheap USB webcam…video codec reports as avc1, and the files are in an mp4 wrapper. They are heavily artifacted. The weird thing is, the artifacts are different every time I play them from the library browser. One major issue is the whole frame turning green for several seconds, with a vague outline of the subject in different shades of green.”
I’ve seen that from some heavily-compressed codecs, but usually during VLC playback. Does it only happen in FCPX? If so what version of macOS and FCPX, and what Mac hardware? What about Quicktime 10 player, or Finder’s Quick Look (press space bar to play).
If it happens outside of FCPX, the file may be malformed due to a poor quality encoder or buffer overrun. You could try transcoding it with HandBrake, EditReady or VLC to something else. There are also video file repair tools. I have not used the one mentioned here, just mentioning it: https://www.stellarinfo.com/blog/repair-corrupt-video-file-vlc-media-player/
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Joe, thanks so much for your response.
The artifacting happens in other media players as well, including Quicktime and Finder, and the artifacts are different each time it’s played. I have tried transcoding with Handbrake…the transcodes have the same problems.
I’ll take a look at the link you posted. Thanks again!
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