Exactly what is INSIDE the video you are editing?
Report back with the codec details of your file, use the programs below... A screen shot works well to SHOW people what you are doing - For Windows Internet Explorer press the PRINT SCREEN button on your keyboard, and then do CTRL-V to paste the screen print from the clipboard into a forum message
Free programs to get file information for PC/Mac http://mediaarea.net/en/MediaInfo/Download
- when you analyze your file in MediaInfo and post a screen shot in the forum, do so in TREE view
I would check your import settings and double check how the footage was interpreted. "Perfectly good" can mean anything here.
What I mean by perfectly good is that it will play perfectly if I view it in VLC Media Player. Also, many of the videos come from the exact same source, that being Elgato Game Capture mp4 files. Some of said videos import fine, others have the problems I described earlier.
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many of the videos come from the exact same source, that being Elgato Game Capture
There is a known bug with Elgato acquired files. Sorry about that. Devs are working on a fix now.
Workaround: Try transcoding them in a previous version of Premiere Pro or Media Encoder. Add your comment and vote here: Can No Longer Import Elgato Game Capture HD MP4's – Adobe video & audio apps
Ah, that explains it. Thanks for the info.