Opening mp4 but only audio appears on timeline??

[provlima]

Im trying to open an mp4 file in Prem El21 and only the audio file opens on the timeline.

Its a good file because it opens/plays properly on all my video players.

Any suggestions as to what may be causing the problem?

[John T Smith]

I will GUESS that the video inside that file uses a codec that the program can't use

MP4 is a wrapper, what is inside YOUR wrapper - Exactly what is INSIDE the video you are editing?
Report back with the codec details of your file, use the program below
Free program to get file information for PC/Mac http://mediaarea.net/en/MediaInfo/Download
- a MediaInfo tutorial https://youtu.be/Ivy9ckSX1M0
- when you analyze your file in MediaInfo and post a screen shot in the forum, do so in TREE view
- post your information IN your message, not as an attachment that someone would have to download

[Bill Sprague]

What is the source of your video file?  Have clips from that source worked before?