Certain mp4 files unable to open/convert

Question

Hi All,

I have an editing job for which I get mp4 video files from someone that Premiere won't play. Turns out Media Encoder isn't able to convert them to a viewable codec either ("source compression type is not supported").

VLC player does play the files, and is able to convert them to an mp4 version that is playable in Premiere, but since VLC on the Mac has no batch conversion it's not very practical to use that.

I've attached a screenshot of the "media information" that VLC is able to show on one of those clips. Maybe someone can tell me why Premiere/Media Encoder can't play/convert them? Any tips on a batch converter that can?

Thanks!

Harald

Warren Heaton · Answer

Have you tried using macOS to convert the file?

Right-click and choose Services > Encode Selected Video File.

If you're using this as source, I'd go with Apple ProRes422 but that'll be about 1GB per minute at 1080p. Assuming this converts, it should work well in any Adobe video application (Premiere Pro, After Effects, Media Encoder, Predude, Audition, etc.).

You could also try "1080p" for a MP4. As an AV Foundation Frameworks created H264/AAC QuickTime, it should also work in any Adobe video application (but it's MP4).

As far as why it's playing in VLC player but not Premeire Pro/Media Encoder: The file is probably something that AV Foundation Frameworks supports (what Apple replaced QuickTime as system driver with) but Adobe Video/Audio does not.

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