I'm trying to convert an mp4 video to play on a digital photo frame. The photo frame (Living Image Li1210) manual states:
The digital photo frame can playback MPEG1, MPEG2, MPEG4, and AVI (dependant upon codec) video formats.
And in the FAQs: The device only works with the avi/mpeg4 files taken by most digital cameras. It is also capable of playing some compressed AVI files, such as DivX and XviD videos... The best supported resolution of a photo or video is 480x234.
I've tried various options with ffmpeg such as
ffmpeg -i in.mp4 -vcodec mpeg4 -vf scale=480x234 out.avi
but can't seem to get anything but a blank screen on the photo frame.
Any help or advice would be greatly appreciated.