Howdy all,

A number of researchers at our institution use devices that take time
sequence photos and transmit the images to software that converts these to
AVI. In general, it's pretty straightforward. However, we are encountering
cases where the AVI files created on Macs don't play properly in VLC player
-- only a single frame displays while the progress bar moves. They work
fine in Windows Media Player.

I tried converting the files using the syntax:

 avconv -i test.avi -c copy test.mp4


which resulted in a file that worked great in VLC, but then Windows Media
Player complains that it can't support the file type or might not support
the codec. I then tried:

avconv -i test.avi -c:v libx264 -c:a copy test.mp4


and wound up with the original problem (works fine in Windows Media Player,
but not in VLC). If I upload one of these files to youtube and download the
mp4, it works fine everywhere.

What am I missing? Our researchers generate a lot of these files, so this
would be a good problem to solve. Thanks,

kyle