FFmpeg

Command line notes

stream copy from mp4 to flv

Copy from mp4 container to flv container at 30 frames per second.

ffmpeg -i input.mp4 -acodec copy -r 30 -vcodec copy -f flv output.flv

encode to .mp4 with h264

This seems to work the resulting file plays in Quicktime, but doesn't play in jwplayer so probably still needs more tweaking.

ffmpeg.exe -i input.avi -ab 256kb -vcodec libx264 -b 1000kb -deinterlace output.mp4