General: Omxplayer seems to only play as much video as exists when it starts.
Details: Two computers on a local network. On the server (Hauppauge HD-PVR), I start up "cat /dev/video0 > aaa.mpg" (to an NFS shared folder). 15 seconds later on the client, I start up "omxplayer /mnt/xxx/aaa.mpg" (same shared file). Omxplayer plays the video for 15 seconds and quits. It does not seem to update the video duration "on the fly".