Google Chromecast compatible MP4s

[Paul Oldham]

I recently got a Chromecast and I'm using rygel[1] as a UPnP AV 
MediaServer controlled by BubbleUPNP[2] to server videos stored on my 
file server to my Chromecast. So far so good: it works a treat with 
content like VOBs off DVDs converted to MP4 with the aid of ffmpeg.

However is doesn't play MP4s straight out of get_iplayer (just using 
--get, no other flags). I've discovered I can fix this by using ffmpeg 
to re-encode but I was wondering if anyone had been this way before and 
was aware of a switch I could give to get_iplayer to make it produce 
MP4s which were Chromecast compatible straight of the box.

TIA
-- 
Paul

[1] https://wiki.gnome.org/Rygel
[2] 
https://play.google.com/store/apps/details?id=com.bubblesoft.android.bubbleupnp