The file is the OSS Elephant's dream movie : https://orange.blender.org/
Purposely tested with this for easy sharing.
Contained streams (ffmpeg -i ): 
    Stream #0:0: Video: msmpeg4v2 (MP42 / 0x3234504D), yuv420p, 1920x1080,
10002 kb/s, 24 fps, 24 tbr, 24 tbn, 24 tbc
    Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, 5.1(side), fltp,
448 kb/s

-profile:v 77  : I tested values and in the end found one in ffmpeg sources.
Are these values documented anywhere?

B-Frames : so basically VCE is useless in its B-Frame-less state?
I was hoping to create a tvheadend streaming server with live hw-accelerated
transcoding, is this at all possible with AMD VCE cards?