[MEncoder-users] -VF FIELD=0 and BFRAMES=3 problem

[Bill Crockett]

I decided to experiment with the deinterlace method of extracting and 
encoding only one of the two fields using -VF FIELD=0.Being PAL format, 
I halved the vertical resolution from 720x576 to 720x288 using crop and 
scale appropriately.The -ovc I use is x264 and with my options setting 
this has BFRAMES=3.All this worked well produced a progressive, 25 fps 
file and plays well in MPlayer.

However, when playing the video in other players, the video flickers and 
jerks as though frames are missing.After much experimenting and trying 
different encoding options, I stumbled upon BFRAMES being the 
problem.reducing BFRAMES=0 fixed it.All players now can play it properly.

Using MPLayer, I looked hard but could not see any difference having 
BFRAMES=3 or BFRAMES=0.Are they really necessary or is this an MEncoder 
only problem?