[FFmpeg-user] Creating CBR and Interlaced video

[Andy Furniss]

Kosta Vlotis wrote:

> video encoded for broadcast TV standards needs to be interlaced. just
> running some tests.

You are testing with h264 - I don't know about any where else, but in 
the UK the BBC will broadcast h264 with progressive frame set.

That's only HD for SD they still use mpeg2 and everything is flagged as 
interlaced.

I can't claim to be any sort of expert so may well be wrong, but I 
expect the only time you would need to use tinterlace would be for 
progressive source that is at field rate. If it's already interlaced 
then you can feed the encoder weaved frames, if progressive at 1/2 field 
rate then I expect there is a way to get it encoded as interlaced 
without messing around with tinterlace (if you really need to do that at 
all for h264).