[FFmpeg-user] Forcing interlaced handling

[Tim Nicholson]

I have some V210 files and in both .mov and .mxf wrapper do not seem to 
have any interlace flag settings, although I know them to be -tff.

I wish to convert them to dvvideo, however the fieldorder=bff filter 
only works if the source material is flagged as tff, which it is not.

I have tried various things, including using fieldorder=tff, 
fieldorder=bff so that the first filter does nothing but sets the flag, 
so that the second filter does what is required, but this failed.

I have also tried using -top before the input file, but this too did 
nothing, as did using a scale filter with scale=iw:ih:1.

Does anybody have an idea how to force tff interlace handling?
-- 
Tim

http://www.bbc.co.uk/
This e-mail (and any attachments) is confidential and may contain personal views which are not the views of the BBC unless specifically stated.
If you have received it in error, please delete it from your system.
Do not use, copy or disclose the information in any way nor act in reliance on it and notify the sender immediately.
Please note that the BBC monitors e-mails sent or received.
Further communication will signify your consent to this.