[FFmpeg-user] Forcing interlaced handling

Mark Himsley mark at mdsh.com
Sun Feb 5 22:23:38 CET 2012

On 01/02/2012 23:34, Stefano Sabatini wrote:
> On date Wednesday 2012-02-01 13:39:38 +0000, Tim Nicholson encoded:
>> 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.
> Looks like -top is ignored on input.

I've asked that before:


I thought Michael said he was pushing a fix for it.


>> Does anybody have an idea how to force tff interlace handling?
> Uhm... try with the attached patch and tell if it works for you.

You've mentioned that before ;-)



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