[FFmpeg-devel] [PATCH] avfilter: add framerate video filter

[Andy Furniss]

Carl Eugen Hoyos wrote:
> Robert Krüger <krueger <at> lesspain.de> writes:
>
>> The only other thing I noticed was that the stream seams to be
>> marked as interlaced when it comes out of the first il filter,
>> which causes warnings like these:
>>
>> [Parsed_framerate_1  <at>  0x7fa4e3426080] Interlaced frame found -
>> the output will not be correct.
>
> This sounds like an issue to me but we probably need an option for il
> to disable changing the interlaced flag if another usecase for the
> filter was found.

Isn't fields being marked as interlaced correct though?

I mean it's not progressive video that is produced, as each field is
offset by one line and anything that could process correctly, still
needs to know whether a field is top or bottom.

I don't know whether the framerate filter can handle fields or not, if
it can, there should be code that takes account of top/bottom. If there
isn't that code then I guess it really does need de-interlaced
progressive full height frames as input.