>It also sets the interlaced and top_field_first fields of the AVFrame,
>except in the case of rawvideo!? Rawvideo output has some special
>handling.? I just committed a fix for it and verified the header field
>of yuv4mpeg output:

Thanks for looking into this so quickly!? I applied your patch locally, and 
indeed the header is correct now!

I'm not sure why I thought video_size was necessary...I guess I went so far 
down the rabbit hole yesterday, trying to get raw YUV output to work, that I 
lost track of what was necessary.? At first, my attempts to export raw YUV 
crashed out with no error message and a zero-length output file.? But it's 
working now, without my source-code patch.

>P.S.? please be aware that if you change the vertical resolution of an
>interlaced clip in any way, it is automatically deinterlaced because
>there is no field-aware scaler.

That's OK; if I need something like that, I can always use y4mscaler externally.

At some point, I think I'll figure out kdenlive's plugin API and write some 
glue code for mjpegtools-libs, so that all our video-processing tools can be 
used inside kdenlive.? That shouldn't be hard, and would be a nice addition.

Steven Boswell
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