[FFmpeg-user] DOWN CONVERSION ISSUE: From MXF (1080i AVC Intra) - MBAFF "interlacing" to DVCPRO

[Iban Garcia]

Exact!!

But the issue *has been solved* using next:
 -vf "scale=720:576:interl=1,fieldorder=tff" -vcodec dvvideo

I think ffmpeg should "detect" the interlaced without "interl=1" option.

Many thanks, Tim!!!


2012/3/26 Tim Nicholson <nichot20 at yahoo.com>

> On 26/03/12 11:34, Iban Garcia wrote:
> > Umm... it does not work for me. The output.dv is still "progressive"
> > (de-interlaced): both fields of output.dv file are equal. The interlacing
> > has been lost...
> >
>
> OK so something is not working as it should. I have had a look at some of
> my
> H264 10bit interlaced material and that is also behaving as you describe.
> The
> source is definitely interlaced, as can be seen from the interlace
> artifacts in
> a resized ffplay window. But the output is a blend of the two fields.
>
> I will try and get some more details and then raise a bug report.
>
> > I have download and installed "ffmbc". I am doing some test now with it.
> > But, by the moment, all of the tests has the same "de-interlaced"
> output...
> > :-(((
> >
> >
> > 2012/3/26 Tim Nicholson <nichot20 at yahoo.com>
> >
> >> On 25/03/12 15:43, Iban Garcia wrote:
> >>> Hi,
> >>>
> >>> I have taken from git the last version of ffmpeg. And I have made next
> >>> test. The output.dv fields are not interlaced. The interlaced
> information
> >>> has been lost in the process.
> >>>
> >>> # ffmpeg -y -threads 8 -i input.mxf -s 720x576 -pix_fmt yuv411p -aspect
> >>> 16:9 -an -r 25 -vf "setfield=1, fieldorder=bff" output.dv
> >>
> >>> [..]
> >>
> >>> sws_param:
> >>> [fieldorder @ 0x646e80] output field order: bff
> >>> [scale @ 0x6283a0] w:1920 h:1080 fmt:yuv422p10le sar:1/1 -> w:720 h:576
> >>> fmt:yuv411p sar:64/45 flags:0x4
> >>>
> >>
> >> As your source is HD and you wish to output SD, you should really scale
> the
> >> material properly using the "scale" filter with interlacing turned on.
> >>
> >> Something like:-
> >>
> >> ffmpeg -y -threads 8 -i input.mxf \
> >> -vf "setfield=1, scale=720:576:1, fieldorder=bff" \
> >> -pix_fmt yuv411p -aspect 16:9 -an -r 25 output.dv
> >>
> >> --
> >> Tim
> >> _______________________________________________
>
> --
> Tim
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