[FFmpeg-user] Generating v210 uncompressed AVIs from v210 individual files in 720p and 1080i formats

Thomas Worth dev at rarevision.com
Fri Sep 2 16:07:52 CEST 2011

On Fri, Sep 2, 2011 at 6:50 AM, FrancoisMace <mace.francois at gmail.com> wrote:
> Hello Tim,
> Thanks for your quick answer.
> Indeed, my output image was specified as being 1920x540 since, when I
> specified 1920x1080, one hald of the ouptut AVI displayed completely green.
> So the command line was there in order to illustrate what I manage to get
> working, although what is slipping out of your mind correspond to what I
> have tried to get.
> The only notions of "interlacing" I found in the ffmpeg documentation seem
> to be related to the use of the AVC encoder/decoders which, since I am
> wanting to do an uncompressed AVI, do not interest me.

It sounds like you are trying to extract fields from an interlaced
video and convert them to progressive (50i --> 50p). Am I correct? If
so, I don't think it's as simple as scaling each field vertically to
1080 lines because you will get that jittery effect due to the fields
being out of "registration." If I remember correctly, there is a bob
filter in VirtualDub that will perform a shift to better align the
fields and get rid of most of the jitter. That's a necessary step, and
unless you do it prior to encoding with FFmpeg I don't think it'll
look right.

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