[FFmpeg-devel] Bug in FFMPEG video filter TINTERLACE needs fixing

[Ben Hutchinson]

I was reading it directly from the official FFMPEG website.
https://ffmpeg.org/ffmpeg-filters.html
All the info about the TINTERLACE filter I got from reading the info there.

On Fri, Jul 10, 2020 at 2:14 AM Paul B Mahol <onemda at gmail.com> wrote:

> On 7/8/20, Ben Hutchinson <benhut1 at gmail.com> wrote:
> > According to the documentation on the TINTERLACE video filter, the filter
> > mode called MERGEX2 will "Move odd frames into the upper field, even into
> > the lower field, generating a double height frame at same frame rate."
> But
> > it doesn't do this, at least in some cases (not sure about all cases).
> The
> > first frame in a sequence should be considered frame one (an odd frame)
> for
>
> Where is this written?
>
> > the purpose of this interlacing algorithm. However, that is not what's
> > happening in my experience. At least with raw video (using "-f rawvideo")
> > it's treating the first frame as frame zero (an even frame) and thus my
> > first frame (which contains top-field data) ends up getting put into the
> > bottom-field of the output video, and this is messing up the output.
> Please
> > fix this.
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