[FFmpeg-user] Questions about w3fdif deinterlacing

Seth Parker csparker247 at gmail.com
Thu Jan 16 20:34:46 CET 2014

Visual inspection is what I've ended up doing. I didn't feel like adding
the two-pass idet check into my existing batch scripts only to find out
that I had destroyed some video down the line somewhere. This also confirms
how I thought idet works: it reads the whole stream and just reports what
it detected. That choppiness with my 59.94 footage is still strange,

*Seth Parker*
Video Editor | The University of Kentucky Vis Center
www.csethparker.com | www.vis.uky.edu

On Thu, Jan 16, 2014 at 2:26 PM, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:

> Seth Parker <csparker247 <at> gmail.com> writes:
> > Most suggestions said I had to visually inspect the
> > streams and selectively encode based on that.
> I strongly suggest that, the alternative is to first
> run idet filter to find out if the stream is interlaced
> and then do a second run with a deinterlace filter.
> Note that idet does not tell you if the stream is
> telecined, this currently still needs visual inspection
> (or a heuristic based on idet output).
> I may be wrong but I am not convinced that a frame-by-
> frame decision for deinterlacing makes sense.
> Carl Eugen
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