[FFmpeg-user] How can I use the fieldmatch filter to detelecine?

Andy Furniss andyqos at ukfsn.org
Wed Apr 17 23:57:18 CEST 2013

L. Lee wrote:
> I've developed a highly refined method for applying detelecine using
> MEncoder's pullup filter methods. I get excellent results using that
> method for the examples I'm including in this message. However, for
> reasons that are probably obvious, I'm now trying to get comparable
> results using ffmpeg.
> How can I use the fieldmatch filter to detelecine these excerpts to get
> better results using ffmpeg? This source (for both source 1 and source 2)
> is 720P. I don't see any difference in my results whether or not I use
> decimate in the filtergraph as shown in the 8.22.2 Examples
> (http://ffmpeg.org/ffmpeg-filters.html#toc-Examples-3). I've also included
> a slightly longer mpg-muxed version (source 2) which concludes with the
> source 1 excerpt. I get different results when encoding the longer
> mpg-muxed excerpt (detelecine seems correct, however some areas are
> pixilated, but only when encoding the longer excerpt) Although the
> included filtergraph for my source 2 command uses the shorter of the two
> examples provided in the 8.22.2 section of the documentation, I've tried
> both and can't observe any difference in the output.
> Here's my source 1:
> https://dl.dropboxusercontent.com/u/42718751/Blockyclip.zip
> Here's my output 1:
> https://dl.dropboxusercontent.com/u/42718751/Blockyclip_output.zip

This looks wrong - 12fps with frames duped.

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