[FFmpeg-user] Why does the 'detelecine' filter exist?

[Mark Filipak]

Why does the 'detelecine' filter exist? It is weak and clumsy.

The 'fieldmatch' filter followed by 'decimate' do a better job and are robust.

By continuing to carry obsolete filters, FFmpeg emasculates itself. That makes FFmpeg appear to be 
chaotic and ties up names that could be, should be reused to better effect.

The same could be written about many FFmpeg filters. Dump them, or create a "Legacy" category in the 
documentation and put them there. Also, include documentation in "Legacy" that shows how to replace 
the obsolete filters in existing scripts. Promote the best filters, not the worst.