[FFmpeg-user] 'streampatterns' -- a proposed stream structure filter

[Mark Filipak (ffmpeg)]

Does something like this scheme already exist? No? Can it be implemented?

Implementation example:
streampatterns=span=20:patterns=p c ccppp ccprp, split=5[p][c][ccppp][ccprp][else],
[p]select=eq(STREAM_PATTERN,p), ... progressive stream ...[prog],
[c]select=eq(STREAM_PATTERN,c), ... scan-interlace stream ...[scan],
[ccppp]select=eq(STREAM_PATTERN,ccppp), ... telecine stream ...[tele],
[ccprp]select=eq(STREAM_PATTERN,ccprp), ... oddball stream ...[oddball],
[else]select=not(eq(STREAM_PATTERN,p)+eq(STREAM_PATTERN,c)+eq(STREAM_PATTERN,ccppp)+eq(STREAM_PATTERN,ccprp)), 
... mutt streams ...[mutts],
[prog][scan][tele][oddball][mutts]interleave=nb_inputs=5

New filter: 'streampatterns', with directives: 'span=' & 'patterns='.
Usage example:
'streampatterns=span=20:patterns=p c ccppp ccprp'.

New flag: 'STREAM_PATTERN', with values dynamically defined by 'streampatterns' filter.
Examples for span==20:
     'p' : 'pppppppppppppppppppp'
     'c' : 'cccccccccccccccccccc'
'ccppp' : 'ccpppccpppccpppccppp'
'ccprp' : 'ccprpccprpccprpccprp'

New (partially existing?) flexable pattern detector that's configured at run time.

Heuristic comb, frame-repeat, and telecine detectors already exist.

Examples seen in the wild.

There's progressive video:
pppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppp
And scan-interlaced video:
cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc
And telecined video:
ccpppccpppccpppccpppccpppccpppccpppccpppccpppccpppccpppccpppccpppccppp
And there's regular oddballs, for example:
ccprpccprpccprpccprpccprpccprpccprpccprpccprpccprpccprpccprpccprpccprp
And then there's irregular mutts, for example:
ccpppcpppcppccppccppccppcpppcpppcpppcppprppcpppccprpcpppcpppcppccppccp

Yes, I do know that the secondary streams might need to fix up 'PTS's prior to 'interleave'.

-- 
Robotics will make bitcoin worthless. Why? Visualize millions of solar powered, self-replicating 
bitcoin miners. How much would they be worth? Bitcoin maintains marginal value solely via built-in 
inflation. That essentially makes bitcoin a Ponzi scheme, and it will be shut down by governments.