[FFmpeg-devel] blended telecine... possible?

[Paul B Mahol]

On 9/5/19, Mark Filipak <markfilipak.windows+ffmpeg at gmail.com> wrote:
> On 09/04/2019 03:09 AM, Kieran Kunhya wrote:
>> On Wed, 4 Sep 2019, 07:34 Kieran O Leary, <kieran.o.leary at gmail.com>
>> wrote:
>>
>>> Hi,
>>>
>>> On Wed, 4 Sep 2019, 04:09 Mark Filipak, <
>>> markfilipak.windows+ffmpeg at gmail.com> wrote:
>>>
>>>> No one has responded. What does that indicate? Lack of interest? Lack of
>>>> knowledge? Lack of time? Shunning of anyone who's not a current
>>> developer?
>>>>
>>>
>>> You didn't wait very long for a reply, also you wrote to the development
>>> list which is purely for posting patches/new code. You should write to
>>> ffmpeg-user instead.
>>>
>>
>> It would help if you also explained the notation you are using.
>
> It is a notation I cooked up to uniquely describe all the myriad types
> of streams. Feel free to poach it.
>
> [...] - an output field (note: no '/')
> [.../...] - an output frame (note: '/')
> [A] - a field that contains the odd lines from a source frame 'A'.
> [a] - a field that contains the even lines from a source frame 'A'.
> [A/a] - a frame that contains interleaved lines from fields [A] & [a].
>
> i30-telecast =
> [A][a][B][b][C][c][D][d][E][e]
> // 10 discrete fields as they come from an NTSC camera. It represents
> 1/6th second of stream.
>
> p24 =
> [A/a][B/b][C/c][D/d]
> // 4 frames (1/6th second) as they are sampled from film.
>
> i30-telecine =
> [A][a][B][b][B][c][C][d][D][d]
> // 10 fields (1/6th second) of telecined film frames (2-3 pull-down).
>
> p30-telecine =
> [A/a][B/b][B/c][C/d][D/d]
> // 5 frames (progressive) of telecined film frames.
>
> p30-telecine-blend
> [A/a][AB/b][BC/bc][C/cd][D/d]
> // 5 frames (progressive) of telecined film frames that have been
> blended as follows:
>
> [A/a] - the untouched frame0 of the film.
> [AB/b] - a synthesized frame that takes the even lines from film [b] but
> takes the odd lines from film [A] & film [B] by interleaving samples:
> ABABAB...
> [BC/bc] - a synthesized frame that interleaves even lines from bcbcbc...
> and odd lines from BCBCBC...
> [C/cd] - well, you probably catch on by now...
>
> My question is: Can ffmpeg do p30-telecine-blend? and if so, what lib
> has it and how do I invoke it? I have looked at 'fieldhint', but it
> can't interleave samples (aka: pixels). It solely can assemble an output
> frame from input fields.
>

Dunno why you need blended telecine.
But normal telecine is available via telecine filter in libavfilter.