On 2021-03-05 11:13, James Darnley wrote:
On 05/03/2021, Mark Filipak (ffmpeg) <markfili...@bog.us> wrote:
I seek a fields-to-frames filter that does not add cosmetics. In my pursuit,
I look for such a
filter every time I peruse the filter docs for anything. I've yet to find
such a filter.
Do you know of a fields-to-frames filter that does not add cosmetics?
separatefields - "splits each frame into its components fields,
producing a new half height clip with twice the frame rate and twice
the frame count"
Yes, I could do (and have done) that, followed by 'shuffleframes=00', followed by 'tinterlace' [1].
But that seems like a lengthy (slow) way to do what should be a simple (faster) thing [2].
[1] [A+b] ==> [A][b] ==> [A][A] ==> [A+A]
[2] [A+b] ==> [A+A]
If you're curious about what I'm doing, look:
[A+a][B+c][C+d][D+d][D+d] ...SOURCE is a (consistent) mess [3]
[A+A][a+a][B+B][c+c][C+C][d+d][D+D][d+d][D+D][d+d] ...yadif=mode=send_field
[A+A][a+a][B+B][B+B][C+C][c+c][D+D][d+d] ...shuffleframes=0 1 2 2 4 3 6 7 -1
-1
[A+a][B+B][C+c][D+d] ...tinterlace=mode=interleave_bottom to make TARGET [4]
[3] Telecined (=30fps) ==> frame 1 discard (=24fps) ==> frame 3 repeat (=30fps).
[4] The TARGET is beautiful. No cosmetic filtering needed (or possible).
[A+a][B+c][C+d][D+d][D+d] ...SOURCE
[A][a][B][c][C][d][D][d][D][d] ...separatefields
[A][a][B][B][C][c][D][d] ...shuffleframes=0 1 2 2 4 3 6 7 -1 -1
[A+a][B+B][C+c][D+d] ...weave=first_field=top to make TARGET
Hmmm... That appears to work. I'll try it.
I guess I got stuck on using tinterlace as the last step and couldn't see that separatefields &
weave would be simpler (and faster) than yadif and without yadif's cosmetics.
Thanks!
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