请教1080i的视频反交错的问题

[siyangfei]

请教下各位菊苣，一部1080i的29.97fps的记录片有的地方完全没有交错，而有的地方是规律的3帧交错+3帧不交错，这样的应该如何做反交错处理啊？

[mawen1250]

这种基本就是PAL转NTSC导致的field blending（用SeparateFields检查场上是不是有blending即可确认），常见于某些BBC的纪录片，我一般都是用QTGMC+srestore做de-blending并且还原25fps。

[siyangfei]

再请教下mawen菊，我用QTGMC把源BOB到59.94fps再用srestore(frate=25.000, omode="pp3")为何还原不到25fps啊？是哪里错了吗？srestore的用法不是很了解，望指教

[mawen1250]

omode
Srestore can be used as blend-decimation-function, as simple deblend-function and for double-blend-removal
1 - deblend-mode 1 -> detected blends will be replaced with the previous frame
2 - deblend-mode 2 -> next frame is used instead of the detected blend
3 - deblend-mode 3 -> detected blends will be replaced with the neighbour that has the smaller difference
4 - deblend-mode 4 -> use the neighbour with the smaller blend-possibility
5 - deblend-special -> outputs the one of four frames with the smallest blend-possibility
>5 - blend-decimation -> for all decimation operations
The output-modes 1-5 are simple deblending modes, so the framerate will not change.

To enable the double-blend-removal you have to set a string for omode. This string decides about the
postprocessing mode that is used on the restored frames:
pp0 -> the fastest mode, no postprocessing
pp1 -> use difference masking, higher quality and still good speed
pp2 -> use a special blurring mask on luma and chroma that reduces artefacts
pp3 -> combines postprocessing 1 and 2 -> slowest
You can add also your own postprocessing to these modes. Just add your function like this:
omode="pp3.blur(1)" -> pp3 + blurring
If you want to add a function with its own inputstrings use three quotation marks:
omode="""pp2.deen("a2d")"""

Important Note: Also the double-blend-removal does no decimation. It's created only for double-blends
caused by blenddeinterlacing of telecined sources. You have to add an decimation
function for full restoring:
source #progressive
srestore(dmode=-4,omode="pp0")
decimate(cycle=5,quality=0) #recommed decimating
Default - 6