Selur's Little Message Board

Jut ugly compression artifacts,...

(20.10.2024, 07:58)Selur Wrote: [ -> ]"Filtering->Vapoursynth->Misc->Filter Order/Queue" read also [INFO] About Vapoursynth Filter Order/Queue in case you want to use  "Filter Queue" instead of "Filter Order".

Cu Selur

Hi, try some filter, put deinterlace, santiag, removegrain, deblock, In what order should I use them?
logically I put them as I wrote them...

Quote:Hi, try some filter, put deinterlace, santiag, removegrain, deblock, In what order should I use them?

Personally, I would use deblock after deinterlace or at least before removegrain to be sure the macroblock structure on which deblock filters work is as untouched as possible. But the 'best' order always depends on the source and the used deblocker. (i.e. machine learning based deblockers don't really work on the macroblock borders.)

Cu Selur

Sometime I try tdecimate and srestore to put down the framerate at 23.976 from 29.97, seems working in some files, but after can I put up again the FR for original smoothness?
How can I understand if files are telecined?

Quote:How can I understand if files are telecined?

You look for pattern if you bob the content, read: [INFO] Interlacing patterns

Quote:after can I put up again the FR for original smoothness?

You could add interpolated frames: "Filtering->Vapoursynth->Frame->Interpolation->Frame Interpolation" (on Mac, there are way less available methods for this, than on Windows, especially with a modern gpu and vs-mlrt or torch add-on).

Obviously: If you have a real 29.97fps source (with 29.97 unique non-blended frames) and you remove frames, you will lose motion smoothness and there is nothing you can do about it.

Cu Selur

Here what I need to do with that separated fields (2 fields per block) ? Also bob dont have smooth

Quote:Video
ID                            : 1
Format                        : MPEG Video
Format version                : Version 2
Format profile                : Main@Main
Format settings                : BVOP
Format settings, BVOP          : Yes
Format settings, Matrix        : Default
Format settings, GOP          : M=3, N=13
Format settings, picture struc : Field
Codec ID                      : V_MPEG2
Codec ID/Info                  : MPEG 1 or 2 Video
Duration                      : 11 min 8 s
Bit rate mode                  : Variable
Bit rate                      : 4 374 kb/s
Maximum bit rate              : 9 000 kb/s
Width                          : 720 pixels
Height                        : 480 pixels
Display aspect ratio          : 4:3
Frame rate mode                : Constant
Frame rate                    : 29.970 (30000/1001) FPS
Standard                      : NTSC
Color space                    : YUV
Chroma subsampling            : 4:2:0
Bit depth                      : 8 bits
Scan type                      : Interlaced
Scan type, store method        : Separated fields (2 fields per block)
Scan order                    : Top Field First
Compression mode              : Lossy
Bits/(Pixel*Frame)            : 0.422
Time code of first frame      : 01:29:11:17
Time code source              : Group of pictures header
GOP, Open/Closed              : Open
Stream size                    : 349 MiB (100%)
Default                        : Yes
Forced                        : Yes
Color range                    : Limited
Color primaries                : BT.601 NTSC
Transfer characteristics      : BT.601
Matrix coefficients            : SMPTE 240M
matrix_coefficients_Original  : BT.601

That does not indicate anything special and warrants no special handling.
I suspect the file is not interlaced, but telecined.
Look at what happens in the Vapoursynth Preview and compare it to [INFO] Interlacing patterns, then overwrite the scan type and adjust your interlace/telecine settings accordingly.


Cu Selur

Ok make some test and maybe found solution...try telecine at 23.976 and then frame interpolation with rife with fps factor 5/2 to 59.94..

But why if select FFV1 always have file with PAR 3:2 also if select 8:9 or other format?? 

I wouldn't add the frame interpolation, but if you need that frame rate use it.

Quote:But why if select FFV1 always have file with PAR 3:2 also if select 8:9 or other format??

Hybrid reads the PAR using MediaInfo if the there is no 'Input PAR', Hybrid assume 1:1.
If you know your input PAR (= pixel aspect ratio) isn't detected properly, you need to let Hybrid know the correct value for it to work properly.
3:2 usually is a DAR not a PAR.
Can't produce the effect that FFV1 always comes out with a 3:2 PAR, here at all:

Cu Selur

At me hybrid know 8:9 but become 3:2