[GUIDE] Newbie: Deinterlace with Hybrid

[Scipio75]

Good evening everyone

I am new to this forum and to Hybrid and I am in need of some help.

Initial situation

I used VirtualDub 1.9.11 to digitize my PAL VHS Videos. I used the Huffyuv v2.1.1 codec. Custom video format: 720 x 576, YUY2/YUV 4.2.2 interleaved.

What is my goal?

I would like to deinterlace my avi videos with Hybrid. I basically want everything else to stay as it is so I can further edit (denoise, mask overscan, etc.) the avi file with Vdub2. After that I plan to convert to mp4 with Handbrake. I would like a reasonably fast deinterlacer who combines speed with quality. I do not need the best so QTGMC seems to be the wrong one.

So far I did the following:

- Load my avi file
- Set Default Container to avi
- Named my output file
- Set video to "FFvHuff" (it seems to be the Huffyuv codec right?)
- Set Audio to "passthrogh all"

Now I am basically struck. Which deinterlacer should I use now? What settings do you recommend for a good result (if possible detailed as I have zero experience with deinterlacing)? How do I find out if my videos are BFF or TFF (I assumed BFF).

Thank you very much for your help.

Kind regards,

Fabian

[Selur]

Set video to "FFvHuff" (it seems to be the Huffyuv codec right?)

FFvHuFF is a based on HuffYUV, not exactly the same, but should work the same.

Which deinterlacer should I use now?

Hybrid will choose QTGMC(Fast) by default, if the source is detected as interlaced.
(You should enable Bob in QTGMCs settings.)

How do I find out if my videos are BFF or TFF (I assumed BFF).

Read: [INFO] Interlacing patterns.
Basic idea: Overwrite scan type to BFF / TFF check the pattern.

What you should do:

• Set the scantype
  
• Check the result / pattern with Vapoursynth Preview
  

Cu Selur

[Scipio75]

Thank you for your help. Furthernore thank you for developing Hybrid

I did not really understand where excately I see the details described in [INFO] Interlacing patterns (in the log?). However I deinterlaced the video with BFF and TFF. The BFF version did stutter quite a lot but the TFF version was just fine. Contrary to my belief my first video was TFF ...

I selected "bob". Are there other seetings that should be changed?

After deinterlacing my avi file is about 3x times larger. Is that normal? I would have expected about 2x because of the double amount of frames.

Kind regards,

Fabian

[Selur]

I did not really understand where excately I see the details described in [INFO] Interlacing patterns (in the log?).

You use the 'Vapoursynth Preview' and navigate through the frames of a scene with horizontal motion and look at whether there is motion or not.

However I deinterlaced the video with BFF and TFF. The BFF version did stutter quite a lot but the TFF version was just fine. Contrary to my belief my first video was TFF ...
[/quote|
When there is smooth motion and fixed pattern of duplicates, the source is TFF.

[quote]After deinterlacing my avi file is about 3x times larger. Is that normal? I would have expected about 2x because of the double amount of frames.

In the 'FFvHuff'-tab: use a color space, that matches your source. I suspect you left it at 4:4:4. (4:4:4 uses 33% more data)


Cu Selur

[Scipio75]

Ah yes … I see now how 'Vapoursynth Preview' works ... thanks! It takes quite a while until the video preview window loads (for bigger files). Is there a way to speed up so the preview window loads faster (just to check TFF or BFF)?

Your assumption was correct … I left it at 4:4:4 … problem solved … thanks again!

Here’s my sequence of what I will do:

1.       Digitize the VHS video with Vdub 1.9.11. Codec: Huffyuv v2.1.1.
2.       Deinterlace the avi with Hybrid. Codec: FFvHuFF
3.       Filter the video with Vdub 2 64 bit (Denoise, mask overscan, change color range to 16-235, etc.). Codec: Blackmagic SD 8-bit 4:2:2
4.       Convert to mp4. I first wanted to use Handbrake but now I will also use Hybrid.
 
-          Is this the correct sequence (Deinterlace before filtering in Vdub 2)?
-          I use three different codec for three steps. Is that a problem (quality, compatibility)?

Kind regards,

Fabian

[Selur]

I use three different codec for three steps. Is that a problem (quality, compatibility)?

Personally, I would do everything after the capturing in Hybrid, but if you are happy with the filtering in VirtualDub that is fine too.
About the codecs Huffyuv and FFvHuff are both losses so they are no problem, Blackmagic SD 8-bit 4:2:2 is not lossless, so I would not use it as intermediate. But if the loss caused by Blackmagic SD 8-bit 4:2:2 is fine for you, that should be no problem.

Is this the correct sequence (Deinterlace before filtering in Vdub 2)?

Only filtering you usually apply before deinterlacing usually might be de-rainbow filters.
So, the order is fine.

Cu Selur