Quantitizer Value In AutoMKV

[user12345]

Hi everybody,

I was curious as to what values everybody uses in Constant Quality mode. The default is 18 but if you lower it is there any improved quality? What is the sweet spot?

Thanks,
-Jesse

[LoRd_MuldeR]

Hi everybody,

I was curious as to what values everybody uses in Constant Quality mode. The default is 18 but if you lower it is there any improved quality? What is the sweet spot?

Thanks,
-Jesse

Yes, lower CRF values result in better quality and higher CRF values result in worse quality. But that's it!

There's no general rule: You will need to find the CRF value that satisfies your eyes. Try to find the highest CRF value that still looks good enough for you.

So if 18 is good for you, check whether 19 is still acceptable. Then check 20. And so on...

(Using an even lower CRF value than 18 would be noting but a waste of bitrate, if 18 already looks good four you)

[user12345]

Yes, lower CRF values result in better quality and higher CRF values result in worse quality. But that's it!

There's no general rule: You will need to find the CRF value that satisfies your eyes. Try to find the highest CRF value that still looks good enough for you.

So if 18 is good for you, check whether 19 is still acceptable. Then check 20. And so on...

(Using an even lower CRF value than 18 would be noting but a waste of bitrate, if 18 already looks good four you)

Thanks for your quick reply. Thats what I wanted to know. What value do you normally use? I realize that this value is subjective to the user's preference, but I am just curious as to what values everybody prefers. Thanks!

-Jesse

[wyti]

18 seems to be what most users found transparent.
But i know people that can see the difference until 15 and other who find 20 perfect.

[LoRd_MuldeR]

Thanks for your quick reply. Thats what I wanted to know. What value do you normally use? I realize that this value is subjective to the user's preference, but I am just curious as to what values everybody prefers. Thanks!

-Jesse

Most people seems to prefer something in the range between 18 and 24. I usually go with 22 for my SDTV captures.

And note that CRF also depends on other options. A certain CRF value will only result in similar quality for future results, if none other options are changed.

The CRF experience may also vary significantly between anime/cartoon and "real life" footage...

[user12345]

18 seems to be what most users found transparent.
But i know people that can see the difference until 15 and other who find 20 perfect.

Thanks! I think I might go with 16, as I have pretty good eyesight. One more quick question. If I choose copy original for the audio, does the program basically merge the untouched audio to the recently encoded video? Hopefully that makes sense. Once again, I really appreciate all help that has given. This forum has helped me learn a lot.

-Jesse

[user12345]

Most people seems to prefer something in the range between 18 and 24. I usually go with 22 for my SDTV captures.

And note that CRF also depends on other options. A certain CRF value will only result in similar quality for future results, if none other options are changed.

The CRF experience may also vary significantly between anime/cartoon and "real life" footage...

Actually I might stick with 18 seeing that some people choose 24 and still find it acceptable. I guess I will play around with it and see what looks best.

Thanks,
-Jesse

[wyti]

Actually I might stick with 18 seeing that some people choose 24 and still find it acceptable. I guess I will play around with it and see what looks best.

Thanks,
-Jesse

Yes that's the best things to do.
For the audio, yes the program simply remux the original audio track with the encoded video track

[user12345]

Thanks! I think I am all set to to begin encoding. Here is my process if someone could confirm that I am on the right track for backing up Blu-ray movies. I hate discs. AnyDvd Hd to m2ts. Tsmuxer to demux the m2ts to a video and audio file. Send the audio through eac3to to convert it to either ac3 or dts. Add the raw video and the dts or ac3 file to AutoMKV. Then encode the video to x264 and copy the original audio source. Does this sound about right?

[Blue_MiSfit]

Yep, sounds right to me.

~MiSfit

[buzzqw]

every tryed to feed the m2ts to automkv ?

BHH

[user12345]

No I haven't. Does that work? Oh and your program is great. Just the right amount of options, and easy to use.

[user12345]

Hey guys,
Sorry I have another question. What resize filter should I use for Bluray discs? Or should I use one at all? I know this is subjective also, but if you guys could give me some good examples that would be great. Thanks! I swear, this is my last question lol.

-Jesse

[Mangix]

lanczos or spline should give wonderful results

[user12345]

Okay. LanczosResize or Lanczosmtplus? I lied. Thats another question. Thanks.

[buzzqw]

lanczosresize when downsizing (from 1080p to 720p) lanczosmtplus when upscaling (from 720p to 1080p)

BHH

[user12345]

lanczosresize when downsizing (from 1080p to 720p) lanczosmtplus when upscaling (from 720p to 1080p)

BHH

So if I were to want 1080p from a 1080p source I would just select none?

[LoRd_MuldeR]

So if I were to want 1080p from a 1080p source I would just select none?

Uhm? Going from 1080p to 1080p means not resizing at all and hence doesn't need any (resize) filter. Anyway you should avoid resizing whenever possible...