Best Resize Filter For...

[ben45]

Hi

What is the best Avisynth resize filter for these bitrates (H264) :

1800kbps?

950kbps?

500kbps?

[El Heggunte]

1800, 950, 500 WHAT

bps, kbps, Mbps

Also, what's the video format you're talking about? MPEG-2, MPEG-4 ASP, H.264, HEVC, VC-1,
or something else?

Anyway...

according to the documentation, the more a filter sharpens the image, the less the result is compression-friendly
So, for low bitrates, BilinearResize should be the "best" choice.

[ben45]

1800, 950, 500 WHAT

bps, kbps, Mbps

Also, what's the video format you're talking about? MPEG-2, MPEG-4 ASP, H.264, HEVC, VC-1,
or something else?

Anyway...

according to the documentation, the more a filter sharpens the image, the less the result is compression-friendly
So, for low bitrates, BilinearResize should be the "best" choice.

Sorry. Edited first post

[jagabo]

There is no single answer for all videos. It depends on the nature of the individual video.

Generally, sharper resizing increases noise and detail and will require more bitrate. If your source isn't very sharp sharper resizing may look better. If your source is very sharp a sharp resize will create oversharpening halos. If your video has a lot of noise sharper resizing will increase the noise and require more bitrate.

A clean cartoon with a sharp resizer may look fine at 500 kbps. A grainy old movie will look pretty bad.

And, of course, you need to take into account the frame size and the frame rate. Large frame sizes and higher frame rates can require more bitrate.

[ben45]

There is no single answer for all videos. It depends on the nature of the individual video.

Generally, sharper resizing increases noise and detail and will require more bitrate. If your source isn't very sharp sharper resizing may look better. If your source is very sharp a sharp resize will create oversharpening halos. If your video has a lot of noise sharper resizing will increase the noise and require more bitrate.

A clean cartoon with a sharp resizer may look fine at 500 kbps. A grainy old movie will look pretty bad.

And, of course, you need to take into account the frame size and the frame rate. Large frame sizes and higher frame rates can require more bitrate.

Thankyou

Can i use psy-rd with Bilinear resizer to make picture semi-sharped?

Here's my profile setting

--pass 2 --bitrate 950 --stats ".stats" --deblock -1:-1 --keyint 240 --min-keyint 23 --b-pyramid none --ref 5 --chroma-qp-offset -2 --me umh --direct temporal --trellis 2 --psy-rd 1.0:0.35 --no-fast-pskip --qpmin 10 --qpmax 69 --output "output" "input"

Source is not sharp at all

[jagabo]

Bilinear is a softer resizer so it will blur the picture a bit and reduce noise. If your video is noisy you should consider reducing the noise before encoding to save more bitrate. Yes, psy-rd sacrifices a little accuracy in order to gain a little more compression.

[ben45]

Bilinear is a softer resizer so it will blur the picture a bit and reduce noise. If your video is noisy you should consider reducing the noise before encoding to save more bitrate. Yes, psy-rd sacrifices a little accuracy in order to gain a little more compression.

If i use spiline36 without changing size , will it sharp the picture?
I wanna use it as sharpening filter

[jagabo]

If i use spiline36 without changing size , will it sharp the picture?

No, it won't do anything. AviSynth only uses the resizer when the sizes are different. And don't bother resizing to a different size and back, it will only blur the details and create oversharpening halos.

[ben45]

If i use spiline36 without changing size , will it sharp the picture?

No, it won't do anything. AviSynth only uses the resizer when the sizes are different. And don't bother resizing to a different size and back, it will only blur the details and create oversharpening halos.

Oh

Do you know any filter that sharp picture like spline36?

Resized 1080p to 720p @ 950kbs
http://uploads.im/wVUuL.png
http://uploads.im/4I7qE.png

[manono]

Do you know any filter that sharp picture like spline36?

To sharpen a video you use a sharpening filter and you don't rely on the resizer to do it for you:

http://avisynth.nl/index.php/External_filters#Sharpeners

I use LimitedSharpenFaster most of the time, others LSFMod, others something else. Sharpening makes a video less compressible and might, if encoding for the same file size, make the video look worse than if you hadn't sharpened at all. Just judging from the pictures (a poor way to judge a video), it doesn't need to be sharpened.