Doom9's Forum - View Single Post - 2-pass AVC H.264 encoding = 5% bitrate improvement over 1-pass?

mike23 · 25th January 2022, 10:26

I am thinking about the quality improvement when using a 2-pass AVC H.264 encoding vs 1-pass AVC H.264

In the past I read many recommendations for 2-pass encoding over only 1-pass.
So I use this 2-pass encoding during the last years.

When I compare now again the results I found hardly any quality differences.

Is this statement still true?

Is there a quality approximation similar to:

2-pass encoding at bitrate X = 1-pass encoding at bitrate (X + 5%)

with same other encoding parameters

?

25th January 2022, 10:26	#1 \| Link
mike23 Registered User Join Date: May 2003 Posts: 107	2-pass AVC H.264 encoding = 5% bitrate improvement over 1-pass? I am thinking about the quality improvement when using a 2-pass AVC H.264 encoding vs 1-pass AVC H.264 In the past I read many recommendations for 2-pass encoding over only 1-pass. So I use this 2-pass encoding during the last years. When I compare now again the results I found hardly any quality differences. Is this statement still true? Is there a quality approximation similar to: 2-pass encoding at bitrate X = 1-pass encoding at bitrate (X + 5%) with same other encoding parameters ?