Same Qz as input

[naszdom]

I came across
https://www.avidemux.org/admWiki/doku.php?id=tutorial:guide_to_encoding_types
when I was looking for something else. 

It mentions Same Qz as input as being useful for modifying an existing encoded file.  Just right for hard subtitles I thought.  However I just cannot find it in the configuration of version 2.6.21.  Does it exist in the Windows version for MKV files?

[Jan Gruuthuse]

You are confusing container formats (mp4, mkv) with MPEG-4 encoding (h263, h264, ...)

mkv can contain a MPEG-4 encoded video

[naszdom]

The attached is what I see. I am not too concerned about the container. It could easily be an MP4 container.

What I want to do is "extract the 1-pass analysis information already stored in the video frames and reuse it, effectively avoiding a whole pass and saving time." as in the tutorial.  But I do not see how to set it for "Same Qz as input"

[eumagga0x2a]

In most cases, especially with hw accel enabled, Avidemux doesn't get the quantizing info from video. I don't think that this approach is viable.

[naszdom]

So does that mean that the avidemux admwiki needs correcting? (see link in first post)

[eumagga0x2a]

I can only guess that the article targeted xvid/divx as codec and was written with Avidemux 2.5.x in mind. Since then a lot of water has flowed under the bridge.

I'm not into the Avidemux wiki.

[naszdom]

Thanks for the clarification.

[Jan Gruuthuse]

Time permitting the main developer does update the Wiki for big changes.

As you're using x264, this would be the place to look: guide_to_encoding_types ââ,¬Â¢ doctop ââ,¬Â¢ h.264
Qz is not mentioned there.

[naszdom]

Thanks - that will keep me going for a while.

[mean]

yes, it dates xvid/divx era
With more recent codecs we dont get that info at all