Friday, 10 December 2010

Encode 3 D to 2 D in Avidemux "update"

3 D top/bottom to 2 D in Avidemux

The video explain the "how to" but I will upload some screenshots to help.
OS Ubuntu
go to this web page

Why 3 D to 2 D?
well this has made because I have too encode one movie sterioscopic "3 D" to 2 D my system is not good (I don't have all hardware). So I add to found a solution for encode 3 D to 2 D, I goggle it but only found how to encode (convert) to 2 D to 3 D. Them came to me the idea try this on MEgui, well the result has amazing, but this as made on Windows, and I want try to on Ubuntu in Avidemux, so I use the sample of to make this "how to".

"how to"
This is on Ubuntu 10.10 64bit this sample of the "how to" take 30min to encode on my laptop 2hz coredue 2GB memory, your miles may very.
Start, go to Applications, Sound & Video, Avidemux, (if you don't have this install it, using Software centre),
locate the file to encode (convert) by click on open,
the stereoscopic "3 D" look like this, we need change the video codec, audio & format, we want keep the quality so for video MPEG-4 AVC, audio AC-3, format MKV.
after you choose the video codec, you can use configure, for the encode,
encode by ["encode mode" (single or dual pass)], ["target size" (if is for a single dvd 4Gb], or ["quantizer" (big number to low, from 51 to 0, but 51 bad quality 0 best quality).
by default the max ref. frames are 3, but I use 4, don't go over 6, software like multiAVC will claim about it.
"filters" menu where we need change a few thing for the best end result,
on transform filter use resize, crop & resize but this is only necessary only like this case the sample is 3000x800 so resize first to 1280x720, them crop 640 & resize again to 1280x720,
                                           3000x800 to 1280x720

destination 16:9 and lanczos3, [on MEgui is lanczos4]
screenshot of correct sise 1280x720, now crop,
half of 1280 is 640 input that on with and click enter (return key),
choose from left or right to crop in to half,
them resize again to 1280x720, from the filters menu you have to use for this first resise MPayer,then crop and last resize with avisynth,

screenshot after all the settings apply,
save the file for Avidemux start the encode, my is avt.mkv, in Avidemux you have to add .mkv to the end of the file and after the encode  use the MKmerge to change the internal name of the file "tag" for the name that you want.
Mkmerge gui

in Mkmerge, file segment title, under global tab is "Avidemux", change for the name that you want or clear it, is up to you. MEgui you don't need do this, so that it I hope this will help someone.
The end result to compare here:


  1. Perfect, thats what I was searching for!
    Thank you!

  2. Which Avidemux version was used for this purpose?????

  3. The version I can't tell, but you can use the latest in my case is 2.5.4 to do this job, I hope this help.

  4. This is for side to side, what about top/bottom?

  5. The process is the same crop top/bottom and then resize to 1280x720 or 1920x1080 I hope this help you.

  6. fantastic this is what i needed. perfect video quality but unfortunately i have no audio :( I choose av3 (lav) what am I doing wrong? thnx for the feedback

  7. tried that one too but still no audio. (in the side by side version it does heve audio)

  8. Maybe you have a bug in Avimux try install it again or use another audio encoder, are you on linux or windows?

  9. Ok, is the audio ac3 or dts, if is ac3 in audio tab use copy, if is dts you will be better with a tool that can extract and convert to ac3 hope this help.

  10. Thanks for this tutorial.

    Here's what I figured you were trying to say:
    1. I opened a 3D side-by-side MKV file into avidemux on Centos6 using the command:
    2. AviDemux:File->Information showed the original file to be of the format:
    - Video Codec 4CC = AVC1/Image Size = 1920x1080
    - Audio Codec = DTS/Audio Channels = 6
    3. Since 1920 pixels divided in half is 960 pixels, I cropped to the left half using the command:
    Avidemux: Video->Filters->Transform->Crop->{top=0,bottom=0,left=0,right=960}
    4. I resized that cropped portion back to 1920 pixels using this command:
    Avidemux:Video->Filters->Transform->MPlayer resize->"+"->"Lock aspect ratio" was changed from "on" to "off" & "Resize Dimensions" were changed from 960x1080 to 1920x1080.
    5. I re-encoded the result using the command:
    Avidemux:File->Save->Save Video->Filename=2d.avi

  11. in case of side bt side just crop one side to 1000 pixels and uncheck the syn button than crop the up and down side synced with each other and than zoom or change aspect ratio