When applying aspect ratio and re-encoding in x264 something strange happens? Or did I misunderstand this feature?
1:1
4:3
16:9
Each clip approximate 7 MB!
original clip 720p 16:9 : test.mkv
Re-encoded 1:1 aspect ratio: test11.mp4
Re-encoded 4:3 aspect ratio: test43.mp4
Re-encoded 16:9 aspect ratio: test169.mp4
Looks to be working properly. The aspect ratio is not of the video itself, but rather of the individual pixels.
The predefined aspect ratios will work properly if you have a 720x480 resolution video and would like the aspect ratio to be either 4:3, or 16:9 for NTSC. They will also work if you have a 720x576 resolution video and would like the aspect ratio to be either 4:3 or 16:9 for PAL.
Thanks for pointing this out. That figures. Got caught out by Predifined Aspect Ratio Forgetting it was still under Pixel Aspect Ratio (PAR)
Quote from: KoolAidMan on December 21, 2012, 06:17:24 PMThe predefined aspect ratios will work properly if you have a 720x480 resolution video and would like the aspect ratio to be either 4:3, or 16:9 for NTSC. They will also work if you have a 720x576 resolution video and would like the aspect ratio to be either 4:3 or 16:9 for PAL.
The predefined aspect ratios are wrong.
For 4:3 PAL the correct pixel aspect ratio is 12:11 and for 16:9 PAL the correct P.A.R. is 16:11.
For example if you have a 720x576 PAL image with a Display Aspect Ratio of 4:3 and you use a PAR of 16:15 then you get an image of (720x576)*(16/15)= 768x576.
768/576 = 4/3 = 1.333333...
BUT. What about the Nominal analogue blanking (http://nominalanalogueblanking) ? (the two vertical black stripes)
The black stripes on the left and right of the video are not part of the 4:3 image.
So with a P.A.R. of 12:11 you have : (720x576)*(12/11)= 785x576