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29th September 2013, 04:56 | #1 | Link |
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Join Date: Dec 2003
Posts: 253
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x264 aspect ratio question
been trying to use x264 encoder to generate .264 files readable by adobe encore for some simple bluray authoring and am making enough progress to be thinking about the next problem: aspect ratio.
i have material that is 4x3 1440x1080p with square pixels. i read someplace that the bluray spec only accepts 1920x1080. if that is true, what is the best way for me to conform this 4x3 material? can it be done directly in the x264 encoding process? what i want for projection is a pillarboxed image. thanks, BabaG |
29th September 2013, 08:28 | #2 | Link |
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Join Date: May 2006
Posts: 3,997
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I think you have to add left and right borders of 240 pixels width each, and encode at 1920x1080. Then you are safe.
Blu-ray accepts 1440x1080p but only for 16:9 DAR (Display Aspect Ratio). You may want to try 1440x1080 and encoded explicitely with --sar 1:1. It may work on some players, but I am afraid it's not blu-ray standard compliant. Last edited by Sharc; 29th September 2013 at 08:31. |
29th September 2013, 17:51 | #4 | Link |
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Join Date: May 2006
Posts: 3,997
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I doubt that one can add borders with x264 built-in filter options. I always use avisynth for this purpose, like:
AddBorders(240,0,240,0). Btw., out of curiosity I tried 1440x1080p 4:3 source with --sar 1:1 on various playback devices: - MPC-HC => ok - VLC => ok - WDT TV => ok - SONY standalone Blu-Ray Player + TV: => NOT ok. It always stretched the picture to DAR 16:9. I could not even manually force it to 4:3. |
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