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13th February 2016, 13:06 | #1 | Link |
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Join Date: Jul 2015
Posts: 3
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Mp4box changes resolution when using chroma 444
Hello.
Seems like there is a problem when muxing .264 files to .mp4 if the original .264 video uses chroma 4:4:4 (8 or 10 bit). I have a video of 1000x800 resolution uncompressed .avi bgr24 and I did some tests: .avi to .264 commands after pass 1: Code:
x26410.exe ^ --pass 2 ^ --profile high444 ^ --preset slow ^ --output-csp i444 ^ --range pc ^ --fps 30 ^ --sar 1:1 ^ --stats "C:\testshit.stats" ^ --bitrate 6000 ^ --output testshit44410bit.264 "C:\testshit.avi" - .264 video -> no problem -muxing it with Mp4box -> no problem Using x264 (8 or 10 bit) and using profile high444 and using --output-csp i444: - .264 video -> no problem -muxing it with Mp4box -> problem (changes width to 992 and, for example, MPC-HC reports resolution as "1000x800 (RdA 31:25)" 992x800.) I have tested with mp4box version that comes with MP4BOXGUI 0606, mp4box rev563 and rev1180 using this commands: Code:
-add "C:\testshit44410bit.264:fps=30.000:delay=0:name=testshit44410bit.264" -itags tool="My MP4Box GUI 0.6.0.6 <http://my-mp4box-gui.zymichost.com>" -brand mp42 -new "C:\testshit44410bit.mp4" Hope someone can help. Last edited by codexredestemp; 13th February 2016 at 13:12. |
13th February 2016, 13:21 | #2 | Link |
Registered User
Join Date: Dec 2002
Posts: 5,565
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Yes, the cropping calculation seems to be wrong when sub-sampling is not 4:2:0 and dimensions are not mod16.
If you want to make sure the developers see it create a ticket on their bug tracker: https://github.com/gpac/gpac/issues |
Tags |
10bit, 444, 8bit, chroma, mp4box |
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