Re: [FFmpeg-devel] MPlayer and QuickTime fourcc 'raw '

2016-01-13 Thread Mats Peterson 

On 01/13/2016 09:06 AM, Mats Peterson wrote:

slightly misleading, since it says that the 'raw ' fourcc stands for
"Uncompressed RGB". However, below are two files with the 'raw ' fourcc


I suppose what they mean by "uncompressed RGB" here is just a way to 
differentiate it from uncompressed YUV422, etc. A palettized file is 
"uncompressed RGB" as well, just that the RGB values are in the palette 
and not in the video samples themselves.


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[FFmpeg-devel] MPlayer and QuickTime fourcc 'raw '

2016-01-13 Thread Mats Peterson 
MPlayer seems to naively assume that a QuickTime file (or Matroska file 
with V_QUICKTIME, for that matter) with the video fourcc 'raw ' contains 
24-bit RGB video data. The QuickTime File Format Specification is 
slightly misleading, since it says that the 'raw ' fourcc stands for 
"Uncompressed RGB". However, below are two files with the 'raw ' fourcc 
from Apple's QuickTime Beta CD that are *not* 24-bit RGB, but 1-bit and 
8-bit files. FFplay handles this correctly, but MPlayer currently does 
not. When playing the 8-bit sample file below for example, it plays 
without video, and it constantly spits out "Frame too small! 
(19200<76800) Wrong format?" lines which is clearly an indication that 
it thinks the data is 24-bit RGB when it is in fact 8-bit. Now this is 
not exactly related to FFmpeg, but I know several of you guys are 
working on MPlayer as well, that's why I wanted to mention it.


1-bit sample:
https://drive.google.com/open?id=0B3_pEBoLs0fabm83dG5YLUsybDA

8-bit sample:
https://drive.google.com/open?id=0B3_pEBoLs0fadHF2U1JFZ3NSdjQ

Mats
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