[FFmpeg-user] Problems with opening some DPX files
ffmpeg at rgbaz.eu
Mon Mar 30 09:36:50 CEST 2015
On 25-03-15 10:01, Christoph Gerstbauer wrote:
>> Hi Christoph,
>> after a little search these are my findings
>> ffmpeg throws a packing error at you" "Packing 2 is not implemented"
>> According to the DPX v2 specs packing 2 is 8 bit values:
>> The origin of your DPXs as stated in the header is a Scanity, which can
>> do 8 bits scans. This might be the origin of the issue.
>> 8 Bit data values are not supported in ffmpeg (and not very well
>> in any program as far as I know):
>> lines 141-144
>> Here's a bit more info about 8 bit image data issues in the DPX specs:
>> I see a black and white image in Nuke which sort of confirms the storage
>> of RGB channels in one value.
>> The skew in the image is probably caused by a mismatch in image width
>> and pixel aspect ration (which says it's 2048x2048)
> Hello Arno, now I got the information that these DPX files are in
> 10bit GRAYSCALE (which is not supported by ffmpeg or any other
> programm I know).
> The usecase for that format is to scan a black and white filmrole with
> 10bit grayscale.
> Do you know: Is it on the roadmap that ffmpeg will support this
> non-commong grayscale format?
> Best Regards
I'm not in any position to speak about ffmpeg's roadmap,
so I have no idea if this is planned.
To be honest I don't see any reason why a specific option for
greyscale should be added. You can consider any RGB scan
as a triple channel greyscale format.
For instance, you could scan to the red channel only to store
a greyscale format.
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