Re: [FFmpeg-user] -vf Colorspace filter - 'Unknown input primaries 2' error

For note DCP's are typically 2.6 gamma encoded X'Y'Z'. Conversion to Rec 709 RGB might be as simple as linearise to XYZ and then convert to 709 using the primaries matrix and apply an appropriate transfer function for your new display environment, however for perceptual matching you may need to

Re: [FFmpeg-user] -vf Colorspace filter - 'Unknown input primaries 2' error

Hi Chris! On Fri, May 13, 2016 at 2:54 PM, Christoph Gerstbauer wrote: > Hi again, Kieran, > > sorry I meaned : "are the DPX logarithmic XYZ or linear XYZ? " > > Didnt mean RGB. > > Best Regards > Chris > These are not DPX at all, they are born digital Digital

Re: [FFmpeg-user] -vf Colorspace filter - 'Unknown input primaries 2' error

Hi, Kieran, are the DPX logarithmic RGB or linear RGB? In my esperience without using a 3DLUT -> The logarithmic scale of the RGB values always lead to washed out pictures, when transcoding to a linear scale. I think you need a 3DLUT (e.g CineonLOG) and the colorspace filter to get better

Re: [FFmpeg-user] -vf Colorspace filter - 'Unknown input primaries 2' error

Hi again, Kieran, sorry I meaned : "are the DPX logarithmic XYZ or linear XYZ? " Didnt mean RGB. Best Regards Chris Am 13.05.2016 um 12:46 schrieb Kieran O'Leary: Hello, I want to transcode a DCP to ProRes or x264 while transforming to bt709. I am experimenting with the colorspace filter,

Re: [FFmpeg-user] -vf Colorspace filter - 'Unknown input primaries 2' error

On 13 May 2016 12:26 p.m., "Paul B Mahol" wrote: > > > This is XYZ right? > > AFAIK colorspace filter doesn't support XYZ as input. > It is indeed XYZ. However when I transcode the DCP to libx264 without any filtering and the output file is yuv420p, the colorspace filter still

[FFmpeg-user] -vf Colorspace filter - 'Unknown input primaries 2' error

Hello, I want to transcode a DCP to ProRes or x264 while transforming to bt709. I am experimenting with the colorspace filter, as I've found that most DCPS that I've converted have low contrast and washed out colours. As some DCP players (EasyDCP) allow XYZ -> bt709 transforms, I wanted to see