Re: [FFmpeg-devel] [PATCH] avcodec/exr: add cineon lin2log trc

2020-03-06 Thread Carl Eugen Hoyos
Am Fr., 6. März 2020 um 22:11 Uhr schrieb Paul B Mahol : > > On 3/6/20, Carl Eugen Hoyos wrote: > > Am Fr., 6. März 2020 um 00:25 Uhr schrieb : > > > >> +AVCOL_TRC_CINE_LIN2LOG = 19, ///< Default Cineon/DPX linear to log 1D > >> curve > > > > Isn't it possible to use a random large number here

Re: [FFmpeg-devel] [PATCH] avcodec/exr: add cineon lin2log trc

2020-03-06 Thread Paul B Mahol
On 3/6/20, Carl Eugen Hoyos wrote: > Am Fr., 6. März 2020 um 00:25 Uhr schrieb : > >> +AVCOL_TRC_CINE_LIN2LOG = 19, ///< Default Cineon/DPX linear to log 1D >> curve > > Isn't it possible to use a random large number here? No, because that would be big hack on top of big pile of hacks that e

Re: [FFmpeg-devel] [PATCH] avcodec/exr: add cineon lin2log trc

2020-03-06 Thread Carl Eugen Hoyos
Am Fr., 6. März 2020 um 00:25 Uhr schrieb : > +AVCOL_TRC_CINE_LIN2LOG = 19, ///< Default Cineon/DPX linear to log 1D > curve Isn't it possible to use a random large number here? Carl Eugen ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http

Re: [FFmpeg-devel] [PATCH] avcodec/exr: add cineon lin2log trc

2020-03-06 Thread Gonzalo Garramuño
El 06/03/20 a las 16:33, Mark Reid escribió: You would perhaps be better creating a specialist filter and implementing it using OCIO (as suggested https://github.com/AcademySoftwareFoundation/tac/tree/master/gsoc), or extending the current 3D LUT code to read Cinespace or other 3D LUT formats t

Re: [FFmpeg-devel] [PATCH] avcodec/exr: add cineon lin2log trc

2020-03-06 Thread Mark Reid
On Fri, Mar 6, 2020 at 5:03 AM Kevin Wheatley wrote: > On Fri, Mar 6, 2020 at 10:19 AM Hendrik Leppkes > wrote: > > AVColorTransferCharacteristic should follow ISO/IEC 23001-8 and its > > following standards (ISO/IEC 23091 I believe). Not sure we have a > > solution for specialized variants, but

Re: [FFmpeg-devel] [PATCH] avcodec/exr: add cineon lin2log trc

2020-03-06 Thread Kevin Wheatley
On Fri, Mar 6, 2020 at 10:19 AM Hendrik Leppkes wrote: > AVColorTransferCharacteristic should follow ISO/IEC 23001-8 and its > following standards (ISO/IEC 23091 I believe). Not sure we have a > solution for specialized variants, but adding one right there would > collide with the next addition to

Re: [FFmpeg-devel] [PATCH] avcodec/exr: add cineon lin2log trc

2020-03-06 Thread Hendrik Leppkes
On Fri, Mar 6, 2020 at 12:25 AM wrote: > > From: Mark Reid > > Hi, > The following patch adds a cineon lin2log color transfer characteristic to > exr. > The purpose of this patch is to allow preserving of the dynamic range of an > exr file when converting to DPX or when using video filter such a

Re: [FFmpeg-devel] [PATCH] avcodec/exr: add cineon lin2log trc

2020-03-06 Thread Paul B Mahol
On 3/5/20, mindm...@gmail.com wrote: > From: Mark Reid > > Hi, > The following patch adds a cineon lin2log color transfer characteristic to > exr. > The purpose of this patch is to allow preserving of the dynamic range of an > exr file when converting to DPX or when using video filter such as 3d