Counld ffmpeg_plugin support HDR10?

[felixyangtw]

Hi:
I would like use SVT-HEVC to encode HDR10 Video. I found only the parameter -hdr, and it seems to signal the video is HDR. However, the parameters MaxCLL, MaxFALL, UseMasterDisplay, MasterDisplay ... etc are not defined in ffmpeg_plugin. Is it possible to add them in ffmpeg_plugin?

[tianjunwork]

Hi @felixyangtw, yes, we can expose them through ffmpeg. Meanwhile, could you verify your needs with these interfaces by the sample app? And let us know the cli?

[felixyangtw]

Hi:
I often use ffmpeg to do the HDR10 encoding because the HDR information are stored in the container and SEI message. By the way, dos SVT-HEVC support smpte 2084? I think HDR10 need it. The following is the example that I use ffprobe to probe a HDR10 Video.

Program 1
Stream #0:0[0x101]: Video: hevc (Main 10) ([36][0][0][0] / 0x0024), yuv420p10le(tv, bt2020nc/bt2020/smpte2084), 3840x2160 [SAR 1:1 DAR 16:9], 59.94 fps, 59.94 tbr, 90k tbn, 59.94 tbc
Stream #0:10x102: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 192 kb/s
felix@Felix-NB:~/prog_wor

[tianjunwork]

Hi, Below are the static settings in VUI if -hdr (HDR10) is set. https://github.com/OpenVisualCloud/SVT-HEVC/blob/master/Source/Lib/Codec/EbResourceCoordinationProcess.c#L392. I think SMPTE ST2048 is a typo which means SMPTE ST2084.
Please verify using the sample app if encoder provides all the interfaces you need for your work, before we expose anything through ffmpeg. Thank you. Encoder parameters

[felixyangtw]

Hi:
Thanks. I read https://github.com/OpenVisualCloud/SVT-HEVC/blob/master/Source/Lib/Codec/EbResourceCoordinationProcess.c#L392 and compare with HEVC standard. The code" vuiPtr->transferCharacteristics = 16" is right, but the standard says it is "SMPTE ST 2084", and this is FYI. I will use sample app to test and I hope can see the updated ffmpeg_plugin for HDR10 quickly. Thanks for your help!

[tianjunwork]

Sure, let us know the test result.