Chapter Thumbnails are white when movie is 4k

[Joerg]

I have the issue, that the Thumbnails are white. This only happend, when the Movie is 4k. Her are the Infos of the Codec:

Format : HEVC Format/Info : High Efficiency Video Coding Format profile : Main 10@L5.1@High Codec ID : V_MPEGH/ISO/HEVC Width : 3 840 pixels Height : 2 160 pixels Display aspect ratio : 16:9 Color space : YUV Chroma subsampling : 4:2:0 (Type 2) Bit depth : 10 bits Color range : Limited Color primaries : BT.2020 Transfer characteristics: PQ Matrix coefficients : BT.2020 non-constant Mastering display color primaries : R: x=0.680000 y=0.320000, G: x=0.265000 y=0.690000, B: x=0.150000 y=0.060000, White point : x=0.312700 y=0.329000 Mastering display luminance : min: 0.0000 cd/m2, max: 1000.0000 cd/m2

[Damiano Galassi]

It's a bug in AVFoundation, needs to wait for Apple to fix it.