[FFmpeg-user] How to get HDR metadata inside my AV1 video?

[Robin van der Linden]

Hey folks,

I'm trying to reencode a 10 Bit HEVC to 10 Bit AV1 while keeping the HDR 
metadata intact.
Sadly, I don't see any HDR metadata with VLC at the reencoded AV1 clip. 
The only thing I see are very cold looking colors, have a look at my 
encode command:

/usr/bin/ffmpeg -i "/tmp/VODProcessing/Test (2022) - [2160p UHD].m4v"  
-map 0:0 -c:v libsvtav1 -b:v 7864320 -maxrate:v 8257536 -bufsize 
31457280 -vf zscale=width=3840:height=2160 -svtav1-params 
"input-depth=10:fast-decode=1:color-primaries=9:transfer-characteristics=16:matrix-coefficients=9:mastering-display=G(0.265,0.69)B(0.15,0.06)R(0.68,0.32)WP(0.3127,0.329)L(4000.0,0.005):content-light=368,226:enable-hdr=1" 
-pix_fmt yuv420p10le -color_trc smpte2084 -max_muxing_queue_size 1024 
-profile:v main -preset 6 -crf 16 -strict experimental -bf 0 -tune 
fastdecode -force_key_frames "expr:gte(t,n_forced*2)" -keyint_min 48 
-use_timeline 1 -use_template 1 -map_metadata -1 -map_chapters -1 
-sc_threshold 0 -f hls -seg_duration 4 -hls_time 4 -streaming 1 
-hls_list_size 0 -hls_segment_filename "/tmp/VODProcessing/output/Test 
(2022) - [2160p UHD]/v-av01-2160p-av01.0.12H.10/f-%04d.m4s"  
-hls_fmp4_init_filename "init-v-av01-2160p-av01.0.12H.10.m4s"  
-hls_segment_type fmp4 -hls_playlist_type vod -movflags 
frag_keyframe+frag_every_frame+write_colr+prefer_icc+skip_trailer+faststart 
-hls_flags independent_segments "/tmp/VODProcessing/output/Test (2022) - 
[2160p UHD]/v-av01-2160p-av01.0.12H.10/master.m3u8"

Can somebody give me a hint why the SVT-AV1 encoder does not take the 
information?

-- 
Grüße / Kind regards,

Robin van der Linden