Wrong color range when using -vcodec h264_v4l2m2m in raspi3b+

[idevc]

I tried capture the screen on raspi3b, using commands:

ffmpeg -video_size 1920x1080 -framerate 5 -f x11grab -i :0.0 -vcodec h264_v4l2m2m -b:v 10000000 output_v4l2m2m.mp4

ffmpeg -video_size 1920x1080 -framerate 5 -f x11grab -i :0.0 -vcodec libx264 -b:v 10000000 output_libx264.mp4

ffmpeg version 5.1.4-0+rpt1+deb12u1 Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 12 (Debian 12.2.0-14)
  configuration: --prefix=/usr --extra-version=0+rpt1+deb12u1 --toolchain=hardened --incdir=/usr/include/aarch64-linux-gnu --enable-gpl --disable-stripping --disable-mmal --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libglslang --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librist --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sand --enable-sdl2 --disable-sndio --enable-libjxl --enable-neon --enable-v4l2-request --enable-libudev --enable-epoxy --libdir=/usr/lib/aarch64-linux-gnu --arch=arm64 --enable-pocketsphinx --enable-librsvg --enable-libdc1394 --enable-libdrm --enable-vout-drm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-libplacebo --enable-librav1e --enable-shared
  libavutil      57. 28.100 / 57. 28.100
  libavcodec     59. 37.100 / 59. 37.100
  libavformat    59. 27.100 / 59. 27.100
  libavdevice    59.  7.100 / 59.  7.100
  libavfilter     8. 44.100 /  8. 44.100
  libswscale      6.  7.100 /  6.  7.100
  libswresample   4.  7.100 /  4.  7.100
  libpostproc    56.  6.100 / 56.  6.100

Encoding log with libx264

d3@raspberrypi:~/projects/ffmpeg $ ffmpeg -video_size 1920x1080 -framerate 5 -f x11grab -i :0.0 -vcodec libx264 -b:v 10000000 output_libx264.mp4 > libx264.log
ffmpeg version 5.1.4-0+rpt1+deb12u1 Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 12 (Debian 12.2.0-14)
  configuration: --prefix=/usr --extra-version=0+rpt1+deb12u1 --toolchain=hardened --incdir=/usr/include/aarch64-linux-gnu --enable-gpl --disable-stripping --disable-mmal --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libglslang --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librist --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sand --enable-sdl2 --disable-sndio --enable-libjxl --enable-neon --enable-v4l2-request --enable-libudev --enable-epoxy --libdir=/usr/lib/aarch64-linux-gnu --arch=arm64 --enable-pocketsphinx --enable-librsvg --enable-libdc1394 --enable-libdrm --enable-vout-drm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-libplacebo --enable-librav1e --enable-shared
  libavutil      57. 28.100 / 57. 28.100
  libavcodec     59. 37.100 / 59. 37.100
  libavformat    59. 27.100 / 59. 27.100
  libavdevice    59.  7.100 / 59.  7.100
  libavfilter     8. 44.100 /  8. 44.100
  libswscale      6.  7.100 /  6.  7.100
  libswresample   4.  7.100 /  4.  7.100
  libpostproc    56.  6.100 / 56.  6.100
[x11grab @ 0x556e8f9610] Stream #0: not enough frames to estimate rate; consider increasing probesize
Input #0, x11grab, from ':0.0':
  Duration: N/A, start: 1705414547.931401, bitrate: 331776 kb/s
  Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1920x1080, 331776 kb/s, 5 fps, 1000k tbr, 1000k tbn
File 'output_libx264.mp4' already exists. Overwrite? [y/N] y
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0x556e903510] using cpu capabilities: ARMv8 NEON
[libx264 @ 0x556e903510] profile High 4:4:4 Predictive, level 4.0, 4:4:4, 8-bit
[libx264 @ 0x556e903510] 264 - core 164 r3095 baee400 - H.264/MPEG-4 AVC codec - Copyleft 2003-2022 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=4 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=5 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=10000 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'output_libx264.mp4':
  Metadata:
    encoder         : Lavf59.27.100
  Stream #0:0: Video: h264 (avc1 / 0x31637661), yuv444p(tv, progressive), 1920x1080, q=2-31, 10000 kb/s, 5 fps, 10240 tbn
    Metadata:
      encoder         : Lavc59.37.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/10000000 buffer size: 0 vbv_delay: N/A
frame=   28 fps=6.9 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=15 drop=0 speed=   0x    

[q] command received. Exiting.

frame=   29 fps=2.1 q=-1.0 Lsize=    2456kB time=00:00:05.20 bitrate=3869.7kbits/s dup=15 drop=0 speed=0.381x    
video:2455kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.049402%
[libx264 @ 0x556e903510] frame I:1     Avg QP: 0.00  size:1086806
[libx264 @ 0x556e903510] frame P:7     Avg QP: 0.55  size:203098
[libx264 @ 0x556e903510] frame B:21    Avg QP: 4.05  size:   233
[libx264 @ 0x556e903510] consecutive B-frames:  3.4%  0.0%  0.0% 96.6%
[libx264 @ 0x556e903510] mb I  I16..4: 50.2% 10.2% 39.6%
[libx264 @ 0x556e903510] mb P  I16..4:  3.2%  0.0%  6.6%  P16..4:  9.2%  0.5%  0.6%  0.0%  0.0%    skip:79.9%
[libx264 @ 0x556e903510] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  1.8%  0.0%  0.0%  direct: 0.0%  skip:98.2%  L0:26.4% L1:73.6% BI: 0.0%
[libx264 @ 0x556e903510] final ratefactor: -5.80
[libx264 @ 0x556e903510] 8x8 transform intra:6.2% inter:50.6%
[libx264 @ 0x556e903510] coded y,u,v intra: 49.6% 45.6% 48.1% inter: 0.5% 0.7% 0.9%
[libx264 @ 0x556e903510] i16 v,h,dc,p: 82%  9%  7%  3%
[libx264 @ 0x556e903510] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 32% 13% 48%  2%  1%  1%  1%  1%  2%
[libx264 @ 0x556e903510] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 35% 22% 22%  2%  3%  4%  4%  3%  4%
[libx264 @ 0x556e903510] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x556e903510] ref P L0: 91.9%  0.4%  6.3%  1.4%
[libx264 @ 0x556e903510] ref B L0: 89.4% 10.6%
[libx264 @ 0x556e903510] ref B L1: 99.7%  0.3%
[libx264 @ 0x556e903510] kb/s:3466.73

Encoding log with v4l2m2m

d3@raspberrypi:~/projects/ffmpeg $ ffmpeg -video_size 1920x1080 -framerate 5 -f x11grab -i :0.0 -vcodec h264_v4l2m2m -b:v 10000000 output_v4l2m2m.mp4
ffmpeg version 5.1.4-0+rpt1+deb12u1 Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 12 (Debian 12.2.0-14)
  configuration: --prefix=/usr --extra-version=0+rpt1+deb12u1 --toolchain=hardened --incdir=/usr/include/aarch64-linux-gnu --enable-gpl --disable-stripping --disable-mmal --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libglslang --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librist --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sand --enable-sdl2 --disable-sndio --enable-libjxl --enable-neon --enable-v4l2-request --enable-libudev --enable-epoxy --libdir=/usr/lib/aarch64-linux-gnu --arch=arm64 --enable-pocketsphinx --enable-librsvg --enable-libdc1394 --enable-libdrm --enable-vout-drm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-libplacebo --enable-librav1e --enable-shared
  libavutil      57. 28.100 / 57. 28.100
  libavcodec     59. 37.100 / 59. 37.100
  libavformat    59. 27.100 / 59. 27.100
  libavdevice    59.  7.100 / 59.  7.100
  libavfilter     8. 44.100 /  8. 44.100
  libswscale      6.  7.100 /  6.  7.100
  libswresample   4.  7.100 /  4.  7.100
  libpostproc    56.  6.100 / 56.  6.100
[x11grab @ 0x55acefc600] Stream #0: not enough frames to estimate rate; consider increasing probesize
Input #0, x11grab, from ':0.0':
  Duration: N/A, start: 1705414660.475717, bitrate: 331776 kb/s
  Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1920x1080, 331776 kb/s, 5 fps, 1000k tbr, 1000k tbn
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (h264_v4l2m2m))
Press [q] to stop, [?] for help
[h264_v4l2m2m @ 0x55acf06500]  <<< v4l2_encode_init: fmt=121/-1
[h264_v4l2m2m @ 0x55acf06500] Using device /dev/video11
[h264_v4l2m2m @ 0x55acf06500] driver 'bcm2835-codec' on card 'bcm2835-codec-encode' in mplane mode
[h264_v4l2m2m @ 0x55acf06500] requesting formats: output=BGR4 capture=H264
Output #0, mp4, to 'output_v4l2m2m.mp4':
  Metadata:
    encoder         : Lavf59.27.100
  Stream #0:0: Video: h264 (avc1 / 0x31637661), bgr0(progressive), 1920x1080, q=2-31, 10000 kb/s, 5 fps, 10240 tbn
    Metadata:
      encoder         : Lavc59.37.100 h264_v4l2m2m
frame=   20 fps=5.6 q=-0.0 size=     256kB time=00:00:03.60 bitrate= 582.6kbits/s speed=1.01x    

[q] command received. Exiting.

frame=   21 fps=5.2 q=-0.0 Lsize=     431kB time=00:00:04.00 bitrate= 882.0kbits/s speed=0.993x    
video:430kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.208601%

And I've got different result. When the screen captured using libx264 everything looks fine. But when i capture the screen using h264_v4l2m2m the colors totally broken (I attach the original screenshot how it should like, and 2 videos of the capture)