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• aarch64 : vvc : Fix compilation of alf.S with MSVC 2022 17.7 and older

  23 juillet 2024, par Martin Storsjö

  aarch64 : vvc : Fix compilation of alf.S with MSVC 2022 17.7 and older
  Use the "ldur" instruction explicitly, instead of having the
  
  assembler implicitly convert "ldr" instructions to "ldur".
  This fixes build errors like these :
  libavcodec\aarch64\vvc\alf.o.asm(1023) : error A2518 : operand 2 : Memory offset must be aligned
  
          ldr             q22, [x3, #24]
  
  libavcodec\aarch64\vvc\alf.o.asm(1024) : error A2518 : operand 2 : Memory offset must be aligned
  
          ldr             q24, [x2, #24]
  
  libavcodec\aarch64\vvc\alf.o.asm(1393) : error A2518 : operand 2 : Memory offset must be aligned
  
          ldr             q22, [x3, #24]
  
  libavcodec\aarch64\vvc\alf.o.asm(1394) : error A2518 : operand 2 : Memory offset must be aligned
  
          ldr             q24, [x2, #24]
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] libavcodec/aarch64/vvc/alf.S

• Nginx RTMP "Server Error : No Such Stream"

  7 août 2024, par Tony Ruth

  I am trying to capture and stream video within my network 10.100.64.1/24 using libnginx-mod-rtmp. I followed a tutorial. I used the same URL for publishing and playing : rtmp ://10.100.64.4/lab/test But the player does not find the stream.

  


  My nginx settings :

  


  rtmp {

    server {

        listen 1935;
        chunk_size 4096;
        allow publish 127.0.0.1;
        allow publish 10.100.64.4/24;
        deny publish all;
        allow play 127.0.0.1;
        allow play 10.100.64.4/24;
        deny play all;

        application lab {

            live on;
            idle_streams off;
            record all;
            record_path /media/HLEV/GoPro/Raw;
            record_unique on;
        } 
    }
} 


  


  The server lives on 10.100.64.4, so I published a video using ffmpeg :

  


  ffmpeg -stream_loop -1 -re -i MyVideo.flv -c:v copy -c:a aac -ar 44100 -ac 1 -f flv -flvflags no_duration_filesize rtmp://10.100.64.4/lab/test


  


  The publishing looks good. Last line of the above command :

  


  frame=54030 fps= 60 q=-1.0 size=  119584kB time=00:15:01.00 bitrate=1087.3kbits/s speed=   1x 


  


  And I can see that the video is being saved locally from the record block of the nginx settings.

  


  Then I try to play the stream using ffplay :

  


  ffplay -i rtmp://10.100.64.4/lab/test
ffplay version 5.1.5-0+deb12u1 Copyright (c) 2003-2024 the FFmpeg developers
  built with gcc 12 (Debian 12.2.0-14)
  configuration: --prefix=/usr --extra-version=0+deb12u1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --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-sdl2 --disable-sndio --enable-libjxl --enable-pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm --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
[rtmp @ 0x7fe7940015c0] Server error: No such stream=    0B f=0/0   
rtmp://127.0.0.1/lab/test: Operation not permitted
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0 


  


  ffplay does not find the stream.

  


  I can observe both the publish and play commands by examine the access log of nginx :

  


  sudo tail -2 /var/log/nginx/access.log 
10.100.64.4 [07/Aug/2024:12:24:56 -0500] PUBLISH "lab" "test" "" - 45365243 529 "" "FMLE/3.0 (compatible; Lavf59.27" (5m 36s)
10.100.64.4 [07/Aug/2024:12:25:03 -0500] PLAY "lab" "test" "" - 368 412 "" "LNX 9,0,124,2" (0s)


  


  I have tried using different video streams (directly from a webcam instead of from ffmpeg). I have also tried using different players (VLC instead of ffplay).

  


  How do I connect to the stream ?
Do you need different URLs for publishing versus playing ? The way I understood it, publishing is on port 1395 and playing is on port 80, so there is no conflict with using the same URL.
Is there a way to list the currently active streams on my server ?

  


• swscale/x86/yuv2rgb : add ssse3 yuv42{0,2}p -> gbrp unscaled colorspace converters

  6 août 2024, par Ramiro Polla

  swscale/x86/yuv2rgb : add ssse3 yuv420,2p -> gbrp unscaled colorspace converters
  Note : this implementation is limited to x86_64 due to general purpose
  
        register pressure.
  checkasm —bench on an Intel(R) Core(TM) i5-5300U CPU @ 2.30GHz :
  
  yuv420p_gbrp_8_c : 118.5
  
  yuv420p_gbrp_8_ssse3 : 93.3
  
  yuv420p_gbrp_128_c : 1068.3
  
  yuv420p_gbrp_128_ssse3 : 319.3
  
  yuv420p_gbrp_1080_c : 8841.8
  
  yuv420p_gbrp_1080_ssse3 : 2211.8
  
  yuv420p_gbrp_1920_c : 15903.8
  
  yuv420p_gbrp_1920_ssse3 : 3814.3
  
  yuv422p_gbrp_8_c : 144.8
  
  yuv422p_gbrp_8_ssse3 : 93.8
  
  yuv422p_gbrp_128_c : 1395.8
  
  yuv422p_gbrp_128_ssse3 : 313.0
  
  yuv422p_gbrp_1080_c : 11551.5
  
  yuv422p_gbrp_1080_ssse3 : 2240.8
  
  yuv422p_gbrp_1920_c : 20585.3
  
  yuv422p_gbrp_1920_ssse3 : 5249.5
  
  yuva420p_gbrp_8_c : 117.5
  
  yuva420p_gbrp_8_ssse3 : 92.0
  
  yuva420p_gbrp_128_c : 1593.0
  
  yuva420p_gbrp_128_ssse3 : 319.3
  
  yuva420p_gbrp_1080_c : 8694.5
  
  yuva420p_gbrp_1080_ssse3 : 2186.0
  
  yuva420p_gbrp_1920_c : 15946.5
  
  yuva420p_gbrp_1920_ssse3 : 3805.3
  

  • [DH] libswscale/x86/yuv2rgb.c
  • [DH] libswscale/x86/yuv_2_rgb.asm