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    Une file d’attente stockée dans la base de donnée
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    21 juin 2013, par

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  • Xubuntu ffmpeg screen capturing very slow when no display connected

    8 décembre 2022, par fre_der

    I use ffmpeg on an Intel Nuc with Xubuntu 22.04 (XFCE4, lightdm), with x11grab for screen capturing the desktop, and sending output to a multicast UDP stream (which is shown on different IPTV sets in the network).
The system uses autologin, and autostarts Firefox in kiosk mode, rendering a html5 video.

    


    Everything works fine when a display is attached, but from the moment the hdmi cable is detached, the output video is extremely slow (very shaky, looks like 1 fps, audio is OK although it has occasional hickups).

    


    CPU and memory usage doesn't seem to be affected whether a display is attached or not.

    


    This runs fine on Xubuntu 18.04, although there might be small config changes that I'm not aware of.

    


    To be able to display output when no display is attached, I created a VIRTUAL1 display :

    


    xrandr -d :0 --verbose --newmode "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync
xrandr -d :0 --verbose --addmode VIRTUAL1 "1920x1080_60.00"


    


    my /usr/share/X11/xorg.conf.d/20-intel.conf looks like :

    


    Section "Device"
  Identifier "Intel Graphics"
  Driver "intel"
  Option "VirtualHeads" "1"
  Option "TearFree" "true"
  Option "TripleBuffer" "true"
  Option "DRI" "false"
EndSection


    


    The ffmpeg command :

    


    ffmpeg -r 25 -thread_queue_size 512 -f x11grab -s 1920x1080 -i :0 -thread_queue_size 512 -f alsa -i default -c:a mp2 -f mpegts udp://239.255.255.8:50000?pkt_size=1316


    


    (during trial/error I tested various ffmpeg command line options to no avail)

    


    Output with hdmi cable attached :

    


    ffmpeg version 4.4.2-0ubuntu0.22.04.1 Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 11 (Ubuntu 11.2.0-19ubuntu1)
  configuration: --prefix=/usr --extra-version=0ubuntu0.22.04.1 --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-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --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 --enable-pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  WARNING: library configuration mismatch
  avcodec     configuration: --prefix=/usr --extra-version=0ubuntu0.22.04.1 --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-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --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 --enable-pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared --enable-version3 --disable-doc --disable-programs --enable-libaribb24 --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libtesseract --enable-libvo_amrwbenc --enable-libsmbclient
  libavutil      56. 70.100 / 56. 70.100
  libavcodec     58.134.100 / 58.134.100
  libavformat    58. 76.100 / 58. 76.100
  libavdevice    58. 13.100 / 58. 13.100
  libavfilter     7.110.100 /  7.110.100
  libswscale      5.  9.100 /  5.  9.100
  libswresample   3.  9.100 /  3.  9.100
  libpostproc    55.  9.100 / 55.  9.100
[x11grab @ 0x55f1fdfa18c0] Stream #0: not enough frames to estimate rate; consider increasing probesize
Input #0, x11grab, from ':0':
  Duration: N/A, start: 1670501458.257764, bitrate: 1658880 kb/s
  Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1920x1080, 1658880 kb/s, 25 fps, 1000k tbr, 1000k tbn, 1000k tbc
Guessed Channel Layout for Input Stream #1.0 : stereo
Input #1, alsa, from 'default':
  Duration: N/A, start: 1670501459.560180, bitrate: 1536 kb/s
  Stream #1:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native))
  Stream #1:0 -> #0:1 (pcm_s16le (native) -> mp2 (native))
Press [q] to stop, [?] for help
Output #0, mpegts, to 'udp://239.255.255.8:50000?pkt_size=1316':
  Metadata:
    encoder         : Lavf58.76.100
  Stream #0:0: Video: mpeg2video (Main), yuv420p(tv, progressive), 1920x1080, q=2-31, 200 kb/s, 25 fps, 90k tbn
    Metadata:
      encoder         : Lavc58.134.100 mpeg2video
    Side data:
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A
  Stream #0:1: Audio: mp2, 48000 Hz, stereo, s16, 384 kb/s
    Metadata:
      encoder         : Lavc58.134.100 mp2
frame= 1041 fps= 25 q=31.0 Lsize=   12451kB time=00:00:41.56 bitrate=2454.3kbits/s speed=1.01x
video:9955kB audio:1920kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 4.847125%
Exiting normally, received signal 2.


    


    Output without hdmi cable attached :

    


    ffmpeg version 4.4.2-0ubuntu0.22.04.1 Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 11 (Ubuntu 11.2.0-19ubuntu1)
  configuration: --prefix=/usr --extra-version=0ubuntu0.22.04.1 --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-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --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 --enable-pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  WARNING: library configuration mismatch
  avcodec     configuration: --prefix=/usr --extra-version=0ubuntu0.22.04.1 --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-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --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 --enable-pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared --enable-version3 --disable-doc --disable-programs --enable-libaribb24 --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libtesseract --enable-libvo_amrwbenc --enable-libsmbclient
  libavutil      56. 70.100 / 56. 70.100
  libavcodec     58.134.100 / 58.134.100
  libavformat    58. 76.100 / 58. 76.100
  libavdevice    58. 13.100 / 58. 13.100
  libavfilter     7.110.100 /  7.110.100
  libswscale      5.  9.100 /  5.  9.100
  libswresample   3.  9.100 /  3.  9.100
  libpostproc    55.  9.100 / 55.  9.100
[x11grab @ 0x56325816a8c0] Stream #0: not enough frames to estimate rate; consider increasing probesize
Input #0, x11grab, from ':0':
  Duration: N/A, start: 1670501334.907900, bitrate: 1658880 kb/s
  Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1920x1080, 1658880 kb/s, 25 fps, 1000k tbr, 1000k tbn, 1000k tbc
Guessed Channel Layout for Input Stream #1.0 : stereo
Input #1, alsa, from 'default':
  Duration: N/A, start: 1670501336.193971, bitrate: 1536 kb/s
  Stream #1:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native))
  Stream #1:0 -> #0:1 (pcm_s16le (native) -> mp2 (native))
Press [q] to stop, [?] for help
Output #0, mpegts, to 'udp://239.255.255.8:50000?pkt_size=1316':
  Metadata:
    encoder         : Lavf58.76.100
  Stream #0:0: Video: mpeg2video (Main), yuv420p(tv, progressive), 1920x1080, q=2-31, 200 kb/s, 25 fps, 90k tbn
    Metadata:
      encoder         : Lavc58.134.100 mpeg2video
    Side data:
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A
  Stream #0:1: Audio: mp2, 48000 Hz, stereo, s16, 384 kb/s
    Metadata:
      encoder         : Lavc58.134.100 mp2
frame= 1020 fps= 26 q=31.0 Lsize=   11802kB time=00:00:40.72 bitrate=2374.3kbits/s speed=1.02x
video:9378kB audio:1873kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 4.892235%
Exiting normally, received signal 2.


    


    xrandr output with display connected (if no display connected then DP1 just says disconnected as the other outputs)

    


    Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767
DP1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 530mm x 300mm
   1920x1080     60.00*+  74.97    50.00    59.94
   1920x1080i    60.00    50.00    59.94
   1680x1050     59.88
   1280x1024     75.02    60.02
   1440x900      59.90
   1280x960      60.00
   1280x720      60.00    50.00    59.94
   1024x768      75.03    70.07    60.00
   832x624       74.55
   800x600       72.19    75.00    60.32    56.25
   720x576       50.00
   720x480       60.00    59.94
   640x480       75.00    72.81    66.67    60.00    59.94
   720x400       70.08
DP2 disconnected (normal left inverted right x axis y axis)
DP3 disconnected (normal left inverted right x axis y axis)
DP4 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1920x1080_60.00  59.96*
VIRTUAL2 disconnected (normal left inverted right x axis y axis)


    


  • Yet another ffmpeg/libx264 issue

    26 décembre 2013, par kerim yucel

    My current situation is ; ffmpeg and libx264 has been compiled for Android, as shared and static libraries respectively. Since I have libx264.a and libffmpeg.so with me, only thing that remains is to link them and obtain a ffmpeg library that would allow me to proceed with my application. However, some questions remain unanswered. I am using Ubuntu with a virtual machine under Windows 7. I am using x264’s last version, ffmpeg 0.10.4 release and NDK 7.

    I have tried to adjust flags (extracf and extrald) in order to include libx264 to ffmpeg compilation process as well, however I keep failing. Below you may find my build script for ffmpeg and the errors I have encountered.

    NDK=~/Android_NDK_r7b 
    
PLATFORM=$NDK/platforms/android-8/arch-arm/ 
    
PREBUILT=$NDK/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86 
    
x264=/usr/local 
    
#x264v2=~/x264 
    
function build_one 
    
{ 
    
./configure --target-os=linux \ 
    
    --prefix=$PREFIX \ 
    
    --enable-cross-compile \ 
    
    --extra-libs="-lgcc" \ 
    
    --arch=arm \ 
    
    --cc=$PREBUILT/bin/arm-linux-androideabi-gcc \ 
    
    --cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \ 
    
    --nm=$PREBUILT/bin/arm-linux-androideabi-nm \ 
    
    --sysroot=$PLATFORM \ 
    
   # --extra-cflags=" -O3 -fpic -DANDROID -DHAVE_SYS_UIO_H=1 -Dipv6mr_interface=ipv6mr_ifindex -fasm -Wno-psabi -fno-short-enums -fno-strict-aliasing -finline-limit=300 $OPTIMIZE_CFLAGS " \ 
    
    --extra-cflags="-I$x264/include" \ 
    
    --enable-shared \ 
    
    --enable-static \ 
    
    #--extra-ldflags="-Wl,-rpath-link=$PLATFORM/usr/lib  -L$PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog" \ 
    
    --extra-ldflags="-L$x264/lib" \ 
    
   --disable-everything \ 
    
   # --enable-demuxer=mov \ 
    
   # --enable-demuxer=h264 \ 
    
   # --disable-ffplay \ 
    
    --enable-gpl \ 
    
    --enable-libx264 \ 
    
   # --enable-protocol=file \ 
    
   # --enable-avformat \ 
    
   # --enable-avcodec \ 
    
   # --enable-encoder=libx264 \ 
    
   # --enable-decoder=rawvideo \ 
    
   #--enable-decoder=mjpeg \ 
    
   # --enable-decoder=h263 \ 
    
   # --enable-decoder=mpeg4 \ 
    
   # --enable-encoder=h264 \ 
    
   # --disable-network \ 
    
    #--enable-zlib \ 
    
   # --disable-avfilter \ 
    
    #--disable-avdevice \ 
    
    $ADDITIONAL_CONFIGURE_FLAG 
    

    
make clean 
    
make  -j4 install 
    
$PREBUILT/bin/arm-linux-androideabi-ar d libavcodec/libavcodec.a inverse.o 
    
$PREBUILT/bin/arm-linux-androideabi-ld -rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib  -soname libffmpeg.so -shared -nostdlib  -z,noexecstack -Bsymbolic --whole-archive --no-undefined -o $PREFIX/libffmpeg.so libavcodec/libavcodec.a libavformat/libavformat.a libavutil/libavutil.a libswscale/libswscale.a -lc -lm -lz -ldl -llog  --warn-once  --dynamic-linker=/system/bin/linker $PREBUILT/lib/gcc/arm-linux-androideabi/4.4.3/libgcc.a 
    
} 
    

    
#arm v7vfpv3 
    
CPU=armv7-a 
    
OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=$CPU " 
    
PREFIX=./androidIncludeTrialsNDK7/$CPU 
    
ADDITIONAL_CONFIGURE_FLAG= 
    
build_one

    If I basically delete the lines extracf and extrald flags and use other ones (commented outs), it works fine except libx264 not found error. Otherwise, I get the following erros.

    ./buildnew.sh: line 35: --extra-cflags=-I/usr/local/include: No such file or directory 
    
./buildnew.sh: line 38: --extra-ldflags=-L/usr/local/lib: No such file or directory 
    
./buildnew.sh: line 40: --disable-everything: command not found 
    
./buildnew.sh: line 44: --enable-gpl: command not found

    The compilation process ends with the following.

    make: *** [libavdevice/v4l.o] Error 1 
    
make: *** Waiting for unfinished jobs.... 
    
/home/mehmet/Android_NDK_r7b/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-ar: creating libavcodec/libavcodec.a 
    
/home/mehmet/Android_NDK_r7b/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-ld: cannot open output file ./androidIncludeTrialsNDK7/armv7-a/libffmpeg.so: No such file or directory

    I have x264 installed in my directory /home/mehmet/x264 and I also check whereis x264.a, it shows me as /usr/local/lib. I have tried changing the path $x264 to point out to home/mehmet/x264 folder, but I get the same error.

    Lastly, if I enable both extracf and extrald flags ( both commented ones and the used ones) . I get the same error mentioned above. I am afraid I am doing a simple typo here, but can`t see it and it is driving me crazy. Thanks a lot for your help.

    Best.

    EDIT

    I have deleted the comments and now obtain the following.

    ./buildnew.sh: 4: ./buildnew.sh: function: not found
    
ERROR: libx264 not found

    Above error is observed from the terminal when I run the script. It build upto some point and finishes the process with the following error.

    libavcodec/libavcodec.a(libx264.o): In function `X264_frame':
    
/home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:159: undefined reference to `x264_picture_init'
    
/home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:179: undefined reference to `x264_encoder_reconfig'
    
/home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:191: undefined reference to `x264_encoder_encode'
    
/home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:197: undefined reference to `x264_encoder_delayed_frames'
    
libavcodec/libavcodec.a(libx264.o): In function `encode_nals':
    
/home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:196: undefined reference to `x264_bit_depth'
    
libavcodec/libavcodec.a(libx264.o): In function `X264_close':
    
/home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:231: undefined reference to `x264_encoder_close'
    
libavcodec/libavcodec.a(libx264.o): In function `X264_init':
    
/home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:284: undefined reference to `x264_param_default'
    
/home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:292: undefined reference to `x264_param_default_preset'
    
/home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:305: undefined reference to `x264_param_parse'
    
/home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:502: undefined reference to `x264_param_apply_fastfirstpass'
    
/home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:505: undefined reference to `x264_param_apply_profile'
    
/home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:544: undefined reference to `x264_encoder_open_125'
    
/home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:554: undefined reference to `x264_encoder_headers'
    
./buildnew.sh: 51: ./buildnew.sh: build_one: not found

  • video format with minimal decode time

    3 décembre 2022, par SunnyShah

    I am working on embedded device with 266 Mhz processor and 32 Bit bus and 480x272 screen. we want to play fullscreen video with 1024 kbps Bitrate and 24 fps. Is there any video file format which is bigger in size but fast to decode than H263 and H264.

    



    Thanks,
 Sunny.

    



    ADDED

    



    I am using processor version ARM926EJS, Arch is ArmV5, Speed is 266 Mhz with VFP and 16 bit (565 RGB) screen. I have already fastest YUV to RGB conversion available. I built video player using FFMPEG library. Speed I am getting is 17 FPS on 480x272 H263 video with 1248 KBPS. It would be great if you give me some optimized decoder reference so I can buy it.

    



    Thanks,
 Sunny.

    


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