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• How to correctly link ffmpeg to static build "g++ -static" ?

  22 juillet 2014, par user2212461

  I want to link a static build of ffmpeg when compiling a project to a static executable. I use the following command :

  g++ -O2 -static -o myBin myBin-myBin.o -lm -lpthread someotherlibraries.a 
  
  /path/to/libavformat.a /path/to/libavcodec.a

  but get the following list of errors, although I configured ffmpeg with —disable-libopus :

  libavcodec/opusdec.c:376: error: undefined reference to 'swr_is_initialized'
  
  libavcodec/opusdec.c:222: error: undefined reference to 'swr_is_initialized'
  
  libavcodec/opusdec.c:163: error: undefined reference to 'swr_init'
  
  libavcodec/opusdec.c:169: error: undefined reference to 'swr_convert'
  
  libavcodec/opusdec.c:236: error: undefined reference to 'swr_convert'
  
  libavcodec/opusdec.c:117: error: undefined reference to 'swr_convert'
  
  libavcodec/opusdec.c:408: error: undefined reference to 'swr_close'
  
  libavcodec/opusdec.c:557: error: undefined reference to 'swr_close'
  
  libavcodec/opusdec.c:579: error: undefined reference to 'swr_free'
  
  libavcodec/opusdec.c:629: error: undefined reference to 'swr_alloc'

  What am I doing wrong here ?

• Link error when compiling opencv from source when including ffmpeg compiled from source

  17 septembre 2021, par Drew

  I've been stuck on this problem for weeks.

  


  I'm trying to build opencv on a raspberry pi 4 with x264 support. To do this I need to include ffmpeg, and also build that from source.

  


  However when compiling opencv, I'm consistently getting these linker errors :

  


  /usr/bin/ld: ../../lib/libopencv_videoio.so.4.5.3: undefined reference to `avcodec_get_context_defaults3'
/usr/bin/ld: ../../lib/libopencv_videoio.so.4.5.3: undefined reference to `av_lockmgr_register'
/usr/bin/ld: ../../lib/libopencv_videoio.so.4.5.3: undefined reference to `av_register_all'


  


  I'm new to Linux, so I'm not exactly sure how to get started troubleshooting this. I believe I have ffmpeg correctly compiled and installed.

  


  Here's the steps I use :

  


  Configure ffmpeg :

  


  sudo ./configure \
--prefix=/usr \
--extra-ldflags="-latomic" \
--enable-shared \
--extra-libs='-lpthread -lm' \
--ld=g++ \
--enable-gpl \
--disable-debug \
--enable-nonfree \
--enable-libx264 \
--enable-omx \
--enable-omx-rpi \
--enable-gnutls \
--enable-libfreetype \
--enable-libmp3lame


  


  Then build it :
sudo make -j4

  


  Then install it as a package : (so opencv cmake will detect it)

  


  sudo checkinstall -y --deldoc=yes --pkgversion=9999 --pkgname=ffmpeg


  


  Then configure opencv (ffmpeg is detected)

  


  sudo cmake ../opencv_sources -D CMAKE_BUILD_TYPE=RELEASE \
-D OPENCV_EXTRA_MODULES_PATH= $PWD/../opencv_contrib/modules \
-D ENABLE_NEON=ON \
-D ENABLE_VFPV3=ON \
-D BUILD_TESTS=ON \
-D INSTALL_PYTHON_EXAMPLES=OFF \
-D OPENCV_ENABLE_NONFREE=ON \
-D CMAKE_SHARED_LINKER_FLAGS='-latomic -L/usr/lib' \
-D WITH_V4L=ON \
-D WITH_QT=OFF \
-D BUILD_EXAMPLES=OFF \
-D CPU_BASELINE=NATIVE \
-D CMAKE_INSTALL_PREFIX="$HOME/opencv_build" \
-D BUILD_opencv_apps=OFF \
-D BUILD_opencv_python2=OFF \
-D BUILD_SHARED_LIBS=ON \
-D WITH_FFMPEG=ON


  


  Then build opencv :

  


  sudo make -j4


  


  And this is where I get linking errors.

  


  I checked in /usr/lib and the .so files appear to be there :

  


  ls /usr/lib | grep libav

libavcodec.a
libavcodec.so
libavcodec.so.59
libavcodec.so.59.4.101
libavdevice.a
libavdevice.so
libavdevice.so.59
libavdevice.so.59.0.100
libavfilter.a
libavfilter.so
libavfilter.so.8
libavfilter.so.8.1.103
libavformat.a
libavformat.so
libavformat.so.59
libavformat.so.59.4.101
libavutil.a
libavutil.so
libavutil.so.57
libavutil.so.57.3.100


  


  How do check where opencv is looking when linking ? And is there a way I can check the shared libraries that ffmpeg generated to make sure they work ?

  


  The ffmpeg version is : git-2021-08-10-c245963

  


  And opencv is 4.5.3-dev

  


• Live video in facebook is lagging while using ffmpeg from video link

  1er septembre 2022, par Isteyak Ali

  Livevideo in facebook is working fine for local device video(case 1) but its having lagging issue from video link(case 2) using FFMPEG.

  


  Please find command for the same and log.

  


  Case 1 - Command : ffmpeg -re -i videoplayback.mp4 -c:v libx264 -c:a aac -f flv "rtmps ://live-api-s.facebook.com:443/rtmp/5162241770554550 ?s_bl=1&s_oil=2&s_psm=1&s_sw=0&s_tids=1&s_vt=api-s&a=Aby_ZWutqdUZR26F"

  


  Log -
2022-09-01 18:27:19.683 frame= 9 fps=0.0 q=0.0 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A dup=21 drop=0 speed= 0x
  
2022-09-01 18:27:20.163 frame= 19 fps= 19 q=0.0 q=33.0 size= 0kB time=00:00:00.44 bitrate= 8.7kbits/s dup=44 drop=0 speed=0.437x
  
2022-09-01 18:27:20.879 frame= 32 fps= 21 q=0.0 q=33.0 size= 0kB time=00:00:00.92 bitrate= 4.1kbits/s dup=74 drop=0 speed=0.616x
  
2022-09-01 18:27:21.374 frame= 47 fps= 22 q=0.0 q=33.0 size= 0kB time=00:00:01.41 bitrate= 2.7kbits/s dup=109 drop=0 speed=0.651x
  
2022-09-01 18:27:21.940 frame= 58 fps= 21 q=29.0 q=33.0 size= 40kB time=00:00:01.90 bitrate= 174.2kbits/s dup=135 drop=0 speed=0.703x
  
2022-09-01 18:27:22.530 frame= 69 fps= 21 q=29.0 q=33.0 size= 101kB time=00:00:01.92 bitrate= 429.9kbits/s dup=161 drop=0 speed=0.585x
  
2022-09-01 18:27:23.003 frame= 83 fps= 22 q=29.0 q=33.0 size= 165kB time=00:00:02.39 bitrate= 566.5kbits/s dup=193 drop=0 speed=0.623x
  
2022-09-01 18:27:23.567 frame= 97 fps= 22 q=29.0 q=33.0 size= 235kB time=00:00:02.90 bitrate= 661.9kbits/s dup=226 drop=0 speed=0.667x
  
2022-09-01 18:27:24.133 frame= 111 fps= 23 q=29.0 q=33.0 size= 315kB time=00:00:03.36 bitrate= 765.8kbits/s dup=259 drop=0 speed=0.693x
  
2022-09-01 18:27:24.715 frame= 125 fps= 23 q=29.0 q=30.0 size= 385kB time=00:00:03.85 bitrate= 817.5kbits/s dup=291 drop=0 speed=0.703x
  
2022-09-01 18:27:25.227 frame= 142 fps= 24 q=29.0 q=33.0 size= 486kB time=00:00:04.83 bitrate= 824.6kbits/s dup=331 drop=0 speed=0.802x
  
2022-09-01 18:27:25.712 frame= 158 fps= 24 q=29.0 q=33.0 size= 563kB time=00:00:05.31 bitrate= 867.6kbits/s dup=368 drop=0 speed=0.811x
  
2022-09-01 18:27:26.262 frame= 173 fps= 24 q=29.0 q=33.0 size= 634kB time=00:00:05.78 bitrate= 897.8kbits/s dup=403 drop=0 speed=0.819x
  
2022-09-01 18:27:26.796 frame= 191 fps= 25 q=29.0 q=33.0 size= 718kB time=00:00:06.24 bitrate= 941.7kbits/s dup=445 drop=0 speed=0.82x
  
2022-09-01 18:27:27.337 frame= 211 fps= 26 q=29.0 q=33.0 size= 806kB time=00:00:07.17 bitrate= 920.7kbits/s dup=492 drop=0 speed=0.882x
  
2022-09-01 18:27:27.816 frame= 233 fps= 27 q=29.0 q=33.0 size= 921kB time=00:00:07.64 bitrate= 987.4kbits/s dup=543 drop=0 speed=0.881x
  
2022-09-01 18:27:28.348 frame= 251 fps= 27 q=29.0 q=30.0 size= 1031kB time=00:00:08.42 bitrate=1001.9kbits/s dup=585 drop=0 speed=0.919x
  
2022-09-01 18:27:28.868 frame= 274 fps= 28 q=29.0 q=33.0 size= 1141kB time=00:00:09.03 bitrate=1035.2kbits/s dup=639 drop=0 speed=0.933x
  
2022-09-01 18:27:29.393 frame= 293 fps= 29 q=29.0 q=33.0 size= 1283kB time=00:00:09.49 bitrate=1106.5kbits/s dup=683 drop=0 speed=0.932x
  
2022-09-01 18:27:29.870 frame= 313 fps= 29 q=29.0 q=33.0 size= 1433kB time=00:00:10.42 bitrate=1125.6kbits/s dup=730 drop=0 speed=0.975x
  
2022-09-01 18:27:30.356 frame= 331 fps= 30 q=29.0 q=33.0 size= 1557kB time=00:00:10.89 bitrate=1170.9kbits/s dup=772 drop=0 speed=0.973x
  
2022-09-01 18:27:30.843 frame= 346 fps= 30 q=29.0 q=33.0 size= 1627kB time=00:00:11.35 bitrate=1174.1kbits/s dup=807 drop=0 speed=0.971x
  
2022-09-01 18:27:31.357 frame= 361 fps= 30 q=29.0 q=33.0 size= 1711kB time=00:00:11.81 bitrate=1186.2kbits/s dup=842 drop=0 speed=0.969x
  
2022-09-01 18:27:31.862 frame= 376 fps= 30 q=29.0 q=33.0 size= 1789kB time=00:00:12.28 bitrate=1193.3kbits/s dup=877 drop=0 speed=0.967x
  
2022-09-01 18:27:32.371 frame= 391 fps= 30 q=29.0 q=33.0 size= 1870kB time=00:00:12.74 bitrate=1201.8kbits/s dup=912 drop=0 speed=0.965x
  
2022-09-01 18:27:32.908 frame= 406 fps= 30 q=29.0 q=33.0 size= 1959kB time=00:00:13.67 bitrate=1173.3kbits/s dup=947 drop=0 speed=0.997x
  
2022-09-01 18:27:33.109 frame= 422 fps= 30 q=29.0 q=33.0 size= 2061kB time=00:00:14.14 bitrate=1193.8kbits/s dup=984 drop=0 speed=0.992x

  


  Case 2 - Command : ffmpeg -re -i "https://rr1---sn-o58g5ob-nu8e.googlevideo.com/videoplayback?expire=1662057728&ei=n6gQY-D9OLSA4-EPzJKYyA0&ip=103.11.117.194&id=o-AOgjPoKU_GiUy425eSSF6tHEIQvoHpsUyyIHnHERk6YS&itag=22&source=youtube&requiressl=yes&mh=6k&mm=31%2C29&mn=sn-o58g5ob-nu8e%2Csn-cvhelnls&ms=au%2Crdu&mv=m&mvi=1&pcm2cms=yes&pl=24&initcwndbps=867500&vprv=1&mime=video%2Fmp4&ns=z8jzAKb15xkjMcyG0dBthZQH&ratebypass=yes&dur=256.116&lmt=1649507860591021&mt=1662035606&fvip=3&fexp=24001373%2C24007246&c=WEB&rbqsm=fr&txp=4532434&n=PSC3ywazY86ChDwPP2&sparams=expire%2Cei%2Cip%2Cid%2Citag%2Csource%2Crequiressl%2Cvprv%2Cmime%2Cns%2Cratebypass%2Cdur%2Clmt&sig=AOq0QJ8wRgIhAI-aPoysSukxGNgmlsn-4bgCG84gQnILTkGJR8WQnK_bAiEArwSM0z-GYO4SinkzgdGG5qZJtoiP3ROYneg88sOjhv4%3D&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpcm2cms%2Cpl%2Cinitcwndbps&lsig=AG3C_xAwRQIhAJb7JQbSPhhH2jte8pE0G0iWf1LtRlEzQgSy-2pBGPg3AiBWX0P27KU2xwazMGLiBaQanUOeytB0jPgFsJleM8DO-w%3D%3D" -c:v libx264 -c:a aac -f flv "rtmps ://live-api-s.facebook.com:443/rtmp/5162241770554550 ?s_bl=1&s_oil=2&s_psm=1&s_sw=0&s_tids=1&s_vt=api-s&a=Aby_ZWutqdUZR26F"

  


  Log -

  


  2022-09-01 18:24:23.080 frame= 9 fps=0.0 q=0.0 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A dup=21 drop=0 speed= 0x
  
2022-09-01 18:24:23.579 frame= 23 fps= 22 q=0.0 q=33.0 size= 0kB time=00:00:00.44 bitrate= 8.7kbits/s dup=53 drop=0 speed=0.427x
  
2022-09-01 18:24:24.177 frame= 33 fps= 21 q=0.0 q=33.0 size= 0kB time=00:00:00.92 bitrate= 4.1kbits/s dup=77 drop=0 speed=0.589x
  
2022-09-01 18:24:24.872 frame= 39 fps= 18 q=0.0 q=33.0 size= 0kB time=00:00:00.99 bitrate= 3.9kbits/s dup=91 drop=0 speed=0.458x
  
2022-09-01 18:24:25.513 frame= 46 fps= 16 q=0.0 q=33.0 size= 0kB time=00:00:01.41 bitrate= 2.7kbits/s dup=107 drop=0 speed=0.497x
  
2022-09-01 18:24:26.070 frame= 52 fps= 15 q=0.0 q=33.0 size= 0kB time=00:00:01.41 bitrate= 2.7kbits/s dup=121 drop=0 speed=0.41x
  
2022-09-01 18:24:26.602 frame= 58 fps= 14 q=29.0 q=33.0 size= 40kB time=00:00:01.90 bitrate= 174.2kbits/s dup=135 drop=0 speed=0.468x
  
2022-09-01 18:24:27.341 frame= 63 fps= 14 q=29.0 q=33.0 size= 72kB time=00:00:01.90 bitrate= 311.6kbits/s dup=147 drop=0 speed=0.417x
  
2022-09-01 18:24:27.957 frame= 71 fps= 13 q=29.0 q=33.0 size= 115kB time=00:00:02.39 bitrate= 392.6kbits/s dup=165 drop=0 speed=0.448x
  
2022-09-01 18:24:28.621 frame= 78 fps= 13 q=29.0 q=33.0 size= 141kB time=00:00:02.39 bitrate= 483.2kbits/s dup=182 drop=0 speed=0.409x
  
2022-09-01 18:24:29.277 frame= 82 fps= 12 q=29.0 q=33.0 size= 154kB time=00:00:02.39 bitrate= 527.3kbits/s dup=191 drop=0 speed=0.363x
  
2022-09-01 18:24:29.851 frame= 89 fps= 12 q=29.0 q=33.0 size= 197kB time=00:00:02.87 bitrate= 560.9kbits/s dup=207 drop=0 speed=0.397x
  
2022-09-01 18:24:30.385 frame= 96 fps= 12 q=29.0 q=33.0 size= 233kB time=00:00:02.87 bitrate= 662.2kbits/s dup=224 drop=0 speed=0.371x
  
2022-09-01 18:24:31.119 frame= 100 fps= 12 q=29.0 q=33.0 size= 253kB time=00:00:03.36 bitrate= 615.5kbits/s dup=233 drop=0 speed=0.402x
  
2022-09-01 18:24:31.449 frame= 110 fps= 12 q=29.0 q=33.0 size= 309kB time=00:00:03.36 bitrate= 750.7kbits/s dup=256 drop=0 speed=0.378x
  
2022-09-01 18:24:32.062 frame= 111 fps= 12 q=29.0 q=33.0 size= 315kB time=00:00:03.83 bitrate= 672.9kbits/s dup=259 drop=0 speed=0.405x
  
2022-09-01 18:24:32.696 frame= 122 fps= 12 q=29.0 q=33.0 size= 371kB time=00:00:03.85 bitrate= 787.6kbits/s dup=284 drop=0 speed=0.383x
  
2022-09-01 18:24:33.374 frame= 130 fps= 12 q=29.0 q=33.0 size= 410kB time=00:00:04.34 bitrate= 773.0kbits/s dup=303 drop=0 speed=0.407x
  
2022-09-01 18:24:33.987 frame= 139 fps= 12 q=29.0 q=33.0 size= 475kB time=00:00:04.34 bitrate= 895.9kbits/s dup=324 drop=0 speed=0.383x
  
2022-09-01 18:24:34.445 frame= 146 fps= 12 q=29.0 q=33.0 size= 508kB time=00:00:04.83 bitrate= 861.9kbits/s dup=340 drop=0 speed=0.404x
  
2022-09-01 18:24:35.218 frame= 153 fps= 12 q=29.0 q=33.0 size= 540kB time=00:00:05.03 bitrate= 878.1kbits/s dup=357 drop=0 speed=0.405x
  
2022-09-01 18:24:35.558 frame= 163 fps= 12 q=29.0 q=33.0 size= 580kB time=00:00:05.31 bitrate= 893.8kbits/s dup=380 drop=0 speed=0.408x
  
2022-09-01 18:24:36.220 frame= 167 fps= 12 q=29.0 q=33.0 size= 609kB time=00:00:05.31 bitrate= 938.0kbits/s dup=389 drop=0 speed=0.392x
  
2022-09-01 18:24:36.821 frame= 172 fps= 12 q=29.0 q=33.0 size= 630kB time=00:00:05.78 bitrate= 892.5kbits/s dup=401 drop=0 speed=0.408x
  
2022-09-01 18:24:37.428 frame= 179 fps= 12 q=29.0 q=33.0 size= 666kB time=00:00:05.78 bitrate= 943.1kbits/s dup=417 drop=0 speed=0.394x
  
2022-09-01 18:24:37.812 frame= 185 fps= 12 q=29.0 q=30.0 size= 689kB time=00:00:06.24 bitrate= 903.2kbits/s dup=431 drop=0 speed=0.41x
  
2022-09-01 18:24:38.368 frame= 190 fps= 12 q=29.0 q=33.0 size= 711kB time=00:00:06.24 bitrate= 932.5kbits/s dup=443 drop=0 speed=0.396x
  
2022-09-01 18:24:38.979 frame= 195 fps= 12 q=29.0 q=33.0 size= 737kB time=00:00:06.52 bitrate= 925.4kbits/s dup=455 drop=0 speed=0.399x
  
2022-09-01 18:24:39.706 frame= 204 fps= 12 q=29.0 q=33.0 size= 778kB time=00:00:06.71 bitrate= 949.8kbits/s dup=476 drop=0 speed=0.398x
  
2022-09-01 18:24:40.252 frame= 212 fps= 12 q=29.0 q=33.0 size= 808kB time=00:00:07.17 bitrate= 922.8kbits/s dup=494 drop=0 speed=0.407x
  
2022-09-01 18:24:40.977 frame= 220 fps= 12 q=29.0 q=33.0 size= 841kB time=00:00:07.17 bitrate= 960.6kbits/s dup=513 drop=0 speed=0.395x
  
2022-09-01 18:24:41.926 frame= 226 fps= 12 q=29.0 q=33.0 size= 886kB time=00:00:07.64 bitrate= 949.8kbits/s dup=527 drop=0 speed=0.404x
  
2022-09-01 18:24:42.470 frame= 233 fps= 12 q=29.0 q=33.0 size= 921kB time=00:00:07.64 bitrate= 987.4kbits/s dup=543 drop=0 speed=0.385x
  
2022-09-01 18:24:43.081 frame= 237 fps= 12 q=29.0 q=33.0 size= 942kB time=00:00:07.66 bitrate=1007.5kbits/s dup=553 drop=0 speed=0.374x
  
2022-09-01 18:24:43.745 frame= 241 fps= 11 q=29.0 q=33.0 size= 971kB time=00:00:08.10 bitrate= 981.5kbits/s dup=562 drop=0 speed=0.384x
  
2022-09-01 18:24:44.270 frame= 248 fps= 11 q=29.0 q=33.0 size= 1011kB time=00:00:08.10 bitrate=1021.5kbits/s dup=578 drop=0 speed=0.373x
  
2022-09-01 18:24:45.085 frame= 251 fps= 11 q=29.0 q=30.0 size= 1031kB time=00:00:08.10 bitrate=1042.1kbits/s dup=585 drop=0 speed=0.364x

  


  As per my knowledge we have to add such type of delay or late stream video using some command.