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• Bash Shell Script Remote Background Processing

  22 mai 2015, par user281738

  I Have Created a Bash Shell script.. With that i can crop and convert video locally..

  nohup ffmpeg -i "$c1" -vf "$crop_value1" -b 1800k "/home/Cropped/""$name1"_cropped.mp4"" > crop1.txt &
  
  PID1=$!
  
  nohup ffmpeg -i "$c2" -vf "$crop_value2" -b 1800k "/home/Cropped/""$name2"_cropped.mp4"" > crop2.txt &
  
  PID2=$!
  
  nohup ffmpeg -i "$c3" -vf "$crop_value3" -b 1800k "/home/Cropped/""$name3"_cropped.mp4"" > crop3.txt &
  
  PID3=$!
  
  nohup ffmpeg -i "$c4" -vf "$crop_value4" -b 1800k "/home/Cropped/""$name4"_cropped.mp4"" > crop4.txt &
  
  PID4=$!
  
  wait $PID1
  
  wait $PID2
  
  wait $PID3
  
  wait $PID4

  As Above Code Shows Im Using 4 Conversion In background In Local Server And I’m Using Wait PID To Check Whether Conversation Finished Or Not.

  My Problem Is Its taking very late to Convert.. So I Thinking Of Converting One Conversion In Local Sever And Another Three In Different Remote Server Through SSH
  Example :

  ssh user@192.168.1.1 "nohup ffmpeg -i "$c1" -vf "$crop_value1" -b 1800k "/home/Cropped/""$name1"_cropped.mp4"" > crop1.txt &"

  My Problem Is After Executing Remote Commands How Can I Get Remote PID And Use PID Wait Option For All Remote Connection.

• Error in building opencv with ffmpeg

  15 avril 2020, par batuman

  I installed ffmpeg according to this article. ffmpeg installation was ok.
Now I build opencv with ffmpeg support and I have some errors.
The errors are

  



  /home/coie/Softwares/Libraries/opencv-2.4.13.3/modules/highgui/src/cap_ffmpeg_impl.hpp:1484:21: error: ‘CODEC_FLAG_GLOBAL_HEADER’ was not declared in this scope
         c->flags |= CODEC_FLAG_GLOBAL_HEADER;
                     ^
/home/coie/Softwares/Libraries/opencv-2.4.13.3/modules/highgui/src/cap_ffmpeg_impl.hpp: In function ‘int icv_av_write_frame_FFMPEG(AVFormatContext*, AVStream*, uint8_t*, uint32_t, AVFrame*)’:
/home/coie/Softwares/Libraries/opencv-2.4.13.3/modules/highgui/src/cap_ffmpeg_impl.hpp:1512:30: error: ‘AVFMT_RAWPICTURE’ was not declared in this scope
     if (oc->oformat->flags & AVFMT_RAWPICTURE) {
                              ^
/home/coie/Softwares/Libraries/opencv-2.4.13.3/modules/highgui/src/cap_ffmpeg_impl.hpp: In member function ‘void CvVideoWriter_FFMPEG::close()’:
/home/coie/Softwares/Libraries/opencv-2.4.13.3/modules/highgui/src/cap_ffmpeg_impl.hpp:1686:35: error: ‘AVFMT_RAWPICTURE’ was not declared in this scope
         if( (oc->oformat->flags & AVFMT_RAWPICTURE) == 0 )
                                   ^
/home/coie/Softwares/Libraries/opencv-2.4.13.3/modules/highgui/src/cap_ffmpeg_impl.hpp: In member function ‘bool CvVideoWriter_FFMPEG::open(const char*, int, double, int, int, bool)’:
/home/coie/Softwares/Libraries/opencv-2.4.13.3/modules/highgui/src/cap_ffmpeg_impl.hpp:1920:32: error: ‘AVFMT_RAWPICTURE’ was not declared in this scope
     if (!(oc->oformat->flags & AVFMT_RAWPICTURE)) {
                                ^
In file included from /home/coie/Softwares/Libraries/opencv-2.4.13.3/modules/highgui/src/cap_ffmpeg.cpp:45:0:
/home/coie/Softwares/Libraries/opencv-2.4.13.3/modules/highgui/src/cap_ffmpeg_impl.hpp: In static member function ‘static AVStream* OutputMediaStream_FFMPEG::addVideoStream(AVFormatContext*, AVCodecID, int, int, int, double, AVPixelFormat)’:
/home/coie/Softwares/Libraries/opencv-2.4.13.3/modules/highgui/src/cap_ffmpeg_impl.hpp:2214:25: error: ‘CODEC_FLAG_GLOBAL_HEADER’ was not declared in this scope
             c->flags |= CODEC_FLAG_GLOBAL_HEADER;
                         ^
modules/highgui/CMakeFiles/opencv_highgui.dir/build.make:230: recipe for target 'modules/highgui/CMakeFiles/opencv_highgui.dir/src/cap_ffmpeg.cpp.o' failed
make[2]: *** [modules/highgui/CMakeFiles/opencv_highgui.dir/src/cap_ffmpeg.cpp.o] Error 1
CMakeFiles/Makefile2:2349: recipe for target 'modules/highgui/CMakeFiles/opencv_highgui.dir/all' failed


  



  What could be wrong ?

  


• Execution failed for task ':extension-ffmpeg:externalNativeBuildRelease'

  21 septembre 2021, par Feroz Khan

  I'm trying to build ExoPlayer with ffmpeg extension upon running the ./gradlew extension-ffmpeg:assembleRelease command, getting the following error.

  


  Build command failed.
Error while executing process /root/Android/Sdk/cmake/3.18.1/bin/ninja with arguments {-C 
/home/ferozkhandev/ExoPlayer/extensions/ffmpeg/.cxx/cmake/release/armeabi-v7a ffmpegJNI}
  ninja: Entering directory 
`/home/ferozkhandev/ExoPlayer/extensions/ffmpeg/.cxx/cmake/release/armeabi-v7a'
 
ninja: error: '/home/ferozkhandev/ExoPlayer/extensions/ffmpeg/src/main/jni/ffmpeg/android- 
libs/armeabi-v7a/libswresample.a', needed by 
'/home/ferozkhandev/ExoPlayer/extensions/ffmpeg/buildout/intermediates/cmake/release/obj/armeabi- 
v7a/libffmpegJNI.so', missing and no known rule to make it