Recherche avancée

Sur d’autres sites (7023)

• How to compile FFmpeg with libx265 for Android ?

  20 mars 2018, par user3032481

  I have compiled FFmpeg with libx264(as static library) for Android successfully. But I want to use libx265(as static library) in FFmpeg on Android, too. So I have made some attempts :

  First, I fixed libx265’s log2 function and posix_memalign function not found problems by changing them into log(use log to approximate log2) function and memalign(to replace posix_memalign and do some adjustments) function. And fixed the pthread-linking problem by removing "-lpthread" in the cmakelist.txt file.

  Then, I used cmake and make to compile libx265(as static library) successfully.

  I enabled libx265 while FFmpeg configure. But when the configure ran, it showed "libx265 not found using pkg-config" on the screen.

  I checked the config.log, and found these error message :

  /home/user/ffmpeg-2.8.1/android/arm/lib/libx265.a(bitstream.cpp.o):bitstream.cpp:typeinfo for x265::BitInterface: error: undefined reference to 'vtable for __cxxabiv1::__class_type_info'
  
  /home/user/ffmpeg-2.8.1/android/arm/bin/../lib/gcc/arm-linux-androideabi/4.9/../../../../arm-linux-androideabi/bin/ld: the vtable symbol may be undefined because the class is missing its key function
  
  /home/user/ffmpeg-2.8.1/android/arm/lib/libx265.a(bitstream.cpp.o):bitstream.cpp:typeinfo for x265::Bitstream: error: undefined reference to 'vtable for __cxxabiv1::__si_class_type_info'
  
  /home/user/ffmpeg-2.8.1/android/arm/bin/../lib/gcc/arm-linux-androideabi/4.9/../../../../arm-linux-androideabi/bin/ld: the vtable symbol may be undefined because the class is missing its key function
  
  /home/user/ffmpeg-2.8.1/android/arm/lib/libx265.a(encoder.cpp.o):encoder.cpp:typeinfo for x265::SEIDecodedPictureHash: error: undefined reference to 'vtable for __cxxabiv1::__si_class_type_info'
  
  /home/user/ffmpeg-2.8.1/android/arm/bin/../lib/gcc/arm-linux-androideabi/4.9/../../../../arm-linux-androideabi/bin/ld: the vtable symbol may be undefined because the class is missing its key function
  
  /home/user/ffmpeg-2.8.1/android/arm/lib/libx265.a(encoder.cpp.o):encoder.cpp:typeinfo for x265::SEIuserDataUnregistered: error: undefined reference to 'vtable for __cxxabiv1::__si_class_type_info'
  
  /home/user/ffmpeg-2.8.1/android/arm/bin/../lib/gcc/arm-linux-androideabi/4.9/../../../../arm-linux-androideabi/bin/ld: the vtable symbol may be undefined because the class is missing its key function
  
  /home/user/ffmpeg-2.8.1/android/arm/lib/libx265.a(encoder.cpp.o):encoder.cpp:typeinfo for x265::SEIMasteringDisplayColorVolume: error: undefined reference to 'vtable for __cxxabiv1::__si_class_type_info'
  
  /home/user/ffmpeg-2.8.1/android/arm/bin/../lib/gcc/arm-linux-androideabi/4.9/../../../../arm-linux-androideabi/bin/ld: the vtable symbol may be undefined because the class is missing its key function
  
  /home/user/ffmpeg-2.8.1/android/arm/lib/libx265.a(threading.cpp.o):threading.cpp:typeinfo for x265::Thread: error: undefined reference to 'vtable for __cxxabiv1::__class_type_info'
  
  /home/user/ffmpeg-2.8.1/android/arm/bin/../lib/gcc/arm-linux-androideabi/4.9/../../../../arm-linux-androideabi/bin/ld: the vtable symbol may be undefined because the class is missing its key function
  
  /home/user/ffmpeg-2.8.1/android/arm/lib/libx265.a(wavefront.cpp.o):wavefront.cpp:typeinfo for x265::JobProvider: error: undefined reference to 'vtable for __cxxabiv1::__class_type_info'
  
  /home/user/ffmpeg-2.8.1/android/arm/bin/../lib/gcc/arm-linux-androideabi/4.9/../../../../arm-linux-androideabi/bin/ld: the vtable symbol may be undefined because the class is missing its key function
  
  /home/user/ffmpeg-2.8.1/android/arm/lib/libx265.a(slicetype.cpp.o):slicetype.cpp:typeinfo for x265::BondedTaskGroup: error: undefined reference to 'vtable for __cxxabiv1::__class_type_info'
  
  /home/user/ffmpeg-2.8.1/android/arm/bin/../lib/gcc/arm-linux-androideabi/4.9/../../../../arm-linux-androideabi/bin/ld: the vtable symbol may be undefined because the class is missing its key function
  
  /home/user/ffmpeg-2.8.1/android/arm/lib/libx265.a(frameencoder.cpp.o):frameencoder.cpp:function x265::FrameEncoder::encodeSlice(): error: undefined reference to '__dynamic_cast'
  
  /home/user/ffmpeg-2.8.1/android/arm/lib/libx265.a(frameencoder.cpp.o):frameencoder.cpp:function x265::FrameEncoder::encodeSlice(): error: undefined reference to '__dynamic_cast'
  
  /home/user/ffmpeg-2.8.1/android/arm/lib/libx265.a(frameencoder.cpp.o):frameencoder.cpp:function x265::FrameEncoder::processRowEncoder(int, x265::ThreadLocalData&): error: undefined reference to '__dynamic_cast'
  
  /home/user/ffmpeg-2.8.1/android/arm/lib/libx265.a(frameencoder.cpp.o):frameencoder.cpp:function .LTHUNK2: error: undefined reference to '__dynamic_cast'
  
  /home/user/ffmpeg-2.8.1/android/arm/lib/libx265.a(frameencoder.cpp.o):frameencoder.cpp:typeinfo for x265::FrameEncoder: error: undefined reference to 'vtable for __cxxabiv1::__vmi_class_type_info'
  
  /home/user/ffmpeg-2.8.1/android/arm/bin/../lib/gcc/arm-linux-androideabi/4.9/../../../../arm-linux-androideabi/bin/ld: the vtable symbol may be undefined because the class is missing its key function
  
  /home/user/ffmpeg-2.8.1/android/arm/lib/libx265.a(sei.cpp.o):sei.cpp:typeinfo for x265::SEI: error: undefined reference to 'vtable for __cxxabiv1::__vmi_class_type_info'
  
  /home/user/ffmpeg-2.8.1/android/arm/bin/../lib/gcc/arm-linux-androideabi/4.9/../../../../arm-linux-androideabi/bin/ld: the vtable symbol may be undefined because the class is missing its key function

  How should I do to fix it ?

• Bash script doesn't read entire line

  4 octobre 2019, par Miguel Alatorre

  First off, I am in the early stages of learning bash shell scripting, so I apologize if I say / do anything that doesn’t make sense.

  Currently, I’m trying to have an SBC, a Khadas VIM3 specifically, run a python script to find and label faces in any given video from a local server. Currently, I need to reduce the frame rate and resolution of the video, which is where the bash script comes into play. I need to automate this process and thought I’d do it using a bash script and crontab.
  The file paths are found and output into a file from a separate script, and are read by the bash script. The problem comes when I try and call ffmpeg to use the file paths.

  The Code :

  pathFile="/home/khadas/Documents/paths"
  
  
  
  while IFS= read -r line
  
  do
  
          ffmpeg -i "$line" -vf scale=960:540 -y "$line"
  
          cp "$line" ./
  
  done < $pathFile

  The resulting error :

  : No such file or directoryalRecognition/10/14-53.h264+/20-509-26-10-14-53.mp4
  
  cp: cannot stat '/home/khadas/Downloads/FacialRecognition/10/14-53.h264+/20-509-26-10-14-53.mp4'$'\r': No such file or directory

  Example of the paths file (There will be hundreds of entries) :

  /home/khadas/Downloads/FacialRecognition/10/14-42.h264+/20-509-26-10-14-42.mp4
  
  /home/khadas/Downloads/FacialRecognition/10/59-06.h264+/20-509-26-10-59-06.mp4
  
  /home/khadas/Downloads/FacialRecognition/10/36-28.h264+/20-509-26-10-36-28.mp4
  
  /home/khadas/Downloads/FacialRecognition/10/14-53.h264+/20-509-26-10-14-53.mp4

  When using a trimmed down version, the script works as expected. Could it be an issue with the length of the lines ? Any help is much appreciated.

• Java execute command doesn't work in code

  27 août 2017, par Ariana

  I am calling java.lang.Runtime.exec(...) in my Java program to run a command (some FFMPEG commands) simply passed to my function :

      private static void RunCommand(String command) throws InterruptedException {
  
          try {
  
              // Execute command
  
              Process proc = Runtime.getRuntime().exec(command);
  
  }
  
  }

  It runs OK for simple FFMPEG cases such as ffmpeg -i input.avi -c copy output.avi.

  But for one of the commands, apparently it doesn’t run. When I copy/paste the exact String in command line, I am able to run it and see the output file.

  ffmpeg -i "concat:/home/temp10.avi|/home/p2.avi|/home/temp15.avi" -c copy -y /home/output.avi

  Which is the following in code :

  String c4="ffmpeg -i \"concat:"+dir+temp1+"|"+dir+ad+"|"+dir+temp3+"\" -c copy -y "+dir+output;

  What is going on ? Any guesses why it doesn’t run in code ? If the " is causing the problem, why the corresponding string looks good ?!