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• Linking against libx264 does not work (Cygwin)

  11 novembre 2011, par Erik

  I want to use libx264 in one of my projects on windows. I compiled x264 with cygwin including the shared and static library. Everythin works out fine, also the static and dynamic libraries are properly installed in cygwin.

  When trying to compile another project that uses libx264 (gcc ... -lx264) I get an error :

  /cygdrive/c/Users/Erik/workspace/test/Debug/../main.cpp:406: undefined reference to `x264_param_default_preset(x264_param_t*, char const*, char const*)'
  
  /cygdrive/c/Users/Erik/workspace/test/Debug/../main.cpp:425: undefined reference to `x264_param_apply_profile(x264_param_t*, char const*)'

  The linker seems to have problem with my built libraries of libx264, but what is exactly wrong here ? How can I correctly link x264 ?

  The full build output looks like this :

  Build of configuration Debug for project test **

  make all 
  
  Building target: test.exe
  
  Invoking: Cygwin C++ Linker
  
  g++ -L"/cygdrive/c/Program Files (x86)/Microsoft SDKs/Windows/v7.0A/Lib" -L"/cygdrive/c/Program Files (x86)/Microsoft DirectX SDK (June 2010)/Lib/x86" -L/usr/local/lib -o "test.exe"  ./main.o   -lx264.dll -lKernel32 -lUser32 -lgdi32 -lwinspool -lcomdlg32 -ladvapi32 -lshell32 -lole32 -ld3dx9d -ld3d9 -loleaut32 -luuid -lm
  
  ./main.o: In function `_Z8InitX264ii':
  
  /cygdrive/c/Users/Erik/workspace/test/Debug/../main.cpp:406: undefined reference to `x264_param_default_preset(x264_param_t*, char const*, char const*)'
  
  /cygdrive/c/Users/Erik/workspace/test/Debug/../main.cpp:425: undefined reference to `x264_param_apply_profile(x264_param_t*, char const*)'
  
  collect2: ld returned 1 exit status
  
  make: *** [test.exe] Error 1
  
  
  
  **** Build Finished ****

  Thanks for your help !

• How can I use ffmpeg to convert all HEVC videos to h.264 videos only on linux ? [closed]

  13 juillet 2022, par Jayden Lo

  I am trying to import all my images and videos from Google Photos to Nextcloud. I used Google Takeout to download them, but some videos are in HEVC format, which is not supported by most devices. How can I batch convert all HEVC videos to h.264 ? I am using Ubuntu and here is my file structure :

  


  ./Photos/
  Image1.jpg
  Image2.jpg
  ...
  HEVC-Video1.mp4
  HEVC-Video2.mp4
  HEVC-Video3.mp4
  ...
  H.264-Video1.mp4
  H.264-Video2.mp4
  ...


  


  Thanks in advance.

  


• No Implementation Found for init method in Youtube Live Streaming Watch me project

  17 mai 2017, par Basha

  I am new to android development.presently I am Working on Youtube Live Streaming and downloaded watchMe project.I am getting the error in my class where I used to load FFMPEG libffmpeg.so file and the error was cannot resolve "init" method. and getting error while running the application as below

  java.lang.UnsatisfiedLinkError: No implementation found for boolean com.google.sai.apps.watchme.Ffmpeg.init(int, int, int, java.lang.String) (tried Java_com_google_sai_apps_watchme_Ffmpeg_init and Java_com_google_sai_apps_watchme_Ffmpeg_init__IIILjava_lang_String_2)
  
                                                                                       at com.google.sai.apps.watchme.Ffmpeg.init(Native Method)
  
                                                                                       at com.google.sai.apps.watchme.VideoStreamingConnection.open(VideoStreamingConnection.java:71)
  
                                                                                       at com.google.sai.apps.watchme.StreamerService.startStreaming(StreamerService.java:73)
  
                                                                                       at com.google.sai.apps.watchme.StreamerActivity.startStreaming(StreamerActivity.java:163)
  
                                                                                       at com.google.sai.apps.watchme.StreamerActivity.access$200(StreamerActivity.java:39)
  
                                                                                       at com.google.sai.apps.watchme.StreamerActivity$1.onServiceConnected(StreamerActivity.java:55)
  
                                                                                       at android.app.LoadedApk$ServiceDispatcher.doConnected(LoadedApk.java:1223)
  
                                                                                       at android.app.LoadedApk$ServiceDispatcher$RunConnection.run(LoadedApk.java:1240)
  
                                                                                       at android.os.Handler.handleCallback(Handler.java:739)
  
                                                                                       at android.os.Handler.dispatchMessage(Handler.java:95)
  
                                                                                       at android.os.Looper.loop(Looper.java:148)
  
                                                                                       at android.app.ActivityThread.main(ActivityThread.java:5438)
  
                                                                                       at java.lang.reflect.Method.invoke(Native Method)
  
                                                                                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:762)
  
                                                                                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:652)
  
      05-17 11:31:41.415 23434-25678/com.google.sai.apps.watchme E/ImageFetcher: Error in downloadBitmap - java.io.FileNotFoundException: https://i.ytimg.com/vi/FFvfpXcOpYk/default_live.jpg

  and FFMPEG class was

  public class Ffmpeg {
  
  
  
  
  
      static {
  
          System.loadLibrary("ffmpeg");
  
      }
  
  
  
  
  
      public static native boolean init(int width, int height, int audio_sample_rate, String rtmpUrl);
  
  
  
      public static native void shutdown();
  
  
  
      // Returns the size of the encoded frame.
  
      public static native int encodeVideoFrame(byte[] yuv_image);
  
  
  
      public static native int encodeAudioFrame(short[] audio_data, int length);
  
  }

  please someone help me.