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• avcodec/h264_sei : honor the Film Grain Characteristics cancel flag

  26 juillet 2021, par James Almer

  avcodec/h264_sei : honor the Film Grain Characteristics cancel flag
  Film Grain persistence is cancelled when it's true.
  Signed-off-by : James Almer <jamrial@gmail.com>
  

  • [DH] libavcodec/h264_sei.c

• avformat/aviobuf : Honor avio_open[2] documentation

  6 janvier 2020, par Andreas Rheinhardt

  avformat/aviobuf : Honor avio_open[2] documentation
  The documentation of both avio_open() as well as avio_open2() states
  
  that on failure, the pointer to an AVIOContext given to this function
  
  (via a pointer to a pointer to an AVIOContext) will be set to NULL. Yet
  
  it didn't happen upon failure of ffurl_open_whitelist() or when allocating
  
  the internal buffer failed. This commit changes this.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavformat/aviobuf.c

• Why is the FindClass/JNI function behaving differently on nexus 5 and Honor Play ?

  17 août 2020, par Owl

  MobileFFmpeg v4.3.1LTS works on Honor Play, but doesn't work on Nexus 5. Why ?

  


  The build for Honor Play and nexus 5 is the same ->armeabi-v7a

  


  


  https://github.com/tanersener/mobile-ffmpeg/releases/tag/v4.3.1.LTS

  


  Nexus5 :enter image description here

  


  HonorPlay :enter image description here

  


  


  


  NDK = ndk-r14b

  


  


  


  JDK = jdk1.8.0_77

  


  


  I will ask the question immediately in English stackoverflow. Developing a game in Unreal Engine 4 v24.3. In the code itself there are only 2 lines that relate to MobileFFmpeg :

  


  Enabling the function :

  


  extern "C"
{
    int ffmpeg_execute(int argc, char** argv);
}


  


  Calling a function with ffmpeg parameters

  


  ffmpeg_execute(arg.size(), arg.data());


  


  Without mobile FFmpeg, the app on nexus 5 starts and works stably. When I start with FFmpeg, an error immediately appears and the app crashes :

  


  enter image description here

  


  The FindClass function does not work, the call itself is declared in mobile ffmpeg.c :

  


  /** Full name of the Config class */
const char *configClassName = "com/arthenica/mobileffmpeg/Config";


  


  ...

  


  /**
 * Called when 'mobileffmpeg' native library is loaded.
 *
 * @param vm pointer to the running virtual machine
 * @param reserved reserved
 * @return JNI version needed by 'mobileffmpeg' library
 */
jint JNI_OnLoad(JavaVM *vm, void *reserved) {
    JNIEnv *env;
    if ((*vm)->GetEnv(vm, (void**)(&env), JNI_VERSION_1_6) != JNI_OK) {
        LOGE("OnLoad failed to GetEnv for class %s.\n", configClassName);
        return JNI_FALSE;
    }

    jclass localConfigClass = (*env)->FindClass(env, configClassName);
    if (localConfigClass == NULL) {
        LOGE("OnLoad failed to FindClass %s.\n", configClassName);
        return JNI_FALSE;
    }
...


  


  I can't see what the FindClass(C++) function returns, Android Studio doesn't want to stop on the JNI_OnLoad(C++) function during debug.

  


  What are the assumptions why FindClass behavior is different on two phones ?