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• Not able to change H264 profile to High from Main using FFMPEG API

  7 juin 2015, par AsG

  I am using QtFFMPEG wrapper(https://code.google.com/p/qtffmpegwrapper/) with Qt 5.4 and MSCV 2012. I want to encode a mp4 video from image files at 25 fps and high profile.
  I used the createFile() and encodeImage() functions from here

  I am using the below parameters :

  pCodecCtx=pVideoStream->codec;
  
  pCodecCtx->codec_id = pOutputFormat->video_codec;
  
  pCodecCtx->codec_type = ffmpeg::AVMEDIA_TYPE_VIDEO;
  
  pCodecCtx->profile=FF_PROFILE_H264_HIGH;
  
  pCodecCtx->bit_rate = Bitrate;
  
  pCodecCtx->width = getWidth();
  
  pCodecCtx->height = getHeight();
  
  pCodecCtx->time_base.den = fps;
  
  pCodecCtx->time_base.num = 1;
  
  pCodecCtx->gop_size = 10;
  
  pCodecCtx->pix_fmt = ffmpeg::PIX_FMT_YUV420P;
  
  pCodecCtx->qmin = 10;
  
  pCodecCtx->qmax = 51;

  The FFMPEG variables are :

  License: %s
  
   GPL version 3 or later
  
  AVCodec version %d
  
   3476480
  
  AVFormat configuration: %s
  
   --disable-static --enable-shared --enable-gpl --enable-version3 --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib

  Now I currently get a video with below properties :

  ID                             : 1
  
  Format                         : AVC
  
  Format/Info                    : Advanced Video Codec
  
  Format profile                 : Main@L3.2
  
  Format settings, CABAC         : No
  
  Format settings, ReFrames      : 1 frame
  
  Format settings, GOP           : M=1, N=10
  
  Codec ID                       : avc1
  
  Codec ID/Info                  : Advanced Video Coding
  
  Duration                       : 4s 320ms

  I want the profile to be "High" and the CABAC to be yes with 3 ReFrames. How do I achieve that ? I tried setting the profile, coder_type and max_b_frames but did not help. At times the generated file did not even play. Can anyone help please. Thanks.

  I also tried using the av_opt_set() way but could not find that function. Only function I have is av_opt_set_dict(), am I missing something - outdated FFMPEG or missing #include.

  Tried this too, didnt help-

     ffmpeg::AVDictionary *opt = NULL;
  
     int iRes = av_dict_set(&opt, "profile", "high", 0);
  
     av_opt_set_dict(pFormatCtx->priv_data, &opt);
  
     av_opt_set_dict(pFormatCtx, &opt);

  Please help.

  EDIT :
  I got a high quality mp4 by changing the qmin and qmax values and then reencoding the big sized output via command line. I will try to upgrade the FFMPEG as suggested by Ronald below. Please consider the question closed for now.

• undefined reference to 'main' in Android.mk file with NDK

  25 juillet 2015, par Laurent Gorse

  I’m trying to recompile a native ffmpeg (with rtmp) library with PIE for Android 5.0 compatibility.

  The library works fine without -pie, but when I try to recompile it with the following flags :

  LOCAL_CFLAGS += -fPIE
  
  LOCAL_LDFLAGS += -fPIE -pie

  the following error gets thrown :

  /Users/lgorse/Android_Libraries/android-ndk-r10e/platforms/android-21/arch-arm/usr/lib/crtbegin_dynamic.o:crtbrand.c:function _start: error: undefined reference to 'main'
  
  Error:error: ld returned 1 exit status
  
  make: *** [obj/local/armeabi/libffmpegbridge.so] Error 1
  
  make: Leaving directory `/Users/lgorse/Android_Libraries/ffmpegbridge/app/src/main'
  
  :app:ndkBuild FAILED
  
  Error:Execution failed for task ':app:ndkBuild'.
  
  > Process 'command '/Users/lgorse/Android_Libraries/android-ndk-r10e/ndk-build'' finished with non-zero exit value 2

  It seems that the ndk-build is trying to access a .main method from within crtbegin_dynamic. Those files are built-in with the NDK so I assume there’s nothing fundamentally wrong with them, and I’m attempting to run my configuration in the wrong way.

  Here is the Android.mk file :

  LOCAL_PATH := $(call my-dir)
  
  
  
  include $(CLEAR_VARS)
  
  
  
  LOCAL_MODULE := ffmpegbridge
  
  LOCAL_SRC_FILES := ffmpegbridge.c ffmpegbridge_context.c logdump.c
  
  LOCAL_CFLAGS := -I$(LOCAL_PATH)/include -I$(LOCAL_PATH)/../prebuilt/include
  
  LOCAL_CFLAGS += -fPIE
  
  LOCAL_LDFLAGS += -fPIE -pie
  
  LOCAL_LDLIBS += -llog
  
  LOCAL_LDLIBS += -L$(LOCAL_PATH)/../prebuilt/lib
  
  LOCAL_LDLIBS += -lcrypto -lssl -lrtmp-1 -lavcodec-56 -lavdevice-56 -lavfilter-5 -lavformat-56 -lavutil-54 -lswresample-1 -lswscale-3
  
  
  
  include $(BUILD_SHARED_LIBRARY)

  Here is my Gradle file (it contains the build instructions for ndkBuild) :

  apply plugin: 'android'
  
  
  
  android {
  
      compileSdkVersion 19
  
      buildToolsVersion "19.1.0"
  
  
  
      defaultConfig {
  
          applicationId "io.cine.ffmpegbridge"
  
          minSdkVersion 18
  
          targetSdkVersion 19
  
          versionCode 1
  
          versionName "1.0"
  
      }
  
  
  
      buildTypes {
  
          release {
  
              minifyEnabled false
  
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
  
          }
  
      }
  
      sourceSets.main {
  
          jniLibs.srcDir 'src/main/libs'
  
          jni.srcDirs = [] // disable NDK-auto-build
  
      }
  
  
  
      Properties properties = new Properties()
  
      properties.load(project.rootProject.file('local.properties').newDataInputStream())
  
  
  
      task ndkBuild(type: Exec) {
  
          def ndkDir = properties.getProperty('ndk.dir')
  
          commandLine "$ndkDir/ndk-build", '-C', file('src/main').absolutePath
  
      }
  
  
  
      task cleanNdkBuild(type: Exec) {
  
          def ndkDir = properties.getProperty('ndk.dir')
  
          commandLine "$ndkDir/ndk-build", '-C', file('src/main').absolutePath, "clean"
  
      }
  
  
  
      tasks.withType(JavaCompile) { compileTask -> compileTask.dependsOn ndkBuild }
  
      clean.dependsOn cleanNdkBuild
  
  }
  
  
  
  dependencies {
  
      compile fileTree(dir: 'libs', include: ['*.jar'])
  
  }

  I’ll be watching this question closely so feel free to ask for follow-ups. I’m definitely around !

• aacenc : do not reject AAC-Main profile

  21 août 2015, par Rostislav Pehlivanov

  aacenc : do not reject AAC-Main profile
  This commit permits for the use of the Main profile
  
  in encoding. The functionality of that profile will
  
  be added in the commits following. By itself, this
  
  commit does not alter anything.
  Signed-off-by : Rostislav Pehlivanov <atomnuker@gmail.com>
  

  • [DH] libavcodec/aacenc.c
  • [DH] libavcodec/aacenc.h