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• vulkan/hevc : fix 32x32 scaling list indexing

  8 juin 2023, par Dave Airlie

  vulkan/hevc : fix 32x32 scaling list indexing
  This fixes another problem in the hevc scaling lists and aligns
  
  the code with what other hwaccels do.
  

  • [DH] libavcodec/vulkan_hevc.c

• Linker command failed with exit code 1 when building ffmpeg static libraries

  19 juillet 2017, par Wilsom Sanders

  I’m trying to build ffmpeg static libraries and link them to an android project in order to implement a video player. Goal is to make a player capable of receiving video file from various sources similar to p2p file sharing networks. (target api is 21 level which is 1 level short from supposed official solution with MediaSource)

  I managed to compile ffmpeg from this repo (all the code used as-is) but later i got stuck on a linking problem. Whenever I try to compile I get list of ffmpeg methods called in my code and a short eloquent message :

  Linker command failed with exit code 1

  I have no clue how to pass -v flag to the linker in android studio. Would be great if somebody hinted me that.

  I use android studio, build with gradle and cmake.

  There’s my files :
  build.gradle (Project)

  // Top-level build file where you can add configuration options common to all sub-projects/modules.
  
  
  
  buildscript {
  
      repositories {
  
          jcenter()
  
      }
  
      dependencies {
  
          classpath 'com.android.tools.build:gradle:2.3.1'
  
  
  
          // NOTE: Do not place your application dependencies here; they belong
  
          // in the individual module build.gradle files
  
      }
  
  }
  
  
  
  allprojects {
  
      repositories {
  
          jcenter()
  
      }
  
  }
  
  
  
  task clean(type: Delete) {
  
      delete rootProject.buildDir
  
  }

  build.gradle (Module)

  apply plugin: 'com.android.application'
  
  
  
      android {
  
          compileSdkVersion 25
  
          buildToolsVersion "25.0.3"
  
          productFlavors {
  
              x86 {
  
                  ndk {
  
                      abiFilter "x86"
  
                  }
  
              }
  
              arm {
  
                  ndk {
  
                      abiFilters "armeabi-v7a"
  
                  }
  
              }
  
              armv7 {
  
                  ndk {
  
                      abiFilters "armeabi-v7a"
  
                  }
  
              }
  
          }
  
          defaultConfig {
  
              applicationId "com.example.ledo.ndkapplication"
  
              minSdkVersion 22
  
              targetSdkVersion 25
  
              versionCode 1
  
              versionName "1.0"
  
              testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
  
              externalNativeBuild {
  
                  cmake {
  
                      cppFlags "-std=c++11 -frtti -fexceptions"
  
                      arguments '-DANDROID_PLATFORM=android-16'
  
                  }
  
              }
  
          }
  
          buildTypes {
  
              release {
  
                  minifyEnabled false
  
                  proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
  
              }
  
          }
  
          externalNativeBuild {
  
              cmake {
  
                  path "CMakeLists.txt"
  
              }
  
          }
  
          splits {
  
              abi {
  
                  enable true
  
                  reset()
  
                  include 'x86', 'armeabi-v7a'
  
                  universalApk true
  
              }
  
          }
  
      }
  
  
  
      dependencies {
  
          compile fileTree(dir: 'libs', include: ['*.jar'])
  
          androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
  
              exclude group: 'com.android.support', module: 'support-annotations'
  
          })
  
          compile 'com.android.support:appcompat-v7:25.3.1'
  
          compile 'com.android.support.constraint:constraint-layout:1.0.2'
  
          compile 'com.android.support:design:25.3.1'
  
          compile 'com.writingminds:FFmpegAndroid:0.3.2'
  
          testCompile 'junit:junit:4.12'
  
      }

  CMakeLists.txt

  # For more information about using CMake with Android Studio, read the
  
  # documentation: https://d.android.com/studio/projects/add-native-code.html
  
  
  
  # Sets the minimum version of CMake required to build the native library.
  
  
  
  cmake_minimum_required(VERSION 2.8)
  
  
  
  # Creates and names a library, sets it as either STATIC
  
  # or SHARED, and provides the relative paths to its source code.
  
  # You can define multiple libraries, and CMake builds them for you.
  
  # Gradle automatically packages shared libraries with your APK.
  
  
  
  add_library( # Sets the name of the library.
  
               native-lib
  
  
  
               # Sets the library as a shared library.
  
               SHARED
  
  
  
               # Provides a relative path to your source file(s).
  
               src/main/cpp/native-lib.cpp
  
               src/main/cpp/NativePlayer.h
  
               src/main/cpp/NativePlayer.cpp)
  
  
  
  # Searches for a specified prebuilt library and stores the path as a
  
  # variable. Because CMake includes system libraries in the search path by
  
  # default, you only need to specify the name of the public NDK library
  
  # you want to add. CMake verifies that the library exists before
  
  # completing its build.
  
  
  
  find_library( # Sets the name of the path variable.
  
                log-lib
  
  
  
                # Specifies the name of the NDK library that
  
                # you want CMake to locate.
  
                log )
  
  find_library(png-lib png)
  
  
  
  # Specifies libraries CMake should link to your target library. You
  
  # can link multiple libraries, such as libraries you define in this
  
  # build script, prebuilt third-party libraries, or system libraries.
  
  
  
  #avcodec
  
  #avfilter
  
  #avformat
  
  #avutil
  
  #swresample
  
  #swscale
  
  
  
  #${ANDROID_ABI}
  
  
  
  message(${ANDROID_ABI})
  
  set(FFMPEG_ROOT_DIR src/main/libs/ffmpeg/${ANDROID_ABI})
  
  
  
  add_library(avcodec STATIC IMPORTED)
  
  add_library(avformat STATIC IMPORTED)
  
  add_library(avfilter STATIC IMPORTED)
  
  add_library(avutil STATIC IMPORTED)
  
  add_library(swresample STATIC IMPORTED)
  
  add_library(swscale STATIC IMPORTED)
  
  
  
  #SET_TARGET_PROPERTIES(avcodec PROPERTIES LINKER_LANGUAGE C)
  
  set_target_properties(avcodec PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libavcodec.a)
  
  #SET_TARGET_PROPERTIES(avfilter PROPERTIES LINKER_LANGUAGE C)
  
  set_target_properties(avfilter PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libavfilter.a)
  
  #SET_TARGET_PROPERTIES(avformat PROPERTIES LINKER_LANGUAGE C)
  
  set_target_properties(avformat PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libavformat.a)
  
  #SET_TARGET_PROPERTIES(avutil PROPERTIES LINKER_LANGUAGE C)
  
  set_target_properties(avutil PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libavutil.a)
  
  #SET_TARGET_PROPERTIES(swresample PROPERTIES LINKER_LANGUAGE C)
  
  set_target_properties(swresample PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libswresample.a)
  
  #SET_TARGET_PROPERTIES(swscale PROPERTIES LINKER_LANGUAGE C)
  
  set_target_properties(swscale PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libswscale.a)
  
  
  
  include_directories( ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/include )
  
  include_directories( ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib )
  
  target_link_libraries( # Specifies the target library.
  
                         native-lib
  
  
  
                         # Links the target library to the log library
  
                         # included in the NDK.
  
                         ${log-lib}
  
                         avcodec
  
                         avformat
  
                         #avfilter
  
                         #swresample
  
                         #swscale
  
                         #avutil
  
                         GLESv2)

  I have .a files in following locations :

  • %PROJECT_DIR%/app/src/libs/ffmpeg/armeabi-v7a
  • %PROJECT_DIR%/app/src/libs/ffmpeg/armeabi-v7a-neon
  • %PROJECT_DIR%/app/src/libs/ffmpeg/x86

  It doesn’t look to me that linker misses files themselves. (I get different out put if I misplace them.)

• How to create a live stream in dash format from mp4 file or m3u8 list ? (ffmpeg)

  30 juin 2017, par jorge.luengo

  I have been trying different ways of running dash live streams from mp4 or m3u8 but none of them worked fined. I want to use ffmpeg because of my server conditions.
  This command has been the one that did something but it didn’t work as I expected :

  ffmpeg-3.3.2-64bit-static/ffmpeg -i reencoded24eng.mp4 -vf yadif=0 -r 30 -vcodec libx264 -keyint_min 60 -g 60 -b:v 1000k -ac 2 -strict 2 -acodec aac -ab 64k -map 0:v -map 0:a -f dash -min_seg_duration 2000  -use_template 1 -use_timeline 1 -init_seg_name init-\$RepresentationID\$.mp4 -dash 1  -media_seg_name test-\$RepresentationID\$-\$Number\$.mp4 test.mpd

  The error that the dash-if conformance tool provides is the following one :

  Start XLink resolving

  XLink resolving successful

  Start MPD validation

  MPD validation successful - DASH is valid !

  Start Schematron validation

  location="/[local-name()=’MPD’ and namespace-uri()=’urn:mpeg:dash:schema:mpd:2011’]/[local-name()=’Period’ and >namespace-uri()=’urn:mpeg:dash:schema:mpd:2011’]">
  If the MPD is dynamic the Period element shall have an id.

  location="/[local-name()=’MPD’ and namespace-uri()=’urn:mpeg:dash:schema:mpd:2011’]/[local-name()=’Period’ and >namespace-uri()=’urn:mpeg:dash:schema:mpd:2011’]/*local[1]">
  Common attributes for AdaptationSet and Representation shall either be in >one of the elements but not in both.

  Schematron validation not successful - DASH is not valid !

  BUILD SUCCESSFUL
  Total time : 5 seconds

  Could anyone help me with this ?