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• Cant link against ffmpeg with openssl using cmake

  24 mars 2017, par David Barishev

  I have build ffmpeg libraries statically for x86 android using a custom configuration.Now i wanted to add them in my android project.

  Im using ffmpeg 3.2.git, android studio 2.3.

  I created a folder named distribution which had my binaries, and the minimum headers i needed for it to not tell me about missing header (Except for the avutil- i just included them all), located the root of my project.
  I edited my cmake to include the libraries :

  add_library(
  
           native-lib
  
           SHARED
  
           src/main/cpp/native-lib.cpp )
  
  
  
  set(distribution_DIR ${CMAKE_SOURCE_DIR}/../distribution)
  
  
  
  add_library(lib_avcodec STATIC IMPORTED)
  
  set_target_properties(lib_avcodec PROPERTIES IMPORTED_LOCATION
  
      ${distribution_DIR}/libavcodec/lib/${ANDROID_ABI}/libavcodec.a)
  
  
  
  add_library(lib_avfilter STATIC IMPORTED)
  
  set_target_properties(lib_avfilter PROPERTIES IMPORTED_LOCATION
  
      ${distribution_DIR}/libavfilter/lib/${ANDROID_ABI}/libavfilter.a)
  
  
  
  add_library(lib_avformat STATIC IMPORTED)
  
  set_target_properties(lib_avformat PROPERTIES IMPORTED_LOCATION
  
      ${distribution_DIR}/libavformat/lib/${ANDROID_ABI}/libavformat.a)
  
  
  
  add_library(lib_avutil STATIC IMPORTED)
  
  set_target_properties(lib_avutil PROPERTIES IMPORTED_LOCATION
  
      ${distribution_DIR}/libavutil/lib/${ANDROID_ABI}/libavutil.a)
  
  
  
  add_library(lib_swresample STATIC IMPORTED)
  
  set_target_properties(lib_swresample PROPERTIES IMPORTED_LOCATION
  
      ${distribution_DIR}/libswresample/lib/${ANDROID_ABI}/libswresample.a)
  
  
  
  
  
  include_directories(
  
                            ${distribution_DIR}
  
                            )
  
  
  
  find_library( # Sets the name of the path variable.
  
            z-lib
  
  
  
            # Specifies the name of the NDK library that
  
            # you want CMake to locate.
  
            z )
  
  
  
  target_link_libraries( 
  
                     native-lib
  
  
  
                     ${z-lib}
  
  
  
                     lib_crypto
  
                     lib_ssl
  
  
  
                     lib_avfilter
  
                     lib_avformat
  
                     lib_avcodec
  
                     lib_swresample
  
  
  
                     lib_avutil
  
  
  
                      )

  I also restricted the build to only x86, in my app build.gradle :

  ndk {
  
              // Specifies the ABI configurations of your native
  
              // libraries Gradle should build and package with your APK.
  
              abiFilters 'x86'
  
      }

  The project gradle sync worked successfully.
  I wrote the following code in my cpp file :

  #include 
  
  
  
  
  
  extern "C"{
  
      #include "libavformat/avformat.h"
  
  }
  
  JNIEXPORT void JNICALL
  
  Java_com_example_david_testffmpegcpp_MainActivity_stringFromJNI(
  
          JNIEnv *env,
  
          jobject /* this */) {
  
  
  
      av_register_all ();
  
      avformat_network_init ();
  
  
  
  
  
  }

  Just to check if the library works, but i cant seem to link against the libraries correctly. It complains about undefined symbols.
  What did i do wrong ?

  EDIT :

  I changed the order of the linked libraries, and was able to remove all error for ffmpeg’s library functions not found, and i added zlib,that removed some more.

  The only error left are those how are related to openssl, its logical since i compiled my ffmpeg libraries with openssl.

  I tried linking my openssl static libraries that i used for compiling ffmpeg like this :

  set(ssl_dir ${CMAKE_SOURCE_DIR}/../../../FFmpegBuild/Openssl/output_19/android)
  
  
  
  add_library(lib_ssl STATIC IMPORTED)
  
  set_target_properties(lib_ssl PROPERTIES IMPORTED_LOCATION
  
      ${ssl_dir}/openssl-${ANDROID_ABI}/lib/libssl.a)
  
  
  
  add_library(lib_crypto STATIC IMPORTED)
  
  set_target_properties(lib_crypto PROPERTIES IMPORTED_LOCATION
  
      ${ssl_dir}/openssl-${ANDROID_ABI}/lib/libcrypto.a) 
  
  
  
  include_directories(      ${ssl_dir}/openssl-${ANDROID_ABI}/include
  
                            ${distribution_DIR}
  
  
  
                            )

  And linked against them :

  target_link_libraries( # Specifies the target library.
  
                         native-lib
  
  
  
                         ${z-lib}
  
  
  
  
  
                         lib_ssl
  
                         lib_crypto
  
  
  
                         lib_avfilter
  
                         lib_avformat
  
                         lib_avcodec
  
                         lib_swresample
  
  
  
                         lib_avutil
  
  
  
                          )

  But i’m still getting the error that i state below.
  My question is why ? Also if i already built ffmpeg in static mode, how come i need to relink openssl again ?

  Error :

  Error while executing process D:\AndroidSDK\cmake\3.6.3155560\bin\cmake.exe with arguments {--build D:\AndroidApps\TestFFmpegCpp\app\.externalNativeBuild\cmake\debug\x86 --target native-lib}
  
  [1/1] Linking CXX shared library ..\..\..\..\build\intermediates\cmake\debug\obj\x86\libnative-lib.so
  
  FAILED: cmd.exe /C "cd . && D:\AndroidSDK\ndk-bundle\toolchains\llvm\prebuilt\windows-x86_64\bin\clang++.exe  --target=i686-none-linux-android --gcc-toolchain=D:/AndroidSDK/ndk-bundle/toolchains/x86-4.9/prebuilt/windows-x86_64 --sysroot=D:/AndroidSDK/ndk-bundle/platforms/android-19/arch-x86 -fPIC -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -mstackrealign -Wa,--noexecstack -Wformat -Werror=format-security  -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -mstackrealign -Wa,--noexecstack -Wformat -Werror=format-security   -O0 -fno-limit-debug-info -O0 -fno-limit-debug-info  -Wl,--build-id -Wl,--warn-shared-textrel -Wl,--fatal-warnings -Wl,--no-undefined -Wl,-z,noexecstack -Qunused-arguments -Wl,-z,relro -Wl,-z,now -Wl,--build-id -Wl,--warn-shared-textrel -Wl,--fatal-warnings -Wl,--no-undefined -Wl,-z,noexecstack -Qunused-arguments -Wl,-z,relro -Wl,-z,now -shared -Wl,-soname,libnative-lib.so -o ..\..\..\..\build\intermediates\cmake\debug\obj\x86\libnative-lib.so CMakeFiles/native-lib.dir/src/main/cpp/native-lib.cpp.o  -lz ../../../../../../../FFmpegBuild/Openssl/output_19/android/openssl-x86/lib/libcrypto.a ../../../../../../../FFmpegBuild/Openssl/output_19/android/openssl-x86/lib/libssl.a ../../../../../distribution/libavfilter/lib/x86/libavfilter.a ../../../../../distribution/libavformat/lib/x86/libavformat.a ../../../../../distribution/libavcodec/lib/x86/libavcodec.a ../../../../../distribution/libswresample/lib/x86/libswresample.a ../../../../../distribution/libavutil/lib/x86/libavutil.a -lm "D:/AndroidSDK/ndk-bundle/sources/cxx-stl/gnu-libstdc++/4.9/libs/x86/libgnustl_static.a" && cd ."
  
  src/libavformat/tls_openssl.c:125: error: undefined reference to 'BIO_clear_flags'
  
    src/libavformat/tls_openssl.c:102: error: undefined reference to 'BIO_clear_flags'
  
    src/libavformat/tls_openssl.c:116: error: undefined reference to 'BIO_clear_flags'
  
    src/libavformat/tls_openssl.c:116: error: undefined reference to 'BIO_clear_flags'
  
    src/libavformat/tls_openssl.c:309: error: undefined reference to 'SSL_read'
  
    src/libavformat/tls_openssl.c:200: error: undefined reference to 'ERR_get_error'
  
    src/libavformat/tls_openssl.c:200: error: undefined reference to 'ERR_error_string'
  
    src/libavformat/tls_openssl.c:320: error: undefined reference to 'SSL_write'
  
    src/libavformat/tls_openssl.c:200: error: undefined reference to 'ERR_get_error'
  
    src/libavformat/tls_openssl.c:200: error: undefined reference to 'ERR_error_string'
  
    src/libavformat/tls_openssl.c:154: error: undefined reference to 'SSL_library_init'
  
    src/libavformat/tls_openssl.c:155: error: undefined reference to 'SSL_load_error_strings'
  
    src/libavformat/tls_openssl.c:157: error: undefined reference to 'CRYPTO_get_locking_callback'
  
    src/libavformat/tls_openssl.c:159: error: undefined reference to 'CRYPTO_num_locks'
  
    src/libavformat/tls_openssl.c:165: error: undefined reference to 'CRYPTO_num_locks'
  
    src/libavformat/tls_openssl.c:167: error: undefined reference to 'CRYPTO_set_locking_callback'
  
    src/libavformat/tls_openssl.c:186: error: undefined reference to 'CRYPTO_get_locking_callback'
  
    src/libavformat/tls_openssl.c:188: error: undefined reference to 'CRYPTO_set_locking_callback'
  
    src/libavformat/tls_openssl.c:189: error: undefined reference to 'CRYPTO_num_locks'
  
    src/libavformat/tls_openssl.c:208: error: undefined reference to 'SSL_shutdown'
  
    src/libavformat/tls_openssl.c:209: error: undefined reference to 'SSL_free'
  
    src/libavformat/tls_openssl.c:212: error: undefined reference to 'SSL_CTX_free'
  
    src/libavformat/tls_openssl.c:240: error: undefined reference to 'SSLv23_client_method'
  
    src/libavformat/tls_openssl.c:240: error: undefined reference to 'SSL_CTX_new'
  
    src/libavformat/tls_openssl.c:246: error: undefined reference to 'SSL_CTX_ctrl'
  
    src/libavformat/tls_openssl.c:248: error: undefined reference to 'SSL_CTX_load_verify_locations'
  
    src/libavformat/tls_openssl.c:251: error: undefined reference to 'SSL_CTX_use_certificate_chain_file'
  
    src/libavformat/tls_openssl.c:257: error: undefined reference to 'SSL_CTX_use_PrivateKey_file'
  
    src/libavformat/tls_openssl.c:267: error: undefined reference to 'SSL_new'
  
    src/libavformat/tls_openssl.c:284: error: undefined reference to 'BIO_new'
  
    src/libavformat/tls_openssl.c:287: error: undefined reference to 'SSL_set_bio'
  
    src/libavformat/tls_openssl.c:290: error: undefined reference to 'SSL_accept'
  
    src/libavformat/tls_openssl.c:240: error: undefined reference to 'SSLv23_server_method'
  
    src/libavformat/tls_openssl.c:258: error: undefined reference to 'ERR_get_error'
  
    src/libavformat/tls_openssl.c:258: error: undefined reference to 'ERR_error_string'
  
    src/libavformat/tls_openssl.c:208: error: undefined reference to 'SSL_shutdown'
  
    src/libavformat/tls_openssl.c:209: error: undefined reference to 'SSL_free'
  
    src/libavformat/tls_openssl.c:212: error: undefined reference to 'SSL_CTX_free'
  
    src/libavformat/tls_openssl.c:290: error: undefined reference to 'SSL_connect'
  
    src/libavformat/tls_openssl.c:200: error: undefined reference to 'ERR_get_error'
  
    src/libavformat/tls_openssl.c:200: error: undefined reference to 'ERR_error_string'
  
    src/libavformat/tls_openssl.c:266: error: undefined reference to 'SSL_CTX_set_verify'
  
    src/libavformat/tls_openssl.c:289: error: undefined reference to 'SSL_ctrl'
  
    clang++.exe: error: linker command failed with exit code 1 (use -v to see invocation)
  
    ninja: build stopped: subcommand failed.

• Screen Recording issue using FFMPEG in Android

  12 décembre 2014, par flight

  We are trying to record Android screen using the below commands.

  ffmpeg -y -vcodec rawvideo -f rawvideo -pix_fmt rgb32 -s 320x480 -i /dev/graphics/fb0 /sdcard/output.mp4

  And

  ffmpeg -y -vcodec rawvideo -f rawvideo -pix_fmt rgb32 -s 320x480 -f fbdev /sdcard/output.mp4

  The Logcat output is given below :

  12-12 10:52:04.722: I/ffmpeg4android(27954): ===============Running command from thread path: /sdcard/videokit
  
  12-12 10:52:04.722: I/ffmpeg4android(27954): =======ProgressBackgroundRemote doInBackground=========
  
  12-12 10:52:04.722: I/ffmpeg4android(27954): videokitLibPath: /data/data/com.unscriptd.videoapp/lib/libvideokit.so
  
  12-12 10:52:04.722: I/ffmpeg4android(27954): ffmpeg4android_isComplex: true
  
  12-12 10:52:04.732: I/Videokit(27954): dlopen libvideokit from path: /data/data/com.unscriptd.videoapp/lib/libvideokit.so
  
  12-12 10:52:04.762: W/linker(27954): libvideokit.so has text relocations. This is wasting memory and is a security risk. Please fix.
  
  12-12 10:52:04.892: I/GAV2(27800): Thread[GAThread,5,main]: No campaign data found.
  
  12-12 10:52:04.912: I/Videokit(27954): libvideokit.so loaded
  
  12-12 10:52:04.912: I/Videokit(27954): args is not NULL
  
  12-12 10:52:04.912: I/Videokit(27954): more then one arg
  
  12-12 10:52:04.912: I/Videokit(27954): function symbol found
  
  12-12 10:52:04.912: D/Videokit(27954): Calling videokit run via loader
  
  12-12 10:52:04.912: I/Videokit(27954): vk ffmpeg sdcardPath: /sdcard/videokit
  
  12-12 10:52:04.912: D/Videokit(27954): call licenseCheckComplex
  
  12-12 10:52:04.912: I/Videokit(27954): licenseCheck in path: /sdcard/videokit
  
  12-12 10:52:04.912: I/Videokit(27954): isLicExistsComplex...
  
  12-12 10:52:04.912: I/Videokit(27954): trying to open /sdcard/videokit/ffmpeglicense.lic
  
  12-12 10:52:04.912: I/Videokit(27954): license file found...
  
  12-12 10:52:04.912: I/Videokit(27954): Permanent license validated.
  
  12-12 10:52:04.912: D/Videokit(27954): license check rc: 1
  
  12-12 10:52:04.912: D/Videokit(27954): run() called
  
  12-12 10:52:05.062: D/Videokit(27954): videokit call finished, calling dlclose
  
  12-12 10:52:05.062: I/ffmpeg4android(27954): RemoteService: FFMPEG finished.
  
  12-12 10:52:05.062: I/ffmpeg4android(27954): RemoteService: removing notification.
  
  12-12 10:52:05.062: I/ffmpeg4android(27954): Cancel notification: 5326
  
  12-12 10:52:08.822: D/ffmpeg4android(27873): dur: null
  
  12-12 10:52:08.822: I/ffmpeg4android(27873): dur is not good, not setting
  
  12-12 10:52:08.822: I/ffmpeg4android(27873): _durationOfCurrentWaitIndex is equal to: 6 reseting.
  
  12-12 10:52:08.822: I/ffmpeg4android(27873): setting fake Prefs.durationOfCurrent
  
  12-12 10:52:08.822: W/ffmpeg4android(27873): setting fake Prefs.durationOfCurrent (Cant get from file): 00:03:00.00
  
  12-12 10:52:08.822: W/ffmpeg4android(27873): /sdcard/videokit/ffmpeg4android.log: open failed: ENOENT (No such file or directory)
  
  12-12 10:52:08.822: I/ffmpeg4android(27873): ==== getting currentVkLogSize from FFmpeg4Android log
  
  12-12 10:52:08.822: W/ffmpeg4android(27873): Looks like Vk log is not increasing in size
  
  12-12 10:52:08.822: I/ffmpeg4android(27873): No ffmpeg4android_log file, using vk log
  
  12-12 10:52:08.822: I/line(27873): eg_parse_options
  
  12-12 10:52:08.822: I/line(27873): ffmpeg4android: ffmpeg_parse_options not passed
  
  12-12 10:52:08.822: I/line(27873): exit_program: 1
  
  12-12 10:52:08.822: I/line(27873): ffmpeg4android: 1
  
  12-12 10:52:08.822: W/ffmpeg4android(27873): error line: ffmpeg4android: 1
  
  12-12 10:52:08.822: W/ffmpeg4android(27873): Looks like error in the log
  
  12-12 10:52:08.822: D/ffmpeg4android(27873): currentTimeStr: error
  
  12-12 10:52:08.822: D/ffmpeg4android(27873): ============Found error in the log============
  
  12-12 10:52:08.822: I/ffmpeg4android(27873): onProgressUpdate: 100
  
  12-12 10:52:08.822: D/ffmpeg4android(27873): Releasing wake lock
  
  12-12 10:52:08.822: D/ffmpeg4android(27873): TranscodeBackground onPostExecute
  
  12-12 10:52:08.822: D/ffmpeg4android(27954): set transcodingProgress: 100
  
  12-12 10:52:08.832: D/ffmpeg4android(27873): nullnull length in bytes: 0
  
  12-12 10:52:08.832: D/ffmpeg4android(27873): showNotifications
  
  12-12 10:52:08.832: I/ffmpeg4android(27873): ============ Transcoding Failed, caling fexist

• Error recording an RTSP stream without transcoding

  23 août 2017, par Matt

  I’m trying to use FFmpeg to record RTSP streams from several security cameras. I have been successfully transcoding each stream for months now, but since this requires considerable CPU power, I’d like to simply copy each stream to disk in it’s original H.264 format.

  Whenever I try this, I receive and error similar to this (the "current" value varies) :

  Non-monotonous DTS in output stream 0:0 ; previous : 0, current : -62743 ;

  I’ve stripped most of the options I was using, although I really do want to keep -xerror so that FFmpeg quits when it encounters an error :

  ffmpeg.exe -xerror -i rtsp://admin:admin@192.168.1.135 -an -vcodec copy test.mp4

  And I still get this :

      ffmpeg version 3.3.3 Copyright (c) 2000-2017 the FFmpeg developers  
      built with gcc 7.1.0 (GCC)   
      configuration : —enable-gpl
      —enable-version3 —enable-cuda —enable-cuvid —enable-d3d11va —enable-dxva2 —enable-libmfx —enable-nvenc —enable-avisynth —enable-bzlib —enable-fontconfig —enable-frei0r —enable-gnutls —enable-iconv —enable-libass —enable-libbluray —enable-libbs2b —enable-libcaca —enable-libfreetype —enable-libgme —enable-libgsm —enable-libilbc —enable-libmodplug —enable-libmp3lame —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libopenh264 —enable-libopenjpeg —enable-libopus —enable-librtmp —enable-libsnappy —enable-libsoxr —enable-libspeex —enable-libtheora —enable-libtwolame —enable-libvidstab —enable-libvo-amrwbenc —enable-libvorbis —enable-libvpx —enable-libwavpack —enable-libwebp —enable-libx264 —enable-libx265 —enable-libxavs —enable-libxvid —enable-libzimg —enable-lzma —enable-zlib   
      libavutil      55. 58.100 / 55. 58.100   
      libavcodec     57. 89.100 / 57. 89.100   
      libavformat    57. 71.100 / 57. 71.100   
      libavdevice    57.  6.100 / 57.  6.100   
      libavfilter     6. 82.100 / 6. 82.100   
      libswscale      4.  6.100 / 4.  6.100  
      libswresample   2.  7.100 / 2.  7.100   
      libpostproc    54.  5.100 / 54.  5.100
      [udp @ 0000000002533b60] ’circular_buffer_size’ option was set but it is not supported on this build (pthread support is required) 
      [udp @ 0000000000ec97a0] ’circular_buffer_size’ option was set but it is not supported on this build (pthread support is required) 
      Input #0, rtsp, from ’rtsp ://admin:admin@192.168.1.135’ :   Metadata :
          title : RTSP Session/2.0   Duration : N/A, start : 0.837144, bitrate : N/A
          Stream #0:0 : Video : h264 (High), yuvj420p(pc, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 7 fps, 25 tbr, 90k tbn, 14 tbc Output
      #0, mp4, to ’test.mp4’ :   Metadata :
          title : RTSP Session/2.0
      y    encoder : Lavf57.71.100
          Stream #0:0 : Video : h264 (High) ([33][0][0][0] / 0x0021), yuvj420p(pc, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 7 fps, 25 tbr, 90k tbn, 90k tbc 
      Stream mapping :   Stream #0:0 -> #0:0 (copy) 
      Press [q] to stop, [?] for help
      [mp4 @ 00000000036b8340] Non-monotonous DTS in output stream 0:0 ; previous : 0, current : -62743 ; aborting.
      Conversion failed !
  

  Can anyone explain what the problem is and/or suggest the appropriate flags to handle this ?