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• Using Gstreamer or ffmpeg to create rtsp client on Android

  9 décembre 2014, par Pankaj Bansal

  I want to stream a rtsp stream on android and I finally have come to
  conclusion that I can’t use android API’s MediaPlayer,Videoview etc because
  latency is big issue for me. I need an latency of <500 ms. Now I am
  planning to use Gstreamer or ffmpeg to create an android rtsp client. I just have few
  doubts

  1. Will the Gstreamer or ffmpeg client be able to provide latency <500ms. I read there are
     some parameters which I can tweak to get very low latency. Just want to
     confirm. I have very good network bandwidth. The frame size is generally
     1920X1080.

  2. I read Gstreamer is one made one level above ffmpeg and uses ffmpeg
     codecs to work. I want to know which one is easier to work with for creating an android client. Working on Gstreamer or workig directly on ffmpeg.

  3. If I use Gstreamer android client, Will I have to use the Gstreamer server as well to stream the data ? Currently I am using Live555 RTSP server to stream data

• ffmpeg transcoding example not working on android

  10 mars 2015, par Yogesh Kulkarni

  I am trying to run transcoding example of ffmpeg from here and from here on android, but getting following error

  03-10 16:27:56.903: E/TRANSCODING(8616): Cannot open video encoder for stream #0

  I am getting this error when I try to initialize AVCodecContext* for output file ret = avcodec_open2(enc_ctx, codec, NULL); in method static int open_input_file(const char *filename)

  I have compiled ffmpeg for android and included in my android project and I am calling this transcoding.c from jni.

  I tried this code on many video files with different encoding, but no luck. I have also checked that the given encoder/decoder is available in android device or not.

  Anyone know why I am getting this error ?

  Thanks.

• Compiling x265 with ffmpeg for Android and receiving errors

  5 juillet 2019, par m33ts4k0z

  Trying to compile x265 for use with arm64-v8a. After successuful build of x265 itself, I receive the following error when ffmpeg is about to compile :

  require_pkg_config libx265 x265 x265.h x265_api_get
  
  check_pkg_config libx265 x265 x265.h x265_api_get
  
  test_pkg_config libx265 x265 x265.h x265_api_get
  
  /root/ffmpeg_android/ffmpeg-android-1.6.3/ffmpeg-pkg-config --exists --print-errors x265
  
  check_func_headers x265.h x265_api_get -I/root/ffmpeg_android/ffmpeg-android-1.6.3/jni/x265/android/arm64-v8a/include/x265 -L/root/ffmpeg_android/ffmpeg-android-1.6.3/jni/x265/android/arm64-v8a/lib -lx265
  
  test_ld cc -I/root/ffmpeg_android/ffmpeg-android-1.6.3/jni/x265/android/arm64-v8a/include/x265 -L/root/ffmpeg_android/ffmpeg-android-1.6.3/jni/x265/android/arm64-v8a/lib -lx265
  
  test_cc -I/root/ffmpeg_android/ffmpeg-android-1.6.3/jni/x265/android/arm64-v8a/include/x265 -L/root/ffmpeg_android/ffmpeg-android-1.6.3/jni/x265/android/arm64-v8a/lib
  
  BEGIN /tmp/ffconf.xKyjnplW/test.c
  
      1   #include 
  
      2   #include 
  
      3   long check_x265_api_get(void) { return (long) x265_api_get; }
  
      4   int main(void) { int ret = 0;
  
      5    ret |= ((intptr_t)check_x265_api_get) & 0xFFFF;
  
      6   return ret; }
  
  END /tmp/ffconf.xKyjnplW/test.c
  
  /root/ffmpeg_android/ffmpeg-android-1.6.3/toolchain-android/bin/aarch64-linux-android-clang -DANDROID -fpic -fpie -march=armv8-a --sysroot=/root/ffmpeg_android/ffmpeg-android-1.6.3/toolchain-android/sysroot -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Dstrtod=avpriv_strtod -DPIC -DANDROID -fpic -fpie -march=armv8-a -I/root/ffmpeg_android/ffmpeg-android-1.6.3/jni/vpx/android/arm64-v8a/include -I/root/ffmpeg_android/ffmpeg-android-1.6.3/jni/x264/android/arm64-v8a/include/x264 -I/root/ffmpeg_android/ffmpeg-android-1.6.3/jni/x265/android/arm64-v8a/include/x265 -I/root/ffmpeg_android/ffmpeg-android-1.6.3/jni/lame/android/arm64-v8a/include -DANDROID -fpic -fpie -march=armv8-a --static -mcpu=cortex-a57 -std=c11 -fPIE -fomit-frame-pointer -fPIC -I/root/ffmpeg_android/ffmpeg-android-1.6.3/jni/x265/android/arm64-v8a/include/x265 -L/root/ffmpeg_android/ffmpeg-android-1.6.3/jni/x265/android/arm64-v8a/lib -c -o /tmp/ffconf.xKyjnplW/test.o /tmp/ffconf.xKyjnplW/test.c
  
  clang60: warning: argument unused during compilation: '-L/root/ffmpeg_android/ffmpeg-android-1.6.3/jni/x265/android/arm64-v8a/lib' [-Wunused-command-line-argument]
  
  /root/ffmpeg_android/ffmpeg-android-1.6.3/toolchain-android/bin/aarch64-linux-android-clang -Wl,-z,defs -Wl,--unresolved-symbols=report-all -march=armv8-a -L/root/ffmpeg_android/ffmpeg-android-1.6.3/toolchain-android/sysroot -Wl,-z,relro -Wl,-z,now -L/root/ffmpeg_android/ffmpeg-android-1.6.3/jni/vpx/android/arm64-v8a/lib -L/root/ffmpeg_android/ffmpeg-android-1.6.3/jni/x264/android/arm64-v8a/lib -L/root/ffmpeg_android/ffmpeg-android-1.6.3/jni/x265/android/arm64-v8a/lib -L/root/ffmpeg_android/ffmpeg-android-1.6.3/jni/lame/android/arm64-v8a/lib -Wl,-z,defs -Wl,--unresolved-symbols=report-all -march=armv8-a -L/root/ffmpeg_android/ffmpeg-android-1.6.3/toolchain-android/sysroot -Wl,-z,relro -Wl,-z,now --static --sysroot=/root/ffmpeg_android/ffmpeg-android-1.6.3/toolchain-android/sysroot -mcpu=cortex-a57 -Wl,--as-needed -Wl,-z,noexecstack -fPIE -pie -I/root/ffmpeg_android/ffmpeg-android-1.6.3/jni/x265/android/arm64-v8a/include/x265 -L/root/ffmpeg_android/ffmpeg-android-1.6.3/jni/x265/android/arm64-v8a/lib -o /tmp/ffconf.xKyjnplW/test /tmp/ffconf.xKyjnplW/test.o -lx265 -lgcc
  
  clang60: warning: argument unused during compilation: '-pie' [-Wunused-command-line-argument]
  
  /root/ffmpeg_android/ffmpeg-android-1.6.3/toolchain-android/bin/../lib/gcc/aarch64-linux-android/4.9.x/../../../../aarch64-linux-android/bin/ld: skipping incompatible /root/ffmpeg_android/ffmpeg-android-1.6.3/jni/x265/android/arm64-v8a/lib/libx265.a when searching for -lx265
  
  /root/ffmpeg_android/ffmpeg-android-1.6.3/toolchain-android/bin/../lib/gcc/aarch64-linux-android/4.9.x/../../../../aarch64-linux-android/bin/ld: skipping incompatible /root/ffmpeg_android/ffmpeg-android-1.6.3/jni/x265/android/arm64-v8a/lib/libx265.a when searching for -lx265
  
  /root/ffmpeg_android/ffmpeg-android-1.6.3/toolchain-android/bin/../lib/gcc/aarch64-linux-android/4.9.x/../../../../aarch64-linux-android/bin/ld: cannot find -lx265
  
  clang60: error: linker command failed with exit code 1 (use -v to see invocation)
  
  ERROR: x265 not found using pkg-config

  I use ffmpeg 4.1.3 and the latest version of x265 sources. I use this project to compile and I have succeeded when building without x265. I compile on Debian Buster x64.