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• Compiling ffmpeg for Android using Linux

  1er juillet 2015, par VEP10

  I’d like to test the ijkplayer for android project according to this :
  https://github.com/bbcallen/ijkplayer/blob/master/README.md
  When I am compiling the ffmpeg (./compile-ffmpeg.sh) at the "configurate ffmpeg" phase I get the following message : arm-linux-androideabi-gcc is unable to create an executable file. C compiler test failed.
  This part of the compile-ffmpeg.sh file :

  echo "\n--------------------"
  
  echo "[*] configurate ffmpeg"
  
  echo "--------------------"
  
  cd $FF_SOURCE
  
  if [ -f "./config.h" ]; then
  
      echo 'reuse configure'
  
  else
  
      ./configure $FF_CFG_FLAGS \
  
          --extra-cflags="$FF_CFLAGS $FF_EXTRA_CFLAGS" \
  
          --extra-ldflags="$FF_DEP_LIBS $FF_EXTRA_LDFLAGS"
  
      make clean
  
  fi 

  At the end of the config.log file I found the problem :

  zoompan_filter_deps='swscale'
  
  WARNING: arm-linux-androideabi-pkg-config not found, library detection may fail.
  
  mktemp -u XXXXXX
  
  tHt73A
  
  check_ld cc
  
  check_cc
  
  BEGIN /tmp/ffconf.mvjZdW0f.c
  
      1   int main(void){ return 0; }
  
  END /tmp/ffconf.mvjZdW0f.c
  
  arm-linux-androideabi-gcc -O3 -Wall -pipe -std=c99 -ffast-math -fstrict aliasing -Werror=strict-aliasing -Wno-psabi -Wa,--noexecstack -DANDROID -DNDEBUG -march=armv7-a -mcpu=cortex-a8 -mfpu=vfpv3-d16 -mfloat-abi=softfp -mthumb -mcpu=cortex-a8 -c -o /tmp/ffconf.ZKAEl7Bh.o /tmp/ffconf.mvjZdW0f.c
  
  as: unrecognized option '-mcpu=cortex-a8'
  
  C compiler test failed.

  I am sure that the assembler knows the cortex-a8 cpu option. The problem is anywhere else.

  Environment :

  Ubuntu 14.04

  NDK : r10e

  arm-linux-androideabi-4.8

  gcc-4.6

  Please help !

• ffmpeg with Quick Sync Video (qsv) gets stuck

  28 avril 2023, par Juliano B. Nequirito

  I've compiled ffmpeg in an Arch Linux distribution with support to Intel Quick Sync Video. But ffmpeg gets stuck when I try to run it :

  


  $ ffmpeg -debug -hwaccel qsv -qsv_device /dev/dri/renderD128 -c:v h264_qsv -i test_video.mp4 -c:v hevc_qsv output.mp4

ffmpeg version N-109562-g0431f9805e Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 12.2.0 (GCC)
  configuration: --prefix=/usr --extra-cflags=-I/opt/cuda/include --extra-ldflags=-L/opt/cuda/lib64 --enable-lto --disable-rpath --enable-gpl --enable-version3 --enable-nonfree --enable-shared --disable-static --disable-stripping --enable-gray --enable-alsa --enable-avisynth --enable-bzlib --enable-chromaprint --enable-frei0r --enable-gcrypt --enable-gmp --enable-gnutls --enable-iconv --enable-ladspa --enable-lcms2 --enable-libaom --enable-libaribb24 --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcelt --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libdavs2 --enable-libdc1394 --enable-libfdk-aac --enable-libflite --enable-fontconfig --enable-libfreetype --enable-libfribidi --enable-libglslang --enable-libgme --enable-libgsm --enable-libiec61883 --enable-libilbc --enable-libjack --enable-libjxl --enable-libklvanc --enable-libkvazaar --enable-liblensfun --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-libopencv --enable-libopenh264 --enable-libopenjpeg --enable-libopenmpt --disable-libopenvino --enable-libopus --enable-libplacebo --enable-libpulse --enable-librabbitmq --enable-librav1e --enable-librist --enable-librsvg --enable-librubberband --enable-librtmp --enable-libshine --enable-libsmbclient --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libsvthevc --enable-libsvtvp9 --disable-libtensorflow --enable-libtesseract --enable-libtheora --disable-libtls --enable-libtwolame --enable-libuavs3d --enable-libv4l2 --enable-libvidstab --enable-libvmaf --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxavs2 --enable-libxcb --enable-libxcb-shm --enable-libxcb-xfixes --enable-libxcb-shape --enable-libxvid --enable-libxml2 --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-lzma --enable-decklink --disable-mbedtls --enable-libmysofa --enable-openal --enable-opencl --enable-opengl --disable-openssl --enable-pocketsphinx --enable-sndio --enable-sdl2 --enable-vapoursynth --enable-vulkan --enable-xlib --enable-zlib --enable-amf --enable-cuda-nvcc --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-libdrm --enable-libvpl --enable-libnpp --enable-nvdec --enable-nvenc --enable-omx --enable-rkmpp --enable-v4l2-m2m --enable-vaapi --enable-vdpau
  libavutil      57. 43.100 / 57. 43.100
  libavcodec     59. 56.100 / 59. 56.100
  libavformat    59. 34.102 / 59. 34.102
  libavdevice    59.  8.101 / 59.  8.101
  libavfilter     8. 53.100 /  8. 53.100
  libswscale      6.  8.112 /  6.  8.112
  libswresample   4.  9.100 /  4.  9.100
  libpostproc    56.  7.100 / 56.  7.100
 matched as AVOption 'debug' with argument '-hwaccel'.
Reading option 'qsv' ... matched as output url.
Reading option '-qsv_device' ... matched as option 'qsv_device' (set QSV hardware device (DirectX adapter index, DRM path or X11 display name)) with argument '/dev/dri/renderD128'.
Reading option '-c:v' ... matched as option 'c' (codec name) with argument 'h264_qsv'.
Reading option '-i' ... matched as input url with argument 'test_video.mp4'.
Reading option '-c:v' ... matched as option 'c' (codec name) with argument 'hevc_qsv'.
Reading option 'output.mp4' ... matched as output url.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option qsv_device (set QSV hardware device (DirectX adapter index, DRM path or X11 display name)) with argument /dev/dri/renderD128.
[AVHWDeviceContext @ 0x5590d517ee40] libva: VA-API version 1.17.0
[AVHWDeviceContext @ 0x5590d517ee40] libva: User requested driver 'iHD'
[AVHWDeviceContext @ 0x5590d517ee40] libva: Trying to open /usr/lib/dri/iHD_drv_video.so
[AVHWDeviceContext @ 0x5590d517ee40] libva: Found init function __vaDriverInit_1_16
[AVHWDeviceContext @ 0x5590d517ee40] libva: va_openDriver() returns 0
[AVHWDeviceContext @ 0x5590d517ee40] Initialised VAAPI connection: version 1.17
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x41524742 -> bgra.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x42475241 -> argb.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x41424752 -> rgba.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x52474241 -> abgr.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x58524742 -> bgr0.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x42475258 -> 0rgb.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x58424752 -> rgb0.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x52474258 -> 0bgr.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x30335241 -> unknown.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x30334241 -> unknown.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x30335258 -> x2rgb10le.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x30334258 -> unknown.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x36314752 -> unknown.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x50424752 -> unknown.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x50524742 -> unknown.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x56555941 -> unknown.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x30303859 -> gray.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x3231564e -> nv12.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x3132564e -> unknown.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x32595559 -> yuyv422.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x59565955 -> uyvy422.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x32315659 -> yuv420p.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x30323449 -> yuv420p.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x50313134 -> yuv411p.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x48323234 -> yuv422p.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x56323234 -> yuv440p.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x50343434 -> yuv444p.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x33434d49 -> unknown.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x30313050 -> p010le.
[AVHWDeviceContext @ 0x5590d517ee40] VAAPI driver: Intel iHD driver for Intel(R) Gen Graphics - 22.6.4 ().
[AVHWDeviceContext @ 0x5590d517ee40] Driver not found in known nonstandard list, using standard behaviour.
[AVHWDeviceContext @ 0x5590d517e940] Use Intel(R) oneVPL to create MFX session, API version is 2.6, the required implementation version is 1.3


  


  CPU starts being used intensively and then nothing happens.
Does anybody have any clue on it ?

  


  I have an Intel i7-8550U (8th gen Kaby Lake) processor with 4 cores (8 threads).

  


  I have also used these options to ffmpeg, getting the same results :

  


  ffmpeg -loglevel debug -init_hw_device qsv=hw -filter_hw_device hw -hwaccel qsv -hwaccel_output_format qsv -i test_video.mp4 -vf 'format=qsv,hwupload=extra_hw_frames=64' -c:v hevc_qsv -f mp4 output.mp4


  


  With VAAPI, transcoding runs flowlessly :

  


  ffmpeg -init_hw_device vaapi=intel:/dev/dri/renderD128 -hwaccel vaapi -hwaccel_output_format vaapi -hwaccel_device intel -filter_hw_device intel -i test_video.mp4 -c:v hevc_vaapi -f mp4 output.mp4


  


• Using openCV library with Java works well on Linux but not on Windows

  6 août 2016, par user3586330

  I have a method that takes screenshots on absolute intervals (25%, 50%, 75% and 100%) from a video-file and save each of them to a separate .png-file. I use openCV with the JavaCV-Wrapper library to do that. The class/method of interest is :

  package de.stal.videoreporter;
  
  
  
  import org.bytedeco.javacpp.opencv_core;
  
  import static org.bytedeco.javacpp.opencv_imgcodecs.cvSaveImage;
  
  import org.bytedeco.javacv.FFmpegFrameGrabber;
  
  import org.bytedeco.javacv.Frame;
  
  import org.bytedeco.javacv.FrameGrabber;
  
  import org.bytedeco.javacv.OpenCVFrameConverter;
  
  
  
  class VideoThumbnailer {
  
  public void createThumbnails(String videoname) throws FrameGrabber.Exception {
  
  
  
      FFmpegFrameGrabber g = new FFmpegFrameGrabber("videos/" + videoname);
  
      g.start();
  
      OpenCVFrameConverter.ToIplImage converterToIplImage = new OpenCVFrameConverter.ToIplImage();
  
      int length = g.getLengthInFrames();
  
      int fifty = length / 2;
  
      int twentyfive = fifty / 2;
  
      int seventyfive = fifty + twentyfive;
  
      int hundred = length - 1;
  
  
  
      //each frame of video
  
      for (int j = 0; j < length; j++) {
  
  
  
          if (j == twentyfive || j == fifty || j == seventyfive || j == hundred) {
  
              String ss = "";
  
              if (j == twentyfive) {
  
                  ss = "25";
  
              } else if (j == fifty) {
  
                  ss = "50";
  
              } else if (j == seventyfive) {
  
                  ss = "75";
  
              } else if (j == hundred) {
  
                  ss = "100";
  
              }
  
  
  
              g.setFrameNumber(j);
  
  
  
              Frame f = g.grabImage();
  
  
  
              opencv_core.IplImage image = converterToIplImage.convert(f);
  
              String img_path = "thumbnails/" + videoname + "." + ss + ".png";
  
              cvSaveImage(img_path, image);
  
          }
  
  
  
      }
  
      g.stop();
  
  }
  
  }

  That works fine on environment : Ubuntu 15.10 x64, Java v.1.7.0_101 and Netbeans 8.0.2 with Maven. So I exported the project to a runnable jar-file(with all dependencies included) and tried to start it on Windows 10 x64 via :

  java -jar VideoReporter-1.0-SNAPSHOT-jar-with-dependencies.jar

  On Windows an exception will be thrown when executing the .jar-file :

  Error putting member offsets for class org/bytedeco/javacpp/avutil$Pool_free_Pointer.
  
  Exception in thread "main" java.lang.NoClassDefFoundError: Could not initialize class org.bytedeco.javacpp.avutil
  
      at java.lang.Class.forName0(Native Method)
  
      at java.lang.Class.forName(Unknown Source)
  
      at org.bytedeco.javacpp.Loader.load(Loader.java:472)
  
      at org.bytedeco.javacpp.Loader.load(Loader.java:417)
  
      at org.bytedeco.javacpp.avformat$AVFormatContext.<clinit>(avformat.java:2719)
  
      at org.bytedeco.javacv.FFmpegFrameGrabber.startUnsafe(FFmpegFrameGrabber.java:391)
  
      at org.bytedeco.javacv.FFmpegFrameGrabber.start(FFmpegFrameGrabber.java:385)
  
      at de.stal.videoreporter.VideoThumbnailer.createThumbnails(VideoThumbnailer.java:15)
  
      at de.stal.videoreporter.MetaReader.slurpMetadata(MetaReader.java:67)
  
      at de.stal.videoreporter.VideoReporter.main(VideoReporter.java:19)
  
  </clinit>

  My pom.xml is :

  <?xml version="1.0" encoding="UTF-8"?>
  
  <project xmlns="http://maven.apache.org/POM/4.0.0">
  
  <modelversion>4.0.0</modelversion>
  
  <groupid>de.stal</groupid>
  
  <artifactid>VideoReporter</artifactid>
  
  <version>1.0-SNAPSHOT</version>
  
  <packaging>jar</packaging>
  
  <properties>
  
      UTF-8
  
      1.7
  
      1.7
  
  </properties>
  
  <build>
  
      <plugins>
  
          <plugin>
  
              <artifactid>maven-assembly-plugin</artifactid>
  
              <configuration>
  
                  <archive>
  
                      <manifest>
  
                          <mainclass>de.stal.videoreporter.VideoReporter</mainclass>
  
                      </manifest>
  
                  </archive>
  
                  <descriptorrefs>
  
                      <descriptorref>jar-with-dependencies</descriptorref>
  
                  </descriptorrefs>
  
              </configuration>
  
              <executions>
  
                  <execution>
  
                      <id>make-assembly</id>
  
                      <phase>package</phase> 
  
                      <goals>
  
                          <goal>single</goal>
  
                      </goals>
  
                  </execution>
  
              </executions>
  
          </plugin>
  
      </plugins>
  
  </build>
  
  <dependencies>
  
      <dependency>
  
          <groupid>org.apache.commons</groupid>
  
          <artifactid>commons-csv</artifactid>
  
          <version>1.1</version>
  
      </dependency>
  
      <dependency>
  
          <groupid>org.bytedeco</groupid>
  
          <artifactid>javacpp</artifactid>
  
          <version>1.2.1</version>
  
      </dependency>
  
      <dependency>
  
          <groupid>org.bytedeco</groupid>
  
          <artifactid>javacv</artifactid>
  
          <version>1.2</version>
  
      </dependency>
  
      <dependency>
  
          <groupid>com.fasterxml.jackson.dataformat</groupid>
  
          <artifactid>jackson-dataformat-csv</artifactid>
  
          <version>2.8.0.rc2</version>
  
      </dependency>
  
      <dependency>
  
          <groupid>javassist</groupid>
  
          <artifactid>javassist</artifactid>
  
          <version>3.12.1.GA</version>
  
      </dependency>
  
      <dependency>
  
          <groupid>commons-collections</groupid>
  
          <artifactid>commons-collections</artifactid>
  
          <version>3.2.1</version>
  
      </dependency>
  
      <dependency>
  
          <groupid>com.opencsv</groupid>
  
          <artifactid>opencsv</artifactid>
  
          <version>3.3</version>
  
      </dependency>
  
  </dependencies>
  
  </project>

  What might be the problem on Windows ? In my opinion there shouldn’t be a problem with access to openCV/FFMPEG-classes because they all have been included the .jar-file ? Is this a problem with the classpath ?

  Thanks, Peter