Recherche avancée

Sur d’autres sites (6437)

• Installing FFMPEG on my EC2 instance takes too long ; what am I doing wrong ? [closed]

  24 août 2023, par Shaban Khawar

  I found a good article on how to download onto my EC2 instance : link
Here's the issue. It takes forever ! It takes around 15 minutes to install.

  


  I'm running my EC2 instance on Amazon Linux 2023, so no apt-get for me.
Also my EC2 instance is created by my EB environment, so if auto-scaling occurs, my instance will be terminated and a new one will be created. I can set .ebextensions to run all the commands to install FFMPEG again but as mentioned above, it takes forever ! That means for 15-20 minutes, my server is down because of one dependancy. I feel like I'm going about this the wrong way, so any advice is appreciated.

  


• lavc/qsvenc_hevc : restore the default gop size

  11 août 2023, par Haihao Xiang

  lavc/qsvenc_hevc : restore the default gop size
  commit a3c0a3e changed the default settings and expected the runtime can
  
  choose a best value. However the runtime doesn't set a valid gop size
  
  for hevc encoder, hence the output steam is non-seekable, which is
  
  inconvenient to user [1][2]
  [1] https://github.com/intel/media-driver/issues/1576
  
  [2] https://ffmpeg.org/pipermail/ffmpeg-user/2023-August/056716.html
  Signed-off-by : Haihao Xiang <haihao.xiang@intel.com>
  

  • [DH] libavcodec/qsvenc_hevc.c

• Frames from Video Using OpenCV in Ubuntu with Java 17

  2 août 2023, par bstrdn

  I've been trying to extract frames from a video using OpenCV in an Ubuntu environment with Java 17, but all my attempts have been unsuccessful so far. The main issue is that ffmpeg is not detected by the OpenCV library on ubuntu.

  


  Here's my test code :

  


  Main class

  


  import org.opencv.core.Core;
import org.opencv.videoio.VideoCapture;

public class Main {
  public static String videoPath = "";
  static {
    String osName = System.getProperty("os.name").toLowerCase();
    if (osName.contains("win")) {
      System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
      videoPath = ClassLoader.getSystemResource("video.mp4").getPath();
    } else {
      videoPath = "/video.mp4";
//      System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
      System.load("/usr/lib/opencv_java470.so");
    }
  }

  public static void main(String[] args) throws InterruptedException {
    VideoCapture videoCapture = new VideoCapture(videoPath);
    if (!videoCapture.isOpened()) {
      System.out.println("Error opening video file.");
    } else {
      System.out.println("Everything is fine.");
    }
    System.out.println(Core.getBuildInformation());
    Thread.sleep(1000000000000000000L);
  }
}


  


  Maven :

  


  &lt;?xml version="1.0" encoding="UTF-8"?>&#xA;<project xmlns="http://maven.apache.org/POM/4.0.0">&#xA;  <modelversion>4.0.0</modelversion>&#xA;  <parent>&#xA;    <groupid>org.springframework.boot</groupid>&#xA;    <artifactid>spring-boot-starter-parent</artifactid>&#xA;    <version>3.0.2</version>&#xA;    <relativepath></relativepath> &#xA;  </parent>&#xA;  <groupid>org.example</groupid>&#xA;  <artifactid>untitled</artifactid>&#xA;  <version>1.0-SNAPSHOT</version>&#xA;  <properties>&#xA;    17&#xA;    17&#xA;    UTF-8&#xA;  </properties>&#xA;&#xA;<dependencies>&#xA;<dependency>&#xA;  <groupid>org.bytedeco</groupid>&#xA;  <artifactid>opencv-platform</artifactid>&#xA;  <version>4.7.0-1.5.9</version>&#xA;</dependency>&#xA;&#xA;<dependency>&#xA;  <groupid>org.springframework.boot</groupid>&#xA;  <artifactid>spring-boot-starter-web</artifactid>&#xA;</dependency>&#xA;</dependencies>&#xA;<build>&#xA;<plugins>&#xA;  <plugin>&#xA;    <groupid>org.springframework.boot</groupid>&#xA;    <artifactid>spring-boot-maven-plugin</artifactid>&#xA;  </plugin>&#xA;</plugins>&#xA;</build>&#xA;</project>&#xA;

  


  Dockerfile :

  


  FROM ubuntu:20.04
RUN apt-get update && apt-get install -y openjdk-17-jdk
RUN apt-get update && apt-get install -y pkg-config
RUN apt-get update && apt-get install -y ffmpeg libavformat-dev libavcodec-dev libswscale-dev libavresample-dev
ENV JAVA_HOME /usr/lib/jvm/java-17-openjdk-amd64
COPY target/*.jar /app.jar
COPY src/main/resources/video.mp4 /
COPY opencv_java470.so /usr/lib
ENV JAVA_TOOL_OPTIONS="-Djava.library.path=/usr/lib:/lib:/usr/local/lib:/usr/local:/usr/lib/x86_64-linux-gnu"
ENV LD_LIBRARY_PATH=/usr/lib:/lib:/usr/local/lib:/usr/local:/usr/lib/x86_64-linux-gnu
ENTRYPOINT [ "sh", "-c", "java $JAVA_TOOL_OPTIONS -jar /app.jar" ]


  


  The application displays the following text (video is not opened) :

  


  Error opening video file.

2023-08-02T13:30:58.448538297Z 
2023-08-02T13:30:58.448572597Z General configuration for OpenCV 4.7.0 =====================================
2023-08-02T13:30:58.448587327Z   Version control:               v4.7.0
2023-08-02T13:30:58.448590607Z 
2023-08-02T13:30:58.448593217Z   Platform:
2023-08-02T13:30:58.448596057Z     Timestamp:                   2023-03-27T23:13:34Z
2023-08-02T13:30:58.448598747Z     Host:                        Linux 5.4.0-1103-azure x86_64
2023-08-02T13:30:58.448601377Z     CMake:                       3.25.2
2023-08-02T13:30:58.448604277Z     CMake generator:             Unix Makefiles
2023-08-02T13:30:58.448606837Z     CMake build tool:            /usr/bin/make
2023-08-02T13:30:58.448609327Z     Configuration:               RELEASE
2023-08-02T13:30:58.448611867Z 
.......there is a lot of text......
2023-08-02T13:30:58.448772865Z 
2023-08-02T13:30:58.448775355Z   Video I/O:
2023-08-02T13:30:58.448777845Z     DC1394:                      NO
2023-08-02T13:30:58.448780535Z     FFMPEG:                      NO
2023-08-02T13:30:58.448783105Z       avcodec:                   NO
2023-08-02T13:30:58.448785725Z       avformat:                  NO
2023-08-02T13:30:58.448788295Z       avutil:                    NO
2023-08-02T13:30:58.448790755Z       swscale:                   NO
2023-08-02T13:30:58.448793295Z       avresample:                NO
2023-08-02T13:30:58.448795845Z     GStreamer:                   NO
2023-08-02T13:30:58.448798255Z     v4l/v4l2:                    YES (linux/videodev2.h)
2023-08-02T13:30:58.448800885Z 
2023-08-02T13:30:58.448803525Z   Parallel framework:            pthreads
2023-08-02T13:30:58.448806345Z 
............
2023-08-02T13:30:58.448859654Z   Java:                          export all functions
2023-08-02T13:30:58.448862024Z     ant:                         /usr/bin/ant (ver 1.10.5)
2023-08-02T13:30:58.448864504Z     JNI:                         /opt/hostedtoolcache/jdk/8.0.362/x64/include /opt/hostedtoolcache/jdk/8.0.362/x64/include/linux /opt/hostedtoolcache/jdk/8.0.362/x64/include
2023-08-02T13:30:58.448867224Z     Java wrappers:               YES
2023-08-02T13:30:58.448869804Z     Java tests:                  NO
2023-08-02T13:30:58.448872314Z 
2023-08-02T13:30:58.448874734Z   Install to:                    /usr/local


  


  Moreover, ffmpeg is installed on Ubuntu.

  


  How can i fix this ? I'm deathly tired(

  


  Thank you in advance for your assistance !

  


  First I tried installation following the official instructions.https://github.com/bytedeco/javacv#required-software

  


  Then the solution provided in https://stackoverflow.com/a/76750478/8087508,

  


  but the result is the same.