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• cv::cudacodec::VideoReader unable to Play rtsp stream

  22 février 2018, par Pawan

  System information

  • OpenCV => 3.3.0
  • Operating System / Platform => Ubuntu 16.04, x86_64
  • Compiler => gcc version 5.4.1 20160904
  • Cuda => 8.0
  • Nvidia card => GTX 1080 Ti
  • ffmpeg details
    • libavutil 55. 74.100 / 55. 74.100
    • libavcodec 57.103.100 / 57.103.100
    • libavformat 57. 77.100 / 57. 77.100
    • libavdevice 57. 7.101 / 57. 7.101
    • libavfilter 6.100.100 / 6.100.100
    • libswscale 4. 7.103 / 4. 7.103
    • libswresample 2. 8.100 / 2. 8.100

  Detailed description

  i am trying to play a rtsp stream using cudacodec::VideoReader

  Rtsp Stream Details ( from vlc )

  

  this stream plays fine in vlc and cv::VideoCapture but when i try to play it in cudacodec::VideoReader i get a error saying :

  OpenCV Error: Gpu API call (CUDA_ERROR_FILE_NOT_FOUND [Code = 301]) in CuvidVideoSource, file /home/deep/Development/libraries/opencv/opencv/modules/cudacodec/src/cuvid_video_source.cpp, line 66

  OpenCV Error: Assertion failed (init_MediaStream_FFMPEG()) in FFmpegVideoSource, file /home/deep/Development/libraries/opencv/opencv/modules/cudacodec/src/ffmpeg_video_source.cpp, line 101

  Steps to reproduce

  #include <iostream>
  
  #include "opencv2/opencv_modules.hpp"
  
  
  
  #if defined(HAVE_OPENCV_CUDACODEC)
  
  
  
  #include <opencv2></opencv2>core.hpp>
  
  #include <opencv2></opencv2>cudacodec.hpp>
  
  #include <opencv2></opencv2>highgui.hpp>
  
  
  
  int main(int argc, const char* argv[])
  
  {
  
      const std::string fname = "rtsp://admin:admin@192.168.1.13/media/video2";
  
  
  
      cv::namedWindow("GPU", cv::WINDOW_NORMAL);
  
  
  
      cv::cuda::GpuMat d_frame;
  
      cv::Ptr d_reader = cv::cudacodec::createVideoReader(fname);
  
  
  
      for (;;)
  
      {
  
  
  
          if (!d_reader->nextFrame(d_frame))
  
              break;
  
  
  
          cv::Mat frame;
  
          d_frame.download(frame);
  
          cv::imshow("GPU", frame);
  
  
  
          if (cv::waitKey(3) > 0)
  
              break;
  
      }
  
      return 0;
  
  }
  
  
  
  #else
  
  int main()
  
  {
  
      std::cout &lt;&lt; "OpenCV was built without CUDA Video decoding support\n" &lt;&lt; std::endl;
  
      return 0;
  
  }
  
  #endif
  
  </iostream>

  I tried debugging it using GDB and saw that in ffmpeg_video_source.cpp bool init_MediaStream_FFMPEG() directly returns without checking the if condition.

  GDB output

  cv::cudacodec::detail::FFmpegVideoSource::FFmpegVideoSource 
  
  (this=0x402a20 <_start>, fname=...) at /home/deep/Development/libraries/opencv/opencv/modules/cudacodec/src/ffmpeg_video_source.cpp:98
  
  98      cv::cudacodec::detail::FFmpegVideoSource::FFmpegVideoSource(const String& fname) :
  
  (gdb) n
  
  99          stream_(0)
  
  (gdb) n
  
  101         CV_Assert( init_MediaStream_FFMPEG() );
  
  (gdb) s
  
  (anonymous namespace)::init_MediaStream_FFMPEG () at /home/deep/Development/libraries/opencv/opencv/modules/cudacodec/src/ffmpeg_video_source.cpp:94
  
  94              return initialized;
  
  (gdb) display initialized
  
  4: initialized = false
  
  (gdb) s
  
  95          }

  UPDATE :

  I have solved the problem. solution link

• NODE.JS using audioconcat , configured ffmpeg but still have prob

  11 mai 2018, par Adnan Khan

  Want to concatenate two audio files. i used an npm package known as audioconcat but when i installed and configured the below code i am confronted with the following error

  Error: Error: Cannot find ffmpeg
  
      at E:\VoiceMan\registercheck\node_modules\fluent-ffmpeg\lib\processor.js:136:22
  
      at E:\VoiceMan\registercheck\node_modules\fluent-ffmpeg\lib\capabilities.js:123:9
  
      at E:\VoiceMan\registercheck\node_modules\async\dist\async.js:356:16
  
      at nextTask (E:\VoiceMan\registercheck\node_modules\async\dist\async.js:5057:29)
  
      at E:\VoiceMan\registercheck\node_modules\async\dist\async.js:5064:13
  
      at apply (E:\VoiceMan\registercheck\node_modules\async\dist\async.js:21:25)
  
      at E:\VoiceMan\registercheck\node_modules\async\dist\async.js:56:12
  
      at E:\VoiceMan\registercheck\node_modules\async\dist\async.js:840:16
  
      at E:\VoiceMan\registercheck\node_modules\fluent-ffmpeg\lib\capabilities.js:116:11
  
      at E:\VoiceMan\registercheck\node_modules\fluent-ffmpeg\lib\utils.js:223:16
  
  ffmpeg stderr: undefined

  Then I put my problem on stackoverflow. A kind developer suggest me to install ffmpeg also. which i successfully installed and set there path variables but now i am having another issue which tells me that no such file are directry found..i placed my audio files in the same folder of this module.
  here is the error

  working11
  
  working1123423423423
  
  ffmpeg process started: ffmpeg -i concat:audio/a(1).m4a|audio/a(2).m4a|audio/a(3).m4a -y -acodec copy all.m4a
  
  Error: Error: ffmpeg exited with code 1: concat:audio/a(1).m4a|audio/a(2).m4a|audio/a(3).m4a: No such file or directory
  
  
  
      at ChildProcess.<anonymous> (C:\Projects\audio\node_modules\fluent-ffmpeg\lib\processor.js:182:22)
  
      at emitTwo (events.js:126:13)
  
      at ChildProcess.emit (events.js:214:7)
  
      at Process.ChildProcess._handle.onexit (internal/child_process.js:198:12)
  
  ffmpeg stderr: ffmpeg version N-90173-gfa0c9d69d3 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 7.3.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libas
  
  s --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --ena
  
  ble-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack -
  
  -enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidst
  
  ab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libmfx --enable-amf --enable-cuda
  
   --enable-cuvid --enable-d3d11va --enable-nvenc --enable-dxva2 --enable-avisynth
  
    libavutil      56.  7.101 / 56.  7.101
  
    libavcodec     58. 13.100 / 58. 13.100
  
    libavformat    58. 10.100 / 58. 10.100
  
    libavdevice    58.  2.100 / 58.  2.100
  
    libavfilter     7. 12.100 /  7. 12.100
  
    libswscale      5.  0.101 /  5.  0.101
  
    libswresample   3.  0.101 /  3.  0.101
  
    libpostproc    55.  0.100 / 55.  0.100
  
  concat:audio/a(1).m4a|audio/a(2).m4a|audio/a(3).m4a: No such file or directory
  
  </anonymous>

  here is my code :

  var audioconcat = require('audioconcat')
  
  
  
  
  
  var songs = [
  
    'a(1).mp3',
  
    'a(2).mp3',
  
    'a(3).mp3'
  
  ]
  
   console.log("working11")
  
  audioconcat(songs)
  
  
  
    .concat('all.mp3') 
  
    .on('start', function (command) {
  
      console.log('ffmpeg process started:', command)
  
    })
  
    .on('error', function (err, stdout, stderr) {
  
      console.error('Error:', err)
  
      console.error('ffmpeg stderr:', stderr)
  
    })
  
    .on('end', function (output) {
  
      console.error('Audio created in:', output)
  
    })
  
     console.log("working1123423423423")

• Converting a video to a GIF

  21 novembre 2019, par Wolfiebae

  I am trying to make my app to accept videos from the phone’s library to be uploaded and converted into GIF format. My code is giving out this build error though :-

  error: <anonymous> is not abstract and does not override abstract method onReschedule(String,ErrorInfo) in UploadCallback
  
  </anonymous>

  and also this warning on my onActivityResult method :-

  Overriding method should call super.onActivityResult

  The code is as below : -

  public class Video2gif extends AppCompatActivity {
  
  
  
      private Button uploadBtn;
  
      private ProgressBar progressBar;
  
      private int SELECT_VIDEO = 2;
  
      private ImageView img1;
  
      private DownloadManager downloadManager;
  
      private Button download_btn;
  
      private String gifUrl;
  
  
  
      @Override
  
      protected void onCreate(Bundle savedInstanceState) {
  
          super.onCreate(savedInstanceState);
  
          setContentView(R.layout.activity_video2gif);
  
          MediaManager.init(this);
  
  
  
          progressBar = findViewById(R.id.progress_bar);
  
          MediaManager.init(this);
  
          img1 = findViewById(R.id.img1);
  
          uploadBtn = findViewById(R.id.uploadBtn);
  
  
  
          uploadBtn.setOnClickListener(new View.OnClickListener() {
  
              @Override
  
              public void onClick(View view) {
  
                  pickVideoFromGallery();
  
  
  
              }
  
              private void pickVideoFromGallery() {
  
                  Intent GalleryIntent = new Intent();
  
                  GalleryIntent.setType("video/*");
  
                  GalleryIntent.setAction(Intent.ACTION_GET_CONTENT);
  
                  startActivityForResult(Intent.createChooser(GalleryIntent,
  
                          "select video"), SELECT_VIDEO);
  
              }
  
          });
  
      }
  
      @Override
  
      protected void onActivityResult(int requestCode, int resultCode, final Intent data) {
  
  
  
          if (requestCode == SELECT_VIDEO && resultCode == RESULT_OK) {
  
              Uri selectedVideo = data.getData();
  
              MediaManager.get()
  
                      .upload(selectedVideo)
  
                      .unsigned("myid")
  
                      .option("resource_type", "video")
  
                      .callback(new UploadCallback(){
  
                          @Override
  
                          public void onStart(String requestId) {
  
                              progressBar.setVisibility(View.VISIBLE);
  
                              Toast.makeText(Video2gif.this,
  
                                      "Upload Started...", Toast.LENGTH_SHORT).show();
  
                          }
  
  
  
                          public void onProgress() {
  
                          }
  
  
  
                          public void onSuccess(String requestId, Map resultData) {
  
  
  
                              Toast.makeText(Video2gif.this, "Uploaded Succesfully",
  
                                      Toast.LENGTH_SHORT).show();
  
                              progressBar.setVisibility(View.GONE);
  
                              uploadBtn.setVisibility(View.INVISIBLE);
  
  
  
                              String publicId = resultData.get("public_id").toString();
  
  
  
                              gifUrl = MediaManager.get().url().resourceType("video")
  
                                      .transformation(new Transformation().videoSampling("25")
  
                                              .delay("200").height(200).effect("loop:10").crop("scale"))
  
                                      .resourceType("video").generate(publicId+".gif");
  
  
  
                              Glide.with(getApplicationContext()).asGif().load(gifUrl).into(img1);
  
                              download_btn.setVisibility(View.VISIBLE);
  
  
  
                          }
  
                          public void onError(String requestId, ErrorInfo error) {
  
                              Toast.makeText(Video2gif.this,
  
                                      "Upload Error", Toast.LENGTH_SHORT).show();
  
                              Log.v("ERROR!!", error.getDescription());
  
                          }
  
  
  
  
  
          });
  
      }
  
  }
  
  
  
  }

  I am also using Cloudinary to help process the video to GIF. Any help would be appreciated, many thanks !