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• stereo3d : Support view type for frame sequence type

  25 septembre 2017, par Vittorio Giovara

  stereo3d : Support view type for frame sequence type
  Implement detection in h264 and hevc and insertion in framepack filter.
  Signed-off-by : Vittorio Giovara <vittorio.giovara@gmail.com>
  

  • [DBH] doc/APIchanges
  • [DBH] libavcodec/h264_sei.c
  • [DBH] libavcodec/h264_sei.h
  • [DBH] libavcodec/h264_slice.c
  • [DBH] libavcodec/hevc_sei.c
  • [DBH] libavcodec/hevc_sei.h
  • [DBH] libavcodec/hevcdec.c
  • [DBH] libavfilter/vf_framepack.c
  • [DBH] libavutil/stereo3d.h
  • [DBH] libavutil/version.h

• Streaming client over TCP and RTSP through Wi-Fi or LAN in Android

  6 janvier 2015, par Gowtham

  I am struggling to develop streaming client for DVR camera’s, I tried with VLC Media player through RTSP protocol I got the solution (used Wi-Fi standard model like, Netgear etc.,), but the same code is not supporting for other Wi-Fi Modem’s, now am working with FFMPEG framework to implement the streaming client in android using JNI API. Not getting any proper idea to implement JNI api

  Network Camera working with IP Cam Viewer App

  code below,

  /*****************************************************/
  
  /* functional call */
  
  /*****************************************************/
  
  
  
  jboolean Java_FFmpeg_allocateBuffer( JNIEnv* env, jobject thiz )
  
  {
  
  
  
      // Allocate an AVFrame structure
  
      pFrameRGB=avcodec_alloc_frame();
  
      if(pFrameRGB==NULL)
  
          return 0;
  
  sprintf(debugMsg, "%d %d", screenWidth, screenHeight);
  
  INFO(debugMsg);
  
      // Determine required buffer size and allocate buffer
  
      numBytes=avpicture_get_size(dstFmt, screenWidth, screenHeight);
  
  /*
  
      numBytes=avpicture_get_size(dstFmt, pCodecCtx->width,
  
                    pCodecCtx->height);
  
  */
  
      buffer=(uint8_t *)av_malloc(numBytes * sizeof(uint8_t));
  
  
  
      // Assign appropriate parts of buffer to image planes in pFrameRGB
  
      // Note that pFrameRGB is an AVFrame, but AVFrame is a superset
  
      // of AVPicture
  
      avpicture_fill((AVPicture *)pFrameRGB, buffer, dstFmt, screenWidth, screenHeight);
  
  
  
      return 1;
  
  }
  
  
  
  
  
  /* for each decoded frame */
  
  jbyteArray Java_FFmpeg_getNextDecodedFrame( JNIEnv* env, jobject thiz )
  
  {
  
  
  
  
  
  av_free_packet(&packet);
  
  
  
  while(av_read_frame(pFormatCtx, &packet)>=0) {
  
  
  
      if(packet.stream_index==videoStream) {
  
  
  
          avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet);
  
  
  
          if(frameFinished) {     
  
  
  
          img_convert_ctx = sws_getContext(pCodecCtx->width, pCodecCtx->height, pCodecCtx->pix_fmt, screenWidth, screenHeight, dstFmt, SWS_BICUBIC, NULL, NULL, NULL);
  
  
  
  /*
  
  img_convert_ctx = sws_getContext(pCodecCtx->width, pCodecCtx->height, pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height, dstFmt, SWS_BICUBIC, NULL, NULL, NULL);
  
  */
  
  
  
          sws_scale(img_convert_ctx, (const uint8_t* const*)pFrame->data, pFrame->linesize,
  
       0, pCodecCtx->height, pFrameRGB->data, pFrameRGB->linesize);
  
  
  
  ++frameCount;
  
  
  
          /* uint8_t == unsigned 8 bits == jboolean */
  
          jbyteArray nativePixels = (*env)->NewByteArray(env, numBytes);
  
          (*env)->SetByteArrayRegion(env, nativePixels, 0, numBytes, buffer);
  
          return nativePixels;
  
          }
  
  
  
      }
  
  
  
      av_free_packet(&packet);
  
  }
  
  
  
  return NULL;
  
  }
  
  
  
  /*****************************************************/
  
  /* / functional call */
  
  /*****************************************************/
  
  
  
  
  
  jstring
  
  Java_FFmpeg_play( JNIEnv* env, jobject thiz, jstring jfilePath )
  
  {
  
      INFO("--- Play");
  
  char* filePath = (char *)(*env)->GetStringUTFChars(env, jfilePath, NULL);
  
  RE(filePath);
  
  
  
  /*****************************************************/
  
  
  
    AVFormatContext *pFormatCtx;
  
    int             i, videoStream;
  
    AVCodecContext  *pCodecCtx;
  
    AVCodec         *pCodec;
  
    AVFrame         *pFrame; 
  
    AVPacket        packet;
  
    int             frameFinished;
  
    float           aspect_ratio;
  
    struct SwsContext *img_convert_ctx;
  
  
  
  INFO(filePath);
  
  
  
  /* FFmpeg */
  
  
  
    av_register_all();
  
  
  
    if(av_open_input_file(&pFormatCtx, filePath, NULL, 0, NULL)!=0)
  
      RE("failed av_open_input_file ");
  
  
  
    if(av_find_stream_info(pFormatCtx)<0)
  
          RE("failed av_find_stream_info");
  
  
  
    videoStream=-1;
  
    for(i=0; inb_streams; i++)
  
      if(pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
  
        videoStream=i;
  
        break;
  
      }
  
    if(videoStream==-1)
  
          RE("failed videostream == -1");
  
  
  
    pCodecCtx=pFormatCtx->streams[videoStream]->codec;
  
  
  
    pCodec=avcodec_find_decoder(pCodecCtx->codec_id);
  
    if(pCodec==NULL) {
  
      RE("Unsupported codec!");
  
    }
  
  
  
    if(avcodec_open(pCodecCtx, pCodec)<0)
  
      RE("failed codec_open");
  
  
  
    pFrame=avcodec_alloc_frame();
  
  
  
  /* /FFmpeg */
  
  
  
  INFO("codec name:");
  
  INFO(pCodec->name);
  
  INFO("Getting into stream decode:");
  
  
  
  /* video stream */
  
  
  
    i=0;
  
    while(av_read_frame(pFormatCtx, &packet)>=0) {
  
  
  
      if(packet.stream_index==videoStream) {
  
        avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet);
  
        if(frameFinished) {
  
  ++i;
  
  INFO("frame finished");
  
  
  
      AVPicture pict;
  
  /*
  
      img_convert_ctx = sws_getContext(pCodecCtx->width, pCodecCtx->height,
  
   pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height,
  
   PIX_FMT_YUV420P, SWS_BICUBIC, NULL, NULL, NULL);
  
  
  
      sws_scale(img_convert_ctx, (const uint8_t* const*)pFrame->data, pFrame->linesize,
  
   0, pCodecCtx->height, pict.data, pict.linesize);
  
  */
  
        }
  
      }
  
      av_free_packet(&packet);
  
    }
  
  
  
  /* /video stream */
  
  
  
    av_free(pFrame);
  
  
  
    avcodec_close(pCodecCtx);
  
  
  
    av_close_input_file(pFormatCtx);
  
  
  
    RE("end of main");
  
  }

  I can’t able to get the frames from Network camera

  And give some idea to implement the live stream client for DVR camera in Android

• Stream camera/video from python to client using ffmpeg

  31 janvier 2018, par Rahul

  So I’m making an application where I have connected my camera with python code through opencv.

  Now I can process each frame inside my python code but I want to stream this live feed to users.

  I found that FFmpeg can be used to achieve this but I’m wondering how.
  Also please do suggest any solution to achieve this with any other library.

  The only condition is that I should be able to stream from my python code may be via a subprocess.

  thanks in advance :)