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• ffmpeg - "Incompatible pixel format 'rgb24' for codec 'gif', auto-selecting format 'rgb8'"

  8 février 2017, par fordprefect

  I’m trying to convert a .webm to .gif at a pretty good quality, so I decided to have a go at ffmpeg (very new to this). I followed some instructions and did some research and after setting everything up figured out what I wanted in the command line :

  ffmpeg -i input.webm -pix_fmt rgb24 -vf scale=-1:720 output.gif

  Whenever I start the conversion it gives me a warning (as seen in the title), and gives me a somewhat low quality gif by using ’rgb8’. I’ve googled around but can’t seem to find an answer, not that my skill level can understand at least.

  Help would be much appreciated ! Thanks :)

• Live555 : X264 Stream Live source based on "testOnDemandRTSPServer"

  26 octobre 2017, par user2660369

  I am trying to create a rtsp Server that streams the OpenGL output of my program. I had a look at How to write a Live555 FramedSource to allow me to stream H.264 live, but I need the stream to be unicast. So I had a look at testOnDemandRTSPServer. Using the same Code fails. To my understanding I need to provide memory in which I store my h264 frames so the OnDemandServer can read them on Demand.

  H264VideoStreamServerMediaSubsession.cpp

  H264VideoStreamServerMediaSubsession*
  
  H264VideoStreamServerMediaSubsession::createNew(UsageEnvironment& env,
  
                            Boolean reuseFirstSource) {
  
    return new H264VideoStreamServerMediaSubsession(env, reuseFirstSource);
  
  }
  
  
  
  H264VideoStreamServerMediaSubsession::H264VideoStreamServerMediaSubsession(UsageEnvironment& env, Boolean reuseFirstSource)
  
    : OnDemandServerMediaSubsession(env, reuseFirstSource), fAuxSDPLine(NULL), fDoneFlag(0), fDummyRTPSink(NULL) {
  
  }
  
  
  
  H264VideoStreamServerMediaSubsession::~H264VideoStreamServerMediaSubsession() {
  
    delete[] fAuxSDPLine;
  
  }
  
  
  
  static void afterPlayingDummy(void* clientData) {
  
    H264VideoStreamServerMediaSubsession* subsess = (H264VideoStreamServerMediaSubsession*)clientData;
  
    subsess->afterPlayingDummy1();
  
  }
  
  
  
  void H264VideoStreamServerMediaSubsession::afterPlayingDummy1() {
  
    // Unschedule any pending 'checking' task:
  
    envir().taskScheduler().unscheduleDelayedTask(nextTask());
  
    // Signal the event loop that we're done:
  
    setDoneFlag();
  
  }
  
  
  
  static void checkForAuxSDPLine(void* clientData) {
  
    H264VideoStreamServerMediaSubsession* subsess = (H264VideoStreamServerMediaSubsession*)clientData;
  
    subsess->checkForAuxSDPLine1();
  
  }
  
  
  
  void H264VideoStreamServerMediaSubsession::checkForAuxSDPLine1() {
  
    char const* dasl;
  
  
  
    if (fAuxSDPLine != NULL) {
  
      // Signal the event loop that we're done:
  
      setDoneFlag();
  
    } else if (fDummyRTPSink != NULL && (dasl = fDummyRTPSink->auxSDPLine()) != NULL) {
  
      fAuxSDPLine = strDup(dasl);
  
      fDummyRTPSink = NULL;
  
  
  
      // Signal the event loop that we're done:
  
      setDoneFlag();
  
    } else {
  
      // try again after a brief delay:
  
      int uSecsToDelay = 100000; // 100 ms
  
      nextTask() = envir().taskScheduler().scheduleDelayedTask(uSecsToDelay,
  
                    (TaskFunc*)checkForAuxSDPLine, this);
  
    }
  
  }
  
  
  
  char const* H264VideoStreamServerMediaSubsession::getAuxSDPLine(RTPSink* rtpSink, FramedSource* inputSource) {
  
    if (fAuxSDPLine != NULL) return fAuxSDPLine; // it's already been set up (for a previous client)
  
  
  
    if (fDummyRTPSink == NULL) { // we're not already setting it up for another, concurrent stream
  
      // Note: For H264 video files, the 'config' information ("profile-level-id" and "sprop-parameter-sets") isn't known
  
      // until we start reading the file.  This means that "rtpSink"s "auxSDPLine()" will be NULL initially,
  
      // and we need to start reading data from our file until this changes.
  
      fDummyRTPSink = rtpSink;
  
  
  
      // Start reading the file:
  
      fDummyRTPSink->startPlaying(*inputSource, afterPlayingDummy, this);
  
  
  
      // Check whether the sink's 'auxSDPLine()' is ready:
  
      checkForAuxSDPLine(this);
  
    }
  
  
  
    envir().taskScheduler().doEventLoop(&fDoneFlag);
  
  
  
    return fAuxSDPLine;
  
  }
  
  
  
  FramedSource* H264VideoStreamServerMediaSubsession::createNewStreamSource(unsigned /*clientSessionId*/, unsigned& estBitrate) {
  
    estBitrate = 500; // kb
  
    megamol::remotecontrol::View3D_MRC *parent = (megamol::remotecontrol::View3D_MRC*)this->parent;
  
    return H264VideoStreamFramer::createNew(envir(), parent->h264FramedSource);
  
  }
  
  
  
  RTPSink* H264VideoStreamServerMediaSubsession::createNewRTPSink(Groupsock* rtpGroupsock, unsigned char rtpPayloadTypeIfDynamic, FramedSource* /*inputSource*/) {
  
    return H264VideoRTPSink::createNew(envir(), rtpGroupsock, rtpPayloadTypeIfDynamic);
  
  }

  FramedSource.cpp

  H264FramedSource* H264FramedSource::createNew(UsageEnvironment& env,
  
                                            unsigned preferredFrameSize,
  
                                            unsigned playTimePerFrame)
  
  {
  
      return new H264FramedSource(env, preferredFrameSize, playTimePerFrame);
  
  }
  
  
  
  H264FramedSource::H264FramedSource(UsageEnvironment& env,
  
                                 unsigned preferredFrameSize,
  
                                 unsigned playTimePerFrame)
  
      : FramedSource(env),
  
      fPreferredFrameSize(fMaxSize),
  
      fPlayTimePerFrame(playTimePerFrame),
  
      fLastPlayTime(0),
  
      fCurIndex(0)
  
  {
  
  
  
      x264_param_default_preset(&param, "veryfast", "zerolatency");
  
      param.i_threads = 1;
  
      param.i_width = 1024;
  
      param.i_height = 768;
  
      param.i_fps_num = 30;
  
      param.i_fps_den = 1;
  
      // Intra refres:
  
      param.i_keyint_max = 60;
  
      param.b_intra_refresh = 1;
  
      //Rate control:
  
      param.rc.i_rc_method = X264_RC_CRF;
  
      param.rc.f_rf_constant = 25;
  
      param.rc.f_rf_constant_max = 35;
  
      param.i_sps_id = 7;
  
      //For streaming:
  
      param.b_repeat_headers = 1;
  
      param.b_annexb = 1;
  
      x264_param_apply_profile(&param, "baseline");
  
  
  
      param.i_log_level = X264_LOG_ERROR;
  
  
  
      encoder = x264_encoder_open(&param);
  
      pic_in.i_type            = X264_TYPE_AUTO;
  
      pic_in.i_qpplus1         = 0;
  
      pic_in.img.i_csp         = X264_CSP_I420;
  
      pic_in.img.i_plane       = 3;
  
  
  
  
  
      x264_picture_alloc(&pic_in, X264_CSP_I420, 1024, 768);
  
  
  
      convertCtx = sws_getContext(1024, 768, PIX_FMT_RGBA, 1024, 768, PIX_FMT_YUV420P, SWS_FAST_BILINEAR, NULL, NULL, NULL);
  
      eventTriggerId = envir().taskScheduler().createEventTrigger(deliverFrame0);
  
  }
  
  
  
  H264FramedSource::~H264FramedSource()
  
  {
  
      envir().taskScheduler().deleteEventTrigger(eventTriggerId);
  
      eventTriggerId = 0;
  
  }
  
  
  
  void H264FramedSource::AddToBuffer(uint8_t* buf, int surfaceSizeInBytes)
  
  {
  
      uint8_t* surfaceData = (new uint8_t[surfaceSizeInBytes]);
  
  
  
      memcpy(surfaceData, buf, surfaceSizeInBytes);
  
  
  
      int srcstride = 1024*4;
  
      sws_scale(convertCtx, &surfaceData, &srcstride,0, 768, pic_in.img.plane, pic_in.img.i_stride);
  
      x264_nal_t* nals = NULL;
  
      int i_nals = 0;
  
      int frame_size = -1;
  
  
  
  
  
      frame_size = x264_encoder_encode(encoder, &nals, &i_nals, &pic_in, &pic_out);
  
  
  
      static bool finished = false;
  
  
  
      if (frame_size >= 0)
  
      {
  
      static bool alreadydone = false;
  
      if(!alreadydone)
  
      {
  
  
  
          x264_encoder_headers(encoder, &nals, &i_nals);
  
          alreadydone = true;
  
      }
  
      for(int i = 0; i < i_nals; ++i)
  
      {
  
          m_queue.push(nals[i]);
  
      }
  
      }
  
      delete [] surfaceData;
  
      surfaceData = nullptr;
  
  
  
      envir().taskScheduler().triggerEvent(eventTriggerId, this);
  
  }
  
  
  
  void H264FramedSource::doGetNextFrame()
  
  {
  
      deliverFrame();
  
  }
  
  
  
  void H264FramedSource::deliverFrame0(void* clientData)
  
  {
  
      ((H264FramedSource*)clientData)->deliverFrame();
  
  }
  
  
  
  void H264FramedSource::deliverFrame()
  
  {
  
      x264_nal_t nalToDeliver;
  
  
  
      if (fPlayTimePerFrame > 0 && fPreferredFrameSize > 0) {
  
      if (fPresentationTime.tv_sec == 0 && fPresentationTime.tv_usec == 0) {
  
          // This is the first frame, so use the current time:
  
          gettimeofday(&fPresentationTime, NULL);
  
      } else {
  
          // Increment by the play time of the previous data:
  
          unsigned uSeconds   = fPresentationTime.tv_usec + fLastPlayTime;
  
          fPresentationTime.tv_sec += uSeconds/1000000;
  
          fPresentationTime.tv_usec = uSeconds%1000000;
  
      }
  
  
  
      // Remember the play time of this data:
  
      fLastPlayTime = (fPlayTimePerFrame*fFrameSize)/fPreferredFrameSize;
  
      fDurationInMicroseconds = fLastPlayTime;
  
      } else {
  
      // We don't know a specific play time duration for this data,
  
      // so just record the current time as being the 'presentation time':
  
      gettimeofday(&fPresentationTime, NULL);
  
      }
  
  
  
      if(!m_queue.empty())
  
      {
  
      m_queue.wait_and_pop(nalToDeliver);
  
  
  
      uint8_t* newFrameDataStart = (uint8_t*)0xD15EA5E;
  
  
  
      newFrameDataStart = (uint8_t*)(nalToDeliver.p_payload);
  
      unsigned newFrameSize = nalToDeliver.i_payload;
  
  
  
      // Deliver the data here:
  
      if (newFrameSize > fMaxSize) {
  
          fFrameSize = fMaxSize;
  
          fNumTruncatedBytes = newFrameSize - fMaxSize;
  
      }
  
      else {
  
          fFrameSize = newFrameSize;
  
      }
  
  
  
      memcpy(fTo, nalToDeliver.p_payload, nalToDeliver.i_payload);
  
  
  
      FramedSource::afterGetting(this);
  
      }
  
  }

  Relevant part of the RTSP-Server Therad

    RTSPServer* rtspServer = RTSPServer::createNew(*(parent->env), 8554, NULL);
  
    if (rtspServer == NULL) {
  
      *(parent->env) << "Failed to create RTSP server: " << (parent->env)->getResultMsg() << "\n";
  
      exit(1);
  
    }
  
    char const* streamName = "Stream";
  
    parent->h264FramedSource = H264FramedSource::createNew(*(parent->env), 0, 0);
  
    H264VideoStreamServerMediaSubsession *h264VideoStreamServerMediaSubsession = H264VideoStreamServerMediaSubsession::createNew(*(parent->env), true);
  
    h264VideoStreamServerMediaSubsession->parent = parent;
  
    sms->addSubsession(h264VideoStreamServerMediaSubsession);
  
    rtspServer->addServerMediaSession(sms);
  
  
  
    parent->env->taskScheduler().doEventLoop(); // does not return

  Once a connection exists the render loop calls

  h264FramedSource->AddToBuffer(videoData, 1024*768*4);

• lavf/mp3dec : avoid printing useless message in default log level

  8 mars 2016, par Moritz Barsnick

  lavf/mp3dec : avoid printing useless message in default log level
  "Skipping 0 bytes of junk" is useless to the user, and essentially
  
  indicates a NOP. At 0 bytes, this message is now pushed back to
  
  the verbose log level.
  Signed-off-by : Moritz Barsnick <barsnick@gmx.net>
  

  • [DH] libavformat/mp3dec.c