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• What parameters are required to use x264 via ffmpeg ?

  15 février 2012, par nightWatcher

  i have an AVI file, i have decoded it into Raw form first, now i want to encode it in .h264 format. I am using libavcodec.dll and libavformat.dll.
  The point is when i try to open the codec from avcodec_open(AVCodecContext,AVCodec)
  It doesnot open. Am i missing some parameters that i need to specify for execution of this method for the lib x264 ?
  Any help will be deeply appreciated.
  Thanks

• libavcodec ffmpeg huge memory leak

  12 décembre 2016, par aleksandar kamenjasevic

  i have trouble with ffmpeg and memory leak.
  I have class for decoding video, and i make instance of that class for every video file that i have in playlist.
  When i broadcasting video file i don’t have memory leak, only i have when create instance of ffmpeg class. I was play video file in loop for 2 days without increasing memory.

  This is my decoding code :

              if(av_read_frame(pFormatCtx,&packet)>=0){
  
              if(packet.stream_index==videoStream){
  
                  if(first_dts_video==AV_NOPTS_VALUE){
  
                      first_dts_video=packet.pts;
  
                  }
  
                  avcodec_decode_video2(pCodecCtx,pFrameOrg,&frameFinished,&packet);
  
                  if(frameFinished){
  
                      if(first){
  
                          first=false;
  
                          buffer=(uint8_t*)malloc(iNumBytes*sizeof(uint8_t));
  
                          avpicture_fill((AVPicture*)pFrameRGB,buffer,PIX_FMT_RGB24,oWidth,oHeight);
  
                          sws_scale(pSwsCtx,(uint8_t const * const *)pFrameOrg->data,pFrameOrg->linesize,0,pCodecCtx->height,pFrameRGB->data,pFrameRGB->linesize);
  
                          m_file->fillImage(pFrameRGB->data[0],pFrameRGB->linesize[0],iNumBytes);
  
                          m_file->ready=true;
  
                          m_file->wait.notify_all();
  
                          av_frame_free(&pFrameRGB);
  
                          if(buffer!=NULL)
  
                              free(buffer);
  
                      }
  
                      buf=(videoBuff*)malloc(sizeof(videoBuff));
  
                      if(buf==NULL){
  
                          threadRunning=false;
  
                          continue;
  
                      }
  
                      buf->buffer=malloc(bytes*sizeof(uint8_t));
  
                      if(buf->buffer==NULL){
  
                          threadRunning=false;
  
                          continue;
  
                      }
  
                      //qDebug()<isAvi()&&pCodecCtx->pix_fmt==PIX_FMT_YUV420P){                            
  
                          av_buffersrc_add_frame(filter_src_ctx,pFrameOrg);//filter
  
  
  
                          while (1) {//filter
  
                              int ret = av_buffersink_get_frame(filter_sink_ctx, filter_frame);
  
                              if (ret == AVERROR(EAGAIN)){
  
                                  //                                qDebug()<<"EAGAIN";
  
                                  break;
  
                              }else if( ret == AVERROR_EOF){
  
                                  //                                qDebug()<<"AVERROR_EOF";
  
                                  break;
  
                              }
  
                              if (ret < 0){
  
                                  //                                qDebug()<data,filter_frame->linesize,0,pCodecCtx->height,pFrameUYVY422->data,pFrameUYVY422->linesize);//stara verzija je koristila pFrameOrg
  
                              av_frame_unref(filter_frame);
  
                          }
  
  
  
                          av_frame_unref(filter_frame);//ocisti frame od filtera
  
                      }else{
  
                          sws_scale(pSwsCtxUYVY422,(uint8_t const * const*)pFrameOrg->data,pFrameOrg->linesize,0,pCodecCtx->height,pFrameUYVY422->data,pFrameUYVY422->linesize);
  
                      }
  
                      buf->lineSize=pFrameUYVY422->linesize[0];
  
                      buf->bufSize=bytes;
  
                      memcpy(buf->buffer,pFrameUYVY422->data[0],bytes);
  
                      frameCount++;
  
                      m_file->putVideoBuf(buf);
  
                      av_packet_unref(&packet);
  
                  }else{
  
                      av_packet_unref(&packet);
  
                      qDebug()<<"OCE OCE";
  
                      if(syncVideo){
  
                          frameCount++;
  
                          m_file->putVideoBuf(NULL);
  
                      }
  
                  }
  
              }else if(packet.stream_index==audioStream){
  
                  if(firstAudio){
  
                      firstAudio=false;
  
                  }
  
  
  
                  m1.lock();
  
                  audioPackets.append(packet);
  
                  m1.unlock();
  
              }else{
  
                  av_packet_unref(&packet);
  
              }
  
          }

  this is my destructor :

  MYAVClass::~MYAVClass(){
  
  m1.unlock();
  
  this->m1.lock();
  
  threadRunning=false;
  
  if(t1!=NULL){
  
      this->m1.unlock();
  
      if(this->t1->joinable())
  
          this->t1->join();
  
      delete t1;
  
      flush();
  
  }
  
  if(pFrameOrg!=NULL)
  
      av_frame_free(&pFrameOrg);
  
  if(pFrameRGB!=NULL)
  
      av_frame_free(&pFrameRGB);
  
  if(pFrameAudio!=NULL)
  
      av_frame_free(&pFrameAudio);
  
  if(pFrameUYVY422!=NULL)
  
      av_frame_free(&pFrameUYVY422);
  
  if(filter_frame!=NULL){
  
      av_frame_free(&filter_frame);
  
      filter_frame=NULL;
  
  }
  
  if(filter_audio_frame!=NULL){
  
      av_frame_free(&filter_audio_frame);
  
      filter_audio_frame=NULL;
  
  }
  
  if(filter_graph!=NULL){
  
      avfilter_graph_free(&filter_graph);
  
      filter_graph=NULL;
  
  }
  
  if(filter_a_graph!=NULL){
  
      avfilter_graph_free(&filter_a_graph);
  
      filter_a_graph=NULL;
  
  }
  
  
  
  if(pCodecCtx!=NULL){
  
      avcodec_close(pCodecCtx);
  
      avcodec_free_context(&pCodecCtx);
  
  }
  
  if(aCodecCtx!=NULL){
  
      avcodec_close(aCodecCtx);
  
      avcodec_free_context(&aCodecCtx);
  
  }
  
  if(pFormatCtx!=NULL)
  
      avformat_close_input(&pFormatCtx);
  
  if(audioBuffer!=NULL)
  
      free(audioBuffer);
  
  if(pSwsCtx!=NULL)
  
      sws_freeContext(pSwsCtx);
  
  if(pSwsCtxUYVY422!=NULL)
  
      sws_freeContext(pSwsCtxUYVY422);
  
  if(sws_ctx_audio!=NULL)
  
      swr_free((SwrContext**)&sws_ctx_audio);
  
  if(audioBuffRes!=NULL)
  
      free(audioBuffRes);
  
  if(audioTmpBuf!=NULL)
  
      free(audioTmpBuf);
  
  if(buffer_UYVY422!=NULL){
  
      free(buffer_UYVY422);
  
  }
  
  }

  Also i notice that i have massive memory leak when i use functions

  if(avcodec_open2(pCodecCtx,pCodec,NULL)!=0){
  
      QMessageBox::critical(NULL,"OPEN CODEC","SISTEMSKA GRESKA");
  
      pFile->setHaveFileInfo(false);
  
      return;
  
  }

  and after i decode first video frame.

  When i create 40 instances of this class, and then i delete all of it, 600 MB left in memory.

  I would appreciate your help. Thank you very much.

  //EDIT
  this is place where i put my VideoBuff*

  void VideoFile::putVideoBuf(videoBuff *buf){
  
  if(buf==NULL&&!videoPackets.isEmpty()){
  
      m1.lock();
  
      qDebug()<<"NULL";
  
      videoBuff *tmpBuf=new videoBuff;
  
      tmpBuf->bufSize=videoPackets.last()->bufSize;
  
      tmpBuf->lineSize=videoPackets.last()->lineSize;
  
      tmpBuf->buffer=malloc(tmpBuf->bufSize);
  
      memcpy(tmpBuf->buffer,videoPackets.last()->buffer,tmpBuf->bufSize);
  
      videoPackets.append(tmpBuf);
  
      m1.unlock();
  
  }else if(buf!=NULL){
  
      this->m1.lock();
  
      videoPackets.append(buf);
  
      this->m1.unlock();
  
  }else{
  
      qDebug()<<"-.-";
  
  }}

  This is function for pulling my VideoBuf*

  videoBuff *VideoFile::getNextVideoBuf(){
  
  if(this->getTvReady()){
  
      if(videoPackets.size()>0&&audioPackets.size()>0){
  
          this->m1.lock();
  
          videoBuff *tmp=NULL;
  
          if(!videoPackets.isEmpty())
  
              tmp=videoPackets.first();
  
          if(tmp==NULL){
  
              this->m1.unlock();
  
              return NULL;
  
          }
  
          if(!videoPackets.isEmpty())
  
              videoPackets.removeFirst();
  
          if(videoTaken>=*numberOfframes)
  
              videoTaken=0;
  
          videoTaken++;
  
          qDebug()<m1.unlock();
  
          return tmp;
  
      }else{
  
          this->removeLastVideoFrames(videoPackets.size());
  
          this->removeLastAudioFrames(audioPackets.size());
  
          currentLive=NULL;
  
          emit finish();
  
          return NULL;
  
      }
  
  }else{
  
      return NULL;
  
  }}

  This is place where i pull my VideoBuf*

  bool DecklinkDevice::ScheduleNextVideoFrame(bool preroling){
  
  iDecklinkOutput->CreateVideoFrame(currentOutput->getWidth(),currentOutput->getHeight(),currentOutput->getWidth()*bytesPerPix,videoFormat,bmdFrameFlagDefault,&m_videoFrame);
  
  if(preroling==false){
  
      if(running==false){
  
          this->mutex.unlock();
  
          return false;
  
      }
  
  }
  
  if(currentOutput==NULL){
  
      this->mutex.unlock();
  
      return false;
  
  }
  
  timeCode=new MyTimeCode;
  
  timeCode->setFps(currentOutput->getFramesPerSec());
  
  void *buf;
  
  m_videoFrame->GetBytes(&buf);
  
  bool isLogo=false;
  
  bool isTimeLogo=false;
  
  VideoFile *f=nextVideoBuf->getVideoFile();
  
  if(f!=NULL){
  
      videoBuff *n_buf=nextVideoBuf->getVideoFile()->getNextVideoBuf();
  
      isLogo=f->getLogo();
  
      isTimeLogo=f->getTimeLogo();
  
      timeCode->setVideoFile(f);
  
      if(n_buf!=NULL){
  
          m_videoFrame->SetTimecode(timeCodeFormat,timeCode);
  
          if(lastVideoBuff!=NULL)
  
              free(lastVideoBuff);
  
          lastVideoBuff=malloc(n_buf->bufSize);
  
          memcpy(buf,n_buf->buffer,n_buf->bufSize);
  
          memcpy(lastVideoBuff,buf,n_buf->bufSize);
  
          lastVideoBuffSize=n_buf->bufSize;
  
          free(n_buf->buffer);
  
          free(n_buf);
  
      }else{
  
          void *buf;
  
          m_videoFrame->GetBytes(&buf);
  
          timeCode->setLast();
  
          memcpy(buf,lastVideoBuff,lastVideoBuffSize);
  
      }
  
  }else{
  
      void *buf;
  
      m_videoFrame->GetBytes(&buf);
  
      if(lastVideoBuff==NULL){
  
          lastVideoBuff=malloc(m_videoFrame->GetWidth()*m_videoFrame->GetHeight()*bytesPerPix);
  
          memset(lastVideoBuff,100,m_videoFrame->GetWidth()*m_videoFrame->GetHeight()*bytesPerPix);
  
      }
  
      memcpy(buf,lastVideoBuff,m_videoFrame->GetWidth()*m_videoFrame->GetHeight()*bytesPerPix);
  
  }
  
  if(alphaSupport()){
  
      int rowId=nextAudioBuf->getSettings()->getLogoPos().y();
  
      uchar *ptr=(uchar*)buf;
  
      if(isLogo){
  
          uchar *pptr=logo->bits();
  
          for(int i=0;ibyteCount();i=i+4){
  
  
  
              if(i%logo->bytesPerLine()==0){
  
                  rowId++;
  
  
  
              }
  
              if(pptr[i+3]!=255)
  
                  continue;
  
              int offset=(i%logo->bytesPerLine()+nextVideoBs-Ÿ>getSettings()->getLogoPos().x()*bytesPerPix);
  
              ptr[offset+m_videoFrame->GetRowBytes()*rowId]=pptr[i+3];
  
              ptr[offset+1+m_videoFrame->GetRowBytes()*rowId]=pptr[i+2];
  
              ptr[offset+2+m_videoFrame->GetRowBytes()*rowId]=pptr[i+1];
  
              ptr[offset+3+m_videoFrame->GetRowBytes()*rowId]=pptr[i];
  
          }
  
      }
  
      if(isTimeLogo){
  
          QImage im(m_videoFrame->GetWidth()/5,100,QImage::Format_ARGB32);
  
          QPainter p(&im);
  
          p.setRenderHints(QPainter::RenderHints(QPainter::SmoothPixmapTransform|QPainter::TextAntialiasing|QPainter::HighQualityAntialiasing|QPainter::TextAntialiasing|QPainter::Antialiasing));
  
          p.fillRect(im.rect(),QColor(0,0,0));
  
          QFont f;
  
          f.setFamily(f.defaultFamily());
  
          f.setPointSize(25);
  
          p.setFont(f);
  
          QPen pen;
  
          pen.setColor(Qt::white);
  
          p.setPen(pen);
  
          p.setBrush(QBrush(QColor(255,255,255)));
  
          p.drawText(im.rect(),QTime::currentTime().toString("hh:mm"));
  
          for(int i=0;igetSettings()->getLogoPos().x()*bytesPerPix);
  
              ptr[offset+m_videoFrame->GetRowBytes()*rowId]=im.bits()[i+3];
  
              ptr[offset+1+m_videoFrame->GetRowBytes()*rowId]=im.bits()[i+2];
  
              ptr[offset+2+m_videoFrame->GetRowBytes()*rowId]=im.bits()[i+1];
  
              ptr[offset+3+m_videoFrame->GetRowBytes()*rowId]=im.bits()[i+0];
  
  
  
          }
  
      }
  
  }
  
  iDecklinkOutput->ScheduleVideoFrame(m_videoFrame,numberOfVideoFrames*currentOutput->getFrameDuration(),currentOutput->getFrameDuration(),currentOutput->getTimeScale());
  
  numberOfVideoFrames++;
  
  timeCode->update();
  
  return true;}

  Here ,in this callback function, I free video bits and timecode object ;

  HRESULT DLPlaybackDelegate::ScheduledFrameCompleted(IDeckLinkVideoFrame *completedFrame, BMDOutputFrameCompletionResult result){
  
  IDeckLinkTimecode *t=NULL;
  
  completedFrame->GetTimecode(bmdTimecodeVITC,&t);
  
  if(t!=NULL){
  
      MyTimeCode *mt=(MyTimeCode*)t;
  
      VideoFile *f=NULL;
  
      f=mt->getVideoFile();
  
      if(f!=NULL){
  
          f->frameEmited();
  
      }
  
      t->Release();
  
  }
  
  
  
  completedFrame->Release();
  
  completedFrame=NULL;
  
  static uint64_t frames=0;
  
  m_device->ScheduleNextVideoFrame(false);
  
  return S_OK;}

  //edit 12.12.2016
  Hello, after i download source code from ffmpeg site, and compile last version of a ffmpeg, i lost memory leak. Now everything works very fine.

  Also i notice in libsmbclient.c ,ffmpeg source file, that smbc_set_context(libsmbc->ctx) ; is not used in functions that reading from network shares. Without this, program will crash if you try to read multiple files from a multiple threads. Is this a bug ?

• H264 Encoders other than ffmpeg x264

  5 septembre 2016, par 0pcl

  The iPhone app I am working on captures images in series within certain user-defined time interval, I am looking for a way to combine these images into H264 encoded videos. I have done some research on Google, it looks like I will have to use something like ffmpeg/mencoder on iPhone ? (Also found someone ported ffmpeg to iPhone, ffmpeg4iPhone)

  However, I found that x264 is under GPL license, and requires me to open source my project if I use ffmpeg. Also found some people suggested to use Ogg Theora, but I will need to port it to iPhone if I use it. (Which I am not sure how to do it now).

  Is there any workaround for this ? Any ideas ? Thanks.