Recherche avancée

Sur d’autres sites (6609)

• Use ffmpeg example remuxing.c to record rtmp live stream to mp4 file, it add an empty elst box, how to forbid it ?

  1er octobre 2016, par 谢金运

  Use ffmpeg example remuxing.c to record rtmp live stream to mp4 file, it add an empty elst box, how to forbid it ?

  The final MP4 file is :

  

• record rtsp stream to file(muxing)

  11 avril 2014, par user3521863

  AVFormatContext *g_oc = NULL;
  
  AVStream *g_in_audio_st, *g_in_video_st;
  
  AVStream *g_out_audio_st, *g_out_video_st;
  
  int audio_pts = 0, video_pts = 0, audio_dts = 0, video_dts = 0;
  
  int last_video_pts = 0;
  
  AVPacket outpkt, *av_pkt;
  
  
  
  // initialize video codec
  
  static void init_video_codec(AVFormatContext *context) {
  
      LOGI(1, "enter init_video_codec");
  
      AVFormatContext *in_format_ctx = NULL;
  
      AVCodecContext *avcodec_ctx = NULL;
  
      int fps = 0;
  
  
  
      if(context->streams[1]->r_frame_rate.num != AV_NOPTS_VALUE &&
  
              context->streams[1]->r_frame_rate.den != 0)
  
          fps = context->streams[1]->r_frame_rate.num / context->streams[1]->r_frame_rate.den;
  
      else
  
          fps = 25;
  
  
  
      g_out_video_st = avformat_new_stream(g_oc, context->streams[1]->codec->codec);
  
      LOGI(1, "video avformat_new_stream");
  
      if( g_out_video_st == NULL ) {
  
          LOGE(1, "Fail to Allocate Output Video Stream");
  
          return ;
  
      }
  
      else {
  
          LOGI(1, "Allocated Video Stream");
  
          if( avcodec_copy_context(g_out_video_st->codec, context->streams[1]->codec) != 0 ) {
  
              LOGE(1, "Failed to video Copy Context");
  
  
  
              return ;
  
          }
  
          else {
  
              LOGI(1, "Success to video Copy Context");
  
  // how to setting video stream parameter?
  
  
  
              g_out_video_st->sample_aspect_ratio.den = g_in_video_st->codec->sample_aspect_ratio.den;
  
              g_out_video_st->sample_aspect_ratio.num = g_in_video_st->codec->sample_aspect_ratio.num;
  
              g_out_video_st->codec->codec_id         = g_in_video_st->codec->codec->id;
  
              g_out_video_st->codec->time_base.num    = 1;
  
              g_out_video_st->codec->time_base.den    = fps * (g_in_video_st->codec->ticks_per_frame);
  
              g_out_video_st->time_base.num           = 1;
  
              g_out_video_st->time_base.den           = 1000;
  
              g_out_video_st->r_frame_rate.num        = fps;
  
              g_out_video_st->r_frame_rate.den        = 1;
  
              g_out_video_st->avg_frame_rate.den      = 1;
  
              g_out_video_st->avg_frame_rate.num      = fps;
  
              g_out_video_st->codec->width            = g_frame_width;
  
              g_out_video_st->codec->height           = g_frame_height;
  
              g_out_video_st->codec->flags |= CODEC_FLAG_GLOBAL_HEADER;
  
          }
  
      }
  
  
  
      LOGI(1, "end video init");
  
  }
  
  
  
  // initialize audio codec
  
  static void init_audio_codec(AVFormatContext *context) {
  
      LOGI(1, "enter init_audio_codec");
  
      AVFormatContext *in_format_ctx = NULL;
  
      AVCodecContext *avcodec_ctx = NULL;
  
  
  
      g_out_audio_st = avformat_new_stream(g_oc, context->streams[0]->codec->codec);
  
      LOGI(1, "audio avformat_new_stream");
  
      if( avcodec_copy_context(g_out_audio_st->codec, context->streams[0]->codec) != 0 ) {
  
          LOGE(1, "Failed to Copy audio Context");
  
  
  
          return ;
  
      }
  
      else {
  
          LOGI(1, "Success to Copy audio Context");
  
  // how to setting video stream parameter?
  
          g_out_audio_st->codec->codec_id         = g_in_audio_st->codec->codec_id;
  
          g_out_audio_st->codec->codec_tag        = 0;
  
          g_out_audio_st->pts                     = g_in_audio_st->pts;
  
          g_out_audio_st->time_base.num           = g_in_audio_st->time_base.num;
  
          g_out_audio_st->time_base.den           = g_in_audio_st->time_base.den;
  
          g_out_audio_st->codec->flags |= CODEC_FLAG_GLOBAL_HEADER;
  
      }
  
  
  
      LOGI(1, "end init audio");
  
  }
  
  
  
  // write video stream
  
  static void write_video_stream(AVPacket *pkt) {
  
      av_pkt = NULL;
  
      av_pkt = pkt;
  
  
  
      if( pkt == NULL || sizeof(*pkt) == 0 )
  
          return;
  
  
  
      av_rescale_q(av_pkt->pts, g_in_video_st->time_base, g_in_video_st->codec->time_base);
  
      av_rescale_q(av_pkt->dts, g_in_video_st->time_base, g_in_video_st->codec->time_base);
  
  
  
      av_init_packet(&outpkt);
  
  
  
      if( av_pkt->pts != AV_NOPTS_VALUE ) {
  
          if( last_video_pts == video_pts ) {
  
              video_pts++;
  
              last_video_pts = video_pts;
  
          }
  
          outpkt.pts = video_pts;
  
      }
  
      else {
  
          outpkt.pts = AV_NOPTS_VALUE;
  
      }
  
  
  
      if( av_pkt->dts == AV_NOPTS_VALUE )
  
          outpkt.dts = AV_NOPTS_VALUE;
  
      else
  
          outpkt.dts = video_pts;
  
  
  
      outpkt.data = av_pkt->data;
  
      outpkt.size = av_pkt->size;
  
      outpkt.stream_index = av_pkt->stream_index;
  
      outpkt.flags |= AV_PKT_FLAG_KEY;
  
      last_video_pts = video_pts;
  
  
  
      if(av_interleaved_write_frame(g_oc, &outpkt) < 0) {
  
  //  if(av_write_frame(g_oc, &outpkt) < 0) {
  
          LOGE(1, "Failed Video Write");
  
      }
  
      else {
  
          g_out_video_st->codec->frame_number++;
  
      }
  
  
  
      if( !&outpkt || sizeof(outpkt) == 0 )
  
          return;
  
      if( !av_pkt || sizeof(*av_pkt) == 0 )
  
          return;
  
  
  
      av_free_packet(&outpkt);
  
  }
  
  
  
  // write audio stream
  
  static void write_audio_stream(AVPacket *pkt) {
  
      av_pkt = NULL;
  
      av_pkt = pkt;
  
  
  
      if( pkt == NULL || sizeof(*pkt) == 0 )
  
              return;
  
  
  
      av_rescale_q(av_pkt->pts, g_in_audio_st->time_base, g_in_audio_st->codec->time_base);
  
      av_rescale_q(av_pkt->dts, g_in_audio_st->time_base, g_in_audio_st->codec->time_base);
  
  
  
      av_init_packet(&outpkt);
  
  
  
      if(av_pkt->pts != AV_NOPTS_VALUE)
  
          outpkt.pts = audio_pts;
  
      else
  
          outpkt.pts = AV_NOPTS_VALUE;
  
  
  
      if(av_pkt->dts == AV_NOPTS_VALUE)
  
          outpkt.dts = AV_NOPTS_VALUE;
  
      else {
  
          outpkt.dts = audio_pts;
  
  
  
          if( outpkt.pts >= outpkt.dts)
  
              outpkt.dts = outpkt.pts;
  
  
  
          if(outpkt.dts == audio_dts)
  
              outpkt.dts++;
  
  
  
          if(outpkt.pts < outpkt.dts) {
  
              outpkt.pts = outpkt.dts;
  
              audio_pts = outpkt.pts;
  
          }
  
  
  
          outpkt.data = av_pkt->data;
  
          outpkt.size = av_pkt->size;
  
          outpkt.stream_index = av_pkt->stream_index;
  
          outpkt.flags |= AV_PKT_FLAG_KEY;
  
          video_pts = audio_pts;
  
          audio_pts++;
  
  
  
          if( av_interleaved_write_frame(g_oc, &outpkt) < 0 ) {
  
  //      if( av_write_frame(g_oc, &outpkt) < 0 ) {
  
              LOGE(1, "Failed Audio Write");
  
          }
  
          else {
  
              g_out_audio_st->codec->frame_number++;
  
          }
  
  
  
          if( !&outpkt || sizeof(outpkt) == 0 )
  
              return;
  
          if( !av_pkt || sizeof(*av_pkt) == 0 )
  
              return;
  
  
  
          av_free_packet(&outpkt);
  
      }
  
  }

  here result : recorded file
  here full source : player.c

  I want to record rtsp stream to file on playing
  i try tested video and audio streams while changing the parameters
  but this result file does not match sync between video and audio
  i try search about ffmpeg but almost command run or video recording was only.
  please advice me.
  

• better way to record desktop via ffmpeg

  29 mars 2014, par Maged E William

  in my form there's a timer that capture the screen as jpeg every 85 ms, it captures until the user shutdown the windows or electricity cut off so the last frame(image) may get corrupt which is okay for me, now when the user log in the form run on the start up now on the on load event it ask if there images in temp folder if yes it open ffmpeg to convert all images into one video but that seems to take a lot of time i have +300000 image and that because it capture the screen for at least a 10 hour every day but that will take a lot of time to convert them, i wonder if there any other way to directly record at a video and when electricity cut off that video file stay good with no corruption and with that i mean :
  i can't scroll or navigate
  

  here is my ffmpeg command : -f image2 -framerate 10 -i C:\\Temp\\%06d.jpeg -c:v libx264 -r 10 -crf 37 -pix_fmt yuv420p C:Video\\" + s + ".mp4