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• FFMPEG Concat DNxHD-Files : wrong duration of output-file

  4 mai 2020, par Thomas

  I have AVID-DNxHD-files created by Ikegami EditCamHD and FFMPEG-coded DNxHD-Files.

  



  Ikegami-Files are 1080/25psF at 185MBit/sec (10Bit). FFMPEG-Files are crated with this command :

  



  ffmpeg -loop 1 -i c:\pics\VideoNichtVorhanden.jpg -s 1920x1080 -r 25 -t 92.8 -c:v dnxhd -b:v 185M -pix_fmt yuv422p10le d:\MissingFiles\missing_0001.mov


  



  ffprobe from Ikegami-file :

  



  {
  "streams": [
    {
      "index": 0,
      "codec_name": "dnxhd",
      "codec_long_name": "VC3\/DNxHD",
      "profile": "DNXHD",
      "codec_type": "video",
      "codec_time_base": "1\/25",
      "codec_tag_string": "[0][0][0][0]",
      "codec_tag": "0x0000",
      "width": 1920,
      "height": 1080,
      "coded_width": 1920,
      "coded_height": 1088,
      "has_b_frames": 0,
      "sample_aspect_ratio": "1:1",
      "display_aspect_ratio": "16:9",
      "pix_fmt": "yuv422p10le",
      "level": -99,
      "color_space": "bt709",
      "field_order": "tt",
      "refs": 1,
      "r_frame_rate": "25\/1",
      "avg_frame_rate": "25\/1",
      "time_base": "1\/25",
      "start_pts": 0,
      "start_time": "0.000000",
      "duration_ts": 827,
      "duration": "33.080000",
      "bits_per_raw_sample": "10",
      "disposition": {
        "default": 0,
        "dub": 0,
        "original": 0,
        "comment": 0,
        "lyrics": 0,
        "karaoke": 0,
        "forced": 0,
        "hearing_impaired": 0,
        "visual_impaired": 0,
        "clean_effects": 0,
        "attached_pic": 0,
        "timed_thumbnails": 0
      },
      "tags": {
        "file_package_umid": "0x060A2B340101010101010F0013000000D6F21F070302074C060E2B347F7F2A80",
        "file_package_name": "File Package",
        "track_name": "V1"
      }
    },
    {
      "index": 1,
      "codec_type": "data",
      "codec_tag_string": "[0][0][0][0]",
      "codec_tag": "0x0000",
      "r_frame_rate": "0\/0",
      "avg_frame_rate": "0\/0",
      "time_base": "1\/90000",
      "start_pts": 0,
      "start_time": "0.000000",
      "duration_ts": 2977200,
      "duration": "33.080000",
      "disposition": {
        "default": 0,
        "dub": 0,
        "original": 0,
        "comment": 0,
        "lyrics": 0,
        "karaoke": 0,
        "forced": 0,
        "hearing_impaired": 0,
        "visual_impaired": 0,
        "clean_effects": 0,
        "attached_pic": 0,
        "timed_thumbnails": 0
      },
      "tags": {
        "file_package_umid": "0x060A2B34010101010101080013000000D6F21F070276074C060E2B347F7F2A80",
        "track_name": "A1",
        "data_type": "audio"
      }
    },
    {
      "index": 2,
      "codec_type": "data",
      "codec_tag_string": "[0][0][0][0]",
      "codec_tag": "0x0000",
      "r_frame_rate": "0\/0",
      "avg_frame_rate": "0\/0",
      "time_base": "1\/90000",
      "start_pts": 0,
      "start_time": "0.000000",
      "duration_ts": 2977200,
      "duration": "33.080000",
      "disposition": {
        "default": 0,
        "dub": 0,
        "original": 0,
        "comment": 0,
        "lyrics": 0,
        "karaoke": 0,
        "forced": 0,
        "hearing_impaired": 0,
        "visual_impaired": 0,
        "clean_effects": 0,
        "attached_pic": 0,
        "timed_thumbnails": 0
      },
      "tags": {
        "file_package_umid": "0x060A2B34010101010101080013000000D6F21F07028A074C060E2B347F7F2A80",
        "track_name": "A2",
        "data_type": "audio"
      }
    }
  ],
  "format": {
    "filename": "G:\\MXF-sortiert\\Ikegami\\2018-04-10\\V\\MULTI_NN17GN0V\\NN17GN0V.0001.MXF",
    "nb_streams": 3,
    "nb_programs": 0,
    "format_name": "mxf",
    "format_long_name": "MXF (Material eXchange Format)",
    "start_time": "0.000000",
    "duration": "33.080000",
    "size": "761004264",
    "bit_rate": "184039725",
    "probe_score": 100,
    "tags": {
      "operational_pattern_ul": "060e2b34.04010102.0d010201.10030000",
      "uid": "caf0bf8e-ff07-b34d-9616-bc3e7bd32d54",
      "generation_uid": "fb90769f-a46d-d546-983d-dda63339a8fd",
      "company_name": "Ikegami",
      "product_name": "HDN-X10",
      "product_version": "1.30d",
      "product_uid": "3e2189d7-294b-4612-8243-1b1990e14055",
      "modification_date": "2018-04-10T05:57:59.788000Z",
      "material_package_umid": "0x060A2B340101010101010F0013000000D6F21F070262074C060E2B347F7F2A80",
      "material_package_name": "01047",
      "timecode": "01:23:17:03"
    }
  }
}


  



  ffprobe from ffmpeg-coded-file :

  



  {
  "streams": [
    {
      "index": 0,
      "codec_name": "dnxhd",
      "codec_long_name": "VC3\/DNxHD",
      "profile": "DNXHD",
      "codec_type": "video",
      "codec_time_base": "1\/25",
      "codec_tag_string": "AVdn",
      "codec_tag": "0x6e645641",
      "width": 1920,
      "height": 1080,
      "coded_width": 1920,
      "coded_height": 1088,
      "has_b_frames": 0,
      "sample_aspect_ratio": "1:1",
      "display_aspect_ratio": "16:9",
      "pix_fmt": "yuv422p10le",
      "level": -99,
      "color_range": "tv",
      "color_space": "bt709",
      "refs": 1,
      "r_frame_rate": "25\/1",
      "avg_frame_rate": "25\/1",
      "time_base": "1\/12800",
      "start_pts": 0,
      "start_time": "0.000000",
      "duration_ts": 1187840,
      "duration": "92.800000",
      "bit_rate": "183500800",
      "bits_per_raw_sample": "10",
      "nb_frames": "2320",
      "disposition": {
        "default": 1,
        "dub": 0,
        "original": 0,
        "comment": 0,
        "lyrics": 0,
        "karaoke": 0,
        "forced": 0,
        "hearing_impaired": 0,
        "visual_impaired": 0,
        "clean_effects": 0,
        "attached_pic": 0,
        "timed_thumbnails": 0
      },
      "tags": {
        "handler_name": "VideoHandler",
        "encoder": "Lavc58.54.100 dnxhd"
      }
    }
  ],
  "format": {
    "filename": "G:\\MXF-sortiert\\Ikegami\\2018-04-10\\V\\MULTI_NN1EUS0V\\MXF\\NN1EUS0V.0001.mov",
    "nb_streams": 1,
    "nb_programs": 0,
    "format_name": "mov,mp4,m4a,3gp,3g2,mj2",
    "format_long_name": "QuickTime \/ MOV",
    "start_time": "0.000000",
    "duration": "92.800000",
    "size": "2128619444",
    "bit_rate": "183501676",
    "probe_score": 100,
    "tags": {
      "major_brand": "qt  ",
      "minor_version": "512",
      "compatible_brands": "qt  ",
      "encoder": "Lavf58.29.100"
    }
  }
}


  



  When I concat for example one .mxf with one .mov and another .mxf at the end, the duration is frong (about 26 Miuntes when it should be some 4 Minutes or so) and VLC-Player gives a Framerate of a very slow framerate and the video does not play the ffmpeg coded part.

  



  ffprobe from concat-output :

  



  {
  "streams": [
    {
      "index": 0,
      "codec_name": "dnxhd",
      "codec_long_name": "VC3\/DNxHD",
      "profile": "DNXHD",
      "codec_type": "video",
      "codec_time_base": "20268137\/1351040",
      "codec_tag_string": "AVdn",
      "codec_tag": "0x6e645641",
      "width": 1920,
      "height": 1080,
      "coded_width": 1920,
      "coded_height": 1088,
      "has_b_frames": 0,
      "sample_aspect_ratio": "1:1",
      "display_aspect_ratio": "16:9",
      "pix_fmt": "yuv422p10le",
      "level": -99,
      "color_range": "tv",
      "color_space": "bt709",
      "refs": 1,
      "r_frame_rate": "25\/1",
      "avg_frame_rate": "1351040\/20268137",
      "time_base": "1\/12800",
      "start_pts": 0,
      "start_time": "0.000000",
      "duration_ts": 1216088220,
      "duration": "95006.892188",
      "bit_rate": "489252",
      "bits_per_raw_sample": "10",
      "nb_frames": "6333",
      "disposition": {
        "default": 1,
        "dub": 0,
        "original": 0,
        "comment": 0,
        "lyrics": 0,
        "karaoke": 0,
        "forced": 0,
        "hearing_impaired": 0,
        "visual_impaired": 0,
        "clean_effects": 0,
        "attached_pic": 0,
        "timed_thumbnails": 0
      },
      "tags": {
        "handler_name": "VideoHandler"
      }
    }
  ],
  "format": {
    "filename": "G:\\MXF-sortiert\\Ikegami\\2018-04-10\\V\\NN1EUS0V_MIES.mov",
    "nb_streams": 1,
    "nb_programs": 0,
    "format_name": "mov,mp4,m4a,3gp,3g2,mj2",
    "format_long_name": "QuickTime \/ MOV",
    "start_time": "0.000000",
    "duration": "95006.893000",
    "size": "5810367616",
    "bit_rate": "489258",
    "probe_score": 100,
    "tags": {
      "major_brand": "qt  ",
      "minor_version": "512",
      "compatible_brands": "qt  ",
      "encoder": "Lavf58.29.100"
    }
  }
}


  



  The Ikegami and ffmpeg-coded files for themselves are playing great and do show the correct fps in VLC.

  



  I can see in the probe-logs the

  



    "codec_time_base": "20268137\/1351040"


  



  and

  



    "avg_frame_rate": "1351040\/20268137"


  



  What is going wrong here ? How can I improve the coding-part and / or the concat to get a good result ? Is it only possible with re-encode instead of c:v copy ?

  



  Any help welcome, thanks in advance,

  



  tom

  


• Anomalie #4254 : textwheel : règle paragraphes dans spip.yaml insère des au mauvais endroit

  17 décembre 2018, par jluc -

  Doublon de #4233 https://core.spip.net/issues/4233

• How to check when ffmpeg completes a task ?

  25 mai 2018, par Andrew

  I’m just learning how to use ffmpeg a few hours ago to generate video thumbnails.

  These are some results :

  

  

  I’d used the same size (width - height) to Youtube’s. Each image contains max 25 thumbnails (5x5) with the size 160x90.

  Everything looks good until :

  public async Task GetVideoThumbnailsAsync(string videoPath, string videoId)
  
  {
  
      byte thumbnailWidth = 160;
  
      byte thumbnailHeight = 90;
  
  
  
      string fps = "1/2";
  
  
  
      videoPath = Path.Combine(_environment.WebRootPath, videoPath);
  
  
  
      string videoThumbnailsPath = Path.Combine(_environment.WebRootPath, $"assets/images/video_thumbnails/{videoId}");
  
      string outputImagePath = Path.Combine(videoThumbnailsPath, "item_%d.jpg");
  
  
  
      Directory.CreateDirectory(videoThumbnailsPath);
  
  
  
      using (var ffmpeg = new Process())
  
      {
  
          ffmpeg.StartInfo.Arguments = $" -i {videoPath} -vf fps={fps} -s {thumbnailWidth}x{thumbnailHeight} {outputImagePath}";
  
          ffmpeg.StartInfo.FileName = Path.Combine(_environment.ContentRootPath, "FFmpeg/ffmpeg.exe");
  
          ffmpeg.Start();
  
      }
  
  
  
      await Task.Delay(3000);
  
  
  
      await GenerateThumbnailsAsync(videoThumbnailsPath, videoId);
  
  }

  I’m getting a trouble with the line :

  await Task.Delay(3000);

  When I learn the way to use ffmpeg, they didn’t mention about it. After some hours failed, I notice that :

  An mp4 video (1 min 31 sec - 1.93Mb) requires some delay time 1000ms. And other, an mp4 video (1 min 49 sec - 7.25Mb) requires some delay time 3000ms.

  If I don’t use Task.Delay and try to get all the files immediately, it would return 0 (there was no file in the directory).

  Plus, each file which has a difference length to the others requires a difference delay time. I don’t know how to calculate it.

  And my question is : How to check when the task has completed ?

  P/s : I don’t mean to relate to javascript, but in js, there is something called Promise :

  var promise = new Promise(function (done) {
  
      var todo = function () {
  
          done();
  
      };
  
  
  
      todo();
  
  });
  
  
  
  promise.then(function () {
  
      console.log('DONE...');
  
  });

  I want to edit the code like that.

  Thank you !