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• Why is FFProbe (using fluent-ffmpeg) returning incomplete and inaccurate metadata ?

  18 avril 2024, par volume one

  I am returning metadata about a file using ffprobe. The file can be found here.

  


  I am using fluent-ffmpeg in Node.js which shouldn't make any difference. Its just nicer to use than a command-line.

  


  The code goes like this :

  


  ffmpeg.ffprobe('https://devxxx001.s3.amazonaws.com/vertical-hd_720_1280_30fps.mp4'), function (err, metadata) {
 console.log(JSON.stringify(metadata));
});


  


  The metadata output I receive is this :

  


  {
  "streams": [
    {
      "index": 0,
      "codec_name": "h264",
      "codec_long_name": "H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10",
      "profile": "High",
      "codec_type": "video",
      "codec_tag_string": "avc1",
      "codec_tag": "0x31637661",
      "width": 720,
      "height": 1280,
      "coded_width": 720,
      "coded_height": 1280,
      "closed_captions": 0,
      "film_grain": 0,
      "has_b_frames": 2,
      "sample_aspect_ratio": "N/A",
      "display_aspect_ratio": "N/A",
      "pix_fmt": "yuv420p",
      "level": 32,
      "color_range": "tv",
      "color_space": "bt709",
      "color_transfer": "bt709",
      "color_primaries": "bt709",
      "chroma_location": "left",
      "field_order": "progressive",
      "refs": 1,
      "is_avc": "true",
      "nal_length_size": 4,
      "id": "0x1",
      "r_frame_rate": "30/1",
      "avg_frame_rate": "30/1",
      "time_base": "1/30",
      "start_pts": 0,
      "start_time": 0,
      "duration_ts": 267,
      "duration": 8.9,
      "bit_rate": 2382497,
      "max_bit_rate": "N/A",
      "bits_per_raw_sample": 8,
      "nb_frames": 267,
      "nb_read_frames": "N/A",
      "nb_read_packets": "N/A",
      "extradata_size": 47,
      "tags": {
        "creation_time": "2020-05-19T10:09:46.000000Z",
        "language": "und",
        "handler_name": "L-SMASH Video Handler",
        "vendor_id": "[0][0][0][0]",
        "encoder": "AVC Coding"
      },
      "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,
        "captions": 0,
        "descriptions": 0,
        "metadata": 0,
        "dependent": 0,
        "still_image": 0
      }
    }
  ],
  "format": {
    "filename": "https:/devxxx001.s3.amazonaws.com/vertical-hd_720_1280_30fps.mp4",
    "nb_streams": 1,
    "nb_programs": 0,
    "format_name": "mov,mp4,m4a,3gp,3g2,mj2",
    "format_long_name": "QuickTime / MOV",
    "start_time": 0,
    "duration": 8.9,
    "size": 2654719,
    "bit_rate": 2386264,
    "probe_score": 100,
    "tags": {
      "major_brand": "mp42",
      "minor_version": "0",
      "compatible_brands": "mp42mp41isomavc1",
      "creation_time": "2020-05-19T10:09:46.000000Z"
    }
  },
  "chapters": []
}


  


  I need to know the aspect ratio of the video so that I can display it properly but ffprobe is returning "N/A" :

  


   "sample_aspect_ratio": "N/A",
 "display_aspect_ratio": "N/A",


  


  In addition, if I want to know the video container format (mp4 in this case), it is showing multiple formats instead of just one :

  


   "format_name": "mov,mp4,m4a,3gp,3g2,mj2",
 "format_long_name": "QuickTime / MOV",


  


  I believe it may be an issue with the ffprobe command but I am unable to pass it options like on the command-line. Even then I don't know what options need to be passed to get the correct metadata.

  


• Set video's metadata by Python

  17 février 2023, par Anton Bohatov

  I need to upload the video to Google Photos. There is no way to set a date in request, only by metadata. I made a test by setting the date manually (windows, file options) and it works in Google Photos. So, I don't understand how to set it by Python. I found the needed value, but I can't set it.

  


  import ffmpeg

file_path = r"test.MP4"
vid = ffmpeg.probe(file_path)

vid['streams'][0]['tags']['creation_time']


  


  Result '2020-11-01T20:07:09.000000Z'

  


  I tried vid['streams'][0]['tags']['creation_time'] = '2015-11-01T20:07:09.000000Z'

  


  But nothing changes. Please help.

  


  Note that this is about the video file's metadata, NOT WINDOWS DATA

  


• avformat/mov : read PCM audio configuration box ('pcmC') if available

  7 juin 2022, par Ivan Baykalov

  avformat/mov : read PCM audio configuration box ('pcmC') if available
  For ipcm and fpcm streams, big-endian format is the default, but it can be changed
  
  with additional 'pcmC' sub-atom of audio sample description.
  Details can be found in ISO/IEC 23003-5:2020
  Fixes ticket #9763.
  
  Fixes ticket #9790.
  Patch simplified by Marton Balint.
  Signed-off-by : Marton Balint <cus@passwd.hu>
  

  • [DH] libavformat/mov.c