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• Python : Extracting device and lens information from video metadata

  14 mai 2023, par cat_got_my_tongue

  I am interested in extracting device and lens information from videos. Specifically, make and model of the device and the focal length. I was able to do this successfully for still images using the exifread module and extract a whole bunch of very useful information :

  


  image type      : MPO
Image ImageDescription: Shot with DxO ONE
Image Make: DxO
Image Model: DxO ONE
Image Orientation: Horizontal (normal)
Image XResolution: 300
Image YResolution: 300
Image ResolutionUnit: Pixels/Inch
Image Software: V3.0.0 (2b448a1aee) APP:1.0
Image DateTime: 2022:04:05 14:53:45
Image YCbCrCoefficients: [299/1000, 587/1000, 57/500]
Image YCbCrPositioning: Centered
Image ExifOffset: 158
Thumbnail Compression: JPEG (old-style)
Thumbnail XResolution: 300
Thumbnail YResolution: 300
Thumbnail ResolutionUnit: Pixels/Inch
Thumbnail JPEGInterchangeFormat: 7156
Thumbnail JPEGInterchangeFormatLength: 24886
EXIF ExposureTime: 1/3
EXIF FNumber: 8
EXIF ExposureProgram: Aperture Priority
EXIF ISOSpeedRatings: 100
EXIF SensitivityType: ISO Speed
EXIF ISOSpeed: 100
EXIF ExifVersion: 0221
EXIF DateTimeOriginal: 2022:04:05 14:53:45
EXIF DateTimeDigitized: 2022:04:05 14:53:45
EXIF ComponentsConfiguration: CrCbY
EXIF CompressedBitsPerPixel: 3249571/608175
EXIF ExposureBiasValue: 0
EXIF MaxApertureValue: 212/125
EXIF SubjectDistance: 39/125
EXIF MeteringMode: MultiSpot
EXIF LightSource: Unknown
EXIF Flash: Flash did not fire
EXIF FocalLength: 1187/100
EXIF SubjectArea: [2703, 1802, 675, 450]
EXIF MakerNote: [68, 88, 79, 32, 79, 78, 69, 0, 12, 0, 0, 0, 21, 0, 3, 0, 5, 0, 2, 0, ... ]
EXIF SubSecTime: 046
EXIF SubSecTimeOriginal: 046
EXIF SubSecTimeDigitized: 046
EXIF FlashPixVersion: 0100
EXIF ColorSpace: sRGB
EXIF ExifImageWidth: 5406
EXIF ExifImageLength: 3604
Interoperability InteroperabilityIndex: R98
Interoperability InteroperabilityVersion: [48, 49, 48, 48]
EXIF InteroperabilityOffset: 596
EXIF FileSource: Digital Camera
EXIF ExposureMode: Auto Exposure
EXIF WhiteBalance: Auto
EXIF DigitalZoomRatio: 1
EXIF FocalLengthIn35mmFilm: 32
EXIF SceneCaptureType: Standard
EXIF ImageUniqueID: C01A1709306530020220405185345046
EXIF BodySerialNumber: C01A1709306530


  


  Unfortunately, I have been unable to extract this kind of info from videos so far.

  


  This is what I have tried so far, with the ffmpeg module :

  


  import ffmpeg
from pprint import pprint

test_video = "my_video.mp4"
pprint(ffmpeg.probe(test_video)["streams"])


  


  And the output I get contains a lot of info but nothing related to the device or lens, which is what I am looking for :

  


  [{'avg_frame_rate': '30/1',
  'bit_rate': '1736871',
  'bits_per_raw_sample': '8',
  'chroma_location': 'left',
  'codec_long_name': 'H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10',
  'codec_name': 'h264',
  'codec_tag': '0x31637661',
  'codec_tag_string': 'avc1',
  'codec_time_base': '1/60',
  'codec_type': 'video',
  'coded_height': 1088,
  'coded_width': 1920,
  'display_aspect_ratio': '16:9',
  'disposition': {'attached_pic': 0,
                  'clean_effects': 0,
                  'comment': 0,
                  'default': 1,
                  'dub': 0,
                  'forced': 0,
                  'hearing_impaired': 0,
                  'karaoke': 0,
                  'lyrics': 0,
                  'original': 0,
                  'timed_thumbnails': 0,
                  'visual_impaired': 0},
  'duration': '20.800000',
  'duration_ts': 624000,
  'has_b_frames': 0,
  'height': 1080,
  'index': 0,
  'is_avc': 'true',
  'level': 40,
  'nal_length_size': '4',
  'nb_frames': '624',
  'pix_fmt': 'yuv420p',
  'profile': 'Constrained Baseline',
  'r_frame_rate': '30/1',
  'refs': 1,
  'sample_aspect_ratio': '1:1',
  'start_pts': 0,
  'start_time': '0.000000',
  'tags': {'creation_time': '2021-05-08T13:23:20.000000Z',
           'encoder': 'AVC Coding',
           'handler_name': 'VideoHandler',
           'language': 'und'},
  'time_base': '1/30000',
  'width': 1920},
 {'avg_frame_rate': '0/0',
  'bit_rate': '79858',
  'bits_per_sample': 0,
  'channel_layout': 'stereo',
  'channels': 2,
  'codec_long_name': 'AAC (Advanced Audio Coding)',
  'codec_name': 'aac',
  'codec_tag': '0x6134706d',
  'codec_tag_string': 'mp4a',
  'codec_time_base': '1/48000',
  'codec_type': 'audio',
  'disposition': {'attached_pic': 0,
                  'clean_effects': 0,
                  'comment': 0,
                  'default': 1,
                  'dub': 0,
                  'forced': 0,
                  'hearing_impaired': 0,
                  'karaoke': 0,
                  'lyrics': 0,
                  'original': 0,
                  'timed_thumbnails': 0,
                  'visual_impaired': 0},
  'duration': '20.864000',
  'duration_ts': 1001472,
  'index': 1,
  'max_bit_rate': '128000',
  'nb_frames': '978',
  'profile': 'LC',
  'r_frame_rate': '0/0',
  'sample_fmt': 'fltp',
  'sample_rate': '48000',
  'start_pts': 0,
  'start_time': '0.000000',
  'tags': {'creation_time': '2021-05-08T13:23:20.000000Z',
           'handler_name': 'SoundHandler',
           'language': 'und'},
  'time_base': '1/48000'}]


  


  Are these pieces of info available for videos ? Should I be using a different package ?

  


  Thanks.

  


  Edit :

  


  pprint(ffmpeg.probe(test_video)["format"]) gives

  


  {'bit_rate': '1815244',
 'duration': '20.864000',
 'filename': 'my_video.mp4',
 'format_long_name': 'QuickTime / MOV',
 'format_name': 'mov,mp4,m4a,3gp,3g2,mj2',
 'nb_programs': 0,
 'nb_streams': 2,
 'probe_score': 100,
 'size': '4734158',
 'start_time': '0.000000',
 'tags': {'artist': 'Microsoft Game DVR',
          'compatible_brands': 'mp41isom',
          'creation_time': '2021-05-08T12:12:33.000000Z',
          'major_brand': 'mp42',
          'minor_version': '0',
          'title': 'Snipping Tool'}}


  


• ffmpeg low speed on AMD encoder

  13 octobre 2022, par Peter Czask

  I'm encoding some videos with ffmpeg, if I use only CPU the speed it's about 1x, so as I have an AMD RX580 I tried with amd encoding, but only increased the speed to 1.5x. Is this ok ? Should it go faster ?

  


  My command is :

  


  ffmpeg -i 5.mp4 -c:v h264_amf -lavfi "[0:v]scale=1920:1080,boxblur=luma_radius=min(h\,w)/8:luma_power=1:chroma_radius=min(cw\,ch)/8:chroma_power=1[bg];[0:v]scale=-1:1080[ov];[bg][ov]overlay=(W-w)/2:(H-h)/2,crop=w=1920:h=1080" output.mp4


  


  Can I do anything to increase the speed ?

  


  Thanks

  


• FFMPEG Without Headers is Causing Video To Be Height 0X0

  21 novembre 2022, par Devin Dixon

  I am grabbing a stream from X11 and streaming it to other sources like Node Media Server and Twitch. Except, I get audio only with no video and the resolution size says 0X0.

  


  My ffmpeg is command is this :

  


   /usr/bin/ffmpeg -hide_banner -hwaccel vaapi -hwaccel_output_format vaapi -vaapi_device /dev/dri/renderD128 -video_size 1920x1080 -y -v info -f x11grab -draw_mouse 0 -r 60 -s 1920x1080 -thread_queue_size 14000 -i :0.0+0,0 -f alsa -thread_queue_size 14000 -i plug:bsnoop -acodec aac -strict -2 -ar 44100 -b:a 128k -af aresample=async=1 -c:v h264_vaapi -vf format=nv12,hwupload,scale_vaapi=w=1920:h=1080 -attempt_recovery 1 -max_recovery_attempts 2 -drop_pkts_on_overflow 1 -video_size 1920x1080 -crf 19 -preset medium -maxrate 14000k -bufsize 14000k -r 60 -crf 25 -g 120 -tune zerolatency -f flv rtmp://[some_other_source]


  


  The ffmpeg output is as follows :

  


  2022-11-21 13:42:45.527 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42: Codec AVOption crf (Select the quality for constant quality mode) specified for output file #0 (rtmp://[some_other_sorce]) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
2022-11-21 13:42:45.527 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42: Codec AVOption tune (The metric that the encoder tunes for. Automatically chosen by the encoder by default) specified for output file #0 (rtmp://[some_other_source]) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
2022-11-21 13:42:45.527 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42: Codec AVOption preset (Encoding preset) specified for output file #0 (rtmp://relay.bingewave.com/live/e3057272-271d-40d5-90d1-f9065c5dfa37-broadcast?sign=1669642928-17aa73baeaedaad786140b5b2cca9d2b) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
2022-11-21 13:42:45.527 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42: Codec AVOption preset (Encoding preset) specified for output file #1 (rtmp://127.0.0.1:1935/live/e3057272-271d-40d5-90d1-f9065c5dfa37-broadcast?sign=1669642928-17aa73baeaedaad786140b5b2cca9d2b) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
2022-11-21 13:42:45.527 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42: Codec AVOption tune (The metric that the encoder tunes for. Automatically chosen by the encoder by default) specified for output file #1 (rtmp://127.0.0.1:1935/live/['for_reording']) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
2022-11-21 13:42:45.550 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42: Codec AVOption crf (Select the quality for constant quality mode) specified for output file #1 (rtmp://127.0.0.1:1935/live/e3057272-271d-40d5-90d1-f9065c5dfa37-broadcast?sign=1669642928-17aa73baeaedaad786140b5b2cca9d2b) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
2022-11-21 13:42:45.550 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42: Stream mapping:
2022-11-21 13:42:45.550 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42:   Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (h264_vaapi))
2022-11-21 13:42:45.550 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42:   Stream #1:0 -> #0:1 (pcm_s16le (native) -> aac (native))
2022-11-21 13:42:45.550 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42:   Stream #0:0 -> #1:0 (rawvideo (native) -> h264 (h264_vaapi))
2022-11-21 13:42:45.550 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42:   Stream #1:0 -> #1:1 (pcm_s16le (native) -> mp3 (libmp3lame))
2022-11-21 13:42:45.550 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42: Press [q] to stop, [?] for help
2022-11-21 13:42:45.550 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42: [h264_vaapi @ 0x55a02df06980] No quality level set; using default (20).
2022-11-21 13:42:45.550 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42: [h264_vaapi @ 0x55a02df06980] Buffering settings are ignored in CQP RC mode.
2022-11-21 13:42:45.550 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42: [h264_vaapi @ 0x55a02df06980] Driver does not support some wanted packed headers (wanted 0xd, found 0).
2022-11-21 13:42:45.550 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42: [h264_vaapi @ 0x55a02df06980] Driver does not support packed sequence headers, but a global header is requested.
2022-11-21 13:42:45.583 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42: [h264_vaapi @ 0x55a02df06980] No global header will be written: this may result in a stream which is not usable for some purposes (e.g. not muxable to some containers).
2022-11-21 13:42:45.584 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42: [h264_vaapi @ 0x55a02df0a700] Driver does not support some wanted packed headers (wanted 0xd, found 0).
2022-11-21 13:42:45.584 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42: [h264_vaapi @ 0x55a02df0a700] Driver does not support packed sequence headers, but a global header is requested.
2022-11-21 13:42:45.584 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42: [h264_vaapi @ 0x55a02df0a700] No global header will be written: this may result in a stream which is not usable for some purposes (e.g. not muxable to some containers).
2022-11-21 13:42:45.584 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42: Output #0, flv, to 'rtmp://relay.bingewave.com/live/[some_other_source]':
2022-11-21 13:42:45.584 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42:   Metadata:
2022-11-21 13:42:45.584 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42:     encoder         : Lavf59.27.100
2022-11-21 13:42:45.584 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42:   Stream #0:0: Video: h264 (High) ([7][0][0][0] / 0x0007), vaapi(tv, progressive), 1920x1080, q=2-31, 60 fps, 1k tbn
2022-11-21 13:42:45.584 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42:     Metadata:
2022-11-21 13:42:45.584 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42:       encoder         : Lavc59.37.100 h264_vaapi
2022-11-21 13:42:45.584 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42:   Stream #0:1: Audio: aac (LC) ([10][0][0][0] / 0x000A), 44100 Hz, stereo, fltp, 128 kb/s
2022-11-21 13:42:45.584 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42:     Metadata:
2022-11-21 13:42:45.584 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42:       encoder         : Lavc59.37.100 aac
2022-11-21 13:42:46.584 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42: Output #1, flv, to 'rtmp://127.0.0.1:1935/live/e3057272-271d-40d5-90d1-f9065c5dfa37-broadcast?sign=1669642928-17aa73baeaedaad786140b5b2cca9d2b':
2022-11-21 13:42:46.584 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42:   Metadata:
2022-11-21 13:42:46.584 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42:     encoder         : Lavf59.27.100
2022-11-21 13:42:46.584 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42:   Stream #1:0: Video: h264 (High) ([7][0][0][0] / 0x0007), vaapi(tv, progressive), 1920x1080, q=2-31, 15000 kb/s, 60 fps, 1k tbn
2022-11-21 13:42:46.584 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42:     Metadata:
2022-11-21 13:42:46.584 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42:       encoder         : Lavc59.37.100 h264_vaapi
2022-11-21 13:42:46.584 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42:   Stream #1:1: Audio: mp3 ([2][0][0][0] / 0x0002), 48000 Hz, stereo, s16p
2022-11-21 13:42:46.584 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42:     Metadata:
2022-11-21 13:42:46.584 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42:       encoder         : Lavc59.37.100 libmp3lame
2022-11-21 13:42:46.584 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42: frame=    1 fps=0.0 q=-0.0 q=-0.0 size=       7kB time=00:00:00.06 bitrate= 875.5kbits/s speed=1.31x    
2022-11-21 13:42:46.584 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42: frame=   31 fps=0.0 q=-0.0 q=-0.0 size=     281kB time=00:00:00.55 bitrate=4133.2kbits/s speed=1.01x    
2022-11-21 13:42:47.325 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42: frame=   60 fps= 57 q=-0.0 q=-0.0 size=     546kB time=00:00:01.18 bitrate=3774.7kbits/s speed=1.12x    
2022-11-21 13:42:47.325 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42: frame=   91 fps= 58 q=-0.0 q=-0.0 size=     828kB time=00:00:01.69 bitrate=4003.3kbits/s speed=1.08x    
2022-11-21 13:42:47.325 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42: [flv @ 0x55a02df10e00] Failed to update header with correct duration.
2022-11-21 13:42:47.325 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42: [flv @ 0x55a02df10e00] Failed to update header with correct filesize.
2022-11-21 13:42:47.325 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42: [flv @ 0x55a02df15500] Failed to update header with correct duration.
2022-11-21 13:42:47.325 INFO: [658] LoggingUtils$Companion$OutputLogger$1.invoke$lambda-0#42: [flv @ 0x55a02df15500] Failed to update header with correct filesize.


  


  I've noticed there are several errors the headers going out. For VAAPI, how do I set resolution header ?