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• FFMPEG failing to convert to ogv [closed]

  25 juillet 2012, par Todd R

  I have several videos I'm trying to convert to mp4, swf and ogv. I've got the mp4 and swf's working, but ogv is failing and I'm not sure why. I understand all the arguments you can pass to ffmpeg, but feel like getting the correct ones is a huge guessing game. Any suggestions on what I can change to get this to work would be much appreciated.

  Here's the command I'm using :

  ffmpeg -i /private/var/tmp/phpU5KPR7 -y -s 330X240 -acodec libvorbis -vcodec libtheora outputpath/Videos/1.ogv 2>&1

  And here are the results :

  2012-07-24T19:05:11-07:00 INFO (6): Creating ogv for 1 returned 1:
  
  2012-07-24T19:05:11-07:00 INFO (6): Array
  
  (
  
      [0] => ffmpeg version 0.8.6, Copyright (c) 2000-2011 the FFmpeg developers
  
      [1] =>   built on Nov 16 2011 19:56:59 with gcc 4.2.1 (Apple Inc. build 5666) (dot 3)
  
      [2] =>   configuration: --enable-libmp3lame --enable-libfaac --enable-libtheora --enable-libvorbis --enable-nonfree --disable-yasm
  
      [3] =>   libavutil    51.  9. 1 / 51.  9. 1
  
      [4] =>   libavcodec   53.  7. 0 / 53.  7. 0
  
      [5] =>   libavformat  53.  4. 0 / 53.  4. 0
  
      [6] =>   libavdevice  53.  1. 1 / 53.  1. 1
  
      [7] =>   libavfilter   2. 23. 0 /  2. 23. 0
  
      [8] =>   libswscale    2.  0. 0 /  2.  0. 0
  
      [9] => Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/private/var/tmp/phpU5KPR7':
  
      [10] =>   Metadata:
  
      [11] =>     major_brand     : 3gp4
  
      [12] =>     minor_version   : 768
  
      [13] =>     compatible_brands: 3gp43gp6
  
      [14] =>   Duration: 00:00:03.17, start: 0.000000, bitrate: 433 kb/s
  
      [15] =>     Stream #0.0(eng): Audio: amrnb, 8000 Hz, 1 channels, flt, 12 kb/s
  
      [16] =>     Stream #0.1(eng): Video: mpeg4, yuv420p, 352x288 [PAR 1:1 DAR 11:9], 411 kb/s, 13.87 fps, 15 tbr, 15k tbn, 15 tbc
  
      [17] => WARNING: The bitrate parameter is set too low. It takes bits/s as argument, not kbits/s
  
      [18] => Incompatible sample format 'flt' for codec 'libfaac', auto-selecting format 's16'
  
      [19] => [buffer @ 0x101001480] w:352 h:288 pixfmt:yuv420p tb:1/1000000 sar:1/1 sws_param:
  
      [20] => [scale @ 0x101002560] w:352 h:288 fmt:yuv420p -> w:330 h:240 fmt:yuv420p flags:0x4
  
      [21] => Output #0, mp4, to 'outputpath/Videos/1.mp4':
  
      [22] =>   Metadata:
  
      [23] =>     major_brand     : 3gp4
  
      [24] =>     minor_version   : 768
  
      [25] =>     compatible_brands: 3gp43gp6
  
      [26] =>     encoder         : Lavf53.4.0
  
      [27] =>     Stream #0.0(eng): Video: mpeg4, yuv420p, 330x240 [PAR 8:9 DAR 11:9], q=2-31, 300 kb/s, 20 tbn, 20 tbc
  
      [28] =>     Stream #0.1(eng): Audio: libfaac, 44100 Hz, 1 channels, s16, 0 kb/s
  
      [29] => Stream mapping:
  
      [30] =>   Stream #0.1 -> #0.0
  
      [31] =>   Stream #0.0 -> #0.1
  
      [32] => Press [q] to stop, [?] for help
  
      [33] => Warning, using s16 intermediate sample format for resampling
  
      [34] => frame=   62 fps=  0 q=6.4 Lsize=     253kB time=00:00:03.08 bitrate= 670.6kbits/s dup=18 drop=0
  
      [35] => video:238kB audio:12kB global headers:0kB muxing overhead 1.096923%
  
      [36] => ffmpeg version 0.8.6, Copyright (c) 2000-2011 the FFmpeg developers
  
      [37] =>   built on Nov 16 2011 19:56:59 with gcc 4.2.1 (Apple Inc. build 5666) (dot 3)
  
      [38] =>   configuration: --enable-libmp3lame --enable-libfaac --enable-libtheora --enable-libvorbis --enable-nonfree --disable-yasm
  
      [39] =>   libavutil    51.  9. 1 / 51.  9. 1
  
      [40] =>   libavcodec   53.  7. 0 / 53.  7. 0
  
      [41] =>   libavformat  53.  4. 0 / 53.  4. 0
  
      [42] =>   libavdevice  53.  1. 1 / 53.  1. 1
  
      [43] =>   libavfilter   2. 23. 0 /  2. 23. 0
  
      [44] =>   libswscale    2.  0. 0 /  2.  0. 0
  
      [45] => Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/private/var/tmp/phpU5KPR7':
  
      [46] =>   Metadata:
  
      [47] =>     major_brand     : 3gp4
  
      [48] =>     minor_version   : 768
  
      [49] =>     compatible_brands: 3gp43gp6
  
      [50] =>   Duration: 00:00:03.17, start: 0.000000, bitrate: 433 kb/s
  
      [51] =>     Stream #0.0(eng): Audio: amrnb, 8000 Hz, 1 channels, flt, 12 kb/s
  
      [52] =>     Stream #0.1(eng): Video: mpeg4, yuv420p, 352x288 [PAR 1:1 DAR 11:9], 411 kb/s, 13.87 fps, 15 tbr, 15k tbn, 15 tbc
  
      [53] => Incompatible sample format 'flt' for codec 'libvorbis', auto-selecting format 's16'
  
      [54] => [buffer @ 0x1010021a0] w:352 h:288 pixfmt:yuv420p tb:1/1000000 sar:1/1 sws_param:
  
      [55] => [scale @ 0x101002520] w:352 h:288 fmt:yuv420p -> w:330 h:240 fmt:yuv420p flags:0x4
  
      [56] => [libvorbis @ 0x101801e00] oggvorbis_encode_init: init_encoder failed
  
      [57] => Output #0, ogg, to 'outputpath/Videos/1.ogv':
  
      [58] =>     Stream #0.0(eng): Video: libtheora, yuv420p, 330x240 [PAR 8:9 DAR 11:9], q=2-31, 200 kb/s, 90k tbn, 15 tbc
  
      [59] =>     Stream #0.1(eng): Audio: libvorbis, 8000 Hz, 1 channels, s16, 64 kb/s
  
      [60] => Stream mapping:
  
      [61] =>   Stream #0.1 -> #0.0
  
      [62] =>   Stream #0.0 -> #0.1
  
      [63] => Error while opening encoder for output stream #0.1 - maybe incorrect parameters such as bit_rate, rate, width or height
  
  )

• downsizing multiple mpg files using ffmpeg.exe

  14 septembre 2022, par user2799077

  I'm using ffmpeg.exe to process screen captures for a demo using MS Game Bar. Game Bar captures at a high frame rate at high resolution and the files are very large.

  


  Using ffmpeg.exe I can process the files using :

  


  ffmpeg.exe -i file.mpg file_l.mpg

  


  And all is good but I'd like to create a bat file so I can do half a dozen or any in a folder all at once.

  


  My Windows bat skills are poor and I've been trying to get it to work using something like this without success :

  


  for %%f in (*.mp4) do (
  ren %%~nf%%~xf !fileNum!%%~xf
  set/a fileNum += 1


  


  Can anyone help please

  


• 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'}}