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• FFMPEG Conversion Options [migrated]

  7 mars 2013, par Mike

  So, I've got some video files I want to convert so they match the formatting on another video file. I've got the format data (from ffprobe) for the video I want to match but I'm not sure how to use that to determine the options to convert my other videos. Any help ?

  Here are the settings on the file I want to match from ffprobe :

      Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'clip #19.mov':
  
        Metadata:
  
          major_brand     : qt  
  
          minor_version   : 537199360
  
          compatible_brands: qt  
  
          creation_time   : 2013-03-05 22:27:26
  
        Duration: 00:15:00.00, start: 0.000000, bitrate: 119406 kb/s
  
          Stream #0:0(eng): Video: prores (apcn / 0x6E637061), yuv422p10le, 1440x1080, 117804 kb/s, SAR 4:3 DAR 16:9, 29.97 fps, 29.97 tbr, 2997 tbn, 2997 tbc
  
          Metadata:
  
            creation_time   : 2013-03-05 22:27:26
  
            handler_name    : Apple Alias Data Handler
  
            timecode        : 00:00:00;00
  
          Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, 2 channels, s16, 1536 kb/s
  
          Metadata:
  
            creation_time   : 2013-03-05 22:27:26
  
            handler_name    : Apple Alias Data Handler
  
          Stream #0:2(eng): Data: none (tmcd / 0x64636D74)
  
          Metadata:
  
            creation_time   : 2013-03-05 22:27:26
  
            handler_name    : Apple Alias Data Handler
  
            timecode        : 00:00:00;00
  
      Unsupported codec with id 0 for input stream 2

  Any help would be greatly appreciated. Thanks.

• HLS Streaming on IPad with IOS 7 / 8 causes 10 seconds freezed frame - no clue why

  25 juin 2014, par user3747636

  We have a problem with HLS h.264 mp4 on IPad devices using HLS streaming on IOS 7 and 8 :

  The first 9-15 seconds (the length of the first TS segment) only shows the first key frame (IDR) of the second TS segment, while the sound plays normally. When the second segment begins to play, the video continues as it should.

  HLS segmenter is a wowza with 10 seconds segment length. The encoding software we use is TMPG, latest version (uses x264). The funny thing is, that handbrake, xmedia recode, adobe me deliver videos which work. I am aware of the fact, that this hints to a bug within our encoding software, but if someone already had that problem with another software / segmenter combination and fixed it, I would like to know what the source of the problem was.

  What we already tried :

  • changing almost every setting so that it sticks as close as possible to apple’s recommendations
  • changing GOP structure, GOP length, encoding parameters which influence efficiency of encoding
  • analysis of the TS segments created by wowza, they are fine and begin all with keyframes
  • contact TMPG/Apple/Wowza support

  So, did anyone stumble upon this problem before ? Has anyone solved it ?

  EDIT :

  It seems that TMPGEnc uses a defective x264 implementation. The mediastreamvalidator tool from Apple returned an error stating that our TS segment "does not contain any IDR access unit with a SPS and a PPS" - which it does actually, but obviously in the wrong places if that somehow matters.

• get specific metadata with ffprobe

  1er mai, par mikem

  I'm having a terrible time getting one single line of metadata from ffprobe.

  


  I'm running this command :

  


  


  ffprobe -show_entries 'stream_tags :
format_tags=com.apple.quicktime.creationdate' -loglevel error
IMG_9931.MOV

  


  


  And I get this output

  


  


  [STREAM]

  


  TAG:creation_time=2022-05-14T20:24:55.000000Z

  


  TAG:language=und

  


  TAG:handler_name=Core Media Video

  


  TAG:encoder=H.264

  


  [/STREAM]

  


  [STREAM]

  


  TAG:creation_time=2022-05-14T20:24:55.000000Z

  


  TAG:language=und

  


  TAG:handler_name=Core Media Audio

  


  [/STREAM]

  


  [STREAM]

  


  TAG:creation_time=2022-05-14T20:24:55.000000Z

  


  TAG:language=und

  


  TAG:handler_name=Core Media Metadata

  


  [/STREAM]

  


  [STREAM]

  


  TAG:creation_time=2022-05-14T20:24:55.000000Z

  


  TAG:language=und

  


  TAG:handler_name=Core Media Metadata

  


  [/STREAM]

  


  [STREAM]

  


  TAG:creation_time=2022-05-14T20:24:55.000000Z

  


  TAG:language=und

  


  TAG:handler_name=Core Media Metadata

  


  [/STREAM]

  


  [FORMAT]

  


  TAG:com.apple.quicktime.creationdate=2022-05-14T16:24:55-0400

  


  [/FORMAT]

  


  


  But the only thing I want returned is

  


  


  com.apple.quicktime.creationdate=2022-05-14T16:24:55-0400

  


  


  I've searched and searched but I can't find any examples of pulling a single specific value of metadata.

  


  In actuality, I really just want the value of com.apple.quicktime.creationdate... ie "2022-05-14T16:24:55-0400"

  


  I know I can grep and awk my way through it, but it seems like there should be a way to do it with ffprobe alone given all of the options it has. I just can't figure out how.

  


  How can I do this ? Any help would be appreciated.