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• Add multiple metadata in video using ffmpeg command

  19 janvier 2019, par Raghbendra Nayak

  Command to add single metadata working fine

  ffmpeg -i '/var/www/html/public/uploads/wp-video/akka.mov' -metadata kKeyContentIdentifier='com.apple.quicktime.content.identifier' '/var/www/html/public/uploads/video-thumb/updated-akka.mov'

  Add multiple metadata command, I pass the multiple metadata tag like below

  ffmpeg -i '/var/www/html/public/uploads/wp-video/akka.mov' -metadata kKeyContentIdentifier='com.apple.quicktime.content.identifier' -metadata kKeyStillImageTime = 'com.apple.quicktime.still-image-time' -metadata kKeySpaceQuickTimeMetadata = 'mdta' '/var/www/html/public/uploads/video-thumb/updated-akka.mov'

  Its not working, is there any other way to pass multiple metadata in command ?

• ffmpeg : mute first 2 seconds in all audio streams

  10 avril 2015, par Tony

  Looking to edit a blip out of the beginning of a video/audio file :

  • How can I use ffmpeg to only edit the first two seconds of the clip so that there’s no longer that blip in the audio ?

  • How do I ensure that all 7 audio tracks are affected by the audio filter ?

  • How do I ensure that all 7 are also present in my output file in the same input specs ?

  Complete output :

  ffmpeg -i ~/Downloads/in.mov  -vcodec copy -acodec pcm_s24le -q:a 0 -af "volume=enable='between(t,0,3)':volume=0"  ~/Downloads/out2.mov
  
  ffmpeg version 2.6.1 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with Apple LLVM version 6.0 (clang-600.0.57) (based on LLVM 3.5svn)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/2.6.1 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-vda
  
    libavutil      54. 20.100 / 54. 20.100
  
    libavcodec     56. 26.100 / 56. 26.100
  
    libavformat    56. 25.101 / 56. 25.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 11.102 /  5. 11.102
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Guessed Channel Layout for  Input Stream #0.1 : mono
  
  Guessed Channel Layout for  Input Stream #0.2 : mono
  
  Guessed Channel Layout for  Input Stream #0.3 : mono
  
  Guessed Channel Layout for  Input Stream #0.4 : mono
  
  Guessed Channel Layout for  Input Stream #0.5 : mono
  
  Guessed Channel Layout for  Input Stream #0.6 : mono
  
  Guessed Channel Layout for  Input Stream #0.7 : stereo
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '~/Downloads/in.mov':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 537199360
  
      compatible_brands: qt  
  
      creation_time   : 2014-01-16 18:02:27
  
    Duration: 00:00:06.44, start: 0.000000, bitrate: 119128 kb/s
  
      Stream #0:0(eng): Video: prores (apch / 0x68637061), yuv422p10le(bt709), 1920x1080, 109843 kb/s, SAR 1:1 DAR 16:9, 29.97 fps, 29.97 tbr, 2997 tbn, 2997 tbc (default)
  
      Metadata:
  
        creation_time   : 2014-01-16 18:02:27
  
        handler_name    : Apple Alias Data Handler
  
        encoder         : Apple ProRes 422 (HQ)
  
        timecode        : 01:00:00;00
  
      Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-01-16 18:02:27
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:2(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-01-16 18:02:27
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:3(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-01-16 18:02:27
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:4(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-01-16 18:02:27
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:5(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-01-16 18:02:27
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:6(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-01-16 18:02:27
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:7(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 2 channels, s32 (24 bit), 2304 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-01-16 18:02:27
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:8(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-01-16 18:02:28
  
        handler_name    : Apple Alias Data Handler
  
        timecode        : 01:00:00;00
  
  File '~/Downloads/out2.mov' already exists. Overwrite ? [y/N] y
  
  Output #0, mov, to '~/Downloads/out2.mov':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 537199360
  
      compatible_brands: qt  
  
      encoder         : Lavf56.25.101
  
      Stream #0:0(eng): Video: prores (apch / 0x68637061), yuv422p10le, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 109843 kb/s, 29.97 fps, 29.97 tbr, 11988 tbn, 2997 tbc (default)
  
      Metadata:
  
        creation_time   : 2014-01-16 18:02:27
  
        handler_name    : Apple Alias Data Handler
  
        encoder         : Apple ProRes 422 (HQ)
  
        timecode        : 01:00:00;00
  
      Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, stereo, s32 (24 bit), 2304 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-01-16 18:02:27
  
        handler_name    : Apple Alias Data Handler
  
        encoder         : Lavc56.26.100 pcm_s24le
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #0:7 -> #0:1 (pcm_s24le (native) -> pcm_s24le (native))
  
  Press [q] to stop, [?] for help
  
  frame=  193 fps=109 q=-1.0 Lsize=   88166kB time=00:00:06.43 bitrate=112155.7kbits/s    
  
  video:86349kB audio:1811kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.006946%

• Playing video with transparency in iOS

  14 juillet 2020, par 0Ds0

  A bit of background, i want to play videos with transparency on the web converted from gifs, for all non apple devices i can easily export a webm file like so

  


  ffmpeg -i test.gif -c:v libvpx-vp9 -qmin 0 -qmax 18 -crf 9 -b:v 1400K -quality good -cpu-used 0 -auto-alt-ref 0 -pix_fmt yuva420p -an -sn  -metadata title="test webm" test.webm

  


  No need for video streaming with HTTP response 206 partial content loaded it works out of the box

  


  Now for safari and apple devices i am presented with a totally different beast i set up a endpoint that serves the video with HTTP 206 responses and after a quite a struggle i can have the same end result for Safari in macOSX, and i convert the videos like so

  


  ffmpeg -i test.gif -qmin 0 -qmax 18  -vcodec prores_ks -q:v 64 -b:v 1400K  -pix_fmt yuva444p10le -profile:v 4444 -an -sn -metadata title="test mov" test.mov

  


  I put in the url address bar the that serves the video with stream and the video plays with transparency all good.

  


  Now on Safari in iOS the video just does not play, it is loaded with the same endpoint and other videos without transparency also work, serving from the same stream endpoint.

  


  Does anyone knows of a solution to encode a video with transparency that plays on all apple devices ?

  


  I also gave handbrake a try without success, actually could not even get the transparency right with handbrake.