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• DIY video file streaming from linux/osx to iOS devices

  27 septembre 2016, par sfactor

  This is for a hobby project. I want to learn about video streaming and also create something that’s useful for me as well.

  The project should be able to run a server on my macbook and a client on my iPad that will allow me to watch the videos I’ve got stored on my laptop without having to copy them in my iPad over my wifi.

  I know there are solutions like Plex, Air Video etc. that allow me to do it. But since my goal is to practice writing some client/server code, I want to create something myself with the basic functionality of these apps.

  I figured I’d probably need something like ffmpeg and Apple’s HTTP Live Streaming (HLS), but I don’t have a Apple developer account to be able to use it. I do have Xcode in my mac. So, some free 3rd party library for HLS or something equivalent. I also fond this tool called https://www.bento4.com.

  How would I go about getting started with such an application and what are the libraries I could use to accomplish this ?

• FFMPEG : Need to mix dow multiple audio stream to single stereo

  17 avril 2018, par Serge Dumoulin

  I have an input file with 2 stereo stream of audio.
  I am trying to create an output wav file with the audio mixdown :
  first stereo stream mixdown to left channel of a single stereo stream
  Second stereo stream mixdown to right channel of the same stereo stream.
  So output file have only one stereo stream.
  I have tried different things but its not clear how to manage streams and channels inside them. Found no example on how to do this.

  I’ve tried playing with -filter_complex , amix, and amerge filters, as well as the -map parameter, but I can’t seem to find the right combination of values.

  Here was my input file looks like :

  Input #0,
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 537199360
  
      compatible_brands: qt  
  
      creation_time   : 2018-03-20T16:48:32.000000Z
  
      com.apple.finalcutstudio.media.uuid: 2BE95371-6901-42C7-AB84-6357F53A4592
  
    Duration: 00:05:40.38, start: 0.000000, bitrate: 32679 kb/s
  
      Stream #0:0(eng): Video: prores (apco / 0x6F637061), yuv422p10le(bt709, progressive), 1920x1080, 29590 kb/s, SAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 23976 tbn, 23976 tbc (default)
  
      Metadata:
  
        creation_time   : 2018-03-20T16:48:32.000000Z
  
        handler_name    : Apple Alias Data Handler
  
        encoder         : Apple ProRes 422 Proxy
  
        timecode        : 09:59:20:00
  
  
  
  Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo, s16, 1536 kb/s (default)
  
      Metadata:
  
        creation_time   : 2018-03-20T16:48:32.000000Z
  
        handler_name    : Apple Alias Data Handler
  
  
  
  Stream #0:2(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo, s16, 1536 kb/s (default)
  
      Metadata:
  
        creation_time   : 2018-03-20T16:48:32.000000Z

• ffmpeg change timecode metadata inside video file

  23 février 2024, par virtualsets

  I have problems to change timecode inside metadata of a video file "mov"

  


   ffmpeg -i input.mov -ss 0 -map 0 -acodec copy -vcodec copy -timecode 01:20:10:00 -metadata:s:2:0 timecode=01:20:10:00 -metadata:s:1:0 timecode=01:20:10:00 -metadata:s:0:2 -metadata:s:0:2  timecode=01:10:10:00 output.mov


  


  I need to put my own timecode to the file but this command not works.

  


  The console give me :

  


    mov @ 00000225287fdc00] You requested a copy of the original timecode track so timecode metadata are now ignored
Output #0, mov, to 'convert_A019_02230134_C186.mov':
  Metadata:
    major_brand     : qt  
    minor_version   : 537199360
    compatible_brands: qt  
    timecode        : 01:20:10:00
    encoder         : Lavf58.11.101
    Stream #0:0(eng): Video: prores (apcn / 0x6E637061), yuv422p10le(bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 122315 kb/s, 25 fps, 25 tbr, 12800 tbn, 25 tbc (default)
    Metadata:
      creation_time   : 01:10:10:00
      handler_name    : ?Apple Alias Data Handler
      encoder         : Apple ProRes 422
      timecode        : 01:10:10:00
    Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, stereo, s32 (24 bit), 2304 kb/s (default)
    Metadata:
      creation_time   : 2020-02-23T00:34:02.000000Z
      handler_name    : ?Apple Alias Data Handler
      timecode        : 01:20:10:00
    Stream #0:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
    Metadata:
      creation_time   : 2020-02-23T00:34:02.000000Z
      handler_name    : ?Apple Alias Data Handler
      timecode        : 01:20:10:00
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
  Stream #0:2 -> #0:2 (copy)
Press [q] to stop, [?] for help
frame=  467 fps=0.0 q=-1.0 Lsize=  281452kB time=00:00:18.64 bitrate=123693.3kbits/s speed=71.1x    
video:278913kB audio:2531kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.002533%


  


  I don't understand why it does not modify the timecode in the mov file. The old timecode remains.