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• lavf/movenc : enable dvh1 FourCC

  5 février 2023, par Damiano Galassi

  lavf/movenc : enable dvh1 FourCC
  This is required to pass through Dolby Vision metadata to x265.
  
  Profiles 5 and 8 require the "dvh1" fourCC :
  
  https://professional.dolby.com/siteassets/content-creation/dolby-vision-for-content-creators/dolby-vision-streams-within-the-http-live-streaming-format-v2.0-13-november-2018.pdf#unique_10
  
  https://professional.dolby.com/siteassets/content-creation/dolby-vision-for-content-creators/dolbyvisioninmpegdashspecification_v2_0_public_20190107.pdf#unique_13
  
  https://professional.dolby.com/siteassets/content-creation/dolby-vision-for-content-creators/dolby_vision_bitstreams_within_the_iso_base_media_file_format_dec2017.pdf
  See also https://github.com/HandBrake/HandBrake/pull/4838 for more
  
  details.
  Fixes : https://trac.ffmpeg.org/ticket/10257
  

  • [DH] libavformat/movenc.c

• How to merge multiple videos and audios in python ffpmeg [closed]

  18 décembre 2020, par Alireza Farzaneh

  I'm making a program for downloading Adobe connect based meetings' recordings using python.
I have managed to download Adobe connect sessions' recording.
  
Now I have multiple separate audios and videos.
  
I'm trying to merge them into one video using python and ffmpeg library.
  
The problem is that I want them to be in sync.
  

  
Here is an example :
  
I have four files :

  "cameraVoip_0_4.flv" : audio, started at "Sat Nov 07 13:36:11 2020" and lasted for 2888.128000 seconds.

  "cameraVoip_0_6.flv" : audio, started at "Sat Nov 07 14:26:42 2020" and lasted for 366.455 seconds.

  "screenshare_1_2.flv" : video, started at "Sat Nov 07 13:36:01 2020" and lasted for 2844.602000 seconds.

  "screenshare_3_7.flv" : video, started at "Sat Nov 07 14:26:51 2020" and lasted for 352.635000 seconds.


  
I want to merge them somehow that their timing would be correct.

  


• How to automaitcally install ffmepg in c#

  25 janvier 2021, par user14527374

  so I am writing a c# application which uses ffmpeg to upscale videos. Currently, it checks if ffmpeg is installed, and if not, prompts the user to install it.

  


  {
        if (File.Exists(@"C:\ffmpeg-2020-12-27-git-bff6fbead8-full_build\bin\ffmpeg.exe"))
        {
            
        MessageBox.Show("Please note that this will only upsalce a video, it will not remaster it. Program C 2020 Keifmeister Technologies. Aka this will clear up the image but not upgrade character models or anything. Cheers.");
    }
    else
    {
        MessageBox.Show("You need to have ffmpeg installed, and you do not. Opening download link, please extract the downloaded zip file to root of yout c:\\ drive. Thanks.");
        Process.Start("https://github.com/GyanD/codexffmpeg/releases/download/2020-12-27-git-bff6fbead8/ffmpeg-2020-12-27-git-bff6fbead8-full_build.zip");
    }
}


  


  I am wondering, is there instead a way to install ffmpeg automatically and print its install location as a string ? Thanks very much.