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• Creating a recursive ffmpeg converter

  23 novembre 2014, par Joe Healey

  I’m trying to create a script of some sort that will convert any video files it detects within a folder (also scanning subfolders), to an .avi file of the same name, in the same place, then remove the original file. I’ve not really used cmd much for any programming/scripting so I’m stumbling over what I suspect is some pretty simple syntax issues.

  If anyone is familiar with encoding and ffmpeg, please point out whether the encoding options are wrong (I’m stumbling about in the dark at the moment).

  Using this thread, I’m working with something currently resembling :

  dir/b/s *.(mkv|mp4|m4v|wmv) >listing.txt  #Make a list of all the files with certain extensions, for reading.
  
  for /F "delims=;" %%F in (listing.txt) do ffmpeg.exe  -i "%%F" -c:v libx264 -preset slow -crf 20 -c:a libvo_aacenc -b:a 128k "%%~na.avi"
  
  #Then to delete original files
  
  for /F "delims=;" %%F in (listing.txt) do del %%F
  
  del listing.txt

  The first issue I have is that I’d like to be able to populate the list with all the common video types. I’m imagining cmd has some syntax similar to perl string matching e.g. A(B|C) would match AB and AC that I could mimic for matching any video file extension ? (I’ve written it in the code above to illustrate the point but I know it doesn’t work).

  I hope that is enough to try and illustrate what I’m attempting.

• DownloadError : ERROR : WARNING : unable to obtain file audio codec with ffprobe in heroku

  14 mars 2021, par Alvin Ben George

  I ran into a problem when I used heroku

  


  


  discord.ext.commands.errors.CommandInvokeError : Command raised an exception : DownloadError : ERROR : WARNING : unable to obtain file audio codec with ffprobe

  


  


  I am pretty sure that my code is fine because I ran it using my laptop, with ffmpeg, ffprobe and youtube-dl installed.

  


  


  • I installed the buildpack of ffmpeg and youtube-dl in heroku https://github.com/jonathanong/heroku-buildpack-ffmpeg-latest.git, but I couldnt play songs using my bot.

    


  


  • I created a link to my Github account in order to provide the source code, I gave the procfile and requirements and all of them are correct, since I use the same venv

    


  


  • I've searched in help section of heroku and stack overflow for help, but I couldnt find anything valid as they all tell in detail about local installations

    


  


  


  Could someone please look into it and find the solution to this problem ?

  


  Thanks in advance

  


• Separating MPEGTS Multi-queue, Padded Stream with 3 Videos

  13 juin 2022, par nwf1115

  I have output from a Python program that comes out as a single .AVI that contains 3 video streams, however, it seems that they are all combined. The videos are not concatenated, but they are interlaced. The code that produces it is pretty abstract and the only thing I can tell is that they used Gstreamer to combine the videos. I can pick out H.264 encoding and mpegts and output as an .AVI. Using ffprobe on the file I get the following output :

  


  Input #0, mpegts, from 'output.avi':
  Duration: 00:05:00.07, start: 12045.450000, bitrate: 33695 kb/s
  Program 1
    Stream #0:0[0xdd]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(progressive), >1920x1080 [SAR 1:1 DAR 16:9], 15 fps, 15 tbr, 90k tbn, 30 tbc


  


  I'm needing to separate the videos contained in this .AVI file, but I'm having trouble doing so using ffmpeg since there are not separate streams for each video.

  


  Does anyone have any tips on how to do this using ffmpeg or gstreamer ?

  


  Update : Upon further experimentation, it does not seem that the frames are interlaced, rather the stream of data was in some way, combined in some manner.

  


  Update : Video output is an mpegts multiqueue, padded stream. Although it is one file, each video stream embedded in the file has its own port. I can open it in wireshark and view the data stream. I guess this changes my question to : Can you filter this single file containing multiple streams by port ?