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• Alternative for Xuggle-Xuggler / FFmpeg in Xamarin Android ?

  21 mai 2016, par Jamie de Jong

  For days I am trying to find a working library that can decode the video stream of the Parrot AR Drone 2.0. The problem is actually that FFmpeg isn’t working in Xamarin Android and the Xuggle-Xuggler is only for Java which makes it really difficult.

  Furthermore, I tried to use FFmpeg, but everytime I got errors like this : DllImport error loading lbavcodec-55': 'dlopen failed: libavcodec-55" not found'. I have seen a lot of possible solutions but nothing works. I also tried to compile some .dll files which contains the FFmpeg source code, but unfortunately the same errors as before.

  I just want create a TCP video stream to "192.168.1.1:5555". After that I want to use a possible decode class/library which could decode the bytes to frames or something like that and put it on the view using a VideoView, so the frames will be shown on the smartphone.

  Has anyone experience with this ? Or does someone know a working library for decoding the TCP video stream of the drone ?

  Thanks.

• Alternative to FFMpegCore ? Combine pngs into a video

  28 novembre 2023, par HelloWorld

  I have a scenario where I want to combine a list of images into a video. I see FFMpegCore is a solution, however, I have limitations to the software I can download onto a private network and need a solution that does not require installation of software.

  


  Repo to the nuget package of FFMpegCore : https://github.com/rosenbjerg/FFMpegCore

  


  class Main
{
   public static void Main(string[] args)
   {
      string[] files = Directory.GetFiles("some path to the png directory");

      // Take this list of files and generate a video from this
      // Example of FFMpegCore would be this
      _ = FFMpeg.JoinImageSequence(output: @"newMp4.mp4", frameRate: 30, images: files);
   }
}


  


  I want to achieve something like this in .NET Core (not Framework).

  


  I tried FFMpeg and got an exception thrown due to not having the FFMPeg executable installed (which I am out of scope to do so, an organization policy)

  


• (Shell) Strange issue with find loop, skips characters if ffmpeg is introduced. Work around ?

  5 janvier 2023, par Nebarik

  My goal here is to write a simple shell script that finds .ogg files in a folder and then does a little ffmpeg check on them one by one. Seems simple, but I'm running into the weirdest bug where it's randomly dropping 0-5 characters from the begining of the filename causing errors.

  


  I stripped my script down and did some testing with some test files and this is what happens if it's not doing ffmpeg.

  


  find . -type f -name '*.ogg' | while read filename
do
echo "${filename}"
done


  


  ./folder/222.ogg
./folder/111.ogg
./folder/333.ogg


  


  Great, perfect, exactly what I want.

  


  Now if I add ffmpeg as a line AFTER the echo I get this :

  


  find . -type f -name '*.ogg' | while read filename
do
echo "${filename}"
ffmpeg -v error -i "${filename}" -f null - 2>${location}/fferror.log
done


  


  ./folder/222.ogg
older/111.ogg
folder/333.ogg


  


  Some extra testing shows the ffmpeg is getting the messed up filename variables. So it must be the find that's acting different after running ffmpeg. With only 3 files it doesnt seem serious, but I intend to run this on many many files. It's chaos.

  


  Has anyone encountered something like this before ? I've tried adding sleep lines everywhere to troubleshoot, no change (also unsustainable for how many files i have). Any ideas to counter act this strange behaviour and get a clean filename everytime ?