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• FFMPEG Cannot Open The Video File (C#)

  5 décembre 2016, par Landon Conway

  I want to make a software that can read a video file and extract all the frames to get them as bitmaps so I choose to use AForge FFMPEG. However, it does not seem to be working for me as it does for others ! When I try to use ’VideoFileReader.Open’ I get this exeption :

  "An unhanded exeption of type ’System.IO.IOExeption’ occurred in AForge.Video.FFMPEG.dll

  Additional Information : Cannot open the file."

  Regardless of which video file I try to open it does not work. I also tried to run as andministrator since it may not have access to that file.

  I’m using .NET Framework 4.6.1

  Here is my code :

  using AForge.Video.FFMPEG;
  
  using System;
  
  using System.Drawing;
  
  using System.IO;
  
  using System.Windows.Forms;
  
  namespace Test_Video_Software
  
  {
  
      public partial class
  
      {
  
          public Form1
  
          {
  
              InitializeComponent();
  
          }
  
          private void takeApartToolStripMenuItem_Click(object sender, EventArgs e)
  
          {
  
              VideoFileReader vfr = new VideoFileReader();
  
              vfr.Open(@"C:\Users\LC Creations\Videos\IMG_8722.MOV");
  
              Bitmap videoFrame = vfr.ReadVideoFrame();
  
          }
  
      }
  
  }

  I looked everywhere on the internet. Even here of coarse. Nobody seems to have had this issue in the past. Any help apreciated.

• lavf/segment : fix crash when failing to open segment list

  21 janvier 2017, par Rodger Combs

  lavf/segment : fix crash when failing to open segment list
  This happens because segment_end() returns an error, so seg_write_packet
  
  never proceeds to segment_start(), and seg->avf->pb is never re-set,
  
  so we crash with a null pb when av_write_trailer flushes the packet
  
  queue.
  This doesn’t seem to be clearly recoverable, so I’m just failing more
  
  gracefully.
  Repro :
  
  ffmpeg -i input.ts -f segment -c copy -segment_list /noaxx.m3u8 test-%05d.ts
  (assuming you don’t have write access to /)
  

  • [DH] libavformat/segment.c

• Python get wav frames from mp3 file for wave.open -> readframes()

  25 janvier 2017, par spam junk

  I have programmed a little lightshow which reads from .wav files :

  data = wavfile.readframes(chunk)

  but i would like to read mp3 files.

  So i have found various python apis like pymedia (cant quite get it to work) and pyffmpeg (never been worked on since 2015 as the github readme says )
  and i have found this post :

  Python : mp3 to alsaaudio through ffmpeg pipe and wave.open(f,’r’)

  im new to python and im only using it because my lights are controlled in python and im studying
  computer science since last year , so im still learning

  so all in all if someone could reassemble the code from the post for me that would be nice .

  im sorry,
  i would comment on the post but i dont have enough reputation