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radek-k / FFMediaToolkit

FFMediaToolkit is a cross-platform video decoder/encoder library for .NET that uses FFmpeg native libraries. It supports video frames extraction, reading stream metadata and creating videos from bitmaps in any format supported by FFmpeg.
MIT License
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Access violation and heap corruption when disposing MediaFile object #61

Closed mohelwazer closed 3 years ago

mohelwazer commented 3 years ago

Open any video file var mediaFile = MediaFile.Open(videoPath); then I got all the frames using TryReadNextFrame(out ImageData). Then I wanted to dispose the mediaFile after that a heap corruption or access violation happens. I have traced the problem to InputContainer class, OnDisposing() method line marked with ->>>>

protected override void OnDisposing()
{
     Video?.Dispose();

      var ptr = Pointer;
      ffmpeg.avformat_close_input(&ptr);

      // Note: the internal buffer could have changed, and be != avio_ctx_buffer
      if (Pointer->pb != null)
      {
          ffmpeg.av_free(Pointer->pb->buffer);

          ->>>>  ffmpeg.avio_context_free(&Pointer->pb);
      }
}