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• UWP run ffmpeg process to capture

  16 février 2018, par InspiracvionV

  I’m developing a UWP app with C# and I need to start FFmpeg in a process.

  I use this ffmpeg command which works good in CMD :

  D :\ffmpeg.exe -f dshow -crossbar_video_input_pin_number 1 -i
  video="AVerMedia BDA Analog Capture" -vcodec rawvideo -pix_fmt yuv420p
  -s 864x768 -r 10 "D :\capture\output.yuv" -loglevel 16

  But when I start the process with the same command and arguments in my UWP app I get this error from ffmpeg :

  [dshow @ 000001bd43907e80] Unable to BindToObject for AVerMedia BDA
  Analog Capture [dshow @ 000001bd43907e80] Could not find video device
  with name [AVerMedia BDA Analog Capture] among source devices of type
  video. video=AVerMedia BDA Analog Capture : I/O error

  This is my code :

          string filename = @"D:\ffmpeg.exe";
  
          string arg = " -f dshow -crossbar_video_input_pin_number [VIDEOPIN] -i video=\"AVerMedia BDA Analog Capture\" -vcodec rawvideo -pix_fmt [PIXELCONF] -s [SIZE] -r [FPS] \"[FOLDER]\\[VIDEONAME]\" -loglevel 16";
  
          arg = path.Text;
  
          if (!File.Exists(filename))
  
              System.Diagnostics.Debug.WriteLine("Not exist ffmpeg");
  
  
  
  
  
  
  
          arg = arg.Replace("[VIDEOPIN]", "1");
  
          arg = arg.Replace("[VIDEODEVICE]", "AVerMedia BDA Analog Capture");
  
          arg = arg.Replace("[PIXELCONF]", "yuv420p");
  
          arg = arg.Replace("[SIZE]", "864x768");
  
          arg = arg.Replace("[FPS]", "10");
  
          arg = arg.Replace("[FOLDER]", "D:\\capture");
  
          arg = arg.Replace("[VIDEONAME]", "output.yuv");
  
  
  
          ProcessStartInfo pi = new ProcessStartInfo(filename, arg);
  
          System.Diagnostics.Debug.WriteLine(pi.FileName + " " + pi.Arguments.ToString());
  
          pi.RedirectStandardInput = true;
  
          pi.RedirectStandardOutput = true;
  
          pi.RedirectStandardError = true;
  
          pi.UseShellExecute = false;
  
  
  
          pi.CreateNoWindow = true;
  
          process = new Process();
  
          process.StartInfo = pi;
  
          process.EnableRaisingEvents = true;
  
          process.OutputDataReceived += new DataReceivedEventHandler(MyProcOutputHandler);
  
          process.ErrorDataReceived += new DataReceivedEventHandler(MyProcErrorHandler);
  
          process.Exited += new EventHandler(ExitedProcess);
  
  
  
  
  
  
  
          process.Start();
  
          process.BeginErrorReadLine();
  
          process.BeginOutputReadLine();

  EDIT : This is what i have with :

  ffmpeg -list_devices true -f dshow -i dummy

  ffmpeg version N-90054-g474194a8d0 Copyright (c) 2000-2018 the FFmpeg
  developers built with gcc 7.2.0 (GCC) configuration : —enable-gpl
  —enable-version3 —enable-sdl2 —enable-bzlib —enable-fontconfig —enable-gnutls —enable-iconv —enable-libass —enable-libbluray —enable-libfreetype —enable-libmp3lame —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libopenjpeg —enable-libopus —enable-libshine —enable-libsnappy —enable-libsoxr —enable-libtheora —enable-libtwolame —enable-libvpx —enable-libwavpack —enable-libwebp —enable-libx264 —enable-libx265 —enable-libxml2 —enable-libzimg —enable-lzma —enable-zlib —enable-gmp —enable-libvidstab —enable-libvorbis —enable-libvo-amrwbenc —enable-libmysofa —enable-libspeex —enable-libxvid —enable-libmfx —enable-amf —enable-cuda —enable-cuvid —enable-d3d11va —enable-nvenc —enable-dxva2 —enable-avisynth libavutil 56. 7.101 / 56. 7.101 libavcodec 58. 11.101 / 58. 11.101 libavformat 58. 9.100 / 58. 9.100 libavdevice 58. 1.100 / 58. 1.100 libavfilter 7. 12.100 / 7. 12.100 libswscale 5. 0.101 / 5. 0.101 libswresample 3. 0.101 / 3. 0.101 libpostproc 55. 0.100 / 55. 0.100 [dshow @ 0000029065b07940] DirectShow video devices (some may be both video and audio devices) [dshow @ 0000029065b07940]
  "AVerMedia BDA Analog Capture" [dshow @ 0000029065b07940] Alternative
  name
  "@device_pnp_~?\pci#ven_1a0a&dev_6202&subsys_620f1461&rev_01#4&3632f028&0&00e6#65e8773d-8f56-11d0-a3b9-00a0c9223196ca465100-deb0-4d59-818f-8c477184adf6"
  [dshow @ 0000029065b07940] "AVerMedia BDA Analog Capture Secondary"
  [dshow @ 0000029065b07940] Alternative name
  "@device_pnp_~?\pci#ven_1a0a&dev_6202&subsys_620f1461&rev_01#4&3632f028&0&00e6#65e8773d-8f56-11d0-a3b9-00a0c9223196ede957b0-eaa5-4bf4-acf3-6e10cb4836c3"
  [dshow @ 0000029065b07940] DirectShow audio devices [dshow @
  0000029065b07940] Could not enumerate audio only devices (or none
  found). dummy : Immediate exit requested

• Real-Time Buffer Too Full (FFMPEG)

  25 janvier 2018, par Nimble

  So I’ve been having this issue with ffmpeg, it has been a journey getting the hardware and command to actually do what I want, but I still have one problem.

  Sometimes when I’m recording I just start dropping frames like crazy, this can be after an hour of recording or even ten hours in... Everything will be working fine and then suddenly I’ll start dropping frames due to "real-time buffer too full or near too full". This happens regardless of how low I put the bitrate, and the buffer size is high as it will allow, eventually I’ll just start dropping frames. Almost seems like it could be like a power saving feature kicking in but it’s too inconsistent it seems. Like I said sometimes I can go 10 hours without having this issue.

  Any ideas ?

  Here is my block of code :

  ffmpeg -guess_layout_max 0 -y -f dshow -video_size 3440x1440 -rtbufsize 2147.48M -pixel_format nv12 -framerate 200 ^
  
  -i video="Video (00 Pro Capture HDMI 4K+)":audio="SPDIF/ADAT (1+2) (RME Fireface UC)" -map 0:0,0:1 -map 0:1 ^
  
  -preset: llhp -codec:v h264_nvenc -pix_fmt nv12 -b:v 250M -maxrate:v 250M -minrate:v 250M -bufsize:v 250M -b:a 320k ^
  
  -ac 2 -r 100 -async 1 -vsync 1 -segment_time 600 -segment_wrap 9 -f segment C:\Users\djcim\Videos\PC\PC%02d.mp4 ^
  
  -guess_layout_max 0 -f dshow -rtbufsize 2000M -i audio="Analog (3+4) (RME Fireface UC)" -map 1:0 -b:a 320k -ac 2 ^
  
  -af "adelay=200|200" -segment_time 600 -segment_wrap 9 -f segment C:\Users\djcim\Videos\PC\Voices\Theirs\TPC%02d.wav ^
  
  -guess_layout_max 0 -f dshow -rtbufsize 2000M -i audio="Analog (5+6) (RME Fireface UC)" -map 2:0 -b:a 320k -ac 2 ^
  
  -af "adelay=825|825" -segment_time 600 -segment_wrap 9 -f segment C:\Users\djcim\Videos\PC\Voices\Mine\MPC%02d.wav

  Here is the error, it repeated around 300 times before locking up ffmpeg forcing my to quit before starting the recording again :

  [dshow @ 0000019a596bdcc0] real-time buffer [Video (00 Pro Capture HDMI 4K+)] [video input] too full or near too full (62% of size: 2147480000 [rtbufsize parameter])! frame dropped!

• Encoding 4K 60Hz lossless from a capture card

  13 décembre 2017, par Alex Pizzi

  Windows 10 64-bit
  Ryzen 7
  GTX 1080
  32GB RAM

  Hi all,

  I’m trying to encode 4K 30/60Hz video in a lossless format from a 4K capture card and everything I’ve tried gives me a similar error as in the linked image, [real-time buffer too full or near too full frame dropped]

  [Not mine]
  https://cloud.githubusercontent.com/assets/4932401/22171307/ef5c9864-df58-11e6-8821-4b74ce3f32d0.png

  This is the command I’ve tried most recently :

  ffmpeg.exe -f dshow -video_size 3840x2160 -framerate 30 -pixel_format bgr24 -rtbufsize INT_MAX -i video="MZ0380 PCI, Analog 01 Capture" -vf fps=30 out%d.BMP

  With the images dumped to a 10G RAM disk or 850 EVO. I’m doing this to skip the encoding step.

  I get the same error when encoding with h265 lossless and NVENC h265 lossless.

  I need the video to be lossless as it will be used to test hardware h265 encoders.

  Video source is a 4K Blu-ray.

  Any help would be greatly appreciated. Thank you.

  -Alex P