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• FFMPEG streaming raw H264

  29 avril 2020, par lbasek

  Im currently working on streaming a mp4 file encoded with h264 over TCP and decoding at the mobile side (Android).I successfully manage up connection and streaming h264 raw data but that image quality is too bad (half screen is green or purple and everything is pixelized).I started streaming with :

  



  ffmpeg -re \                                                       
-i test.mp4 \
-vcodec libx264 \
-vf scale=1920:1080 \
-vprofile high \
-preset ultrafast \
-b:v 1M -maxrate 2M -bufsize 2M -pass 1 \
-strict experimental \
-pix_fmt yuv420p \
-tune zerolatency \
-movflags use_metadata_flag \
-movflags empty_moov+default_base_moof+faststart \
-f h264 tcp://10.230.253.241:9090


  



  Result :
Image

  



  Am I on right road and its that possible with raw h264 ? Any advice would welcome ! Thanks

  


• ffmpeg custom compile options with hardware/software support

  14 mars 2023, par Capitalmind

  My last compile enabled nvidia/cuda but even though I included —enable-nonfree in the configure, I had issues encoding videos, with outputs like :

  


  ffmpeg -hwaccel cuvid -c:v h264_cuvid -resize 1920x1080 -i Input.mkv -c:a copy -c:v h264_nvenc -preset slow -rc vbr_hq -cq 18 Output.mkv

  


  Giving errors like :

  


  ffmpeg -hwaccel cuvid -c:v h264_cuvid -resize 1920x1080 -i /media/zuultux/Video/Movies/Lawrence.of.Arabia.1962.UHD.BluRay.2160p.TrueHD.Atmos.7.1.HEVC.mkv -c:a copy -c:v h264_nvenc -preset slow -rc vbr_hq -cq 18 /media/zuultux/Video/Lawrence.of.Arabia.1962.UHD.BluRay.1080p.TrueHD.Atmos.7.1.HEVC.mkv


  


  [hevc_cuvid @ 0x5624718179c0] Codec hevc_cuvid is not supported.
Stream mapping:
  Stream #0:0 -> #0:0 (hevc (hevc_cuvid) -> h264 (h264_nvenc))
  Stream #0:1 -> #0:1 (copy)


  


  My actual configure reads :

  


  ./configure --enable-nonfree --enable-cuda-nvcc --enable-libnpp --extra-cflags=-I/usr/local/cuda/include --extra-ldflags=-L/usr/local/cuda/lib64


  


  There a heaps of options on Githhub. Can anyone suggest how to include parameters that specifically :

  


  

  • Toggle enable AMD64/Nvidia or non-hardware processing

  


  • All free and non-free codecs, but particularly VC9, H264/265

  


  • Or basically enable as many features as possible !

  


  


  Note I already have ubuntu-restricted-extras installed.

  


  Configuration used compiled correctly but gave errors when using. Several media files selected to test. nvidia-smi command responds NVIDIA-SMI 470.161.03 Driver Version : 470.161.03 CUDA Version : 11.4

  


  ---

  


  Edit

  


  After fixing the problem I thought to share my results on Github. https://github.com/Capitalmind/makeffmpeg

  


• How to list all audio devices that are enabled and present for recording the output audio of the pc ?

  23 juin 2023, par Daniel Lip

  I want to record with ffmpeg later the entire desktop including audio.
I want to make that it will find for me automatic the recording audio device.

  


  I'm using MMDeviceEnumerator.

  


  all the other ways I tried returned empty list returned 0 audio devices. I tried with naudio and ffmpeg

  


  public Form1()
        {
            InitializeComponent();

            InitializeRecordingIndicator();

            MMDeviceEnumerator enumerator = new MMDeviceEnumerator();
            foreach (MMDevice device in enumerator.EnumerateAudioEndPoints(DataFlow.Capture, DeviceState.All))
            {
                StreamWriter w = new StreamWriter(@"d:\audiodev.txt", true);
                cmbAudioDevices.Items.Add(device.FriendlyName);
                w.WriteLine(device.FriendlyName + " " + device.State);
                w.Close();
            }
        }


  


  This is the list of all my audio deviceso n my system.
but they are all not present or disabled. and i have audio on my pc i can hear games videos anything.

  


  so what would i select from this list as audio device for recording the pc output audio ?
or maybe i need to find another way to find the right audio device ?

  


  Front Green In (Realtek(R) Audio) NotPresent
Rear (Realtek(R) Audio) NotPresent
Center (Realtek(R) Audio) NotPresent
Microphone (Realtek(R) Audio) NotPresent
Rear Grey In (Realtek(R) Audio) NotPresent
Side (Realtek(R) Audio) NotPresent
Internal AUX Jack (NVIDIA High Definition Audio) NotPresent
Internal AUX Jack (High Definition Audio Device) NotPresent
Internal AUX Jack (High Definition Audio Device) NotPresent
Rear Pink In (Realtek(R) Audio) NotPresent
Internal AUX Jack (NVIDIA High Definition Audio) NotPresent
Internal AUX Jack (High Definition Audio Device) NotPresent
Internal AUX Jack (NVIDIA High Definition Audio) NotPresent
Front (Realtek(R) Audio) NotPresent
Rear Orange In (Realtek(R) Audio) NotPresent
Line In (Realtek(R) Audio) NotPresent
Front Pink In (Realtek(R) Audio) NotPresent
Line In (Realtek(R) Audio) Unplugged
Internal AUX Jack (High Definition Audio Device) NotPresent
Internal AUX Jack (High Definition Audio Device) NotPresent
Microphone (Realtek(R) Audio) Unplugged
Subwoofer (Realtek(R) Audio) NotPresent
Rear Black In (Realtek(R) Audio) NotPresent
Stereo Mix (Realtek(R) Audio) Disabled
Rear Green In (Realtek(R) Audio) NotPresent
Microphone (Realtek(R) Audio) NotPresent
Rear Blue In (Realtek(R) Audio) NotPresent
Front Green In (Realtek(R) Audio) NotPresent
Rear (Realtek(R) Audio) NotPresent
Center (Realtek(R) Audio) NotPresent
Microphone (Realtek(R) Audio) NotPresent
Rear Grey In (Realtek(R) Audio) NotPresent
Side (Realtek(R) Audio) NotPresent
Internal AUX Jack (NVIDIA High Definition Audio) NotPresent
Internal AUX Jack (High Definition Audio Device) NotPresent
Internal AUX Jack (High Definition Audio Device) NotPresent
Rear Pink In (Realtek(R) Audio) NotPresent
Internal AUX Jack (NVIDIA High Definition Audio) NotPresent
Internal AUX Jack (High Definition Audio Device) NotPresent
Internal AUX Jack (NVIDIA High Definition Audio) NotPresent
Front (Realtek(R) Audio) NotPresent
Rear Orange In (Realtek(R) Audio) NotPresent
Line In (Realtek(R) Audio) NotPresent
Front Pink In (Realtek(R) Audio) NotPresent
Line In (Realtek(R) Audio) Unplugged
Internal AUX Jack (High Definition Audio Device) NotPresent
Internal AUX Jack (High Definition Audio Device) NotPresent
Microphone (Realtek(R) Audio) Unplugged
Subwoofer (Realtek(R) Audio) NotPresent
Rear Black In (Realtek(R) Audio) NotPresent
Stereo Mix (Realtek(R) Audio) Disabled
Rear Green In (Realtek(R) Audio) NotPresent
Microphone (Realtek(R) Audio) NotPresent
Rear Blue In (Realtek(R) Audio) NotPresent
Front Green In (Realtek(R) Audio) NotPresent
Rear (Realtek(R) Audio) NotPresent
Center (Realtek(R) Audio) NotPresent
Microphone (Realtek(R) Audio) NotPresent
Rear Grey In (Realtek(R) Audio) NotPresent
Side (Realtek(R) Audio) NotPresent
Internal AUX Jack (NVIDIA High Definition Audio) NotPresent
Internal AUX Jack (High Definition Audio Device) NotPresent
Internal AUX Jack (High Definition Audio Device) NotPresent
Rear Pink In (Realtek(R) Audio) NotPresent
Internal AUX Jack (NVIDIA High Definition Audio) NotPresent
Internal AUX Jack (High Definition Audio Device) NotPresent
Internal AUX Jack (NVIDIA High Definition Audio) NotPresent
Front (Realtek(R) Audio) NotPresent
Rear Orange In (Realtek(R) Audio) NotPresent
Line In (Realtek(R) Audio) NotPresent
Front Pink In (Realtek(R) Audio) NotPresent
Line In (Realtek(R) Audio) Unplugged
Internal AUX Jack (High Definition Audio Device) NotPresent
Internal AUX Jack (High Definition Audio Device) NotPresent
Microphone (Realtek(R) Audio) Unplugged
Subwoofer (Realtek(R) Audio) NotPresent
Rear Black In (Realtek(R) Audio) NotPresent
Stereo Mix (Realtek(R) Audio) Disabled
Rear Green In (Realtek(R) Audio) NotPresent
Microphone (Realtek(R) Audio) NotPresent
Rear Blue In (Realtek(R) Audio) NotPresent


  


  this is how i tried with naudio but it didn't working it didn't find anything. :

  


  using NAudio.Wave;
...

// Enumerate and list audio input devices
var devices = WaveInEvent.DeviceCount;
for (int deviceId = 0; deviceId < devices; deviceId++)
{
    var deviceInfo = WaveInEvent.GetCapabilities(deviceId);
    Console.WriteLine($"Device ID: {deviceId}, Name: {deviceInfo.ProductName}");
}


  


  before that i tried with ffmpeg but also it didn't return anything :

  


  public static class FFmpegHelper
    {
        public static string[] GetAudioCaptureDevices()
        {
            string ffmpegPath = @"C:\path\to\ffmpeg.exe";
            Process process = new Process();
            process.StartInfo.FileName = ffmpegPath;
            process.StartInfo.Arguments = "-list_devices true -f dshow -i dummy";
            process.StartInfo.UseShellExecute = false;
            process.StartInfo.RedirectStandardError = true;
            process.StartInfo.CreateNoWindow = true;
            process.Start();
            process.WaitForExit();

            string output = process.StandardError.ReadToEnd();
            string[] lines = output.Split('\n');
            var devices = lines.Where(line => line.Contains("audio")).Select(line => line.Trim()).ToArray();
            return devices;
        }
    }


  


  using it :

  


  var audioDevices = FFmpegHelper.GetAudioCaptureDevices();