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Sur d’autres sites (8376)

  • 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();


    


  • h264_qsv is choppy when live streaming [closed]

    10 septembre 2023, par Devin Dixon

    I am trying to do live streaming of video games using h264_qvs, but is choppy when compared to libx264. Here are some variations of the ffmpeg command I am running :

    


    Variation 1

    


    ffmpeg.exe -y  -hwaccel qsv -i pipe:0 -vf "hwdownload,format=nv12" -c:v h264_qsv -video_size 1920x1080 -preset veryfast  -global_quality 35 -look_ahead 0 -b:v 9000k -maxrate 12000k -bufsize 9000k -pix_fmt yuv420p -r 60 -g 120 -c:a aac -b:a 256k -ac 2 -ar 44100  -af afftdn -f tee -map 0 "[f=flv]rtmp://endpoint.example.com|[f=mp4]C\:\\Users\\me\\savedFile.mp4"


    


    Variation 2 : Moved the scale inside the vf

    


    ffmpeg.exe -y  -hwaccel qsv -i pipe:0 -vf "hwdownload,format=nv12,scale=1920:1080" -c:v h264_qsv -preset veryfast  -global_quality 35 -look_ahead 0 -b:v 9000k -maxrate 12000k -bufsize 9000k -pix_fmt yuv420p -r 60 -g 120 -c:a aac -b:a 256k -ac 2 -ar 44100  -af afftdn -f tee -map 0 "[f=flv]rtmp://endpoint.example.com|[f=mp4]C\:\\Users\\me\\savedFile.mp4"


    


    Variation 3 : Using scale_qsv and removed -pix_fmt yuv420p

    


    ffmpeg.exe -y  -hwaccel qsv -i pipe:0 -vf "hwdownload,format=nv12,vpp_qsv=framerate=60,scale_qsv=w=1920:height=1080" -c:v h264_qsv -preset veryfast  -global_quality 35 -look_ahead 0 -b:v 9000k -maxrate 12000k -bufsize 9000k  -r 60 -g 120 -c:a aac -b:a 256k -ac 2 -ar 44100  -af afftdn -f tee -map 0 "[f=flv]rtmp://endpoint.example.com|[f=mp4]C\:\\Users\\me\\savedFile.mp4"


    


    Variation 4 : Best Variation but still subpar to libx264, lag is 1 minute 30 seconds

    


    ffmpeg.exe -y  -hwaccel qsv -i pipe:0 -vf "vpp_qsv=framerate=60,scale_qsv=w=1920:h=1080" -c:v h264_qsv  -preset veryfast  -global_quality 25 -look_ahead 1 -b:v 9000k -maxrate 12000k -bufsize 9000k  -g 120 -c:a aac -b:a 256k -ac 2 -ar 44100 -f tee -map 0 "[f=flv]rtmp://endpoint.example.com|[f=mp4]C\:\\Users\\me\\savedFile.mp4"


    


    But no matter how I change it, the streaming is choppyl start/stop. What else shoud I be testing here for performance ?

    


  • Build FFMPEG with x264 for Android

    26 mai 2023, par Kage

    I am trying to build FFMPEG with libx264 for Android.

    



    I can successfully build and use FFMPEG for Android but I realized that I need the ability to encode, therefore I am trying to build FFMPEG with x264.

    



    I am using this tutorial to build FFmpeg for Android http://www.roman10.net/how-to-build-ffmpeg-for-android/

    



    When trying to build FFMPEG I get an error :

    



    


    "ERROR : libx264 not found"

    


    



    And in my log it says :

    



    


    "/usr/local/lib/libx264.a : could not read symbols : Archive has no
 index ; run ranlib to add one..."

    


    



    I have the latest versions of both FFMPEG and x264.
I understand that FFMPEG looks for the header and libraries in usr/lib and usr/include, so in order to make it find x264 I use the cflags and ldflags :

    



      

    • —extra-cflags = " -I/usr/local/include "

      • 


    • —extra-ldflags = " -L/usr/local/lib "

      • 


    



    I have tried building x264 with many different options that other people on the internet have said that i need. eg. —enable-shared, —enable-static, —disable-pthreads etc.
Some forums say enable this, others say no disable that.

    



    Any help would be much appreciated,
Thanks

    



    EDIT :

    



    If I build FFmpeg with the simplest commands to include libx264 then it works.
ie.

    



    ./configure --enable-gpl --enable-libx264 --extra-cflags="-I/usr/local/include" --extra-ldflags="-L/usr/local/lib" --enable-static --enable-shared


    



    However I need it to work for Android. The script I am using is :

    



    NDK=~/Desktop/android-ndk-r7
PLATFORM=$NDK/platforms/android-8/arch-arm/
PREBUILT=$NDK/toolchains/arm-linux-androideabi-4.4.3/prebuilt/darwin-x86
function build_one
{
./configure --target-os=linux \
    --prefix=$PREFIX \
    --enable-cross-compile \
    --enable-shared \
    --enable-static \
    --extra-libs="-lgcc" \
    --arch=arm \
    --cc=$PREBUILT/bin/arm-linux-androideabi-gcc \
    --cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \
    --nm=$PREBUILT/bin/arm-linux-androideabi-nm \
    --sysroot=$PLATFORM \
    --extra-cflags=" -O3 -fpic -DANDROID -DHAVE_SYS_UIO_H=1 -Dipv6mr_interface=ipv6mr_ifindex -fasm -Wno-psabi -fno-short-enums -fno-strict-aliasing -finline-limit=300 $OPTIMIZE_CFLAGS -I/usr/local/include" \
    --extra-ldflags="-Wl,-rpath-link=$PLATFORM/usr/lib -L $PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog -L/usr/local/lib " \
    --enable-gpl \
    --enable-libx264 \
    --disable-everything \
    --enable-demuxer=mov \
    --enable-demuxer=h264 \
    --disable-ffplay \
    --enable-protocol=file \
    --enable-avformat \
    --enable-avcodec \
    --enable-decoder=rawvideo \
    --enable-decoder=mjpeg \
    --enable-decoder=h263 \
    --enable-decoder=mpeg4 \
    --enable-decoder=h264 \
    --enable-encoder=mjpeg \
    --enable-encoder=h263 \
    --enable-encoder=mpeg4 \
    --enable-encoder=h264 \
    --enable-parser=h264 \
    --disable-network \
    --enable-zlib \
    --disable-avfilter \
    --disable-avdevice \
    $ADDITIONAL_CONFIGURE_FLAG

make clean
make  -j4 install
$PREBUILT/bin/arm-linux-androideabi-ar d libavcodec/libavcodec.a inverse.o
$PREBUILT/bin/arm-linux-androideabi-ld -rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib  -soname libffmpeg.so -shared -nostdlib  -z,noexecstack -Bsymbolic --whole-archive --no-undefined -o $PREFIX/libffmpeg.so libavcodec/libavcodec.a libavformat/libavformat.a libavutil/libavutil.a libswscale/libswscale.a -lc -lm -lz -ldl -llog  --warn-once  --dynamic-linker=/system/bin/linker $PREBUILT/lib/gcc/arm-linux-androideabi/4.4.3/libgcc.a
}

CPU=armv7-a
OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=$CPU "
PREFIX=./android/$CPU
ADDITIONAL_CONFIGURE_FLAG=
build_one


    



    I am guessing that some option in my configure command is conflicting with enabling libx264

    



    NOTE : If I remove —enable-libx264 then it works

    


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