Recording audio output i.e. audio from the speakers is a tricky process. You can’t just record it as input detected by the mic because there will be quite a bit of noise in the recording. There are of course ways to do it, and apps that allow you to. We’ve covered how you can record audio from a specific app with Audacity however, this works for a specific app. If you’d like to record any and all system sound, it’s best to use FFMPEG. The tool is a command-line tool and it can be a bit daunting to get started with it but, it’s one of the easiest ways to record system sound.
Before you can start, make sure ‘Stereo Mix’ shows up as a device under sounds.
Download FFMPEG. You can add it to the PATH if you want but it isn’t necessary. Open File Explorer and navigate to the zip file you downloaded. Extract it, and in the extracted folder, go to the ‘bin’ folder. Click inside the location bar in File Explorer and enter ‘cmd’. Tap Enter. This will open a new Command Prompt window that is already in that directory.
Next, open a new File Explorer window and create a folder where you will save the audio file that is created. This folder can be created anywhere you like. You do not have to create it inside the FFMPEG folder. It can be on a different drive or an external drive.
Return to the Command Prompt window, and run the following command.
ffmpeg -list_devices true -f dshow -i dummy
This command will return a list of devices that can record or output audio. This will include speakers, mics, and webcams. In this list, look for the name of the audio device i.e, your speakers that you want to record sound from. Copy it to your clipboard and paste it somewhere you will be able to retrieve it easily. In the screenshot below, the audio device that I’m going to record sound from is called ‘Stereo Mix (Realtek Audio)’.
Now that you have the device name, use the following command to begin the recording. Change the name of the device to whichever you want to record, and the path and name of file to whatever you like. You can also change the file format to a different one that FFMPEG supports.
Command
ffmpeg -f dshow -i audio="Device name" path-to-file\file-name.mp3
Example
ffmpeg -f dshow -i audio="Stereo Mix (Realtek Audio)" C:\Users\fatiw\Desktop\Audio\output.mp3
The recording will begin right away. You can minimize the Command Prompt window if you like but do not close it. When you want to stop the recording, return to the Command Prompt window and tap the Ctrl+C keyboard shortcut.
Open the folder that you specified in the path and you will see the audio file there.
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It’s easy to record your computer microphone with FFmpeg. The only tricky part (although not that tricky) is you just have to know the name of your microphone input.
Before you begin make sure you have FFmpeg added to PATH.
Let’s start by listing your recording devices.
ffmpeg -list_devices true -f dshow -i dummyAmongst other things this will give you something like:
[dshow @ 0000026723b489c0] "Line (3- Steinberg UR44)"
[dshow @ 0000026723b489c0] Alternative name "@device_cm_{33D1A762-90A8-12D0-BD43-00A0C111CE86}\wave_{59B73588-5A74-4E16-A824-48B88GF949B8}"The only thing you need to note is your device name. In this case it is Line (3- Steinberg UR44).
To start the recording you just run the following code:
ffmpeg -f dshow -i audio="Line (3- Steinberg UR44)" -c:a libmp3lame -ar 44100 -b:a 320k -ac 1 output.mp3To stop the recording hit CTRL+C.
-f dshow means “DirectShow” and lets FFmpeg capture audio and video devices, video capture devices, analog tv tuner devices.
-i audio="name_of_your_microphone" is the audio device you wish to record from. Replace name_of_your_microphone with the name of your input device.
-c:a libmp3lame means FFmpeg will encode the audio with LAME MPEG Audio Layer III, also known as the MP3 format.
-ar 44100 tels FFmpeg to record at a sample rate of 44,100 Hz. That is the standard for most audio nowadays unless you intend to use the audio for a video in which case you would use 48,000 Hz.
-b:a 320k is the audio bit rate. The highest support for MP3 is 320 kbit/s. -ac 1 means the audio will be in mono as opposed to stereo streams. This makes sense as most microphones record in mono only.
If you haven’t changed the directory in your command line you can always specify where to save the file. For example C:\output.mp3.
Чтобы записать аудио с динамиков, включая все системные звуки, вам не потребуется микрофон. Для этих целей существует немало программ, среди которых хотелось бы обратить внимание на FFmpeg. Эта продвинутая библиотека для обработки видео- и аудиофайлов может с успехом записывать любые звуки на компьютере, в том числе системные. Несмотря на то что FFmpeg является консольным приложением, захват звука с его помощью не представляет особой сложности.
Скачав архив с программой с сайта ffmpeg.zeranoe.com/builds и распаковав, откройте командную строку и перейдите в расположение исполняемого файла приложения (папка bin).
Теперь вам нужно получить список всех устройств, способных записывать и воспроизводить звук.
Для этого тут же в консоли выполните такую команду:
ffmpeg -list_devices true -f dshow -i dummy
Прокрутив консоль немного вниз, отыщите ваше аудиоустройство в группе «DirectShow audio devices», вам нужно скопировать его имя в прямых кавычках.
Если вдруг название устройства, как в нашем примере, будет нечитаемым, копируйте альтернативное имя, также указанное в прямых кавычках.
Теперь сформируйте и выполните в командной строке такую команду:
ffmpeg -f dshow -i audio=»название-устройства» D:/output.wav
Имя и формат выходного файла может быть произвольным.
Запись начнется сразу после нажатия Enter, чтобы ее прервать и сохранить файл, просто закройте командную строку.
Данный способ позволяет захватывать все звуки, как системные, так и воспроизводимые сторонним программным обеспечением.
For a different approach, you could create dummy sinks, virtual soundcards, loopback devices, etc and use them individually in your apps e. The index of the sink-input i. Is there a feasible solution to record system sound and microphone simultaneously? Of course yes! In this article, we will show you how to record system audio and microphone at the same time on your various devices. You can also pass the device certain parameters that it needs, for instance a webcam might allow you to capture it in x at up to max 5 fps, or allow you to capture at x at 30 fps. When you configure your FFmpeg build, all the supported input devices are enabled by default. I tried the following command line:. Or downloaded and processed as usual, though with a bit of overhead compared to pure on-GPU processing:. Screen capture recorder is a third party downloadable dshow capture source, here as an example. You can set framerate like ffmpeg -f dshow -framerate 7. What should I do to record sound from a given window, app, process in the same quality, what can be heard while it is playing? If you use that without explicitly specifying sample or channel arguments you should get the exact same thing as is being output from the sink. It is also highly portable—it compiles and runs in a wide variety of build environments, machine architectures, and configurations like Linux, Mac OS X, Microsoft Windows, etc. I’ve seen in a similar question , that people suggested «Stereo Mix» — I do not see it on my computer at all. You need to have the tools below installed and the versions used in this tutorial are included as a reference:. The libavdevice library provides the same interface as libavformat. The -t defines the duration of the recording, in this case 20 seconds. Many people are looking for a solution to this problem. This will grab the image from entire desktop. . So, using this environment variable, I ended up with the below combination of commands same as the gist which works for me when using MP3. I can capture mic with another app, but I need the mic audio to be in a different file.
FFMPEG & Screen Capture: How To Record From The Command Line
Under the Listen tab, uncheck ‘Listen to this device’.
Add a comment.
xRobot. The audio capture depends on the device to be used. Audacity is tested on Windows 10 & Windows 11, and may also work on Windows 8.
Audacity has no specific CPU or GPU requirements and should be able to run on any notebook or PC that can run aforementioned operating systems.
In this case, you have to expressly map all needed streams, as the auto mapping will only pick up one audio stream.
Right-click Stereo Mix and select Enable. exe but, i found a simple way of it with the ffplay: Set the system’s output to sound card from Windows sound settings and turn on mono audio option, simply run this code for send the output audio card’s channel 1: ffplay -i input. 0 -f pulse -ac 2 -i 0 -f pulse -ac 2 -i 1 output.
Oct 17, 2023 · It turned out that windows has a new api called WASAPI and it works by allowing you to record the live audio from the computer by re-reouting the stereo output into the input. Nov 27, 2020 · Once you set your source, recording volume and possibly other options, you can issue the complete ffpmpeg command to record sound from a pulseaudio source. Here is the full command that is working for me on Windows 10 Home to get the audio: ffmpeg -f dshow -i audio=»Microphone (Realtek High Definition Audio)» D:\Audio\output. the RecordWindow is the title of a specified window. Quick Answer. In Linux I managed to do it like this: ffmpeg -f pulse -ac 2 -ar 44100 -i alsa_output. Matin Lotfaliee. In other cases, we need the capture from a microphone.
FFmpeg — Free Open Source tool for Video and Audio
If you want to limit to a region, and show the area being grabbed:. 5 -i desktop -f dshow -i audio=»Microphone Array (Realtek High Definition Audio)» -b:a 64k -f mpegts -t 60 — | ffmpeg -f . Suppose 0 is your monitor. m4a Record audio from an application ffmpeg -f pulse -i alsa_output. $ ffmpeg -f pulse -i output.
How to Use FFmpeg to Extract Audio from Video (Windows)
Audacity seems to be able to do it. Can ffmpeg access WASAPI devices and allow them to be used for recording? So that I can bypass the problem using WASAPI like Audacity.
Download+Install FFMPEG on Windows 10 | Complete Guide 2024
To capture only desktop audio with FFMPEG, you can use the command «ffmpeg -f pulse -i default output. Suppose 0 is your monitor.
We know that we can record our computer screen using FFmpeg, but did you know that we can also capture desktop audio too? I mean desktop audio is the audio that comes from apps you open on your computer such as music, YouTube videos, your video call, etc. This will capture ALL your displays as one big contiguous display.
Now that you have the Command Prompt open, you can start recording your desktop video and audio. mp4.
Recording high-quality video and audio doesn’t have to be complex or expensive. With FFmpeg, a powerful open-source multimedia framework, you can capture video and audio effortlessly using simple command-line instructions.
This tutorial will guide you through a minimalist approach to recording with FFmpeg, ensuring you get the most out of its capabilities without the need for cumbersome software.
In this article, we’ll explore how to utilize FFmpeg for recording screencasts and audio effectively. Whether you’re a seasoned developer looking to create tutorial videos or someone just starting out, this guide will provide you with step-by-step instructions and essential tips to get you started.
What is FFmpeg?
FFmpeg is a command-line tool that acts as a Swiss Army knife for audio and video processing. With FFmpeg, you can:
- Record video and audio
- Convert between different codecs and formats
- Edit, trim, and manipulate media files
- Stream audio and video data
The possibilities with FFmpeg are vast, but in this article, we will focus on the basics of recording video and audio.
Setting Up FFmpeg
Before we dive into recording, make sure you have FFmpeg installed on your system. You can easily install FFmpeg using your package manager. For instance, on Ubuntu, you can run:
sudo apt update
sudo apt install ffmpeg
For Windows, follow the installation instructions on the FFmpeg website.
Recording Video
To record video using FFmpeg, you will typically utilize the x11grab format. Here’s a basic command to start recording your entire screen:
ffmpeg -f x11grab -i :0.0 -codec:v libx264 -pix_fmt yuv420p test.mkv
Breakdown of the Command:
-f x11grab: Specifies the format as x11grab for screen capturing.-i :0.0: Designates the input device.:0.0indicates the display offset (the first screen).-codec:v libx264: Encodes the video using the H.264 codec.-pix_fmt yuv420p: Specifies the pixel format.test.mkv: The output file where the recording will be saved.
To stop recording, simply press Ctrl + C in the terminal.
Recording a Specific Area
To capture a specific area of the screen, you can specify the resolution and offsets. For instance, to record a section of 100×100 pixels, you can modify your command as follows:
ffmpeg -f x11grab -video_size 100x100 -i :0.0+1000,200 -codec:v libx264 test_section.mkv
In this command:
-video_size 100x100: Defines the resolution of the recording area.:0.0+1000,200: Specifies the offset (1000 pixels right and 200 pixels down).
Recording Audio
Recording audio is just as straightforward. To record audio input from your microphone, use the following command:
ffmpeg -f alsa -i default -codec:a flac audio.mkv
Breakdown of the Command:
-f alsa: Specifies the format as ALSA (for Linux audio input).-i default: Sets the input to the default audio device.-codec:a flac: Encodes the audio to FLAC format.
Combining Video and Audio
To record both video and audio simultaneously, you can combine the commands:
ffmpeg -f x11grab -video_size 1920x1080 -i :0.0 -f alsa -i default -codec:v libx264 -codec:a flac output.mkv
This command records your full screen while capturing audio from your microphone and saves both into a single MKV file.
Tips for Effective Recording
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Plan Your Content: Before you start recording, outline the key points you want to cover to make the process smoother.
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Test Your Setup: Always do a short trial recording to ensure that both video and audio are being captured correctly.
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Use Multiple Screens: If you’re working with multiple monitors, use the correct display offset to capture the desired screen.
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Audio Quality: Invest in a decent microphone to improve audio quality, as it significantly impacts viewer engagement.
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Keep It Simple: Utilize minimal settings for straightforward recordings. You can always add more complexity as you gain comfort with FFmpeg.
Conclusion
FFmpeg provides a versatile and powerful way to record audio and video for screencasting and other purposes. With its command-line interface, it may seem daunting at first, but once you get the hang of it, you’ll appreciate its efficiency and flexibility. As you become more familiar with FFmpeg, you can explore additional features like video editing and format conversion.
Whether you’re recording tutorials for your blog, creating learning content, or just experimenting, FFmpeg stands out as a reliable companion. Start using these commands today and elevate your content creation process!
Final Thoughts
FFmpeg is a one-stop solution for recording and processing various media types. Take the time to experiment with different features, codecs, and formats. Happy recording, and don’t hesitate to share your projects with the community!
For further information about FFmpeg, consider checking the official documentation and exploring the vast possibilities this tool offers.