Changes

Audio capture

544 bytes added, 15:05, 23 July 2021
Input mode
Screenbits captures audio from output and input audio devices. You can capture audio either individually in audio capture mode or add it to the captured video when using other [[Capture_mode|capture modes]]. == Recording Devices Input and output audio ==You Screenbits uses general terms for the audio sources which it can record capture. The term ''output audio '' refers to the audio which is generated by the system and provided to an external device. This is usually the system sound which you can hear from any speakers or headphones. In contrast, ''input or output audio'' refers to the audio generated by an external device including , usually a microphone , and speakers (is provided as an input to the system sound)== Audio capture mode ==In audio capture mode, audio devices are the only capture source so the output only contains audio, and [[Recorder|recorder]] produces audio files.#From the application window, click '''Audio''' button under ''Mode'' section.#Under ''Source'' section, enable at least one of the input or audio devices to capture. [[File:Playbackcapture_mode-devicesaudio.png|frame|left|Figure 1: Playback Audio Capture (PrimaryAudio capture mode) devices]]
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 === Notes ===*You can manually choose a specific device to capture rather than the default device. == Other capture modes ==To capture audio in a capture mode other that audio capture mode:#From the [[Getting_started#Application_window|application window]], under ''Options'' section, turn '''Output audio''' or '''Input audio''' switch on. [[File:RecordingAudio-devicescapture.png|frame|left|Figure 12: Recording Audio capture (SecondaryScreen capture mode) devices]]
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To enable recording == Input mode ==You can choose the input mode for capturing audio from an output input audio device (esuch as a microphone.g. Speakers or system sound)Currently, two input modes are available:#From the application window, under ''Audio'' section, click ''Open-mic'Output audio'and '' button Push-to open output audio menu.#Turn '''Record output audio''' switch on.#Click '''Record'-talk'' button to start recording.
In open-mic mode, the input audio gets captured continuously while in push-to-talk mode, input audio gets captured only when the specified push-to-talk key on keyboard is pressed. You can use push-to-talk mode to capture your voice only when you speak.
To enable recording a recording device (e.g. Microphone):#From change the application window, under ''Audio'' section, click '''Input output''' button to open input audio menu.#Turn '''Record input audio''' switch on.#Click '''Record''' button to start recording.mode:
#From the [[Getting_started#Application_window|application window]], click '''Input audio options''' button next to the input audio switch under ''Options'' or ''Audio'' section to open ''Input audio options''.#Select the desired input mode from '''Input mode''' selector. [[File:Input-audio-options.png|frame|left|Figure 3: Input audio options]]<br clear=all> == Notes =Volume ==*Screenbits uses system volume settings to capture audio devices. You can select the device use ''Settings'' app to change volume for output and input audio:#Click '''Start''' to open ''Start Menu''.#Click '''Settings''' to record if you do not want open ''Settings'' app.#Click '''System''' to record the default deviceopen ''System'' settings.#Click '''Sound''' to change sound settings.*List of the devices may vary depending on your hardware[[File:System-sound-settings.png|frame|left|Figure 4: System sound settings]]<br clear=all>
== Supported formats ==
Screenbits supports recording devices with the following audio formats for the inputto capture:
* 8kHz, 11.025kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz sample rates
* 16, 24 and 32 bits per sample
If you attempt to record capture an audio device with an unsupported format, an error message pops up asking you to select a different format for the device.
To change the default format of an audio device:
#Select Click '''SettingsStart''' to open ''Start Menu''.#Click '' from 'Settings'Recording'' menu to open ''Settings'' viewapp.#From Click '''System'Input'' section under the to open ''AudioSystem'' tab, click settings.#Click '''ConfigureSound''' to open change sound settings.#Click '''Sound Control''' panel under ''Related Settings'' to open ''Sound'' control panel.#Right click on name of the device in list under the ''Playback'' or ''Recording'' tab and click '''Properties'''.
#From ''Default Format'' section under the ''Advanced Tab'' select one of the supported formats above.
#Click '''OK''' to apply changes to the device properties
 [[File:Audio-format.png|frame|left|Figure 25: Audio Format - Sound settings]]
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== Output format ==
Screenbits encodes recorded audio using AAC codec, allows you to configure bit-rate, sample-rate and number of channels for it.
 
To change format of the output audio:
#Select '''Settings''' from '''Record''' menu to open ''Settings'' dialog.
#Click '''Audio''' from the side bar to open ''Audio'' settings.
#From ''Output format'' section, select the desired bit-rate, sample-rate and number of channels for the output audio.
 
Note: If multiple audio sources are selected, Screenbits mixes both audio streams into a single audio track.
 
== Performance ==
There are several ways to improve performance of Screenbits. If you want are experiencing glitches in the recorded audio or using Screenbits on a low-end device, follow one or more instructions on below to improve the performance.
 
==== Use default formats ====
If you record audio, select one of the following formats for the audio device from the [[Audio_recording#Supported_formats|Audio settings]]
*2 channel (stereo), 16bit, 44100 Hz
*2 channel (stereo), 16bit, 48000 Hz
 
==== Select the same format for multiple devices ====
If you record both recording and playback devices, make sure same format is selected for both devices. To make input and output match together to perform better, select '''Auto''' for sample-rate and channels from [[Settings#Audio_settings|Audio settings]].