Audio and Video Data

Read and write video and audio files; Record and play audio

Read or write video or audio files, and record and play audio using your system's input and output devices.

Read or write video files by creating video objects. The video object contains information about the video file and enables you to read, analyze, and write video data.
Read or write audio data from files into arrays using the audio read and write functions.
Record or play audio files in with your system's input (microphone) and output devices (speakers) by using the audio recorder and player objects.

Live Editor Tasks

Import data from a file in the Live Editor (Since R2023a)

`VideoReader`	Create object to read video files
`read`	Read one or more video frames
`readFrame`	Read next video frame
`hasFrame`	Determine if video frame is available to read
`getFileFormats`	File formats that `VideoReader` supports
`mmfileinfo`	Information about multimedia file

`VideoWriter`	Create object to write video files
`open`	Open file for writing video data
`writeVideo`	Write video data to file
`close`	Close file after writing video data
`getProfiles`	Profiles and file formats that `VideoWriter` supports

`audioread`	Read audio file
`audiowrite`	Write audio file
`lin2mu`	Convert linear audio signal to mu-law
`mu2lin`	Convert mu-law audio signal to linear
`audioinfo`	Information about audio file

`audioplayer`	Object for playing audio
`isplaying`	Determine if playback is in progress
`pause`	Pause playback of `audioplayer` object or recording of `audiorecorder` object
`play`	Play audio from `audioplayer` object
`playblocking`	Play audio from `audioplayer` object; hold control until playback completes
`resume`	Resume playback of `audioplayer` object or recording of `audiorecorder` object from paused state
`stop`	Stop playback of `audioplayer` object or recording of `audiorecorder` object

`audiorecorder`	Object for recording audio
`getaudiodata`	Store recorded audio signal in numeric array
`getplayer`	Create associated `audioplayer` object
`isrecording`	Determine if recording is in progress
`record`	Record audio to `audiorecorder` object
`recordblocking`	Record audio to `audiorecorder` object; hold control until recording completes

`audiodevinfo`	Information about audio device
`audiodevreset`	Refresh list of available audio devices (Since R2020b)
`sound`	Convert matrix of signal data to sound
`soundsc`	Scale data and play as sound
`beep`	Produce operating system beep sound

Read Video Files
Read frames from a video starting at a specific time or frame index, read frames within a specified interval, and read all the frames in the video.
Convert Between Image Sequences and Video
Convert between video files and sequences of image files using VideoReader and VideoWriter.
Read and Write Audio Files
Write data to an audio file, get information about the file, and then read the data back into the MATLAB^® workspace.
Record and Play Audio
Record and play audio data for processing in MATLAB from audio input and output devices on your system.
Supported Video and Audio File Formats
Video and audio files in MATLAB and their supported file formats and codecs.