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output-format-context.md

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OutputFormatContext

The OutputFormatContext API extends FormatContext to provide functionality for writing media files.

Constructor

const format = new ffmpeg.OutputFormatContext(formatName, io)

Parameters

  • formatName (string): The output format name (e.g., 'mp4', 'avi')
  • io (IOContext): The IO context for writing. Ownership is automatically transferred to the format context, making the original IOContext safe to destroy multiple times.

Returns: A new OutputFormatContext instance

Properties

OutputFormatContext.outputFormat

Gets the output format associated with this context.

Returns: OutputFormat instance or undefined if not available

Methods

OutputFormatContext.createStream(codec)

Creates a new stream in the output format.

Parameters:

  • codec (Codec): The codec to use for the stream

Returns: A new Stream instance

OutputFormatContext.destroy()

Destroys the OutputFormatContext and closes the output format. Automatically called when the object is managed by a using declaration.

Returns: void