Mp4OutputFormat
MPEG-4 Part 14 (MP4) file format. Supports most codecs.
Extends: IsobmffOutputFormat
Constructor
constructor(
options?: IsobmffOutputFormatOptions,
): Mp4OutputFormat;Creates a new Mp4OutputFormat configured with the specified options.
See IsobmffOutputFormatOptions.
Properties
fileExtension
get fileExtension(): string;The file extension used by this output format, beginning with a dot.
mimeType
get mimeType(): string;The base MIME type of the output format.
negativeTimestampSupport
get negativeTimestampSupport(): 'full';The degree to which this output format supports writing media data with negative timestamps.
'full'- Negative timestamps are fully supported.'prefer-non-negative'- Negative timestamps are technically supported, but their use is discouraged.'none'- Negative timestamps are not supported.null- Not applicable since the container doesn't support timestamped media at all.
supportsTimestampedMediaData
get supportsTimestampedMediaData(): boolean;Whether this output format's tracks store timestamped media data. When true, the timestamps of added packets will be respected, allowing things like gaps in media data or non-zero start times. When false, the format's media data implicitly starts at zero and follows an implicit sequential timing from there, using the intrinsic durations of the media data.
supportsVideoTransformationMetadata
get supportsVideoTransformationMetadata(): boolean;Whether this output format supports video rotation and flip metadata.
Methods
getSupportedCodecs()
getSupportedCodecs(): MediaCodec[];Returns a list of media codecs that this output format can contain.
See MediaCodec.
getSupportedTrackCounts()
getSupportedTrackCounts(): TrackCountLimits;Returns the number of tracks that this output format supports.
See TrackCountLimits.