Class Mp4Extractor

    • Field Detail

      • FLAG_WORKAROUND_IGNORE_EDIT_LISTS

        public static final int FLAG_WORKAROUND_IGNORE_EDIT_LISTS
        Flag to ignore any edit lists in the stream.
        See Also:
        Constant Field Values
      • FLAG_READ_MOTION_PHOTO_METADATA

        public static final int FLAG_READ_MOTION_PHOTO_METADATA
        Flag to extract MotionPhotoMetadata from HEIC motion photos following the Google Photos Motion Photo File Format V1.1.

        As playback is not supported for motion photos, this flag should only be used for metadata retrieval use cases.

        See Also:
        Constant Field Values
      • FLAG_READ_SEF_DATA

        public static final int FLAG_READ_SEF_DATA
        Flag to extract SlowMotionData metadata from Samsung Extension Format (SEF) slow motion videos.
        See Also:
        Constant Field Values
    • Constructor Detail

      • Mp4Extractor

        public Mp4Extractor()
        Creates a new extractor for unfragmented MP4 streams.
      • Mp4Extractor

        public Mp4Extractor​(@Flags
                            int flags)
        Creates a new extractor for unfragmented MP4 streams, using the specified flags to control the extractor's behavior.
        Parameters:
        flags - Flags that control the extractor's behavior.
    • Method Detail

      • sniff

        public boolean sniff​(ExtractorInput input)
                      throws IOException
        Description copied from interface: Extractor
        Returns whether this extractor can extract samples from the ExtractorInput, which must provide data from the start of the stream.

        If true is returned, the input's reading position may have been modified. Otherwise, only its peek position may have been modified.

        Specified by:
        sniff in interface Extractor
        Parameters:
        input - The ExtractorInput from which data should be peeked/read.
        Returns:
        Whether this extractor can read the provided input.
        Throws:
        IOException - If an error occurred reading from the input.
      • seek

        public void seek​(long position,
                         long timeUs)
        Description copied from interface: Extractor
        Notifies the extractor that a seek has occurred.

        Following a call to this method, the ExtractorInput passed to the next invocation of Extractor.read(ExtractorInput, PositionHolder) is required to provide data starting from position in the stream. Valid random access positions are the start of the stream and positions that can be obtained from any SeekMap passed to the ExtractorOutput.

        Specified by:
        seek in interface Extractor
        Parameters:
        position - The byte offset in the stream from which data will be provided.
        timeUs - The seek time in microseconds.
      • release

        public void release()
        Description copied from interface: Extractor
        Releases all kept resources.
        Specified by:
        release in interface Extractor
      • read

        public int read​(ExtractorInput input,
                        PositionHolder seekPosition)
                 throws IOException
        Description copied from interface: Extractor
        Extracts data read from a provided ExtractorInput. Must not be called before Extractor.init(ExtractorOutput).

        A single call to this method will block until some progress has been made, but will not block for longer than this. Hence each call will consume only a small amount of input data.

        In the common case, Extractor.RESULT_CONTINUE is returned to indicate that the ExtractorInput passed to the next read is required to provide data continuing from the position in the stream reached by the returning call. If the extractor requires data to be provided from a different position, then that position is set in seekPosition and Extractor.RESULT_SEEK is returned. If the extractor reached the end of the data provided by the ExtractorInput, then Extractor.RESULT_END_OF_INPUT is returned.

        When this method throws an IOException, extraction may continue by providing an ExtractorInput with an unchanged read position to a subsequent call to this method.

        Specified by:
        read in interface Extractor
        Parameters:
        input - The ExtractorInput from which data should be read.
        seekPosition - If Extractor.RESULT_SEEK is returned, this holder is updated to hold the position of the required data.
        Returns:
        One of the RESULT_ values defined in this interface.
        Throws:
        IOException - If an error occurred reading from or parsing the input.
      • isSeekable

        public boolean isSeekable()
        Description copied from interface: SeekMap
        Returns whether seeking is supported.
        Specified by:
        isSeekable in interface SeekMap
        Returns:
        Whether seeking is supported.
      • getDurationUs

        public long getDurationUs()
        Description copied from interface: SeekMap
        Returns the duration of the stream in microseconds.
        Specified by:
        getDurationUs in interface SeekMap
        Returns:
        The duration of the stream in microseconds, or C.TIME_UNSET if the duration is unknown.
      • getSeekPoints

        public SeekMap.SeekPoints getSeekPoints​(long timeUs)
        Description copied from interface: SeekMap
        Obtains seek points for the specified seek time in microseconds. The returned SeekMap.SeekPoints will contain one or two distinct seek points.

        Two seek points [A, B] are returned in the case that seeking can only be performed to discrete points in time, there does not exist a seek point at exactly the requested time, and there exist seek points on both sides of it. In this case A and B are the closest seek points before and after the requested time. A single seek point is returned in all other cases.

        Specified by:
        getSeekPoints in interface SeekMap
        Parameters:
        timeUs - A seek time in microseconds.
        Returns:
        The corresponding seek points.