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Last updated 2025-07-10 UTC.
[null,null,["Last updated 2025-07-10 UTC."],[],[],null,["# androidx.media3.muxer\n=====================\n\n*** ** * ** ***\n\nKotlin \\|[Java](/reference/androidx/media3/muxer/package-summary \"View this page in Java\")\n\nInterfaces\n----------\n\n|------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| [AnnexBToAvccConverter](/reference/kotlin/androidx/media3/muxer/AnnexBToAvccConverter) | Converts a buffer containing H.264/H.265 NAL units from the Annex-B format (ISO/IEC 14496-14 Annex B, which uses start codes to delineate NAL units) to the avcC format (ISO/IEC 14496-15, which uses length prefixes). |\n| [ByteBufferAllocator](/reference/kotlin/androidx/media3/muxer/ByteBufferAllocator) | A memory allocator for [ByteBuffer](https://developer.android.com/reference/java/nio/ByteBuffer.html). |\n| [Mp4Muxer.Mp4AtFileParameters.CacheFileProvider](/reference/kotlin/androidx/media3/muxer/Mp4Muxer.Mp4AtFileParameters.CacheFileProvider) | Provides temporary cache files to be used by the muxer. |\n| [Muxer](/reference/kotlin/androidx/media3/muxer/Muxer) | A muxer for producing media container files. |\n| [Muxer.Factory](/reference/kotlin/androidx/media3/muxer/Muxer.Factory) | Factory for muxers. |\n\nClasses\n-------\n\n|------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| [AacMuxer](/reference/kotlin/androidx/media3/muxer/AacMuxer) | A muxer for creating an AAC (Advanced Audio Coding) container file. |\n| [BufferInfo](/reference/kotlin/androidx/media3/muxer/BufferInfo) | Contains metadata of a sample [ByteBuffer](https://developer.android.com/reference/java/nio/ByteBuffer.html). |\n| [FragmentedMp4Muxer](/reference/kotlin/androidx/media3/muxer/FragmentedMp4Muxer) | A muxer for creating a fragmented MP4 file. |\n| [FragmentedMp4Muxer.Builder](/reference/kotlin/androidx/media3/muxer/FragmentedMp4Muxer.Builder) | A builder for [FragmentedMp4Muxer](/reference/kotlin/androidx/media3/muxer/FragmentedMp4Muxer) instances. |\n| [Mp4Muxer](/reference/kotlin/androidx/media3/muxer/Mp4Muxer) | A muxer for creating an MP4 container file. |\n| [Mp4Muxer.Builder](/reference/kotlin/androidx/media3/muxer/Mp4Muxer.Builder) | A builder for [Mp4Muxer](/reference/kotlin/androidx/media3/muxer/Mp4Muxer) instances. |\n| [Mp4Muxer.Mp4AtFileParameters](/reference/kotlin/androidx/media3/muxer/Mp4Muxer.Mp4AtFileParameters) | Parameters for [FILE_FORMAT_MP4_WITH_AUXILIARY_TRACKS_EXTENSION](/reference/kotlin/androidx/media3/muxer/Mp4Muxer#FILE_FORMAT_MP4_WITH_AUXILIARY_TRACKS_EXTENSION()). |\n| [MuxerUtil](/reference/kotlin/androidx/media3/muxer/MuxerUtil) | Utility methods for muxer. |\n\nExceptions\n----------\n\n|--------------------------------------------------------------------------|-------------------------------------|\n| [MuxerException](/reference/kotlin/androidx/media3/muxer/MuxerException) | Thrown when a muxer failure occurs. |\n\nAnnotations\n-----------\n\n|--------------------------------------------------------------------------------------------------------------------|-----------------------------------------------|\n| [Mp4Muxer.FileFormat](/reference/kotlin/androidx/media3/muxer/Mp4Muxer.FileFormat) | The specific MP4 file format. |\n| [Mp4Muxer.LastSampleDurationBehavior](/reference/kotlin/androidx/media3/muxer/Mp4Muxer.LastSampleDurationBehavior) | Behavior for the duration of the last sample. |"]]
