1# native_avdemuxer.h 2 3 4## Overview 5 6The file declares the APIs for parsing audio and video media data. 7 8**Library**: libnative_media_avdemuxer.so 9 10**File to include**: <multimedia/player_framework/native_avdemuxer.h> 11 12**Since**: 10 13 14**Related module**: [AVDemuxer](_a_v_demuxer.md) 15 16**Sample**: [AVCodec](https://gitcode.com/openharmony/applications_app_samples/tree/master/code/BasicFeature/Media/AVCodec) 17 18 19## Summary 20 21 22### Types 23 24| Name| Description| 25| -------- | -------- | 26| typedef void(* [DRM_MediaKeySystemInfoCallback](_a_v_demuxer.md#drm_mediakeysysteminfocallback)) (DRM_MediaKeySystemInfo *mediaKeySystemInfo) | Defines a pointer to the callback function for the media key system information. (It is deprecated from API version 14.) | 27| typedef void(* [Demuxer_MediaKeySystemInfoCallback](_a_v_demuxer.md#demuxer_mediakeysysteminfocallback)) (OH_AVDemuxer *demuxer, DRM_MediaKeySystemInfo *mediaKeySystemInfo)| Defines a pointer to the callback function for the media key system information. | 28 29 30### Functions 31 32| Name| Description| 33| -------- | -------- | 34| OH_AVDemuxer \* [OH_AVDemuxer_CreateWithSource](_a_v_demuxer.md#oh_avdemuxer_createwithsource) ([OH_AVSource](_a_v_source.md#oh_avsource) \*source) | Creates an OH_AVDemuxer instance based on a source instance. | 35| [OH_AVErrCode](_core.md#oh_averrcode) [OH_AVDemuxer_Destroy](_a_v_demuxer.md#oh_avdemuxer_destroy) (OH_AVDemuxer \*demuxer) | Destroys an OH_AVDemuxer instance and clears internal resources. | 36| [OH_AVErrCode](_core.md#oh_averrcode) [OH_AVDemuxer_SelectTrackByID](_a_v_demuxer.md#oh_avdemuxer_selecttrackbyid) (OH_AVDemuxer \*demuxer, uint32_t trackIndex) | Selects a track from which the demuxer reads sample data. | 37| [OH_AVErrCode](_core.md#oh_averrcode) [OH_AVDemuxer_UnselectTrackByID](_a_v_demuxer.md#oh_avdemuxer_unselecttrackbyid) (OH_AVDemuxer \*demuxer, uint32_t trackIndex) | Deselects a track. The demuxer no longer reads data from a track after it is deselected. | 38| [OH_AVErrCode](_core.md#oh_averrcode) [OH_AVDemuxer_ReadSample](_a_v_demuxer.md#oh_avdemuxer_readsample) (OH_AVDemuxer \*demuxer, uint32_t trackIndex, [OH_AVMemory](_core.md#oh_avmemory) \*sample, [OH_AVCodecBufferAttr](_o_h___a_v_codec_buffer_attr.md) \*info) | Reads the sample and related information from the specified track. (It is deprecated from API version 11.) | 39| [OH_AVErrCode](_core.md#oh_averrcode) [OH_AVDemuxer_ReadSampleBuffer](_a_v_demuxer.md#oh_avdemuxer_readsamplebuffer) (OH_AVDemuxer \*demuxer, uint32_t trackIndex, [OH_AVBuffer](_core.md#oh_avbuffer) \*sample) | Reads the sample and related information from the specified track.. | 40| [OH_AVErrCode](_core.md#oh_averrcode) [OH_AVDemuxer_SeekToTime](_a_v_demuxer.md#oh_avdemuxer_seektotime) (OH_AVDemuxer \*demuxer, int64_t millisecond, [OH_AVSeekMode](_codec_base.md#oh_avseekmode) mode) | Seeks to the specified time for all the selected tracks based on a seek mode. | 41| [OH_AVErrCode](_core.md#oh_averrcode) [OH_AVDemuxer_SetMediaKeySystemInfoCallback](_a_v_demuxer.md#oh_avdemuxer_setmediakeysysteminfocallback) (OH_AVDemuxer \*demuxer, DRM_MediaKeySystemInfoCallback callback) | Sets an asynchronous callback for obtaining the media key system information. (It is deprecated from API version 14.) | 42| [OH_AVErrCode](_core.md#oh_averrcode) [OH_AVDemuxer_SetDemuxerMediaKeySystemInfoCallback](_a_v_demuxer.md#oh_avdemuxer_setdemuxermediakeysysteminfocallback) (OH_AVDemuxer \*demuxer, Demuxer_MediaKeySystemInfoCallback callback) | Sets an asynchronous callback for obtaining the media key system information. | 43| [OH_AVErrCode](_core.md#oh_averrcode) [OH_AVDemuxer_GetMediaKeySystemInfo](_a_v_demuxer.md#oh_avdemuxer_getmediakeysysteminfo) (OH_AVDemuxer \*demuxer, DRM_MediaKeySystemInfo \*mediaKeySystemInfo) | Obtains the media key system information. | 44