1e41f4b71Sopenharmony_ci# native_avdemuxer.h 2e41f4b71Sopenharmony_ci 3e41f4b71Sopenharmony_ci 4e41f4b71Sopenharmony_ci## Overview 5e41f4b71Sopenharmony_ci 6e41f4b71Sopenharmony_ciDeclares the APIs for parsing audio and video media data. 7e41f4b71Sopenharmony_ci 8e41f4b71Sopenharmony_ci**Library**: libnative_media_avdemuxer.so 9e41f4b71Sopenharmony_ci 10e41f4b71Sopenharmony_ci**Since**: 10 11e41f4b71Sopenharmony_ci 12e41f4b71Sopenharmony_ci**Related module**: [AVDemuxer](_a_v_demuxer.md) 13e41f4b71Sopenharmony_ci 14e41f4b71Sopenharmony_ci 15e41f4b71Sopenharmony_ci## Summary 16e41f4b71Sopenharmony_ci 17e41f4b71Sopenharmony_ci 18e41f4b71Sopenharmony_ci### Types 19e41f4b71Sopenharmony_ci 20e41f4b71Sopenharmony_ci| Name| Description| 21e41f4b71Sopenharmony_ci| -------- | -------- | 22e41f4b71Sopenharmony_ci| 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. | 23e41f4b71Sopenharmony_ci| 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. | 24e41f4b71Sopenharmony_ci 25e41f4b71Sopenharmony_ci 26e41f4b71Sopenharmony_ci### Functions 27e41f4b71Sopenharmony_ci 28e41f4b71Sopenharmony_ci| Name| Description| 29e41f4b71Sopenharmony_ci| -------- | -------- | 30e41f4b71Sopenharmony_ci| 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. | 31e41f4b71Sopenharmony_ci| [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. | 32e41f4b71Sopenharmony_ci| [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. | 33e41f4b71Sopenharmony_ci| [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. | 34e41f4b71Sopenharmony_ci| [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. (This function is deprecated in API version 11.) | 35e41f4b71Sopenharmony_ci| [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) | Obtains the compressed frame and related information at the current position from the selected track. | 36e41f4b71Sopenharmony_ci| [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. | 37e41f4b71Sopenharmony_ci| [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. | 38e41f4b71Sopenharmony_ci| [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. | 39e41f4b71Sopenharmony_ci| [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. | 40