# native_avcodec_videoencoder.h


## Overview

The **native_avcodec_videoencoder.h** file declares the native APIs used for video encoding.

**Library**: libnative_media_venc.so

**Since**: 9

**Related module**: [VideoEncoder](_video_encoder.md)


## Summary


### Types

| Name| Description| 
| -------- | -------- |
| typedef void(\* [OH_VideoEncoder_OnNeedInputParameter](_video_encoder.md#oh_videoencoder_onneedinputparameter)) ([OH_AVCodec](_codec_base.md#oh_avcodec) \*codec, uint32_t index, OH_AVFormat \*parameter, void \*userData) | Defines the pointer to the function that is called when new input parameters are required during the running of an **OH_AVCodec** instance. The function carries a buffer to fill in the new input parameters. The parameters take effect immediately with the frame. | 
| typedef enum [OH_VideoEncodeBitrateMode](_video_encoder.md#oh_videoencodebitratemode-1) [OH_VideoEncodeBitrateMode](_video_encoder.md#oh_videoencodebitratemode) | Defines an enum for bit rate modes of a video encoder. (This type is deprecated from API version 14.)| 


### Enums

| Name| Description| 
| -------- | -------- |
| [OH_VideoEncodeBitrateMode](_video_encoder.md#oh_videoencodebitratemode-1) { CBR = 0, VBR = 1, CQ = 2 } | Enumerates the bit rate modes of a video encoder. (This enum is deprecated from API version 14.)| 


### Functions

| Name| Description| 
| -------- | -------- |
| OH_AVCodec \* [OH_VideoEncoder_CreateByMime](_video_encoder.md#oh_videoencoder_createbymime) (const char \*mime) | Creates a video encoder instance based on a Multipurpose Internet Mail Extension (MIME) type.| 
| OH_AVCodec \* [OH_VideoEncoder_CreateByName](_video_encoder.md#oh_videoencoder_createbyname) (const char \*name) | Creates a video encoder instance based on an encoder name.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoEncoder_Destroy](_video_encoder.md#oh_videoencoder_destroy) (OH_AVCodec \*codec) | Clears the internal resources of a video encoder and destroys the encoder instance.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoEncoder_SetCallback](_video_encoder.md#oh_videoencoder_setcallback) (OH_AVCodec \*codec, [OH_AVCodecAsyncCallback](_o_h___a_v_codec_async_callback.md) callback, void \*userData) | Sets an asynchronous callback so that your application can respond to events generated by a video encoder.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoEncoder_RegisterCallback](_video_encoder.md#oh_videoencoder_registercallback) (OH_AVCodec \*codec, [OH_AVCodecCallback](_o_h___a_v_codec_callback.md) callback, void \*userData) | Registers an asynchronous callback so that your application can respond to events generated by a video encoder.| 
| OH_AVErrCode [OH_VideoEncoder_RegisterParameterCallback](_video_encoder.md#oh_videoencoder_registerparametercallback) ([OH_AVCodec](_codec_base.md#oh_avcodec) \*codec, [OH_VideoEncoder_OnNeedInputParameter](_video_encoder.md#oh_videoencoder_onneedinputparameter) onInputParameter, void \*userData) | Registers an asynchronous input parameter callback so that your application can respond to events generated by a video encoder. | 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoEncoder_Configure](_video_encoder.md#oh_videoencoder_configure) (OH_AVCodec \*codec, OH_AVFormat \*format) | Configures a video encoder. Typically, you need to configure the description information about the video track to be encoded.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoEncoder_Prepare](_video_encoder.md#oh_videoencoder_prepare) (OH_AVCodec \*codec) | Prepares internal resources for a video encoder.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoEncoder_Start](_video_encoder.md#oh_videoencoder_start) (OH_AVCodec \*codec) | Starts a video encoder. This function can be called only after the encoder is prepared.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoEncoder_Stop](_video_encoder.md#oh_videoencoder_stop) (OH_AVCodec \*codec) | Stops a video encoder.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoEncoder_Flush](_video_encoder.md#oh_videoencoder_flush) (OH_AVCodec \*codec) | Clears the input and output data in the internal buffer of a video encoder.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoEncoder_Reset](_video_encoder.md#oh_videoencoder_reset) (OH_AVCodec \*codec) | Resets a video encoder.| 
| OH_AVFormat \* [OH_VideoEncoder_GetOutputDescription](_video_encoder.md#oh_videoencoder_getoutputdescription) (OH_AVCodec \*codec) | Obtains the description information about the output data of a video encoder.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoEncoder_SetParameter](_video_encoder.md#oh_videoencoder_setparameter) (OH_AVCodec \*codec, OH_AVFormat \*format) | Sets dynamic parameters for a video encoder.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoEncoder_GetSurface](_video_encoder.md#oh_videoencoder_getsurface) (OH_AVCodec \*codec, OHNativeWindow \*\*window) | Obtains the input surface from a video encoder.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoEncoder_FreeOutputData](_video_encoder.md#oh_videoencoder_freeoutputdata) (OH_AVCodec \*codec, uint32_t index) | Frees an output buffer of a video encoder.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoEncoder_NotifyEndOfStream](_video_encoder.md#oh_videoencoder_notifyendofstream) (OH_AVCodec \*codec) | Notifies a video encoder that input streams end.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoEncoder_PushInputData](_video_encoder.md#oh_videoencoder_pushinputdata) (OH_AVCodec \*codec, uint32_t index, [OH_AVCodecBufferAttr](_o_h___a_v_codec_buffer_attr.md) attr) | Pushes the input buffer filled with data to a video encoder.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoEncoder_PushInputBuffer](_video_encoder.md#oh_videoencoder_pushinputbuffer) (OH_AVCodec \*codec, uint32_t index) | Pushes the input buffer filled with data to a video encoder.| 
| OH_AVErrCode [OH_VideoEncoder_PushInputParameter](_video_encoder.md#oh_videoencoder_pushinputparameter) ([OH_AVCodec](_codec_base.md#oh_avcodec) \*codec, uint32_t index) | Pushes the input buffer filled with the input parameters to a video encoder. | 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoEncoder_FreeOutputBuffer](_video_encoder.md#oh_videoencoder_freeoutputbuffer) (OH_AVCodec \*codec, uint32_t index) | Frees an output buffer of a video encoder.| 
| OH_AVFormat \* [OH_VideoEncoder_GetInputDescription](_video_encoder.md#oh_videoencoder_getinputdescription) (OH_AVCodec \*codec) | Obtains the description received by a video encoder.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoEncoder_IsValid](_video_encoder.md#oh_videoencoder_isvalid) (OH_AVCodec \*codec, bool \*isValid) | Checks whether a video encoder instance is valid.|