70 lines
2.8 KiB
C++
70 lines
2.8 KiB
C++
#pragma once
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#ifdef VP_WITH_FFMPEG
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#include "ff_des.h"
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#include "../vp_des_node.h"
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namespace vp_nodes {
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/**
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* universal DES node using FFmpeg.
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*
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* support output uri:
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* 1. path of file streams like `./vp_data/out_vp_test.mp4`.
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* 2. url of network streams like `rtmp://192.168.77.68/live/stream`.
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*/
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class vp_ff_des_node final: public vp_des_node {
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private:
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/* inner members. */
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std::string m_out_uri = "";
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bool m_use_osd = true;
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int m_out_bitrate = 1024;
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std::string m_encoder_name = "";
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vp_objects::vp_size m_resolution_w_h;
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/**
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* encode & enmux.
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*/
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ff_des_ptr m_ff_des = nullptr;
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/**
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* SwsContext used fot scale by FFmpeg.
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*/
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SwsContext* sws_ctx = NULL;
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protected:
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// re-implementation, return nullptr.
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virtual std::shared_ptr<vp_objects::vp_meta> handle_frame_meta(std::shared_ptr<vp_objects::vp_frame_meta> meta) override;
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public:
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/**
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* create vp_ff_des_node instance using initial parameters.
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*
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* @param node_name specify the name of DES node.
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* @param channel_index specify the channel index of DES node.
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* @param out_uri specify the uri to be written.
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* @param use_osd specify use osd frame as output or not.
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* @param out_width specify the final width of output, 0 means use the width of frame flowing in pipeline.
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* @param out_height specify the final height of output, 0 means use the height of frame flowing in pipeline.
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* @param out_fps specify the fps of output, 0 means use the fps of original stream in pipeline.
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* @param out_bitrate specify the bitrate of output (kbit/s).
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* @param out_max_b_frames specify the max B frames in a GOP for encoding.
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* @param encoder_name specify the encoder name (`libx264`/`libx265`/`h264_nvenc`/`hevc_nvenc`) used for encoding in FFmpeg.
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* @param out_sw_pix_fmt specify the pixel format of output.
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*
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* @note
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* the encoder specified by `encoder_name` MUST be supported already in FFmpeg,
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* we can run `ffmpeg -encoders` to show list of encoders supported in FFmpeg.
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* if the encoder not found, please reconfigure & rebuild your FFmpeg.
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*/
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vp_ff_des_node(const std::string& node_name,
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int channel_index,
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const std::string& out_uri,
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vp_objects::vp_size resolution_w_h = {},
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int bitrate = 1024,
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bool osd = true,
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std::string encoder_name = "libx264");
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~vp_ff_des_node();
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/**
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* return out uri of DES node.
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*/
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virtual std::string to_string() override;
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};
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}
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#endif |