本文主要是介绍nginx-rtmp-module 支持 Enhancing RTMP HEVC(H.265)，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
Enhancing RTMP, FLV 2023年7月31号正式发布，主要支持了HEVC(H.265)、VP9、AV1视频编码，发布差不多半年了，很多开源项目已支持，最近打算播放和推送端也支持下，想找个支持的rtmp server方便测试用，但没找到合适的。干脆自己改改nginx-rtmp-module代码，做个基本的支持，能正常推送和播放Enhancing RTMP H265就好。
Enhancing RTMP细节直接看标准文档，网上能下载到，关键信息就几页, 看起来也快，这里就不再重复说细节了，直接贴下我改的nginx-rtmp-module代码:
/**
** ngx_rtmp_codec_module.h
** 这个文件要改，修改的地方我加了注释,方便参考,问题沟通qq:1130758427, 微信:ldxevt
**//** Copyright (C) Roman Arutyunyan*/#ifndef _NGX_RTMP_CODEC_H_INCLUDED_
#define _NGX_RTMP_CODEC_H_INCLUDED_#include <ngx_config.h>
#include <ngx_core.h>
#include "ngx_rtmp.h"/* Audio codecs */
enum {/* Uncompressed codec id is actually 0,* but we use another value for consistency */NGX_RTMP_AUDIO_UNCOMPRESSED = 16,NGX_RTMP_AUDIO_ADPCM = 1,NGX_RTMP_AUDIO_MP3 = 2,NGX_RTMP_AUDIO_LINEAR_LE = 3,NGX_RTMP_AUDIO_NELLY16 = 4,NGX_RTMP_AUDIO_NELLY8 = 5,NGX_RTMP_AUDIO_NELLY = 6,NGX_RTMP_AUDIO_G711A = 7,NGX_RTMP_AUDIO_G711U = 8,NGX_RTMP_AUDIO_AAC = 10,NGX_RTMP_AUDIO_SPEEX = 11,NGX_RTMP_AUDIO_MP3_8 = 14,NGX_RTMP_AUDIO_DEVSPEC = 15,
};/* Video codecs */
enum {NGX_RTMP_VIDEO_JPEG = 1,NGX_RTMP_VIDEO_SORENSON_H263 = 2,NGX_RTMP_VIDEO_SCREEN = 3,NGX_RTMP_VIDEO_ON2_VP6 = 4,NGX_RTMP_VIDEO_ON2_VP6_ALPHA = 5,NGX_RTMP_VIDEO_SCREEN2 = 6,NGX_RTMP_VIDEO_H264 = 7,
};/**********************************************/
/***下面是Enhancing RTMP加的, 2024-01-25****/#define FLV_EX_VIDEO_HEADER_MASK (0x80)
#define FLV_EX_VIDEO_FRAME_TYPE_MASK (0x70)
#define FLV_EX_VIDEO_PACKET_TYPE_MASK (0xf)enum {FLV_EX_VIDEO_PACKET_TYPE_SEQUENCE_START = 0,FLV_EX_VIDEO_PACKET_TYPE_CODED_FRAMES = 1,FLV_EX_VIDEO_PACKET_TYPE_SEQUENCE_END = 2,FLV_EX_VIDEO_PACKET_TYPE_CODED_FRAMESX = 3,FLV_EX_VIDEO_PACKET_TYPE_META_DATA = 4,FLV_EX_VIDEO_PACKET_TYPE_MPEG2TS_SEQUENCE_START = 5,
};#define FLV_EX_VIDEO_FOURCC_AV1 NT_MAKE_FOURCC('a', 'v', '0', '1')
#define FLV_EX_VIDEO_FOURCC_VP9 NT_MAKE_FOURCC('v', 'p', '0', '9')
#define FLV_EX_VIDEO_FOURCC_HEVC NT_MAKE_FOURCC('h', 'v', 'c', '1')static ngx_inline ngx_int_t
ngx_rtmp_get_ex_video_packet_type(ngx_chain_t *in) {return in->buf->pos[0] & FLV_EX_VIDEO_PACKET_TYPE_MASK;
}static ngx_inline ngx_int_t
ngx_rtmp_is_ex_video_codec_header(ngx_chain_t *in) {return FLV_EX_VIDEO_PACKET_TYPE_SEQUENCE_START == ngx_rtmp_get_ex_video_packet_type(in);
}static ngx_inline ngx_int_t
ngx_rtmp_get_ex_video_frame_type(ngx_chain_t *in) {const uint8_t v = in->buf->pos[0];const uint8_t packet_type = v&FLV_EX_VIDEO_PACKET_TYPE_MASK;if (FLV_EX_VIDEO_PACKET_TYPE_META_DATA == packet_type)return 0;return (v&FLV_EX_VIDEO_FRAME_TYPE_MASK) >> 4;
}/***上面是Enhancing RTMP加的, 2024-01-25****/
/**********************************************/u_char * ngx_rtmp_get_audio_codec_name(ngx_uint_t id);
u_char * ngx_rtmp_get_video_codec_name(ngx_uint_t id);typedef struct {ngx_uint_t width;ngx_uint_t height;ngx_uint_t duration;ngx_uint_t frame_rate;ngx_uint_t video_data_rate;ngx_uint_t video_codec_id;ngx_uint_t audio_data_rate;ngx_uint_t audio_codec_id;ngx_uint_t aac_profile;ngx_uint_t aac_chan_conf;ngx_uint_t aac_sbr;ngx_uint_t aac_ps;ngx_uint_t avc_profile;ngx_uint_t avc_compat;ngx_uint_t avc_level;ngx_uint_t avc_nal_bytes;ngx_uint_t avc_ref_frames;ngx_uint_t sample_rate; /* 5512, 11025, 22050, 44100 */ngx_uint_t sample_size; /* 1=8bit, 2=16bit */ngx_uint_t audio_channels; /* 1, 2 */u_char profile[32];u_char level[32];ngx_chain_t *hevc_header; /*这里HEVC Enhancing RTMP 2024-01-25*/ngx_chain_t *avc_header;ngx_chain_t *aac_header;ngx_chain_t *meta;ngx_uint_t meta_version;
} ngx_rtmp_codec_ctx_t;extern ngx_module_t ngx_rtmp_codec_module;#endif /* _NGX_RTMP_LIVE_H_INCLUDED_ *//***** ngx_rtmp_codec_module.h 文件结束****//**
** ngx_rtmp_codec_module.c
** 这个文件代码较多，就贴下改过的地方,问题沟通qq:1130758427, 微信:ldxevt
**//** Copyright (C) Roman Arutyunyan*/static ngx_int_t
ngx_rtmp_codec_disconnect(ngx_rtmp_session_t *s, ngx_rtmp_header_t *h,ngx_chain_t *in)
{ngx_rtmp_codec_ctx_t *ctx;ngx_rtmp_core_srv_conf_t *cscf;ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_codec_module);if (ctx == NULL) {return NGX_OK;}cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);/*** Enhancing RTMP 修改 2024-01-25***/if (ctx->hevc_header) {ngx_rtmp_free_shared_chain(cscf, ctx->hevc_header);ctx->hevc_header = NULL;}if (ctx->avc_header) {ngx_rtmp_free_shared_chain(cscf, ctx->avc_header);ctx->avc_header = NULL;}if (ctx->aac_header) {ngx_rtmp_free_shared_chain(cscf, ctx->aac_header);ctx->aac_header = NULL;}if (ctx->meta) {ngx_rtmp_free_shared_chain(cscf, ctx->meta);ctx->meta = NULL;}return NGX_OK;
}static ngx_int_t
ngx_rtmp_codec_av(ngx_rtmp_session_t *s, ngx_rtmp_header_t *h,ngx_chain_t *in)
{ngx_rtmp_core_srv_conf_t *cscf;ngx_rtmp_codec_ctx_t *ctx;ngx_chain_t **header;uint8_t fmt;ngx_int_t is_ex_video_header; /*Enhancing RTMP 2024-01-25*/static ngx_uint_t sample_rates[] ={ 5512, 11025, 22050, 44100 };if (h->type != NGX_RTMP_MSG_AUDIO && h->type != NGX_RTMP_MSG_VIDEO) {return NGX_OK;}ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_codec_module);if (ctx == NULL) {ctx = ngx_pcalloc(s->connection->pool, sizeof(ngx_rtmp_codec_ctx_t));ngx_rtmp_set_ctx(s, ctx, ngx_rtmp_codec_module);}/* save codec */if (in->buf->last - in->buf->pos < 1) {return NGX_OK;}fmt = in->buf->pos[0];if (h->type == NGX_RTMP_MSG_AUDIO) {is_ex_video_header = 0; /*Enhancing RTMP 2024-01-25*/ctx->audio_codec_id = (fmt & 0xf0) >> 4;ctx->audio_channels = (fmt & 0x01) + 1;ctx->sample_size = (fmt & 0x02) ? 2 : 1;if (ctx->sample_rate == 0) {ctx->sample_rate = sample_rates[(fmt & 0x0c) >> 2];}} else {/*Enhancing RTMP 2024-01-25*/if (fmt & FLV_EX_VIDEO_HEADER_MASK)is_ex_video_header = 1;else {is_ex_video_header = 0;ctx->video_codec_id = (fmt & 0x0f);}}/*Enhancing RTMP 2024-01-25*/if (!is_ex_video_header) {/* save AVC/AAC header */if (in->buf->last - in->buf->pos < 3) {return NGX_OK;}} else {if (in->buf->last - in->buf->pos < 5)return NGX_OK;const uint8_t* pos = in->buf->pos + 1;ctx->video_codec_id = NT_MAKE_FOURCC(pos[0], pos[1], pos[2], pos[3]);}/*Enhancing RTMP 2024-01-25*//* no conf */if (!is_ex_video_header) {if (!ngx_rtmp_is_codec_header(in))return NGX_OK;} else {if (!ngx_rtmp_is_ex_video_codec_header(in))return NGX_OK;}cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);header = NULL;if (h->type == NGX_RTMP_MSG_AUDIO) {if (ctx->audio_codec_id == NGX_RTMP_AUDIO_AAC) {header = &ctx->aac_header;ngx_rtmp_codec_parse_aac_header(s, in);}} else {/*Enhancing RTMP 2024-01-25*/const ngx_uint_t codec_id = ctx->video_codec_id;if (NGX_RTMP_VIDEO_H264 == codec_id) {header = &ctx->avc_header;ngx_rtmp_codec_parse_avc_header(s, in);}else if (FLV_EX_VIDEO_FOURCC_HEVC == codec_id) {header = &ctx->hevc_header;ngx_rtmp_codec_parse_hevc_header(s, in);}else if (FLV_EX_VIDEO_FOURCC_AV1 == codec_id) {}else if (FLV_EX_VIDEO_FOURCC_VP9 == codec_id) {}}if (header == NULL) {return NGX_OK;}if (*header) {ngx_rtmp_free_shared_chain(cscf, *header);}*header = ngx_rtmp_append_shared_bufs(cscf, NULL, in);return NGX_OK;
}u_char *
ngx_rtmp_get_video_codec_name(ngx_uint_t id)
{/*Enhancing RTMP 2024-01-25*/if (FLV_EX_VIDEO_FOURCC_HEVC == id)return (u_char*)"HEVC";else if (FLV_EX_VIDEO_FOURCC_AV1 == id)return (u_char*)"AV1";else if (FLV_EX_VIDEO_FOURCC_VP9 == id)return (u_char*)"VP9";return (u_char *)(id < sizeof(video_codecs) / sizeof(video_codecs[0])? video_codecs[id]: "");
}/***** ngx_rtmp_codec_module.c 文件结束****/另外rtmp直播还要修改ngx_rtmp_live_module.c, flv录像支持需修改ngx_rtmp_record_module.c, 支持转hls要修改ngx_rtmp_hls_module.c和ngx_rtmp_mpegts.c，根据实际需求改下代码就好。
改好重新编译运行，推送播放效果:
简单改改已经满足我的测试需求， 有问题请联系qq: 1130758427, 微信:ldxevt。
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