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视频会议直播和存储

DVR的配置文件说明:#dvrRTMPstreamtofile,#starttorecordtofilewhenencoderpublish,#reapf

DVR的配置文件说明:

# dvr RTMP stream to file,
# start to record to file when encoder publish,
# reap flv according by specified dvr_plan.
dvr {
# whether enabled dvr features
# default: off
enabled on;
# the dvr output path.
# the app dir is auto created under the dvr_path.
# for example, for rtmp stream:
# rtmp://127.0.0.1/live/livestream
# http://127.0.0.1/live/livestream.m3u8
# where dvr_path is /dvr, srs will create the following files:
# /dvr/live the app dir for all streams.
# /dvr/live/livestream.{time}.flv the dvr flv file.
# @remark, the time use system timestamp in ms, user can use http callback to rename it.
# in a word, the dvr_path is for vhost.
# default: ./objs/nginx/html
dvr_path ./objs/nginx/html;
# the dvr plan. canbe:
# session reap flv when session end(unpublish).
# segment reap flv when flv duration exceed the specified dvr_duration.
# default: session
dvr_plan session;
# the param for plan(segment), in seconds.
# default: 30
dvr_duration 30;
# the param for plan(segment),
# whether wait keyframe to reap segment,
# if off, reap segment when duration exceed the dvr_duration,
# if on, reap segment when duration exceed and got keyframe.
# default: on
dvr_wait_keyframe on;
# about the stream monotonically increasing:
# 1. video timestamp is monotonically increasing,
# 2. audio timestamp is monotonically increasing,
# 3. video and audio timestamp is interleaved monotonically increasing.
# it's specified by RTMP specification, @see 3. Byte Order, Alignment, and Time Format
# however, some encoder cannot provides this feature, please set this to off to ignore time jitter.
# the time jitter algorithm:
# 1. full, to ensure stream start at zero, and ensure stream monotonically increasing.
# 2. zero, only ensure sttream start at zero, ignore timestamp jitter.
# 3. off, disable the time jitter algorithm, like atc.
# default: full
time_jitter full;
}

DVR的计划即决定什么时候关闭flv文件,打开新的flv文件,主要的录制计划包括:

  • session:按照session来关闭flv文件,即编码器停止推流时关闭flv,整个session录制为一个flv。
  • segment:按照时间分段录制,flv文件时长配置为dvr_duration和dvr_wait_keyframe。注意:若不按关键帧切flv(即dvr_wait_keyframe配置为off),所以会导致后面的flv启动时会花屏。
  • time_jitter: 时间戳抖动算法。full使用完全的时间戳矫正;zero只是保证从0开始;off不矫正时间戳。

1,编译设置

./configure --with-dvr && make

2,启动

./objs/srs -c conf/dvr.session.conf



3,,视频录制效果

本地视频观看



服务端视频存储



注:启动./objs/srs -c conf/dvr.session.conf之前必须先停止所有的SRS进程

参考资料:https://github.com/simple-rtmp-server/srs/wiki/v1_CN_DVR


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