Nginx-rtmp module and mpeg-dash(Dash industry dash.js)
While this issue was fixed in nginx-rtmp, it looks like the original repository has become stale - the fix is only available in some forks. Try compiling nginx-rtmp from https://github.com/sergey-dryabzhinsky/nginx-rtmp-module or https://github.com/mattpepin/nginx-rtmp-module - both of which seem to have the commit that fixed it in.
huuthang
Updated on June 16, 2022Comments
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huuthang almost 2 years
Mpeg Dash-Streaming
I am working in my thesis about live-streaming . I used ffmpeg,ngix server with rtmp module and dash.js from Dash industry. I start stream to server by ffmpeg, and play by dash, player runned well, but there were some problems.
Player only play if mpd-dash play list still have chunk t=0, so whenever user request player and *.mpd updated with out chunk t=0 player do not run.
I upload my *.mpd file to Dash Validator and get error: "Schematron validation not successful – DASH is not valid! ". But playist is generate by nginx - rtmp module not me.
After searching some forum i got some information that nginx-rtmp module generate wrong dash play list *.mpd Nginx rtmp module -bug , and may be that bug was fixed and merged to master in github (i thought so Mered - report) . But i tried downloading newest nginx and rtmp module , Player also play incorrect.
If i played with dash.all.js version 2 year ago : video only play good (play to end) if chunk t=0 is exist in play list *.mpd ,or player do not play (play in middle of streaming) If i played with dash.all.js lasted version : video play and stop playing soon or loop playing.
I really need some help, my deadline is comming.
Here is my nginx config(main config):
rtmp { server { listen 1935; ping 30s; notify_method get; chunk_size 4000; allow play all; application myapp { live on; dash on; dash_path /tmp/dash; hls on; hls_cleanup on; hls_sync 100ms; hls_fragment 2s; hls_path /tmp/hls; allow play all; } } }
and some others config:
location /hls { # Serve HLS fragments types { application/vnd.apple.mpegurl m3u8; video/mp2t ts; } root /tmp; add_header Cache-Control no-cache; add_header Access-Control-Allow-Origin *; } location /dash.js { root /usr/share/nginx/html; } location /streaminghls { root /usr/share/nginx/html; } location /dash { # Serve DASH fragments root /tmp; add_header Access-Control-Allow-Origin *; }
and in html player :
<script src="dash-old.all.js"></script> <script> function getUrlVars() { var vars = {}; var parts = window.location.href.replace(/[?&]+([^=&]+)=([^&]*)/gi, function(m,key,value) { vars[key] = value; }); return vars; } function startVideo() { var vars = getUrlVars(), url = "http://192.168.100.107:80/dash/Screen.mpd", video, context, player; if (vars && vars.hasOwnProperty("url")) { url = vars.url; } video = document.querySelector(".dash-video-player video"); context = new Dash.di.DashContext(); player = new MediaPlayer(context); player.startup(); player.attachView(video); player.setAutoPlay(true); player.attachSource(url); } </script>
Hls play excellently but not dash. I tried changing dash config in nginx config and C-source of rtmp-module with recompiling but not thing changed.
My mpd play list :
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2011/XMLSchema-instance" type="dynamic" availabilityStartTime="2015-12-17T03:17:07+07:00" availabilityEndTime="2015-12-17T03:18:23+07:00" minimumUpdatePeriod="PT5S" minBufferTime="PT5S" timeShiftBufferDepth="PT0H0M0.00S" suggestedPresentationDelay="PT10S" profiles="urn:hbbtv:dash:profile:isoff-live:2012,urn:mpeg:dash:profile:isoff-live:2011" xsi:schemaLocation="urn:mpeg:DASH:schema:MPD:2011 DASH-MPD.xsd"> <Period start="PT0S" id="dash"> <AdaptationSet id="1" segmentAlignment="true" maxWidth="320" maxHeight="240" maxFrameRate="20"> <Representation id="Screen_H264" mimeType="video/mp4" codecs="avc1.64000c" width="320" height="240" frameRate="20" sar="1:1" startWithSAP="1" bandwidth="192000"> <SegmentTemplate presentationTimeOffset="0" timescale="1000" media="Screen-$Time$.m4v" initialization="Screen-init.m4v"> <SegmentTimeline> <S t="0" d="12500"/> <S t="12500" d="12500"/> <S t="25000" d="10550"/> <S t="35550" d="15700"/> <S t="51250" d="12500"/> <S t="63750" d="12500"/> </SegmentTimeline> </SegmentTemplate> </Representation> </AdaptationSet> <AdaptationSet id="2" segmentAlignment="true"> <AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="1"/> <Representation id="Screen_AAC" mimeType="audio/mp4" codecs="mp4a.40.2" audioSamplingRate="22050" startWithSAP="1" bandwidth="62000"> <SegmentTemplate presentationTimeOffset="0" timescale="1000" media="Screen-$Time$.m4a" initialization="Screen-init.m4a"> <SegmentTimeline> <S t="0" d="12500"/> <S t="12500" d="12500"/> <S t="25000" d="10550"/> <S t="35550" d="15700"/> <S t="51250" d="12500"/> <S t="63750" d="12500"/> </SegmentTimeline> </SegmentTemplate> </Representation> </AdaptationSet> </Period> </MPD>
I really need help.
Thanks for reading, and am so sorry about my bad english.