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.
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.