[Freeswitch-users] youtube broadcast from freeswitch audio quality

Anthony Minessale anthony.minessale at gmail.com
Wed May 2 18:55:26 UTC 2018 

mod_rtmp is not related to recording over rtmp its a legacy endpoint for
flash audio embedded in a browser.

We broadcast ClueCon weekly on our youtube page every week and we have no
audio issues but we do make sure we have at least 4-5mb stream for 1080p
quality.
https://www.youtube.com/watch?v=gJqkld_C0dk

Maybe try recording to an mp4 and compare.

BTW, I haven't heard from you in 2 years!   Are you still doing the MIT
thing? Ping me offline maybe.



On Tue, May 1, 2018 at 9:10 PM, Charlie DeTar <cfd-fs at fohn.org> wrote:

> Hi,
>
> I'm trying to broadcast multiparty audio and video through youtube, using
> this stack:
>
>   Browser (Chrome) -> Custom webapp using Verto -> mod_conference ->
> record to rtmp -> youtube live
>
> However, I'm getting poor audio quality on youtube in the live broadcast.
> Here's an example (this video is screen-capped from the live player,
> because youtube seems to clean up the recorded file after the fact.  I've
> tested with multiple computers/browsers that this is how it sounds to
> everyone during the live broadcast.):
> https://youtu.be/bO8t78YXxjc
>
> That is using the "Low Latency" setting in youtube.  The
> conference.conf.xml "interval" parameter seems to also have an effect; I
> have it set to 10 here as that seemed to get fewer pops than the default 20.
>
> Using youtube's "Ultra-low latency" setting, things are even worse:
> https://youtu.be/ShuitSWYy5A
>
> The "Normal latency" setting is better, but still has more frequent
> popping than I'd like:
> https://youtu.be/cyZQTWDctEs
>
> The same configuration when pointed at UStream endpoint instead of YouTube
> produces fine audio quality (the following example is screencapped from a
> live ustream player then uploaded to youtube):
> https://www.youtube.com/watch?v=Ng9boh_5_ik
>
> I've been trying to tweak all of the audio parameters I can find to
> discern some magic combination that makes youtube happy -- but I haven't
> been able to find something that gets rid of the popping.  The fact that
> UStream likes the audio just fine tells me that there's some
> incompatibility between freeswitch's stream and youtube, and not just
> brokenness on the webrtc or mux setup.  I've tried 48kHZ, 44.1kHz, and
> lower; stereo and mono; various interval settings; and a lot of other
> parameters that appear to be unrelated (does rtmp.conf.xml get involved in
> recording a conference at all, or is that just for incoming rtmp calls?).
>
>
> Any ideas on what I might need to change to make freeswitch-to-youtube
> live audio smooth?
>
>
> The following is my conference.conf.xml in its entirety.  Happy to share
> other configs if helpful.
>
> <!-- http://wiki.freeswitch.org/wiki/Mod_conference -->
> <!-- None of these paths are real if you want any of these options you
> need to really set them up -->
> <configuration name="conference.conf" description="Audio Conference">
>   <!-- Advertise certain presence on startup . -->
>   <advertise>
>     <room name="3001@$${domain}" status="FreeSWITCH"/>
>   </advertise>
>
>   <!-- These are the default keys that map when you do not specify a
> caller control group -->
>   <!-- Note: none and default are reserved names for group names.
> Disabled if dist-dtmf member flag is set. -->
>   <caller-controls>
>     <group name="default">
>       <control action="deaf mute" digits="**"/>
>   <control action="mute" digits="0"/>
>   <control action="vmute" digits="*0"/>
>   <control action="vmute snap" digits="*1"/>
>   <control action="vmute snapoff" digits="*2"/>
>   <control action="energy up" digits="9"/>
>   <control action="energy equ" digits="8"/>
>    <control action="energy dn" digits="7"/>
>   <control action="vol talk up" digits="3"/>
>   <control action="vol talk zero" digits="2"/>
>   <control action="vol talk dn" digits="1"/>
>   <control action="vol listen up" digits="6"/>
>   <control action="vol listen zero" digits="5"/>
>   <control action="vol listen dn" digits="4"/>
>   <control action="hangup" digits="#"/>
>   </group>
>   </caller-controls>
>
>   <!-- Profiles are collections of settings you can reference by name. -->
>   <profiles>
>     <profile name="plenary-conference-profile">
>       <param name="domain" value="$${domain}"/>
>       <param name="rate" value="44100"/>
>       <param name="channels" value="2"/>
>       <param name="interval" value="10"/>
>       <param name="interval" value="10"/>
>       <param name="energy-level" value="0"/>
>
>       <!-- <param name="tts-engine" value="flite"/> -->
>       <!-- <param name="tts-voice" value="kal16"/> -->
>       <param name="muted-sound" value="conference/conf-muted.wav"/>
>       <param name="unmuted-sound" value="conference/conf-unmuted.wav"/>
>       <!--
>         Concatenate some silence on the front of conf-alone so it doesn't
> get
>         cut off as it usually does. Syntax:
>         http://lists.freeswitch.org/pipermail/freeswitch-users/
> 2013-February/093019.html
>       -->
>
>       <!--
>         Disable these sounds
>       <param name="alone-sound" value="file_string://silence_
> stream://5000!conference/conf-alone.wav"/>
>       <param name="enter-sound" value="tone_stream://%(200,0,
> 500,600,700)"/>
>       <param name="exit-sound" value="tone_stream://%(500,0,
> 300,200,100,50,25)"/>
>       <param name="kicked-sound" value="conference/conf-kicked.wav"/>
>       <param name="locked-sound" value="conference/conf-locked.wav"/>
>       <param name="is-locked-sound" value="conference/conf-is-
> locked.wav"/>
>       <param name="is-unlocked-sound" value="conference/conf-is-
> unlocked.wav"/>
>       <param name="pin-sound" value="conference/conf-pin.wav"/>
>       <param name="bad-pin-sound" value="conference/conf-bad-pin.wav"/>
>       -->
>       <param name="moh-sound" value="silence"/>
>       <param name="comfort-noise" value="0"/>
>
>       <param name="caller-id-name" value="$${outbound_caller_name}"/>
>       <param name="caller-id-number" value="$${outbound_caller_id}"/>
>       <param name="conference-flags" value="livearray-sync|
> minimize-video-encoding|livearray-json-status"/>
>
>       <!-- video params -->
>       <param name="video-mode" value="mux"/>
>       <param name="video-layout-name" value="overlaps-with-floor"/>
>       <param name="video-auto-floor-msec" value='10' />
>       <!--<param name="video-canvas-size" value="1920x1080"/>-->
>       <param name="video-canvas-size" value="1280x720"/>
>       <param name="video-canvas-bgcolor" value="#333333"/>
>       <param name="video-layout-bgcolor" value="#000000"/>
>       <param name="video-codec-bandwidth" value="5mb"/>
>       <param name="video-fps" value="30" />
>
>       <param name='auto-record' value='rtmp://a.rtmp.youtube.com/live2/<...
> youtube secret streaming key ...>'/>
>       <param name='min-required-recording-participants' value='1'/>
>     </profile>
>   </profiles>
> </configuration>
>
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-- 
Anthony Minessale II
Founder, FreeSWITCH.
http://freeswitch.com


https://youtu.be/l_hOxzCt6X4
https://www.youtube.com/watch?v=oAxXgyx5jUw
https://www.youtube.com/watch?v=9XXgW34t40s
https://www.youtube.com/watch?v=NLaDpGQuZDA
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