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elshorbagy  
#1 Posted : Friday, May 22, 2015 11:58:17 AM(UTC)
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Hello,

I created a RTSP live stream with VLC, vMix can play the video successfully, but there is no audio at all. When I use a local video, vMix can play both video and audio, the stream works fine on another player.

stream settings:
Quote:
vcodec=h264,vb=128,scale=Auto,acodec=mpga,ab=128,channels=2,samplerate=44100



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IceStream  
#2 Posted : Friday, May 22, 2015 2:01:47 PM(UTC)
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admin  
#3 Posted : Friday, May 22, 2015 3:58:24 PM(UTC)
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Hi,

vMix only supports AAC audio for RTSP streams as per the help file:
http://www.vmixhd.com/help15/Stream.html

The acodec (audio codec) specified in that string is mpga which is a different audio codec.
Try AAC instead.

Regards,

Martin
vMix
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elshorbagy  
#4 Posted : Sunday, May 24, 2015 8:48:33 AM(UTC)
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I see, thank you very much, I'm using now RTMP instead of RTSP, the audio is working fine.
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stevespaw  
#5 Posted : Tuesday, July 21, 2015 6:56:31 PM(UTC)
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We have the same issue.

We are very successful receiving from Teradek Sputnik in both RTSP and TCP pull modes. And have used Cubes.
But we have No Audio with a new encoder we are using. Very nice, inexpensive, both SDI and HDMI model available.

I am sure that the Audio is AAC.

IF this works we want to put these in schools and churches.

stevespaw attached the following image(s):
System settings-HD Encoder - Google Chrome 7_20_2015 5_37_50 PM.png (147kb) downloaded 5 time(s).
Current Media Information 7_20_2015 5_45_53 PM.png (14kb) downloaded 6 time(s).

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stevespaw  
#6 Posted : Tuesday, July 21, 2015 7:04:21 PM(UTC)
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Here is what vMix says:


stevespaw attached the following image(s):
Audio Settings 7_20_2015 6_02_02 PM.png (7kb) downloaded 5 time(s).

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stevespaw  
#7 Posted : Saturday, July 25, 2015 11:35:23 AM(UTC)
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Sorry for the bump, but any ideas about this Martin?

We have some schools we would like to use this solution with.

Thanks,
Steve
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pm  
#8 Posted : Saturday, December 12, 2015 11:20:21 AM(UTC)
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Hi Steve

I'm testing the HDMI version of this encoder and have the same problem as you describe. VLC identifies the RTSP audio stream as AAC, but no sound in vMix.

Have you ever found a solution for the none working audio?

Regards,
Patrick
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stevespaw  
#9 Posted : Saturday, December 12, 2015 1:05:08 PM(UTC)
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No, for now we just need NAT sound from one of the cameras (we have 4 of these going from the football field to the studio) So we just run VLC on another PC and feed that audio to the audio mixer with the announcers.

I have sent an email also mentioning this issue. :-)

Steve
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pm  
#10 Posted : Sunday, December 13, 2015 3:46:46 PM(UTC)
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ok, seems a good alternative for the non working RTSP audio.

I did some further analysis on the stream. If I "restream" the original RTSP stream with VLC as a new RTSP stream, then audio is working in vMix. Doing some further research with ffprobe (part of ffmpeg framework) I discovered:

Original stream without audio in vMix:
Stream #0:0: Video: h264 (Baseline), yuv420p, 1920x1080, 25 tbr, 90k tbn, 180k tbc
Stream #0:1: Audio: aac, 48000 Hz, stereo, fltp
No metadata

Restream from VLC (no transcoding) with audio in vMix:
Stream #0:0: Audio: aac, 48000 Hz, stereo, fltp
Stream #0:1: Video: h264 (Baseline), yuv420p, 1920x1080, 25 tbr, 90k tbn, 180k tbc
Plus some metadata (title and comment)

Perhaps it has something to do with the internal order of audio and video data in the stream or the missing metadata...


I'm evaluating vMix for sports production as a full IP based solution. And it seems that you're already doing what I'm planning to do...

How stable are the RTSP streams in your setup? Do you use UDP or TCP? Are the four streams in sync or do you have to delay one or multiple of them (I saw that the delay option in input settings is grayed out for streams...)?

I'm quite new to the forum, so if you don't want to share your production secrets, it would be understandable ;-)

Regards,
Patrick
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stevespaw  
#11 Posted : Wednesday, April 13, 2016 12:46:48 PM(UTC)
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stevespaw wrote:
We have the same issue.

We are very successful receiving from Teradek Sputnik in both RTSP and TCP pull modes. And have used Cubes.
But we have No Audio with a new encoder we are using. Very nice, inexpensive, both SDI and HDMI model available.

I am sure that the Audio is AAC.

IF this works we want to put these in schools and churches.




Just wanted to post that we now have Audio from this box in vMix 17 !!!
we had to have a workaround by using the Audio from a VLC player. Now we have Lip Sync!

4 Cameras coming in a 10 Mbs from the Stadium to the School control room with Audio, Now we can send ISO and program back via NDI to the Stadium watching on a Tablet with NDI monitor.

Steve
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