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pasingshot  
#1 Posted : Friday, February 3, 2017 12:16:28 PM(UTC)
pasingshot

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Hi all, I'm using latest version of vMix in trial mode, I'm having some troubles with stream signal quality, I'm seeing many of your broadcast on youtube and the quality is very very high and perfect and I cannot get similar quality. This is a broadcast made last night: Click here as you can see the quality is very poor and do not know why.

My setup is:
Elgato gaming HD60PRO capture card
intel i7 3.4GHz
8gb RAM
1TB HDD
Gigabyte GTX960 4GB

The captured signal is 1080 60fps by elgato gaming card from other PC, output size in vMix is 1080p and in streaming settings is 1280x720 60fps with 6000Mbps bitrate and 128kb audio.

Before writing this post I have realized that the video profile was in baseline with what I thought that changing that option to "high" the quality of the broadcast would be much better but I have verified that it is not so. I know it's very likely a vMix configuration problem but I can not figure out where the configuration fault is.

Can anyone help me with this problem?

Thanks in advance.
DWAM  
#2 Posted : Friday, February 3, 2017 12:27:15 PM(UTC)
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Hi

it seems ok for me. Are you sure you're playing YT video with HD720 selected in the player?
pasingshot  
#3 Posted : Friday, February 3, 2017 12:36:11 PM(UTC)
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Hi! Thanks for your reply, I'm sure, some people comented in broadcast chat about poor quality. Here you can see a broadcast made with OBS and monitor captured by OBS Race Video Click Here
DWAM  
#4 Posted : Friday, February 3, 2017 12:53:59 PM(UTC)
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I don't really see a difference, both are ok.

Are you sure these people have enough bandwidth and can play HD720p60 streams? Not everybody can play 60 frames by seconds, you know...

Give us your encoding settings if you want we drop an eye on them
Bandit62  
#5 Posted : Friday, February 3, 2017 2:12:20 PM(UTC)
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quality look great here....wish I was having such good quality
Siroki  
#6 Posted : Friday, February 3, 2017 3:27:10 PM(UTC)
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pasingshot wrote:
Hi! Thanks for your reply, I'm sure, some people comented in broadcast chat about poor quality. Here you can see a broadcast made with OBS and monitor captured by OBS Race Video Click Here


did you put fmle or ffmpeg in streaming settings?
al4video  
#7 Posted : Monday, February 6, 2017 12:00:31 PM(UTC)
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It actually looks like on the OBS video you had perfect filming conditions. Less bright sun, slightly overcast even light. That seems to be the difference.
pasingshot  
#8 Posted : Monday, February 6, 2017 1:06:32 PM(UTC)
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DWAM wrote:
I don't really see a difference, both are ok.

Are you sure these people have enough bandwidth and can play HD720p60 streams? Not everybody can play 60 frames by seconds, you know...

Give us your encoding settings if you want we drop an eye on them


I see the difference, trust in me ;) allready I finally find the problem, the capture card was capturing in 720p60, vMix configured to 1080p60 and streaming in 720p60 again and this is the problem I think, I made some test and I think all is ok now, in two weeks if you want I put the video here to watch it.

Thanks.
pasingshot  
#9 Posted : Monday, February 6, 2017 1:07:36 PM(UTC)
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Siroki wrote:
pasingshot wrote:
Hi! Thanks for your reply, I'm sure, some people comented in broadcast chat about poor quality. Here you can see a broadcast made with OBS and monitor captured by OBS Race Video Click Here


did you put fmle or ffmpeg in streaming settings?


In ffmpeg
pasingshot  
#10 Posted : Monday, February 6, 2017 1:10:45 PM(UTC)
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al4video wrote:
It actually looks like on the OBS video you had perfect filming conditions. Less bright sun, slightly overcast even light. That seems to be the difference.


The conditions normally are the same, the weather is configurable in the game options, you know that the broadcast video is a videogame, true? In the case that you thinked that was a real car race I love it! Thats means that our job go in the right way ;)

Thanks for your comment
Mathijs  
#11 Posted : Monday, February 6, 2017 8:31:38 PM(UTC)
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Your footage is not very compression friendly, so I think the result is not that bad at all.
Because you are constantly panning, there is no pixel the same at the next shot.

Watch this

pasingshot  
#12 Posted : Friday, February 10, 2017 6:20:40 AM(UTC)
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Very interesting, thanks! But I made some tests with bitrate, maybe I'm wrong on some settings but I cannot see too much changes in the quality on YouTube nevertheless I made some broadcasts tests on Twitch and the image quality is much better than YouTube with only 6000 to 10000 of bitrate.
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