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geekazine  
#1 Posted : Thursday, November 21, 2024 2:06:38 AM(UTC)
geekazine

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So vMix is giving me an I/O error whenever I try to stream out. This is to YouTube, but I tried others - I originally started trying to stream with Restream and got the error.

I know this is an internal issue, so I disabled the firewall and the problem didn't go away.

Streaming through other programs (OBS, Wirecast) is not an issue, so it's definitely located in some vMix setting.

I am short of re-installing vMix, but I thought I'd come here to see if there is anyone that has an idea of what's going on.

ffmpeg started on 2024-11-20 at 09:54:45
Report written to "C:\ProgramData\vMix\streaming\streaming1 20241120-095445.log"
Command line:
"C:\\Program Files (x86)\\vMix\\streaming\\ffmpeg2.exe" -report -rtbufsize 128M -f dshow -i "video=vMix Video YV12:audio=vMix Audio" -codec:v libx264 -s:v 1920x1080 -pix_fmt:v yuv420p -threads 4 -bufsize:v 4500k -g:v 120 -preset:v veryfast -profile:v baseline -level:v 3.1 -b:v 4500k -maxrate:v 4950k -codec:a aac -b:a 128k -strict -2 -rtmp_flashver "FMLE/3.0 (compatible; vMix/27.0.0.88)" -f flv rtmp://a.rtmp.youtube.com/live2/secret-key -codec:v h264_nvenc -s:v 1280x720 -pix_fmt:v yuv420p -threads 4 -bufsize:v 2800k -g:v 120 -preset:v llhq -profile:v baseline -b:v 2800k -maxrate:v 3080k -codec:a aac -b:a 128k -strict -2 -rtmp_flashver "FMLE/3.0 (compatible; vMix/27.0.0.88)" -f flv rtmp://a.rtmp.youtube.com/live2/secret-key
ffmpeg version 3.3.git Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 4.8.1 (rev2, Built by MinGW-W64 project)
configuration: --enable-gpl --enable-version3 --enable-libx264 --enable-zlib --enable-nvenc --cpu=i686
libavutil 55. 76.100 / 55. 76.100
libavcodec 57.106.101 / 57.106.101
libavformat 57. 82.101 / 57. 82.101
libavdevice 57. 8.101 / 57. 8.101
libavfilter 6.105.100 / 6.105.100
libswscale 4. 7.103 / 4. 7.103
libswresample 2. 8.100 / 2. 8.100
libpostproc 54. 6.100 / 54. 6.100
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, dshow, from 'video=vMix Video YV12:audio=vMix Audio':
Duration: N/A, start: 5243.235000, bitrate: 1536 kb/s
Stream #0:0: Video: rawvideo (YV12 / 0x32315659), yuv420p, 1920x1080, 60 fps, 60 tbr, 10000k tbn, 10000k tbc
Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
[tcp @ 05f88640] TCP Buffer has been set to 18890752 bytes
rtmp://a.rtmp.youtube.com/live2/secret-key: I/O error
admin  
#2 Posted : Thursday, November 21, 2024 12:22:22 PM(UTC)
admin

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You have multi-bitrate streaming enabled which is not supported by YouTube.
To fix go to the [2] stream and set the Destination back to None

geekazine  
#3 Posted : Thursday, November 21, 2024 12:28:53 PM(UTC)
geekazine

Rank: Newbie

Groups: Registered
Joined: 12/30/2020(UTC)
Posts: 7
United States
Location: Madison, WI

Thanks: 3 times
Interesting. Even if I choose "Start Stream 1" it still errors out? The idea was to have Restream set up on one and YouTube on the other so if I had to change quickly, I could.

That did work. Thanks.
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