Every weekend, we have been streaming to a rmtp service (DaCast) and after about an hour, we begin simulcasting to Facebook live.

To our knowledge, we haven't changed a thing in settings in either vMix or Facebook. Last weekend, when we started up the stream
on Facebook, it lasted about twenty seconds and crashed.

We tried multiple times to get it to play nice, but it kept crashing.

Here is the log of the last attempt:

ffmpeg started on 2020-09-26 at 16:54:22
Report written to "C:\ProgramData\vMix\streaming\streaming2 20200926-165422.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 1280x720 -pix_fmt:v yuv420p -threads 4 -bufsize:v 1500k -g:v 60 -preset:v veryfast -profile:v baseline -level:v 3.1 -b:v 1500k -maxrate:v 1650k -codec:a aac -b:a 128k -strict -2 -rtmp_flashver "FMLE/3.0 (compatible; vMix/23.0.0.62)" -f flv "rtmps://live-api-s.facebook.com:443/rtmp/171121904602286?s_bl=1&s_psm=1&s_sc=171121937935616&s_sw=0&s_vt=api-s&a=Abw3nbVAN_vfeTBU"
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: 15094.235000, bitrate: 1536 kb/s
Stream #0:0: Video: rawvideo (YV12 / 0x32315659), yuv420p, 1280x720, 30 fps, 30 tbr, 10000k tbn, 10000k tbc
Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
[tcp @ 0af9b700] TCP Buffer has been set to 4070400 bytes
Stream mapping:
Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (pcm_s16le (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 0af97400] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0af97400] profile Constrained Baseline, level 3.1
[libx264 @ 0af97400] 264 - core 152 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=2 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=4 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=60 keyint_min=6 scenecut=40 intra_refresh=0 rc_lookahead=10 rc=abr mbtree=1 bitrate=1500 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=1650 vbv_bufsize=1500 nal_hrd=none filler=0 ip_ratio=1.40 aq=1:1.00
Output #0, flv, to 'rtmps://live-api-s.facebook.com:443/rtmp/171121904602286?s_bl=1&s_psm=1&s_sc=171121937935616&s_sw=0&s_vt=api-s&a=Abw3nbVAN_vfeTBU':
Metadata:
encoder : Lavf57.82.101
Stream #0:0: Video: h264 (libx264) ([7][0][0][0] / 0x0007), yuv420p, 1280x720, q=-1--1, 1500 kb/s, 30 fps, 1k tbn, 30 tbc
Metadata:
encoder : Lavc57.106.101 libx264
Side data:
cpb: bitrate max/min/avg: 1650000/0/1500000 buffer size: 1500000 vbv_delay: -1
Stream #0:1: Audio: aac (LC) ([10][0][0][0] / 0x000A), 48000 Hz, stereo, fltp, 128 kb/s
Metadata:
encoder : Lavc57.106.101 aac
frame= 39 fps=0.0 q=20.0 size= 74kB time=00:00:01.27 bitrate= 473.3kbits/s speed=2.54x
frame= 54 fps= 53 q=16.0 size= 122kB time=00:00:01.79 bitrate= 557.2kbits/s speed=1.77x
frame= 69 fps= 46 q=13.0 size= 163kB time=00:00:02.28 bitrate= 586.9kbits/s speed=1.51x
frame= 84 fps= 42 q=14.0 size= 264kB time=00:00:02.79 bitrate= 774.9kbits/s speed=1.38x
frame= 99 fps= 39 q=11.0 size= 291kB time=00:00:03.30 bitrate= 722.1kbits/s speed=1.31x
frame= 114 fps= 38 q=9.0 size= 325kB time=00:00:03.81 bitrate= 698.5kbits/s speed=1.26x
frame= 130 fps= 37 q=8.0 size= 359kB time=00:00:04.30 bitrate= 682.4kbits/s speed=1.22x
frame= 145 fps= 36 q=8.0 size= 475kB time=00:00:04.79 bitrate= 811.0kbits/s speed=1.19x
frame= 160 fps= 35 q=6.0 size= 505kB time=00:00:05.31 bitrate= 779.6kbits/s speed=1.17x
frame= 175 fps= 35 q=4.0 size= 532kB time=00:00:05.80 bitrate= 750.9kbits/s speed=1.15x
frame= 190 fps= 34 q=8.0 size= 548kB time=00:00:06.31 bitrate= 711.5kbits/s speed=1.14x
frame= 205 fps= 34 q=5.0 size= 667kB time=00:00:06.82 bitrate= 800.9kbits/s speed=1.13x
frame= 220 fps= 34 q=3.0 size= 703kB time=00:00:07.33 bitrate= 785.0kbits/s speed=1.12x
frame= 235 fps= 33 q=2.0 size= 733kB time=00:00:07.82 bitrate= 767.2kbits/s speed=1.11x
frame= 250 fps= 33 q=8.0 size= 758kB time=00:00:08.33 bitrate= 744.8kbits/s speed= 1.1x
frame= 265 fps= 33 q=5.0 size= 878kB time=00:00:08.85 bitrate= 813.2kbits/s speed= 1.1x
frame= 281 fps= 33 q=2.0 size= 918kB time=00:00:09.34 bitrate= 805.3kbits/s speed=1.09x
frame= 296 fps= 33 q=2.0 size= 951kB time=00:00:09.85 bitrate= 790.8kbits/s speed=1.08x
frame= 311 fps= 32 q=8.0 size= 974kB time=00:00:10.36 bitrate= 769.4kbits/s speed=1.08x
frame= 326 fps= 32 q=5.0 size= 1099kB time=00:00:10.87 bitrate= 827.7kbits/s speed=1.08x
frame= 341 fps= 32 q=2.0 size= 1134kB time=00:00:11.36 bitrate= 816.9kbits/s speed=1.07x
frame= 356 fps= 32 q=2.0 size= 1168kB time=00:00:11.85 bitrate= 806.6kbits/s speed=1.07x
frame= 372 fps= 32 q=8.0 size= 1191kB time=00:00:12.37 bitrate= 788.6kbits/s speed=1.07x
frame= 386 fps= 32 q=5.0 size= 1317kB time=00:00:12.88 bitrate= 837.6kbits/s speed=1.06x
frame= 402 fps= 32 q=2.0 size= 1354kB time=00:00:13.39 bitrate= 827.8kbits/s speed=1.06x
frame= 417 fps= 32 q=2.0 size= 1387kB time=00:00:13.88 bitrate= 818.5kbits/s speed=1.06x
frame= 432 fps= 32 q=8.0 size= 1408kB time=00:00:14.39 bitrate= 801.2kbits/s speed=1.06x
frame= 447 fps= 32 q=5.0 size= 1537kB time=00:00:14.91 bitrate= 844.5kbits/s speed=1.05x
frame= 462 fps= 32 q=2.0 size= 1570kB time=00:00:15.40 bitrate= 835.0kbits/s speed=1.05x
frame= 478 fps= 32 q=2.0 size= 1605kB time=00:00:15.91 bitrate= 826.4kbits/s speed=1.05x
frame= 493 fps= 32 q=13.0 size= 1624kB time=00:00:16.40 bitrate= 810.9kbits/s speed=1.05x
frame= 508 fps= 31 q=4.0 size= 1755kB time=00:00:16.93 bitrate= 848.9kbits/s speed=1.05x
frame= 523 fps= 31 q=2.0 size= 1785kB time=00:00:17.42 bitrate= 839.2kbits/s speed=1.05x
frame= 538 fps= 31 q=2.0 size= 1816kB time=00:00:17.93 bitrate= 829.2kbits/s speed=1.04x
frame= 553 fps= 31 q=13.0 size= 1833kB time=00:00:18.45 bitrate= 813.7kbits/s speed=1.04x
frame= 569 fps= 31 q=4.0 size= 1967kB time=00:00:18.94 bitrate= 850.6kbits/s speed=1.04x
frame= 584 fps= 31 q=2.0 size= 1995kB time=00:00:19.45 bitrate= 840.1kbits/s speed=1.04x
frame= 599 fps= 31 q=2.0 size= 2026kB time=00:00:19.96 bitrate= 831.2kbits/s speed=1.04x
frame= 614 fps= 31 q=14.0 size= 2041kB time=00:00:20.47 bitrate= 816.5kbits/s speed=1.04x
frame= 629 fps= 31 q=4.0 size= 2175kB time=00:00:20.99 bitrate= 848.9kbits/s speed=1.04x
frame= 645 fps= 31 q=2.0 size= 2205kB time=00:00:21.48 bitrate= 841.1kbits/s speed=1.04x
frame= 660 fps= 31 q=2.0 size= 2236kB time=00:00:21.99 bitrate= 833.0kbits/s speed=1.04x
frame= 675 fps= 31 q=14.0 size= 2249kB time=00:00:22.48 bitrate= 819.6kbits/s speed=1.03x
frame= 690 fps= 31 q=4.0 size= 2386kB time=00:00:23.01 bitrate= 849.1kbits/s speed=1.04x
[tls @ 0af9b4e0] Writing encrypted data to socket failed
av_interleaved_write_frame(): I/O error
av_interleaved_write_frame(): I/O error
[flv @ 0af95fa0] Failed to update header with correct duration.
[flv @ 0af95fa0] Failed to update header with correct filesize.
Error writing trailer of rtmps://live-api-s.facebook.com:443/rtmp/171121904602286?s_bl=1&s_psm=1&s_sc=171121937935616&s_sw=0&s_vt=api-s&a=Abw3nbVAN_vfeTBU: I/O error
frame= 701 fps= 31 q=2.0 Lsize= 2403kB time=00:00:23.37 bitrate= 842.1kbits/s speed=1.03x
video:2367kB audio:7kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.232914%
[tls @ 0af9b4e0] Writing encrypted data to socket failed
[tls @ 0af9b4e0] Writing encrypted data to socket failed
[tls @ 0af9b4e0] Failed to send close message
[libx264 @ 0af97400] frame I:12 Avg QP: 4.19 size: 77888
[libx264 @ 0af97400] frame P:689 Avg QP: 2.21 size: 2201
[libx264 @ 0af97400] mb I I16..4: 61.0% 0.0% 39.0%
[libx264 @ 0af97400] mb P I16..4: 0.2% 0.0% 0.0% P16..4: 6.9% 0.1% 0.0% 0.0% 0.0% skip:92.8%
[libx264 @ 0af97400] coded y,uvDC,uvAC intra: 43.9% 46.3% 42.4% inter: 2.7% 1.5% 1.1%
[libx264 @ 0af97400] i16 v,h,dc,p: 71% 18% 8% 3%
[libx264 @ 0af97400] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 45% 31% 10% 2% 3% 2% 2% 2% 3%
[libx264 @ 0af97400] i8c dc,h,v,p: 59% 19% 20% 2%
[libx264 @ 0af97400] kb/s:839.08
[aac @ 0af99800] Qavg: 65536.000
Conversion failed!


We have made sure we are using the latest version of vMix....

I've looked around in the forums and have found posts with this issue, but nobody posted a fix (that I could find)

We really need this to work. Church service.