Problems streaming SRT output in Listener Mode

[matthewjdumas]

For the last few days I've been trying to stream my OBS scene as an SRT output to be consumed by a friend's OBS instance so we can do a PIP video together for his twitch streams. Here's the setup:

Rx PC: Media Source configured to: srt://<<IP of TX PC>>:10001?mode=caller&transtype=live&latency=120000, input format: mpegts transport, 0MB network buffer (IP is a NoIP DNS)

Tx PC: Stream output Server: srt://192.168.1.2:10001?mode=listener&transtype=live&latency=120000, no streamkey set, output 2500kbps, encoder NVENC, Keyframe interval 1, Audio set to defaults, router setup to forward 9999 to 10020 to the Tx PC,

Every time I start streaming on the TX, I get popups in the bottom right corner saying OBS Disconnected, 10 seconds later, OBS Reconnected, and then it immediately disconnects.

The log looks like this:

17:02:16.109: [jim-nvenc: 'simple_h264_stream'] settings:
17:02:16.109: rate_control: CBR
17:02:16.109: bitrate: 3000
17:02:16.109: cqp: 20
17:02:16.109: keyint: 250
17:02:16.109: preset: hq
17:02:16.109: profile: high
17:02:16.109: width: 1920
17:02:16.109: height: 1080
17:02:16.109: 2-pass: false
17:02:16.109: b-frames: 2
17:02:16.109: lookahead: false
17:02:16.109: psycho_aq: true
17:02:16.109:
17:02:16.120: ---------------------------------
17:02:16.121: [FFmpeg aac encoder: 'simple_aac'] bitrate: 160, channels: 2, channel_layout: 3
17:02:16.121:
17:02:16.130: ==== Streaming Start ===============================================
17:02:16.130: [ffmpeg muxer: 'simple_stream'] Writing file 'srt://192.168.1.2:10001?mode=listener&transtype=live&latency=2000000'...
17:02:17.332: [ffmpeg muxer: 'simple_stream'] os_process_pipe_write for packet data failed
17:02:17.333: [ffmpeg muxer: 'simple_stream'] ffmpeg-mux: Couldn't open 'srt://192.168.1.2:10001?mode=listener&transtype=live&latency=2000000', Error number -10048 occurred
17:02:17.333: Couldn't initialize muxer
17:02:17.333:
17:02:17.334: [ffmpeg muxer: 'simple_stream'] Output of file 'srt://192.168.1.2:10001?mode=listener&transtype=live&latency=2000000' stopped
17:02:17.334: Output 'simple_stream': stopping
17:02:17.334: Output 'simple_stream': Total frames output: 1
17:02:17.334: Output 'simple_stream': Total drawn frames: 72
17:02:17.334: Output 'simple_stream': Reconnecting in 10 seconds..
17:02:17.389: warning: 2 frames left in the queue on closing
17:02:27.396: [jim-nvenc: 'simple_h264_stream'] settings:
17:02:27.396: rate_control: CBR
17:02:27.396: bitrate: 3000
17:02:27.396: cqp: 20
17:02:27.396: keyint: 250
17:02:27.396: preset: hq
17:02:27.396: profile: high
17:02:27.396: width: 1920
17:02:27.396: height: 1080
17:02:27.396: 2-pass: false
17:02:27.396: b-frames: 2
17:02:27.396: lookahead: false
17:02:27.396: psycho_aq: true
17:02:27.396:
17:02:27.408: ---------------------------------
17:02:27.408: [FFmpeg aac encoder: 'simple_aac'] bitrate: 160, channels: 2, channel_layout: 3
17:02:27.408:
17:02:27.413: [ffmpeg muxer: 'simple_stream'] Writing file 'srt://192.168.1.2:10001?mode=listener&transtype=live&latency=2000000'...
17:02:28.632: [ffmpeg muxer: 'simple_stream'] os_process_pipe_write for packet data failed
17:02:28.632: [ffmpeg muxer: 'simple_stream'] ffmpeg-mux: Couldn't open 'srt://192.168.1.2:10001?mode=listener&transtype=live&latency=2000000', Error number -10048 occurred
17:02:28.632: Couldn't initialize muxer
17:02:28.632:
17:02:28.633: [ffmpeg muxer: 'simple_stream'] Output of file 'srt://192.168.1.2:10001?mode=listener&transtype=live&latency=2000000' stopped
17:02:28.633: Output 'simple_stream': stopping
17:02:28.633: Output 'simple_stream': Total frames output: 1
17:02:28.633: Output 'simple_stream': Total drawn frames: 73
17:02:28.633: Output 'simple_stream': Reconnecting in 10 seconds..
17:02:28.688: warning: 2 frames left in the queue on closing
17:02:40.143: ==== Shutting down ==================================================

Am I doing something wrong here? Does OBS support SRT Stream output as listener?

When I set up OBS on a different PC and set the media source to listener and the stream to caller it works perfectly. I can't do that in this case, because the receiver doesn't have control over his router currently.