Running latest version of OBS Studio on 2020 MacBook Pro 13-inch. Have tried both available software encoders, and hardware encoder, and same failure occurs encoders. Uploading to YouTube server. Streaming timer is verified NOT enabled under Tools in OBS.
10:26:36.784: ==== Streaming Start ===============================================
10:26:36.784: [ffmpeg hls muxer: 'adv_stream'] Writing to path 'https://a.upload.youtube.com/http_upload_hls?cid={stream_key}©=0&file=out.m3u8'...
Several scene changes here
10:57:06.875: User switched to scene 'Live Feed'
11:24:52.641: User switched to scene 'Song 6'
11:26:41.927: [ffmpeg muxer: 'adv_stream'] os_process_pipe_write for packet data failed
11:26:41.927: [ffmpeg muxer: 'adv_stream'] Output of file 'https://a.upload.youtube.com/http_upload_hls?cid={stream_key}©=0&file=out.m3u8' stopped
11:26:41.927: Output 'adv_stream': stopping
11:26:41.927: Output 'adv_stream': Total frames output: 108128
11:26:41.927: Output 'adv_stream': Total drawn frames: 108155
11:26:41.930: ==== Streaming Stop ================================================
11:26:41.983: ==== Streaming Stop ================================================
11:26:55.583: ==== Shutting down ==================================================
11:26:55.600: [obs-ndi] audio thread for 'NDI™ Source' completed
11:26:55.647: fill_buffer: AudioQueueEnqueueBuffer failed: -66632
11:26:55.647: fill_buffer: Failed to enqueue buffer
11:26:55.679: All scene data cleared
Previously on 1/24/21
0:16:03.198: ==== Streaming Start ===============================================
10:16:03.198: [ffmpeg hls muxer: 'adv_stream'] Writing to path 'https://a.upload.youtube.com/http_upload_hls?cid={stream_key}©=0&file=out.m3u8'...
10:28:28.056: User switched to scene 'Live Feed'
10:36:18.065: User switched to scene 'Song 1'
10:38:37.868: User switched to scene 'Live Feed'
10:47:39.628: User switched to scene 'Song 2'
10:49:35.745: User switched to scene 'Song 3'
10:52:21.349: User switched to scene 'Live Feed'
11:16:07.457: [ffmpeg muxer: 'adv_stream'] os_process_pipe_write for packet data failed
11:16:07.457: [ffmpeg muxer: 'adv_stream'] Output of file 'https://a.upload.youtube.com/http_upload_hls?cid={stream_key}©=0&file=out.m3u8' stopped
11:16:07.457: Output 'adv_stream': stopping
11:16:07.458: Output 'adv_stream': Total frames output: 108122
11:16:07.458: Output 'adv_stream': Total drawn frames: 108130 (108134 attempted)
11:16:07.458: Output 'adv_stream': Number of lagged frames due to rendering lag/stalls: 4 (0.0%)
11:16:07.460: ==== Streaming Stop ================================================
11:16:07.508: ==== Streaming Stop ================================================
11:16:16.010: ==== Shutting down ==================================================
11:16:16.060: fill_buffer: AudioQueueEnqueueBuffer failed: -66632
11:16:16.060: fill_buffer: Failed to enqueue buffer
11:16:16.088: [obs-ndi] audio thread for 'NDI™ Source' completed
11:16:16.122: All scene data cleared
10:26:36.784: ==== Streaming Start ===============================================
10:26:36.784: [ffmpeg hls muxer: 'adv_stream'] Writing to path 'https://a.upload.youtube.com/http_upload_hls?cid={stream_key}©=0&file=out.m3u8'...
Several scene changes here
10:57:06.875: User switched to scene 'Live Feed'
11:24:52.641: User switched to scene 'Song 6'
11:26:41.927: [ffmpeg muxer: 'adv_stream'] os_process_pipe_write for packet data failed
11:26:41.927: [ffmpeg muxer: 'adv_stream'] Output of file 'https://a.upload.youtube.com/http_upload_hls?cid={stream_key}©=0&file=out.m3u8' stopped
11:26:41.927: Output 'adv_stream': stopping
11:26:41.927: Output 'adv_stream': Total frames output: 108128
11:26:41.927: Output 'adv_stream': Total drawn frames: 108155
11:26:41.930: ==== Streaming Stop ================================================
11:26:41.983: ==== Streaming Stop ================================================
11:26:55.583: ==== Shutting down ==================================================
11:26:55.600: [obs-ndi] audio thread for 'NDI™ Source' completed
11:26:55.647: fill_buffer: AudioQueueEnqueueBuffer failed: -66632
11:26:55.647: fill_buffer: Failed to enqueue buffer
11:26:55.679: All scene data cleared
Previously on 1/24/21
0:16:03.198: ==== Streaming Start ===============================================
10:16:03.198: [ffmpeg hls muxer: 'adv_stream'] Writing to path 'https://a.upload.youtube.com/http_upload_hls?cid={stream_key}©=0&file=out.m3u8'...
10:28:28.056: User switched to scene 'Live Feed'
10:36:18.065: User switched to scene 'Song 1'
10:38:37.868: User switched to scene 'Live Feed'
10:47:39.628: User switched to scene 'Song 2'
10:49:35.745: User switched to scene 'Song 3'
10:52:21.349: User switched to scene 'Live Feed'
11:16:07.457: [ffmpeg muxer: 'adv_stream'] os_process_pipe_write for packet data failed
11:16:07.457: [ffmpeg muxer: 'adv_stream'] Output of file 'https://a.upload.youtube.com/http_upload_hls?cid={stream_key}©=0&file=out.m3u8' stopped
11:16:07.457: Output 'adv_stream': stopping
11:16:07.458: Output 'adv_stream': Total frames output: 108122
11:16:07.458: Output 'adv_stream': Total drawn frames: 108130 (108134 attempted)
11:16:07.458: Output 'adv_stream': Number of lagged frames due to rendering lag/stalls: 4 (0.0%)
11:16:07.460: ==== Streaming Stop ================================================
11:16:07.508: ==== Streaming Stop ================================================
11:16:16.010: ==== Shutting down ==================================================
11:16:16.060: fill_buffer: AudioQueueEnqueueBuffer failed: -66632
11:16:16.060: fill_buffer: Failed to enqueue buffer
11:16:16.088: [obs-ndi] audio thread for 'NDI™ Source' completed
11:16:16.122: All scene data cleared