I just received the error as well, running 1.134.5271. pertinent logs below:
Aug 01, 2018 13:53:23.934 [8712] DEBUG - Asked for segment 185 from session.
Aug 01, 2018 13:53:23.934 [8712] DEBUG - Returning segment 185 from session: "K:\PlexTrancodingTemp\Transcode\Sessions\plex-transcode-64uwkt5xcy2h4br6382gmtvg-540b1e06-28c6-42ef-945f-9fb02b7fdd95\chunk-stream0-00186.m4s"
Aug 01, 2018 13:53:23.934 [8712] VERBOSE - [IDLE] Adding (0->1) work item http_download - /video/:/transcode/universal/dash/64uwkt5xcy2h4br6382gmtvg/0/185.m4s
Aug 01, 2018 13:53:23.934 [8712] VERBOSE - [IDLE] * http_download - /player/proxy/poll?deviceClass=pc&protocolVersion=1&protocolCapabilities=timeline%2Cplayback%2Cnavigation%2Cmirror%2Cplayqueues&timeout=1&X-Plex-Product=Plex%20Web&X-Plex-Version=3.53.7&X-Plex-Client-Identifier=v8m5o3ewdoi0aw6qpm83rjbz&X-Plex-Platform=Chrome&X-Plex-Platform-Version=67.0&X-Plex-Sync-Version=2&X-Plex-Device=Windows&X-Plex-Device-Name=Chrome&X-Plex-Device-Screen-Resolution=1920x926%2C1920x1080&X-Plex-Token=szg7mk9HExD9xJQ5Egyj&X-Plex-Language=en - 1 active item(s)
Aug 01, 2018 13:53:23.934 [8712] VERBOSE - [IDLE] * http_download - /video/:/transcode/universal/dash/64uwkt5xcy2h4br6382gmtvg/0/185.m4s - 1 active item(s)
Aug 01, 2018 13:53:23.934 [8712] VERBOSE - [IDLE] * transcoder - 64uwkt5xcy2h4br6382gmtvg - 1 active item(s)
Aug 01, 2018 13:53:23.934 [8712] DEBUG - Content-Length of K:\PlexTrancodingTemp\Transcode\Sessions\plex-transcode-64uwkt5xcy2h4br6382gmtvg-540b1e06-28c6-42ef-945f-9fb02b7fdd95\init-stream0.m4s,K:\PlexTrancodingTemp\Transcode\Sessions\plex-transcode-64uwkt5xcy2h4br6382gmtvg-540b1e06-28c6-42ef-945f-9fb02b7fdd95\chunk-stream0-00186.m4s is 809983.
Aug 01, 2018 13:53:23.939 [7724] DEBUG - Completed: [127.0.0.1:49996] 200 GET /video/:/transcode/universal/dash/64uwkt5xcy2h4br6382gmtvg/0/185.m4s (7 live) GZIP 6ms 809983 bytes (pipelined: 83)
Aug 01, 2018 13:53:23.939 [7724] VERBOSE - [IDLE] Removing (1->0) work item http_download - /video/:/transcode/universal/dash/64uwkt5xcy2h4br6382gmtvg/0/185.m4s
Aug 01, 2018 13:53:23.939 [7724] VERBOSE - [IDLE] * http_download - /player/proxy/poll?deviceClass=pc&protocolVersion=1&protocolCapabilities=timeline%2Cplayback%2Cnavigation%2Cmirror%2Cplayqueues&timeout=1&X-Plex-Product=Plex%20Web&X-Plex-Version=3.53.7&X-Plex-Client-Identifier=v8m5o3ewdoi0aw6qpm83rjbz&X-Plex-Platform=Chrome&X-Plex-Platform-Version=67.0&X-Plex-Sync-Version=2&X-Plex-Device=Windows&X-Plex-Device-Name=Chrome&X-Plex-Device-Screen-Resolution=1920x926%2C1920x1080&X-Plex-Token=szg7mk9HExD9xJQ5Egyj&X-Plex-Language=en - 1 active item(s)
Aug 01, 2018 13:53:23.939 [7724] VERBOSE - [IDLE] * transcoder - 64uwkt5xcy2h4br6382gmtvg - 1 active item(s)
Aug 01, 2018 13:53:26.445 [16632] VERBOSE - JobManager: child process with handle 0x1050 exited
Aug 01, 2018 13:53:26.445 [16632] DEBUG - Jobs: 'K:\Program Files (x86)\Plex\Plex Media Server\PlexTranscoder.exe' exit code for process 6788 is 1 (failure)
Aug 01, 2018 13:53:26.445 [13556] DEBUG - Streaming Resource: Terminating session 0x85e84c8:bece36rjtywipg91o32vg57c which is using transcoder slot. Used slots is now 0
Aug 01, 2018 13:53:26.446 [15876] DEBUG - Killing job.
Aug 01, 2018 13:53:26.446 [13556] DEBUG - Streaming Resource: Terminated session 0x85e84c8:bece36rjtywipg91o32vg57c with reason Conversion failed. The transcoder exited due to an error.
Aug 01, 2018 13:53:26.446 [15876] DEBUG - Job was already killed, not killing again.
Aug 01, 2018 13:53:26.446 [15876] DEBUG - Stopping transcode session 64uwkt5xcy2h4br6382gmtvg
Aug 01, 2018 13:53:26.446 [16632] DEBUG - Cleaning directory for session 64uwkt5xcy2h4br6382gmtvg (K:\PlexTrancodingTemp\Transcode\Sessions\plex-transcode-64uwkt5xcy2h4br6382gmtvg-540b1e06-28c6-42ef-945f-9fb02b7fdd95)
