Plex in Docker Container: Hardware Transcoding works with Nvidia P2000, but why is conversion for offline sync so slow?

Server Version#: 1.16.4.1469
Player Version#: iOS 6.0 (beta build 17974)

I installed a Nvidia P2000 and got hardware transcoding to work with my docker container running plex

I tried doing a sync today for some movies for my kids on their iPads and noticed the “conversion” step was wasn’t faster like I expected. In fact it seems like it’s slower.

Is a GPU that’s used for hardware transcoding not used for offline sync conversions?

Here’s a snippet from my Plex logs when it was in the conversion step during an offline sync of a movie. The conversion step was reported in Plex dashboard as going at 2-3x.

Aug 12, 2019 19:58:00.407 [0x14bca73f9700] DEBUG - Request: [127.0.0.1:41952 (Loopback)] PUT /video/:/transcode/session/D1317A00-96F1-4B85-9A3F-358882F88E08/e663516a-af04-46d8-bf2c-46041ccd4ef9/progress?progress=17.9&size=-22&remaining=54704&vdec_packets=14917&vdec_hw_ok=14907&vdec_hw_status=1 (18 live) Signed-in Token (MYUSERNAME) Aug 12, 2019 19:58:00.407 [0x14bcd59cc700] DEBUG - Completed: [127.0.0.1:41952] 206 PUT /video/:/transcode/session/D1317A00-96F1-4B85-9A3F-358882F88E08/e663516a-af04-46d8-bf2c-46041ccd4ef9/progress?progress=17.9&size=-22&remaining=54704&vdec_packets=14917&vdec_hw_ok=14907&vdec_hw_status=1 (18 live) 0ms 371 bytes (pipelined: 217) (range: bytes=0-) Aug 12, 2019 19:58:00.676 [0x14bcd59cc700] DEBUG - Auth: authenticated user 1 as MYUSERNAME Aug 12, 2019 19:58:00.676 [0x14bca5fef700] DEBUG - Request: [192.168.1.160:60956 (Subnet)] GET /sync/transcodeQueue (18 live) TLS GZIP Signed-in Token (MYUSERNAME) Aug 12, 2019 19:58:00.677 [0x14bcd59cc700] DEBUG - Completed: [192.168.1.160:60956] 200 GET /sync/transcodeQueue (18 live) TLS GZIP 0ms 687 bytes (pipelined: 21) Aug 12, 2019 19:58:00.909 [0x14bca4de6700] DEBUG - Request: [127.0.0.1:41952 (Loopback)] PUT /video/:/transcode/session/D1317A00-96F1-4B85-9A3F-358882F88E08/e663516a-af04-46d8-bf2c-46041ccd4ef9/progress?progress=17.9&size=-22&remaining=54704&vdec_packets=14917&vdec_hw_ok=14907&vdec_hw_status=1 (18 live) Signed-in Token (MYUSERNAME) Aug 12, 2019 19:58:00.910 [0x14bcd5bcd700] DEBUG - Completed: [127.0.0.1:41952] 206 PUT /video/:/transcode/session/D1317A00-96F1-4B85-9A3F-358882F88E08/e663516a-af04-46d8-bf2c-46041ccd4ef9/progress?progress=17.9&size=-22&remaining=54704&vdec_packets=14917&vdec_hw_ok=14907&vdec_hw_status=1 (18 live) 0ms 371 bytes (pipelined: 218) (range: bytes=0-) Aug 12, 2019 19:58:01.425 [0x14bca63f1700] DEBUG - Request: [127.0.0.1:41952 (Loopback)] PUT /video/:/transcode/session/D1317A00-96F1-4B85-9A3F-358882F88E08/e663516a-af04-46d8-bf2c-46041ccd4ef9/progress?progress=17.9&size=-22&remaining=54679&vdec_packets=14920&vdec_hw_ok=14910&vdec_hw_status=1 (16 live) Signed-in Token (MYUSERNAME) Aug 12, 2019 19:58:01.426 [0x14bcd5bcd700] DEBUG - Completed: [127.0.0.1:41952] 206 PUT /video/:/transcode/session/D1317A00-96F1-4B85-9A3F-358882F88E08/e663516a-af04-46d8-bf2c-46041ccd4ef9/progress?progress=17.9&size=-22&remaining=54679&vdec_packets=14920&vdec_hw_ok=14910&vdec_hw_status=1 (16 live) 0ms 371 bytes (pipelined: 219) (range: bytes=0-) Aug 12, 2019 19:58:01.928 [0x14bca5fef700] DEBUG - Request: [127.0.0.1:41952 (Loopback)] PUT /video/:/transcode/session/D1317A00-96F1-4B85-9A3F-358882F88E08/e663516a-af04-46d8-bf2c-46041ccd4ef9/progress?progress=17.9&size=-22&remaining=54683&vdec_packets=14920&vdec_hw_ok=14910&vdec_hw_status=1 (16 live) Signed-in Token (MYUSERNAME) Aug 12, 2019 19:58:01.928 [0x14bcd59cc700] DEBUG - Completed: [127.0.0.1:41952] 206 PUT /video/:/transcode/session/D1317A00-96F1-4B85-9A3F-358882F88E08/e663516a-af04-46d8-bf2c-46041ccd4ef9/progress?progress=17.9&size=-22&remaining=54683&vdec_packets=14920&vdec_hw_ok=14910&vdec_hw_status=1 (16 live) 0ms 371 bytes (pipelined: 220) (range: bytes=0-) Aug 12, 2019 19:58:02.442 [0x14bca53e9700] DEBUG - Request: [127.0.0.1:41952 (Loopback)] PUT /video/:/transcode/session/D1317A00-96F1-4B85-9A3F-358882F88E08/e663516a-af04-46d8-bf2c-46041ccd4ef9/progress?progress=17.9&size=-22&remaining=54609&vdec_packets=14922&vdec_hw_ok=14912&vdec_hw_status=1 (16 live) Signed-in Token (MYUSERNAME) Aug 12, 2019 19:58:02.443 [0x14bcd59cc700] DEBUG - Completed: [127.0.0.1:41952] 206 PUT /video/:/transcode/session/D1317A00-96F1-4B85-9A3F-358882F88E08/e663516a-af04-46d8-bf2c-46041ccd4ef9/progress?progress=17.9&size=-22&remaining=54609&vdec_packets=14922&vdec_hw_ok=14912&vdec_hw_status=1 (16 live) 0ms 371 bytes (pipelined: 221) (range: bytes=0-) Aug 12, 2019 19:58:02.456 [0x14bcd59cc700] DEBUG - Completed: [192.168.1.48:53127] -2 GET /player/proxy/poll?deviceClass=pc&protocolVersion=3&protocolCapabilities=timeline%2Cplayback%2Cnavigation%2Cmirror%2Cplayqueues&timeout=1 (16 live) TLS GZIP 20000ms 5 bytes (pipelined: 16) Aug 12, 2019 19:58:02.460 [0x14bcd5bcd700] DEBUG - Auth: authenticated user 1 as MYUSERNAME Aug 12, 2019 19:58:02.460 [0x14bca4de6700] DEBUG - Request: [192.168.1.48:53127 (Subnet)] GET /player/proxy/poll?deviceClass=pc&protocolVersion=3&protocolCapabilities=timeline%2Cplayback%2Cnavigation%2Cmirror%2Cplayqueues&timeout=1 (16 live) TLS GZIP Signed-in Token (MYUSERNAME) Aug 12, 2019 19:58:02.945 [0x14bca5fef700] DEBUG - Request: [127.0.0.1:41952 (Loopback)] PUT /video/:/transcode/session/D1317A00-96F1-4B85-9A3F-358882F88E08/e663516a-af04-46d8-bf2c-46041ccd4ef9/progress?progress=17.9&size=-22&remaining=54595&vdec_packets=14922&vdec_hw_ok=14912&vdec_hw_status=1 (16 live) Signed-in Token (MYUSERNAME) Aug 12, 2019 19:58:02.945 [0x14bcd5bcd700] DEBUG - Completed: [127.0.0.1:41952] 206 PUT /video/:/transcode/session/D1317A00-96F1-4B85-9A3F-358882F88E08/e663516a-af04-46d8-bf2c-46041ccd4ef9/progress?progress=17.9&size=-22&remaining=54595&vdec_packets=14922&vdec_hw_ok=14912&vdec_hw_status=1 (16 live) 0ms 371 bytes (pipelined: 222) (range: bytes=0-)

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