dcol 165 Posted March 27, 2022 Share Posted March 27, 2022 Hi, I looked at many topics on transcoding and couldn't come up with any solutions. I have an Nvidia RX4000 and Intel UHD 750 (CPU i9-9900k) in the Emby server. Right now I primarily use the RX4000 as my primary transcoder with 3 people max transcoding at the same time. Works well. My issue is I need to pull the RX4000 because I need the PCI slot for a second raid card but do not want to sacrifice any transcoding abilities. Question is, will I be ok just using the Intel GPU or will performance suffer? Some of the viewed content is 4K 10 bit. Most is 1080p. Any help or suggestions is appreciated. Thanks Link to comment Share on other sites More sharing options...
Happy2Play 8273 Posted March 27, 2022 Share Posted March 27, 2022 Shouldn't be an issue but all you can really do is test. This should probably be in Hardware section, moving to that category. Link to comment Share on other sites More sharing options...
dcol 165 Posted March 27, 2022 Author Share Posted March 27, 2022 (edited) Guess the best thing to do is just turn off Nvidia transcoding and see if anyone has an issue. I would like some feedback on others using Intel UHD transcoding. How many streams can it handle and what thread count should I use sort of thing. This is a dedicated Media server only streaming with Emby and Channels. Edited March 27, 2022 by dcol Link to comment Share on other sites More sharing options...
lorac 100 Posted March 27, 2022 Share Posted March 27, 2022 I personally find Intel works better for transcoding than NVIDIA. I have a UHD 630 which works well. Link to comment Share on other sites More sharing options...
Happy2Play 8273 Posted March 27, 2022 Share Posted March 27, 2022 Have you seen this. Link to comment Share on other sites More sharing options...
dcol 165 Posted March 28, 2022 Author Share Posted March 28, 2022 That was very helpful, Thanks. What about the thread count setting? With 16 threads, I figure 8 for transcoding. Is that reasonable? Or should it be set to the max users +1. Link to comment Share on other sites More sharing options...
rbjtech 4254 Posted March 28, 2022 Share Posted March 28, 2022 19 hours ago, dcol said: That was very helpful, Thanks. What about the thread count setting? With 16 threads, I figure 8 for transcoding. Is that reasonable? Or should it be set to the max users +1. I just left mine at Max (20 in my case) - as ffmpeg always runs at low CPU priority anyway, so transcoding even when using all threads, should never bottleneck other operations. The UHD630 is a very capable GPU for transcoding and assuming you have a decent amount of memory to share - it can use up to 64Gb of it - ie it will never be memory limited. It should manage the 3 x 4K transcodes with ease, even with tone mapping, for 1080p transcodes then it should easily do 10+ depending on the workload of course. Link to comment Share on other sites More sharing options...
dcol 165 Posted March 28, 2022 Author Share Posted March 28, 2022 Thanks, I do have UHD630, but will upgrade soon to UHD770. System has 128GB memory. 64GB is available for Emby. As long as I am not losing any performance, I will eliminate the RX4000 Link to comment Share on other sites More sharing options...
rbjtech 4254 Posted March 29, 2022 Share Posted March 29, 2022 (edited) Even better - on the UHD770 testing I did, I had 10 x 4K Remux > 1080p transcodes going with tonemapping - so I think you'll have no issues at all with the proposed workloads. Edited March 29, 2022 by rbjtech 3 Link to comment Share on other sites More sharing options...
rbjtech 4254 Posted March 29, 2022 Share Posted March 29, 2022 (edited) So I thought I'd do a quick experiment - to try and mirror the site below for 4K > 1080p Transcode for Emby & Intel UHD 770 https://www.elpamsoft.com/?p=Plex-Hardware-Transcoding - Video : 68Mbit/sec HEVC 4K Remux (The Godfather - Just happens to be 68Mbit/sec) > 10Mbit/sec h264 1080p - Clients - Various but all forced to 10Mbit/sec - Emby - 4.6.7.0 - Stable Release - Source was local SATA Disk (JBOD) - Audio - AC3 (so direct play/no transcoding required) - No tonemapping (turned off) - No THROTTLE - ie simultaneous continuous transcodes - SINGLE transcode performance = 180 fps. Results - I got to 7 streams before I ran out of clients - but transcoding fps was getting very close to 25 - so probably very close to the limit anyway. GPU - it hit 100% '3D' on the first stream, so not 100% sure what that graph shows - the key thing is memory. Each 4K stream takes about 1.1 GB - so for the 7 streams, I'm up to 7.5GB of memory, but have plenty to play with. I have 64GB, but max here is 32GB. CPU load is low @ 13% overall. With Throttle turned ON (ie transcoding as required to fill the buffer), then it's possible that another 1 or maybe 2 streams can be utilised but of course if the fps drops below 24 then the buffer is no longer being maintained. This is 7 x 68Mbit/sec streams - so nearly 500 Mbit/sec worth of transcoding ! Certainly not bad for an integrated GPU To note - tone mapping knocks down the single stream performance to 140 fps - so ~ 6 streams with tone mapping. @softworkz - FYI Edited March 29, 2022 by rbjtech 3 Link to comment Share on other sites More sharing options...
rbjtech 4254 Posted March 29, 2022 Share Posted March 29, 2022 Below is a comparison of all the Encoding and Decoding Intel Integrated Graphics capabilities (codecs etc) - https://www.intel.com/content/www/us/en/develop/documentation/media-capabilities-of-intel-hardware/top.html#media-capabilities-supported-by-intel-hardware_encode-overview-11-12 It's nice to see the 11th/12th Gen (UHD 7xx) also support AV1 Decode. Link to comment Share on other sites More sharing options...
dcol 165 Posted March 29, 2022 Author Share Posted March 29, 2022 Wow thanks! Much more info than I hoped for. Only difference is I will be running i9-12900k, so even better. Link to comment Share on other sites More sharing options...
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