lifespeed 42 Posted September 25, 2017 Share Posted September 25, 2017 Rather than look at a new CPU why not consider a NVIDIA Pascal video card? Because hardware-accelerated transcoding is still in beta, and reliability of the media server may be an important consideration. Link to comment Share on other sites More sharing options...
lorac 100 Posted September 25, 2017 Share Posted September 25, 2017 I don't think it's coming out of beta anytime soon but personally I find NVENC works better than QSV. It's a fairly low cost experienment and if it doesn't work you can always resell it for a few dollars less than what you paid. Link to comment Share on other sites More sharing options...
Guest asrequested Posted September 26, 2017 Share Posted September 26, 2017 (edited) Can someone please show an example of, what they're capable of transcoding on a 7.gen i5 or i7 (stock clock freq's, not on LN2 cooled monsters) Personally, my 3770 only manages 2 - 2.5 mbit 720p before occasional stuttering. The CPU usage meter in Win10 says it's 40% - 50% load, but going higher causes stutter, despite the CPU load monitor not hitting 100% (!?). Could it be that the load monitoring is just too slow to catch transcoding peak loads? Any way to show trascoding speed relative to "real-time" (obviously this should never get below factor 1)? FWIW I set the bitrate to 10 Mb/s on 3 devices and played three movies. My server has an i7 6700K with Z170 chipset. Here are the results. With three transcodes. With one transcode When starting the second transcode, the CPU maxes out. But the GPU still has room for more. I suspect that if I used my i7 7700k with the Z270 chipset, the results would be much better. I have that in my HTPC, and when I load it up, it has more headroom. Edited September 26, 2017 by Doofus Link to comment Share on other sites More sharing options...
Luke 37118 Posted September 26, 2017 Share Posted September 26, 2017 Well done ! Link to comment Share on other sites More sharing options...
Guest asrequested Posted September 26, 2017 Share Posted September 26, 2017 @@Luke refresh my memory, please. Is HWA transcoding enabled for recording Live TV? I have three shows recording and HWA is not being used. Link to comment Share on other sites More sharing options...
Luke 37118 Posted September 26, 2017 Share Posted September 26, 2017 Only implemented decoding at this point. Link to comment Share on other sites More sharing options...
Guest asrequested Posted September 26, 2017 Share Posted September 26, 2017 Only implemented decoding at this point. I should have specified that I have 'convert to stream friendly format' enabled, but I believe the answer is the same. Link to comment Share on other sites More sharing options...
Jennice 19 Posted September 26, 2017 Share Posted September 26, 2017 Rather than look at a new CPU why not consider a NVIDIA Pascal video card? I have a GTX 970 video card, but when using it for the transcode, the CPU load graph looks like a fallen pine tree. Many significant spikes at regular intervals (buffer data going back and forth?). I don't get any benefit with my i7-3770. Just stutter which is in sync with the CPU load peaks. Maybe the CPU and/or RAM / data-bus isn't up to the task? The PC is using an SSD drive for Emby. Right now, I 'm testing Emby on my game pc, trying to figure out what kind of PC I would need for Emby transcoding a few 1080p streams real-time... plus some future-proofing. My movies are on a NAS, along with my old CD music, so the Emby PC would need the OS + Emby + space for recorded TV. Link to comment Share on other sites More sharing options...
Jennice 19 Posted September 26, 2017 Share Posted September 26, 2017 FWIW I set the bitrate to 10 Mb/s on 3 devices and played three movies. My server has an i7 6700K with Z170 chipset. Here are the results. ... When starting the second transcode, the CPU maxes out. But the GPU still has room for more. I suspect that if I used my i7 7700k with the Z270 chipset, the results would be much better. I have that in my HTPC, and when I load it up, it has more headroom. When the CPU max'es out, does that cause the playback/transcode to stutter, or does it "just" mean that the transcode isn't running as fast as its ffmpeg routine permits? Link to comment Share on other sites More sharing options...
pappaq 8 Posted September 26, 2017 Share Posted September 26, 2017 FWIW I set the bitrate to 10 Mb/s on 3 devices and played three movies. My server has an i7 6700K with Z170 chipset. Here are the results. ... When starting the second transcode, the CPU maxes out. But the GPU still has room for more. I suspect that if I used my i7 7700k with the Z270 chipset, the results would be much better. I have that in my HTPC, and when I load it up, it has more headroom. I tried it with 3 transcoding movies on my i3 3225 with HWT and I get around 64% CPU usage. Link to comment Share on other sites More sharing options...
maegibbons 1267 Posted September 26, 2017 Share Posted September 26, 2017 FWIW I set the bitrate to 10 Mb/s on 3 devices and played three movies. My server has an i7 6700K with Z170 chipset. Here are the results. With three transcodes. With one transcode When starting the second transcode, the CPU maxes out. But the GPU still has room for more. I suspect that if I used my i7 7700k with the Z270 chipset, the results would be much better. I have that in my HTPC, and when I load it up, it has more headroom. Any chance you can show us the ffmpeg-transcode logs when you ran the three transcode test? Many Thanks Krs Mark Link to comment Share on other sites More sharing options...
maegibbons 1267 Posted September 26, 2017 Share Posted September 26, 2017 Only implemented decoding at this point. @@Luke Are we close to this being implemented on the roadmap? Would love to try hardware encoding on record-transcode! Is there a particular issue that makes it difficult? Krs Mark Link to comment Share on other sites More sharing options...
Jennice 19 Posted September 26, 2017 Share Posted September 26, 2017 (edited) I tried it with 3 transcoding movies on my i3 3225 with HWT and I get around 64% CPU usage. WOW! What a difference !? strange... compated to the i7-6700k setup mentioned above. Edited September 26, 2017 by Jennice Link to comment Share on other sites More sharing options...
pappaq 8 Posted September 26, 2017 Share Posted September 26, 2017 WOW! What a difference !? strange... compated to the i7-6700k setup mentioned above. Yeah, and I think 4 streams shouldn't be an issue. And no stuttering whatsoever. My only problem could be my upload then. Link to comment Share on other sites More sharing options...
Jennice 19 Posted September 26, 2017 Share Posted September 26, 2017 With the 3225... Does it use an nVidia graphiocs card or the iGPU for transcoding? Link to comment Share on other sites More sharing options...
pappaq 8 Posted September 26, 2017 Share Posted September 26, 2017 With the 3225... Does it use an nVidia graphiocs card or the iGPU for transcoding? iGPU Link to comment Share on other sites More sharing options...
Jennice 19 Posted September 26, 2017 Share Posted September 26, 2017 Impressive. Which OS? Win10 or...? Link to comment Share on other sites More sharing options...
pappaq 8 Posted September 26, 2017 Share Posted September 26, 2017 Impressive. Which OS? Win10 or...? Windows 8.1 Link to comment Share on other sites More sharing options...
Jennice 19 Posted September 26, 2017 Share Posted September 26, 2017 maegibbons: Are you running Win10, and do you have any anti-virus or similar running (your tray area around the date/clock looks like hiding details. Link to comment Share on other sites More sharing options...
maegibbons 1267 Posted September 26, 2017 Share Posted September 26, 2017 maegibbons: Are you running Win10, and do you have any anti-virus or similar running (your tray area around the date/clock looks like hiding details. I was quoting @ 's post. I was also suprised by cpu usage which is why i was asking for the ffmpeg logs. You need to ask him about AV as his machine. Krs mark Link to comment Share on other sites More sharing options...
Guest asrequested Posted September 26, 2017 Share Posted September 26, 2017 (edited) It's going to depend on what you're transcoding. I chose three big files that have Dolby Atmos. And at 10 Mb/s it's a lot of work. I should re-run the test and change the bitrate to 2 Mb/s. It's a lot less data to write. There should be a notable difference. I can post the transcode logs, later tonight. Edited September 26, 2017 by Doofus Link to comment Share on other sites More sharing options...
Guest asrequested Posted September 26, 2017 Share Posted September 26, 2017 When the CPU max'es out, does that cause the playback/transcode to stutter, or does it "just" mean that the transcode isn't running as fast as its ffmpeg routine permits? Playback was smooth. And I'm using the Emby Ffmpeg build. I have throttling enabled, Using HWA means that Ffmpeg isn't doing the transcoding, only directing the stream to the GPU with the chosen parameters. Link to comment Share on other sites More sharing options...
jhoff80 87 Posted September 26, 2017 Share Posted September 26, 2017 Anyone know if there are NVENC limitations when on Server 2016? I got a 1050Ti to attempt to test out hardware transcoding of 4k HEVC 10bit (which the 1050Ti is supposed to have full hardware decode for), and only get about 18fps (even when just playing locally on the server with MPC-HC. I don't know if it has to do with the fact that I had to use Windows 10 drivers instead of specific Server ones, or that extra roles and features need to be included, or if it's just a limitation of the card itself... but I haven't had any luck. Link to comment Share on other sites More sharing options...
Gerrit507 24 Posted September 26, 2017 Share Posted September 26, 2017 (edited) Anyone know if there are NVENC limitations when on Server 2016? I got a 1050Ti to attempt to test out hardware transcoding of 4k HEVC 10bit (which the 1050Ti is supposed to have full hardware decode for), and only get about 18fps (even when just playing locally on the server with MPC-HC. I don't know if it has to do with the fact that I had to use Windows 10 drivers instead of specific Server ones, or that extra roles and features need to be included, or if it's just a limitation of the card itself... but I haven't had any luck. I have a 1050Ti too. My card handles two 4K hevc 10 bit streams at the same time with ease. Although I've found out that NVDEC is unable to handle HDR streams with interlaced 4:2.0 chroma subsampling a.k.a 4:2:0 Type 2. It produces atrifacts and choppy output. So I guess your issue is either caused by the input file or is some driver issue. By the way: Which hw-acceleration do you have selected in MPC? Emby uses NVDEC/NVENC and I think standard for MPC is DXVA. Edited September 26, 2017 by Gerrit507 Link to comment Share on other sites More sharing options...
Jennice 19 Posted September 26, 2017 Share Posted September 26, 2017 Here's the CPU usage on my 3770k, transcoding 1 stream 1080p (live TV). I can't go beyond 2 mbps, or I get stutter. QuickSync disabled. Link to comment Share on other sites More sharing options...
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