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26th September 2017, 00:15 | #282 | Link | ||
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What Intel are desperate to do is market an Intel solution for the 4th Gen owners rather than have them explore an AMD solution. Quote:
Last edited by WhatZit; 26th September 2017 at 00:19. |
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27th September 2017, 20:14 | #283 | Link | |
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The only difference is clock speed.
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Win 10 x64 (19042.572) - Core i5-2400 - Radeon RX 470 (20.10.1) HEVC decoding benchmarks H.264 DXVA Benchmarks for all |
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18th February 2018, 02:10 | #284 | Link |
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Hi everyone sorry for the bit of a old bump, but I feel this thread is still relevant today.
Live x264 encoding works right now, but I feel like because of how complex x265, vp9, and av1 will become, hardware encoders will surely take over vs expensive stream pcs in terms of "adequate" quality vs speed. I was pleasantly surprised to hear HEVC Nvenc was actually nearly equal to x264 on medium. Now for my question. I been playing with stream settings on the program OBS, messing with custom x264 commands and such. Now I have been testing out nvenc more. Does anyone know what 2 pass does exactly? Is it valuable for live encoding purposes? For Twitch it doesn't need to be super low latency (usually hits view at 15-20 seconds) setting which I assume those presets are meant for Nvidia Shield and such. I always thought the asic encoders weren't that great at self analysis as they have more strict limitations, so most of the time you wanted to run it without that option, and the second encoder was meant for dual streaming. The only relevant post I could find was this: https://obsproject.com/forum/threads...-3#post-211863 Thanks |
18th February 2018, 21:01 | #285 | Link | |
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I doubt that it's useful for lice encoding, but 'usually hits view at 15-20 seconds' might be enough to use this. |
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18th February 2018, 21:08 | #286 | Link | |
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And that's actually old their H.265 encoder. Their new one should be even better. http://www.compression.ru/video/code...son/hevc_2016/ |
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18th February 2018, 22:34 | #287 | Link |
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Note that the Intel Media Server Studio (MSS) HEVC Encoder is not what you get when you do "QuickSync" Encoding, its a separate and commercial product you have to buy (its one of the features missing from the free Community-edition of Intel Media Server Studio) - and its expensive.
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LAV Filters - open source ffmpeg based media splitter and decoders |
19th February 2018, 01:46 | #288 | Link |
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As codecs have gotten more complex, they've become less suitable for ASIC and GPU acceleration. So many coding options to choose between means latency between main and HW memory becomes a huge slowdown. And CPU's look a lot more like DSP these days with many cores and SIMD functionality like AVX2 and beyond.
Fixed-function encoders need to tape out well before they hit market, and psychovisual tuning of more complex standards takes a long time and makes a huge difference. So no fixed-function solution will be able to approach quality of the software encoders available by the time they are available in products. Broadcast-grade encoders have increasingly moved to CPU and software defined solutions over the last decade. I can see FPGA accelerated potentially being competitive, but we haven't seen any competitive real-world implementations yet. |
20th February 2018, 23:18 | #289 | Link | |
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21st February 2018, 00:55 | #290 | Link | |
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21st February 2018, 10:50 | #291 | Link |
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Last time I try, h264_qsv was better than hevc_qsv and 2x faster.
h264_qsv has more options available ( look-ahead, B-pyramid .... ) I see that with latest drivers b-pyramid and weighted-b frame is in. I will try to do some tests to see the improvements. |
21st February 2018, 10:57 | #292 | Link | |
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The Intel MSS Encoder is basically a software encoder with hardware acceleration, while QuickSync is a full hardware encoder. Full hardware is faster, but as outlined in various posts above, also quite limited in quality.
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LAV Filters - open source ffmpeg based media splitter and decoders |
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5th April 2018, 13:53 | #293 | Link |
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Nvidia 8.1 SDK is out, supports b-frames in h264 and other improvements: https://developer.nvidia.com/nvidia-video-codec-sdk
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17th April 2018, 00:35 | #294 | Link | |
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http://www.advantech.com/products/pc...ngth_pcie_card And there are cheap x264 cards on eBay Has anyone had any luck (reasonable qualtiy output) with this sort of stuff? |
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17th April 2018, 04:10 | #295 | Link | |
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When predictable speed is all that matters, hardware will always be key, but there's a low ceiling for the maximum quality you can get out of an FPGA/ASIC without reducing it to near-CPU speed. Intel MSS is a different beast; it's essentially a good software encoder with lots of knobs to twiddle with a few hardware-accelerated paths, but it gets most of its speed gain by being paired with insanely fast eDRAM on Iris Pro models. Otherwise, it's just SW encoder speed to go with SW encoder quality. Nvidia or AMD could dedicate their GDDR5 to it to crunch a lot harder for the same fps, but they haven't seemed willing to so far; cheap and good enough is good enough. |
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17th April 2018, 04:12 | #296 | Link | |
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18th April 2018, 02:27 | #297 | Link | |
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MediaServerStudioEssentials2018R1.tar.gz |
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18th April 2018, 02:35 | #298 | Link | |
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VEGA-3310 4K HEVC Broadcast Video Encoding/ Decoding / Transcoding Card 35W seems a lot less than nVidia card, still, I haven't tried one. Here's a blurb from the Datasheet. "The technology behind VEGA-3310 can do the same task in under 35W, and VEGA-3310 can also support up to 4Kp120 high frame rate for next generation sports broadcasts and 360 degree VR applications.. This card feature a simple-to-use API and example code for FFmpeg and GStreamer multimedia frameworks to streamline product development and integration into existing applications." |
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19th April 2018, 13:45 | #299 | Link |
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The biggest improvements might be the new amazon hevc CRAP when comparing to their old H264.
Congrats to all the people that are working in HEVC. So many years to finnaly sell something thats worst in every way against previous stuff. Instead of improving... Yeah Yeah You save bandwith at the cost of our eyes. Same quality my ass. Its a macroblock and banding feast in every official BS stream i put my eyes on. Even some UHD blurays suffer.... |
22nd April 2018, 23:47 | #300 | Link | |
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This is using a BluRay rip of media, which is already encoded. So, If I rip say 50 gig, then recode it down to 3 gig, x265 wins every single time hands down. Recoding to x264 at 3 gig size looks terrible in comparison. |
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