mikedefieslife Posted November 13, 2016 Share Posted November 13, 2016 Hi, I'm running a half height Dell R7 250. I've managed to get this to work in MacOS Sierra by booting via Clover injecting ATI with a device ID of 0x683f. Perfomance seem fine at the desktop level windows are snappy, launch pad is fine etc.. I can happily play 1080p videos, and watch Youtube videos. However, some part of the graphics acceleration must not be working correctly as I can't play 4k 100Mbps video. It's madly choppy. The graphics card should easily be capable, but it seems a no go at the moment. How do I test graphics performance, and make sure that acceleration is working properly? Are there some OpenGL and OpenCL tests? In FCPX I get a BruceX time of 122 seconds in proress422 (8gb, Pentium G3240), which is about 15 seconds faster than my 2015 13" I5 Macbook Pro. Link to comment Share on other sites More sharing options...
mitch_de Posted November 14, 2016 Share Posted November 14, 2016 You first should check what Codec us used in that video (h264 or h265). Some 4k Video, for download, use h254 some h265(HEVC), which is much more complex in decoding for CPU and GPU (it it help to decode !). So it may not be an problem of the GPU itself, it can be that the drivers (in Mac) disnt help as much to decode h265 (or h264) as in windows. Also the used player may be the problem, beside the drivers. To make it easier to compare und narrow down the probs , it is usefull that other can compare your results (low fps, choppy video) with their hardware. Link to 4 K Demo Video (h265, 1 Min, 450 MB) : http://downloads.4ksamples.com/downloads/sample-Elysium.2013.2160p.mkv File Information Format : Matroska Format version : Version 4 / Version 2 Duration : 1h 49mn Overall bit rate : 60.5 Mbps Movie name : Elysium 2013 Encoded date : UTC 2016-01-05 22:49:13 Writing application : mkvmerge v8.7.0 (‘All of the above’) 64bit Writing library : libebml v1.3.3 + libmatroska v1.4.4 Video ID : 1 Format : HEVC Format/Info : High Efficiency Video Coding Codec ID : V_MPEGH/ISO/HEVC Bit rate : 57.7 Mbps Width : 3 840 pixels Height : 1 608 pixels Display aspect ratio : 2.40:1 Frame rate mode : Constant Frame rate : 23.976 (24000/1001) fps Language : English Default : Yes Forced : No Audio ID : 2 Format : DTS Format/Info : Digital Theater Systems Format profile : MA / Core Mode : 16 Format settings, Endianness : Big Codec ID : A_DTS Bit rate mode : Variable / Constant Bit rate : 2 775 Kbps / 1 509 Kbps Channel(s) : 8 channels / 6 channels Channel positions : Front: L C R, Side: L R, Back: L R, LFE / Front: L C R, Side: L R, LFE Sampling rate : 48.0 KHz Frame rate : 93.750 fps (512 spf) Bit depth : 16 bits Compression mode : Lossless / Lossy Delay relative to video : 5ms Stream size : 2.12 GiB (5%) Title : DTS-HD MA 7.1 – Blu-ray CEE Language : English Default : Yes Forced : No On my Nvidia GT 740 that video is unplayable choppy. Link to comment Share on other sites More sharing options...
mikedefieslife Posted November 14, 2016 Author Share Posted November 14, 2016 It's recorded with a sony RX100 IV in xavc. I can play it buttery smooth on my mac pro with internal Intel Iris. I also noted that certain online flash videos are choppy and seem to freeze up the computer for a few seconds at a time. So I think it defiantly something to do with acceleration. The video that you linked to is a bit choppy on both systems. No where near as bad as the stuff I'm trying to play though. Link to comment Share on other sites More sharing options...
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