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10th July 2009, 07:54 | #1 | Link |
Hardware Aspirin
Join Date: Jul 2007
Posts: 461
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CUDA H.264 vs x264 Speed and Image Quality Benchmarks, discussion
Hardware
Software
Source Videos VforVendetta 2000Kbps 1280x720 Clip Mediainfo on Source Code:
Video ID : 2 Format : AVC Format/Info : Advanced Video Codec Format profile : High@L4.0 Format settings, CABAC : Yes Format settings, ReFrames : 4 frames Muxing mode : Container profile=Unknown@4.0 Codec ID : V_MPEG4/ISO/AVC Duration : 1mn 52s Nominal bit rate : 2 000 Kbps Width : 1 280 pixels Height : 720 pixels Display aspect ratio : 2.35 Frame rate : 23.976 fps Resolution : 24 bits Colorimetry : 4:2:0 Scan type : Progressive Bits/(Pixel*Frame) : 0.091 Writing library : x264 core 65 r999+1 eb3ef1b Encoding settings : cabac=1 / ref=4 / deblock=1:-1:-1 / analyse=0x3:0x113 / me=tesa / subme=9 / psy_rd=1.0:0.0 / mixed_ref=1 / me_range=32 / chroma_me=1 /trellis=0 / 8x8dct=1 / cqm=0 / deadzone=4,4 / chroma_qp_offset=-2 / threads=3 / nr=0 / decimate=0 / mbaff=0 / bframes=3 / b_pyramid=1 / b_adapt=2 / b_bias=0 / direct=3 / wpredb=1 / keyint=250 / keyint_min=25 / scenecut=40(pre) / rc=2pass / bitrate=2000 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / pb_ratio=1.30 / aq=1:1.00 Encoding Settings CUDA GPU MeGUI x264 Preset ultrafast used hereCode:
program --bitrate 800 --no-mixed-refs --bframes 1 --no-weightb --direct temporal --nf --no-cabac --subme 1 --partitions none --scenecut 0 --me dia --threads auto --thread-input --aq-mode 0 --output "output" "input" --subme 0 --preset ultrafast Speed Results
Image comparison Source x264 @ 800 Kbps CUDA GPU @ 800 Kbps Output File Mediainfo x264 @ 800 Kbps Code:
Video ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : Main@L3.1 Format settings, CABAC : No Format settings, ReFrames : 2 frames Codec ID : avc1 Codec ID/Info : Advanced Video Coding Duration : 1mn 52s Bit rate mode : Variable Bit rate : 900 Kbps Nominal bit rate : 800 Kbps Maximum bit rate : 2 229 Kbps Width : 1 280 pixels Height : 720 pixels Display aspect ratio : 16/9 Frame rate mode : Constant Frame rate : 23.976 fps Resolution : 24 bits Colorimetry : 4:2:0 Scan type : Progressive Bits/(Pixel*Frame) : 0.041 Stream size : 12.1 MiB (100%) Writing library : x264 core 68 r1179M 96e2229 Encoding settings : cabac=0 / ref=1 / deblock=0:0:0 / analyse=0:0 / me=dia / subme=0 / psy_rd=0.0:0.0 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=0 / cqm=0 / deadzone=21,11 / chroma_qp_offset=0 / threads=6 / nr=0 / decimate=1 / mbaff=0 / bframes=1 / b_pyramid=0 / b_adapt=1 / b_bias=0 / direct=1 / wpredb=0 / keyint=250 / keyint_min=25 / scenecut=0 / rc=abr / bitrate=800 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / ip_ratio=1.40 / pb_ratio=1.30 / aq=0 CUDA GPU @ 800 Kbps Code:
Video ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : High@L5.1 Format settings, CABAC : Yes Format settings, ReFrames : 2 frames Codec ID : avc1 Codec ID/Info : Advanced Video Coding Duration : 1mn 52s Bit rate mode : Variable Bit rate : 869 Kbps Maximum bit rate : 1 776 Kbps Width : 1 280 pixels Height : 720 pixels Display aspect ratio : 16/9 Frame rate mode : Constant Frame rate : 23.976 fps Resolution : 24 bits Colorimetry : 4:2:0 Scan type : Progressive Bits/(Pixel*Frame) : 0.039 Stream size : 11.6 MiB (100%) Shows that GPU temperature rose by 6 C when encoding. CPU Usage was almost 95% on all 4 cores during the encode. More soon... Suggest settings and comparisons you would like to see. EDIT: Thank you for you suggestion guys. As I said in my OP, that there is more to come with different sources at different resolutions. I'm not trying to advertise anyone here. Just feeding my curiosity to see what kind of encoding does the free CUDA encoder do and probably helping others feeling the same way in the process. The settings in this encode were used to test the pure speed of x264, to see if it could be as fast as GPU encode at similar or better quality. Since that didn't happen, I will try to match the quality and see what is the difference in performance. As to the hardware used, this is the best thing I have access to right now. Also as others said GTS 250 is a last generation GPU based on the G92 chip used in 8800GTS 512 MB, 9800GTX, 9800 GTX+. Also I may use Badaboom and MediaShow Espresso in future if time permits. Also I plan on using this video 1080p VBR Video Quality Test Streams Sony HDW-F900 footage, 1080p@25, 18 Mbps average, 30 Mbps peak in a 35 Mbps Transport Stream (259,534,064 bytes) on this page http://www.w6rz.net/ as one of the sources. Please let me know if there is another uncompressed source you would like me to try. I'm not too sure about the questions regarding the decoder, I only have ffdshow+haali media splitter installed on my system. I would really appreciate if you let me know If i need to change something with the decoders.
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Stream video on web in your quality Last edited by St Devious; 10th July 2009 at 15:03. |
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