[vlc-devel] VLC's performance on SMP system

[xxcv]

    Hello,

Regarding the VLC media player's playback ability on Windows SMP system.
Information displayed by MediaInfo:
Video
/ID :/ 	2
/Format :/ 	AVC
/Format/Info :/ 	Advanced Video Codec
/Format profile :/ 	High at L4.1
/Format settings, CABAC :/ 	Yes
/Format settings, ReFrames :/ 	4 frames
/Codec ID :/ 	avc1
/Codec ID/Info :/ 	Advanced Video Coding
/Duration :/ 	9mn 35s
/Bit rate mode :/ 	Variable
/Bit rate :/ 	9 213 Kbps
/Maximum bit rate :/ 	20.6 Mbps
/Width :/ 	1 280 pixels
/Height :/ 	720 pixels
/Display aspect ratio :/ 	16/9
/Frame rate mode :/ 	Constant
/Frame rate :/ 	59.940 fps
/Resolution :/ 	24 bits
/Colorimetry :/ 	4:2:0
/Scan type :/ 	Progressive
/Bits/(Pixel*Frame) :/ 	0.167
/Stream size :/ 	632 MiB (97%)
/Writing library :/ 	x264 core 65 r1057M 5f8a149
/Encoding settings :/ 	cabac=1 / ref=4 / deblock=1:-1:-1 / 
analyse=0x3:0x113 / me=umh / subme=7 / psy_rd=1.0:0.0 / mixed_ref=1 / 
me_range=16 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / 
deadzone=21,11 / chroma_qp_offset=-2 / threads=3 / nr=0 / decimate=1 / 
mbaff=0 / bframes=3 / b_pyramid=0 / b_adapt=2 / b_bias=0 / direct=3 / 
wpredb=1 / keyint=250 / keyint_min=25 / scenecut=40(pre) / rc=crf / 
crf=22.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / 
vbv_maxrate=50000 / vbv_bufsize=50000 / ip_ratio=1.40 / pb_ratio=1.30 / 
aq=1:1.00
/Encoded date :/ 	UTC 2009-05-24 10:15:50
/Tagged date :/ 	UTC 2009-05-24 10:15:58


Audio
/ID :/ 	1
/Format :/ 	AAC
/Format/Info :/ 	Advanced Audio Codec
/Format version :/ 	Version 4
/Format profile :/ 	LC
/Format settings, SBR :/ 	No
/Codec ID :/ 	40
/Duration :/ 	9mn 34s
/Bit rate mode :/ 	Variable
/Bit rate :/ 	253 Kbps
/Maximum bit rate :/ 	260 Kbps
/Channel(s) :/ 	2 channels
/Channel positions :/ 	L R
/Sampling rate :/ 	48.0 KHz
/Resolution :/ 	16 bits
/Stream size :/ 	17.3 MiB (3%)
/Encoded date :/ 	UTC 2009-05-24 10:15:50
/Tagged date :/ 	UTC 2009-05-24 10:15:58

VLC-1.0.0-RC2 failed playback of such file smoothly, video freezes 
throughout the entire clip
although it workaround temporarily by setting "skip the loop filter for 
H.264 decoding" to "Non-ref"
then video stuttering effects are reduced.
However, this isn't the case in "Windows Media Player 11.0" using 
ffdshow <http://sourceforge.net/projects/ffdshow-tryout> where the 
playback is
smooth and is in synchronization.
Video stuttering effects occurs when processor resources are still 
available.
cf. attached is an image, during the same interval of 1 minute 
processor* usage graph.
* AMD Athlon^(TM) X2 Dual-Core

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