All things related to multicast

[Alan Crosswell <>]

WG: I've got a report of some problems with VLC playing the NOAA stuff.  Is 
anyone else seeing this behavior?

Bob Bookbinder wrote:
> 	I'm playing the stream on my G4 laptop. It looks like it's using 30% of 
> the CPU and there's 160MB of free memory. The chop appears to be very regular. 
> One second on and one second off (approx). A 2GHz Win2K PC exhibits the same 
> chop. rtpqual output (if I'm reading it right) shows all the packets late??
>         
> Bob 
>
> Defaulting to: rtpqual 233.55.245.254 4000 rtp
> Report from: rgb 233.55.245.254 4000 rtp at Thu Jul 28 10:18:05 2005
> T Pkts Loss  % Late Bytes |  Pkts  Loss  %  Late     kB Sender
>  4 112  26  18  108 149616 |   112   26  18  108     146 198.7.235.71
>  5 284   0   0  284 380592 |   396   26   6  392     517 198.7.235.71
>  6 217   0   0  217 289740 |   613   26   4  609     800 198.7.235.71
>  7 285   0   0  285 380820 |   898   26   2  894    1172 198.7.235.71
>  8 216   0   0  216 289512 |  1114   26   2 1110    1455 198.7.235.71
>  9 282   0   0  282 376752 |  1396   26   1 1392    1823 198.7.235.71
> 10 219   1   0  218 293580 |  1615   27   1 1610    2109 198.7.235.71
> 11 281   0   0  281 375396 |  1896   27   1 1891    2476 198.7.235.71
> 12 220   0   0  220 294936 |  2116   27   1 2111    2764 198.7.235.71
> 13 280   0   0  280 374040 |  2396   27   1 2391    3129 198.7.235.71
> 14 221   0   0  221 296292 |  2617   27   1 2612    3419 198.7.235.71
> 15 279   0   0  279 372684 |  2896   27   0 2891    3783 198.7.235.71
> 16 222   0   0  222 296520 |  3118   27   0 3113    4072 198.7.235.71
> 17 277   0   0  277 369972 |  3395   27   0 3390    4434 198.7.235.71
> 18 224   0   0  224 299232 |  3619   27   0 3614    4726 198.7.235.71
> 19 277   0   0  277 369972 |  3896   27   0 3891    5087 198.7.235.71
> 20 224   0   0  224 299232 |  4120   27   0 4115    5379 198.7.235.71
> 21 279   0   0  279 372684 |  4399   27   0 4394    5743 198.7.235.71
> 22 222   0   0  222 296520 |  4621   27   0 4616    6033 198.7.235.71
> 23 276   0   0  276 368616 |  4897   27   0 4892    6393 198.7.235.71
> 24 225   0   0  225 300588 |  5122   27   0 5117    6686 198.7.235.71
> 25 273   0   0  273 364548 |  5395   27   0 5390    7042 198.7.235.71
> 26 228   0   0  228 304656 |  5623   27   0 5618    7340 198.7.235.71
> 27 273   0   0  273 364548 |  5896   27   0 5891    7696 198.7.235.71
> 28 228   0   0  228 304656 |  6124   27   0 6119    7993 198.7.235.71
> 29 274   0   0  274 365904 |  6398   27   0 6393    8351 198.7.235.71
> 30 227   0   0  227 303300 |  6625   27   0 6620    8647 198.7.235.71
> 31 268   0   0  268 357768 |  6893   27   0 6888    8996 198.7.235.71
> 32 233   0   0  233 311436 |  7126   27   0 7121    9300 198.7.235.71
> 33 270   0   0  270 360480 |  7396   27   0 7391    9652 198.7.235.71
> 34 231   0   0  231 308724 |  7627   27   0 7622    9954 198.7.235.71
> 35 269   0   0  269 360252 |  7896   27   0 7891   10306 198.7.235.71
> 36 232   0   0  232 310080 |  8128   27   0 8123   10609 198.7.235.71

I'd be more worried about the loss numbers going up.  I'm running it here right 
now and am seeing similar rtpqual numbers.  On linux the video looks OK and the 
audio sounds like it might be a little off (as in buffering speeding up/slowing 
down every so slightly which may have to do with jitter).  But I'm not seeing 
any video chop.  Your rtpqual seems to confirm that there's no regular loss 
happening....

I'll cc this to the WG and see if anyone has suggestions.
/a