[Live-devel] Packet Loss Problem

[fung ka luen]

Dear All,
 
Thank you very much for your quick response!
 
>First, you should make sure that your network has sufficient >bandwidth for your data stream.
 
I used the “iperf” to check the Bandwidth between the PCs which have 3.8 Mbits/sec >However, packet loss can be caused by insufficiently large socket >reception buffers in the receiver's OS. See ><http://lists.live555.com/pipermail/live-devel/2007-May/006798.html> >for a tip on how you may be able to overcome this.
 
According to your tips, I have tried to increase the size to 2,000,000. One more question, is it same as to use “-B 2000000”? Anyway, the packet losses are still (lost 10%) happened.
 
I have a funny finding. I had tried to change the PC to be a server or client. 
 
Case 1: 
P4 1.5G (server)  >  IBM T40 & Acer dual-core (Client ) = 10% lost
Case 2: 
IBM T40 (server)  > P4 1.5G & Acer dual-core (Client ) = <1% lost
Case 3: 
Acer dual-core (server) > IBM T40 & P4 1.5G (Client) = 10% lost
 
** Other hardware setup and connection are the same.
 
One the other hand, the packet loss only happened in the “Video” part only , The Audio have no loss. 
 
begin_QOS_statistics
server_availability     100
stream_availability     100
subsession      video/MPV
num_packets_received    36952
num_packets_lost        3718
elapsed_measurement_time        359.000749
kBytes_received_total   46816.360000
measurement_sampling_interval_ms        1000
kbits_per_second_min    843.226941
kbits_per_second_ave    1043.259328
kbits_per_second_max    1214.184499
packet_loss_percentage_min      0.000000
packet_loss_percentage_ave      9.141874
packet_loss_percentage_max      23.636364
inter_packet_gap_ms_min 0.041000
inter_packet_gap_ms_ave 9.715226
inter_packet_gap_ms_max 134.576000
subsession      audio/MPA
num_packets_received    13737
num_packets_lost        0
elapsed_measurement_time        359.000749
kBytes_received_total   10102.583000
measurement_sampling_interval_ms        1000
kbits_per_second_min    182.313991
kbits_per_second_ave    225.126728
kbits_per_second_max    252.993771
packet_loss_percentage_min      0.000000
packet_loss_percentage_ave      0.000000
packet_loss_percentage_max      0.000000
inter_packet_gap_ms_min 0.871000
inter_packet_gap_ms_ave 26.122219
inter_packet_gap_ms_max 260.199000
end_QOS_statistics
 
 
Can I did something to solve the packet loss problem?
 
Thank you very much!
 
KL Fung
 
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