[vlc] VLC and wireless multicast

[Petrus]

Hi, I'm successfully using VLC to stream Mpeg2 TS contents to several other VLC
in my  Fast Ethernet LAN with rtp multicast. I'have a wireless lan too,
connected to the first. Unicasting to a wirelss client works fine and smooth
even at 3Mbps (very few errors).
But I get lots of errors and picture corruptions when multicasting to those
wireless client even at very low bitrates (at 256kbps too!).
VLCs are all 0.7.1 version, the server is on linux, clients on windows XP


The wireless setup is: Access Point Cisco Aironet 350 (802.11 B) with 12.01T
firmware.
Clients: Cisco Aironet 350 PCMCIA cards 

Any suggestion?
Thanks in advance 
Petrus

An excerpt of the errors VLC client reports when receiving multicast:

main warning: backward_pts != current_pts (-448940)
mpeg_audio debug: emulated startcode (no startcode on following frame)
mpgatofixed32 warning: libmad error: bad main_data_begin pointer
main debug: stream periodicity changed from P[5] to P[35]
mpeg_system warning: packet lost by TS demux for PID 69: current 5, packet 11
mpeg_system warning: packet lost by TS demux for PID 68: current 7, packet 10
mpeg_system warning: packet corrupted, PES sizes do not match
mpeg_system warning: packet corrupted, PES sizes do not match
mpeg_system warning: packet lost by TS demux for PID 69: current 8, packet 15
mpeg_system warning: packet lost by TS demux for PID 68: current 8, packet 10
mpeg_system warning: Oversized PES packet for PID 69: expected 2346, actual 2384
mpeg_system warning: packet corrupted, PES sizes do not match
mpeg_audio debug: emulated startcode (no startcode on following frame)
mpgatofixed32 warning: libmad error: bad main_data_begin pointer
main warning: buffer is 47233 in advance, triggering downsampling
main warning: timing screwed, stopping resampling
main warning: buffer is 70013 in advance, triggering downsampling
mpeg_audio debug: emulated startcode (no startcode on following frame)
main warning: timing screwed, stopping resampling
main warning: buffer is 114685 in advance, triggering downsampling
main warning: late picture skipped (3768686407)
main debug: stream periodicity changed from P[35] to P[34]
main debug: decoded 101/107 pictures
main warning: backward_pts != current_pts (-39900)
main warning: late picture skipped (3768726023)
mpeg_system warning: packet lost by TS demux for PID 69: current 3, packet 9
mpeg_system warning: packet corrupted, PES sizes do not match
mpeg_system warning: packet lost by TS demux for PID 68: current 15, packet 2
mpeg_system warning: packet corrupted, PES sizes do not match
mpeg_audio debug: emulated startcode (no startcode on following frame)
mpeg_audio debug: emulated startcode
mpgatofixed32 warning: libmad error: bad main_data_begin pointer
main warning: timing screwed, stopping resampling
main warning: buffer is 172173 in advance, triggering downsampling
main warning: backward_pts != current_pts (-16611)
main warning: late picture skipped (3769537199)
main debug: stream periodicity changed from P[34] to P[35]
mpeg_system warning: packet lost by TS demux for PID 69: current 8, packet 15
mpeg_system warning: packet lost by TS demux for PID 68: current 4, packet 6
mpeg_system warning: packet corrupted, PES sizes do not match
main warning: backward_pts != current_pts (-15911)
main warning: late picture skipped (3770763939)

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