что может быть не так?
neko@somewhere ~ $ mplayer http://cs5935.userapi.com/u16637522/audios/115331edf658.mp3
MPlayer SVN-r35244-3.4.4 (C) 2000-2012 MPlayer Team
Playing http://cs5935.userapi.com/u16637522/audios/115331edf658.mp3.
Resolving cs5935.userapi.com for AF_INET6...
Connecting to server cs5935.userapi.com[2a00:bdc0:2:9:2::172f]: 80...
connect error: Software caused connection abort
Resolving cs5935.userapi.com for AF_INET...
Connecting to server cs5935.userapi.com[87.240.180.200]: 80...
Cache size set to 320 KBytes
Cache fill: 0.00% (0 bytes)
Resolving cs5935.userapi.com for AF_INET6...
Cache empty, consider increasing -cache and/or -cache-min. [performance issue]
Connecting to server cs5935.userapi.com[2a00:bdc0:2:9:2::172f]: 80...
Server returns 404: Not Found
nop_streaming_read error : Bad file descriptor
Resolving cs5935.userapi.com for AF_INET6...
Connecting to server cs5935.userapi.com[2a00:bdc0:2:9:2::172f]: 80...
Server returns 404: Not Found
nop_streaming_read error : Bad file descriptor
nop_streaming_read error : Bad file descriptor
nop_streaming_read error : Bad file descriptor
nop_streaming_read error : Bad file descriptor
nop_streaming_read error : Bad file descriptor
nop_streaming_read error : Bad file descriptor
при этом wget по этому URL'у работает хорошо, и mplayer локальный файл играет
upd:
prefer-ipv4 = yes