[MPlayer-users] Trouble playing UDP multicast stream in mplayer

[Andy Furniss]

Reimar Döffinger wrote:
> On Tue, Dec 02, 2014 at 06:22:55PM +0600, Prabashwara Seneviratne
> wrote:
>> Thanks for the reply @reimar I followed your suggestions and
>> installed the latest svn mplayer and updated my distro (xubuntu
>> 14.04) for good measure. It also worth mentioning that i moved to
>> a faster machine as well (Core 2 Duo 2.8ghz, 2GB DDR2, Nvidia GTS
>> 450)
>
> Hm, too bad that there's no easy way for me to test myself.
>
>> I tried using the ffmpeg://udp:// command instead and it resulted
>> in this
>>
>> bash at Bash-C2D:~/peo$ mplayer ffmpeg://udp://226.11.3.77:6000
>
> Maybe something like
> ffmpeg://udp://226.11.3.77:6000?buffer_size=2000000&fifo_size=100000
>  would be better...
>
>> using the same command that i used before, with a bigger cache
>> (mplayer --cache 8192 udp://226.11.3.77:6000) the playback was
>> slightly better(i.e not as many artifacts), but still not perfect
>> (perhaps due to the faster machine)
>
> Just to exclude issues I'd start with something crazy like -cache
> 100000 Unfortunately right now I don't have many more ideas...

Maybe packet loss on lan.

If using wireless don't! or maybe try udpxy, but that would need control
over a box with a good connection.

If wired then test - it doesn't take much loss to mess up a udp tv stream.

Admittedly testing against a little modem box may not work, but you
should be able to get zero loss with something like (as root)

ping -s 1400 -f -c 10000 .......

If you get some loss it's time to start un/re plugging trying/cleaning
different ports etc.