[MPlayer-users] rtmp audio only

[Reimar Döffinger]

On Tue, Aug 07, 2012 at 12:32:02PM +0100, Karoly Horvath wrote:
> Hi,
> 
> I tried to play an rtmp audio only (radio) stream, but it hangs for
> more than 90 seconds:
> With a flash player it starts almost instantly.
> 
> mplayer -vo null -ao pcm:fast:file=test.wav ....
> 
> Tue Aug  7 11:50:14 BST 2012
> -rw-r--r-- 1 root root 65580 2012-08-07 11:49 test.wav
> ..... (nothing happening)
> Tue Aug  7 11:51:57 BST 2012
> -rw-r--r-- 1 root root 65580 2012-08-07 11:49 test.wav
> Tue Aug  7 11:51:58 BST 2012
> -rw-r--r-- 1 root root 34340864 2012-08-07 11:51 test.wav
> 
> I see that mplayer reads the stream, because the cache is filled quite fast.
> I also created a simple audio filter, basically whenever af->play is
> called, it will dump some data to the console.
> I don't see any output for 90 seconds, then suddenly I see a big
> burst, and lots of samples (from the previous 90 seconds) being
> processed.
> 
> mplayers works perfectly for all the other streams I tested http,
> rtsp, ... A+V streams and A(udio) only streams. It even works fine
> with rtmp A+V streams.
> 
> It all looks like a buffering issue, but I have no idea why it only
> happens with this specific protocol and audio only streams.
> 
> Any idea how to fix this?
> 
> 
> Output can be seen here: http://pastebin.com/5rDepBZH  (note: I
> changed the stream url in the output)

Looks like MPlayer is expecting/waiting for a video stream.
Try with with an explicit -novideo.