[OpenIndiana-discuss] Comments, please! problem with ffmpeg that seems to be a problem with OI at driver or basic library level

[Hans J. Albertsson]

I regularly download ( quite legally, I'm told ) HLS streams from 
svtplay.se using ffmpeg and a stream URL obtained by scraping the 
svtplay.se/<show-link> page.

This works very well in Ubuntu and Windows on a separate PC.

Under OI and even in W XP inside a VirtualBox VM it hangs, seemingly at 
random positions in the stream. The ffmpeg process is totally inert upon 
hanging, and one must kill it by two consecutive ^C. It doesn't respond 
to the on the fly command language at all.

The hang is in pollsys, as demonstrated by the following truss -f output 
excerpt from the hanging ffmpeg process.

29961:    pollsys(0x08046768, 1, 0x08046718, 0x00000000)    = 0
29961:    pollsys(0x08046768, 1, 0x08046718, 0x00000000)    = 0
29961:    pollsys(0x08046768, 1, 0x08046718, 0x00000000)    = 0
29961:    pollsys(0x08046768, 1, 0x08046718, 0x00000000)    = 0
29961:    pollsys(0x08046768, 1, 0x08046718, 0x00000000)    = 0
29961:    pollsys(0x08046768, 1, 0x08046718, 0x00000000)    = 0
29961:    pollsys(0x08046768, 1, 0x08046718, 0x00000000)    = 0
29961:    pollsys(0x08046768, 1, 0x08046718, 0x00000000)    = 0


I guess that the fact it happens in the W XP in vbox the same as in OI 
itself indicates the problem somehow involves code residing under the 
Vbox VM, even, and that it's some sort of incompatibility that only will 
actually have an effect under some sort of race or race-like condition.

I'd appreciate any insight any of you could offer into what this entails