Hi Gilou, 2018-07-17 21:27 GMT-05:00 Gilou <contact+...@gilouweb.com>: > > Hi there! > > I wanted to replace a "complicated" setup using named pipes and metadata > passthrough with the "new" pipe() operator, but it craps out if I put it > next to a switch(). > > I'm using the well-known StereoTools from > https://www.stereotool.com/download/stereo_tool_cmd (version 9.01) with > liq 1.3.3 (compiled using opam) on Ubuntu 18.04. > > Current code does output.external() to a named pipe (mkfifo), I then use > input.external() using cat to stream it back to liq, then to icecast. > That works nicely and has for quite some time now, but it's a bit bulky > especially when you have to handle metadata. > > So I did: > > pl1 = playlist("music1") > pl2 = playlist("music2") > > radio = switch([ > ({ 0h-12h }, pl1), > ({ 12h-0h }, pl2) > ]) > > cross = smart_crossfade(radio) > > binary = "/usr/local/bin/stereo_tool_cmd_64" > preset = "GENERIC PRESETS/Jeff - Groove! (soft)" > cmd = binary ^ " -p '" ^ preset ^ "' -q - - 2>/dev/null" > > # stereo_tool_cmd_64 takes an input and an output file > # treats - as stdin / stdout > # -q means quiet > # cmd should look like: > # stereo_tool_cmd_64 -p 'preset' -q - - 2>/dev/null > flux_traite = mksafe(pipe(id="st", process=cmd, cross)) > > output.icecast(…, flux_traite) > > And after the first song is played, the next ones starts, then it seems > that stereotools crashes, so liq switches to blank, then back on the pipe. > > So I thought, let's add some buffer on the pipe! > But well, I tried up to 15s and it didn't help. > I removed everything and debuggged my way until I found it works as > expected as long as I don't use switch()... > > Then I thought... Maybe it's using the same clock and getting lost > trying to sync (not sure how it does it then but well) ? > So I gave pipe its own clock: > flux_traite = mksafe(clock(pipe(id="st", process=cmd, cross))) > > That fails too. So I thought maybe stereotool thinks the file ends for > some reason.. And added a buffer on the source (the smart_crossfade here) > > cross = buffer(smart_crossfade(radio), buffer=3.0) > flux_traite = mksafe(pipe(id="st", process=cmd, cross)) > > And... it looks like it works but the buffer() probably doesn't like the > situation: > 2018/07/18 03:12:29 [warp_prod_8852:3] Buffer emptied, start buffering... > 2018/07/18 03:12:33 [warp_prod_8852:3] Buffer emptied, start buffering... > > And liq uses an awful lot of CPU then, even crashing... > Segmentation fault (core dumped) > > If I put the switch() off, it works as expected (the oiginal script has > playlist, rotate, ....) > > Help ? ;)
I'm gonna have a look at this asap, thanks for reporting. Romain ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Savonet-users mailing list Savonet-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/savonet-users
