philippe_44 wrote: > I've added a dev version 1.2.0.1 which is a bit more aggressive wrt to > 'raw' PCM utilisation. Basically, when using 'pcm' transcoding and > receiving a compressed format, it will try to use 'raw' even if the > sample size is kept to source and sample rate kept to source ot "No > higher" is set. > > It does that by asking LMS the *original* source file's sample rate & > size and trying to see if the player would accept these (if the no > higher option is ticked, it will try that for the maximum rate, not the > source file's one). If the player accept these, it's a go. > > Now, the actual rate and size are only known when the audio data is > received, so it will tell the UPnP player, in the initial "play" request > that it will receive pcm, but details are still unknown, which seems to > be accepted by all my players so far. Then, when starting to send the > actual data, it tell in the HTTP header the real rate and size. > > The issue is if you do transcode in LMS to a *higher* sample size & rate > (C3PO for example) than the file's originals and these rate/size are not > accepted by the player, playback will fail at the late stage. Seems to > me it's an acceptable trade-off but now I need to know if UPnP devices > widely accept this "pcm will be sent but unkown details at this time" > play request. > > As a reminder, if sample rate and size are set to fixed values, none of > these potential problems will happen. I'm not sure I really understand this, sorry. It's just getting too complicated for me.
I have tried some tests on my Marantz. It doesn't seem to accept 'raw' at all (I don't think it ever did). However, something odd is happening. If I set it all to wav 96000 and play a 96000 track, 'No Higher' off, all is well - the log says it plays at 24/96000. If I play a 192000 track it claims to be transcoding from 48000 to 96000 (C3PO is not enabled). If I set 'No Higher' and play the 192000 track it says it's playing at 48000, no transcoding, but I get no sound. If I play the same 192000 track on my M1, it plays at 192000 and doesn't need to transcode (that rate is supported). I assume that my Marantz is saying 48000 is its max rate (that's what the manual says - wav 16/48000) and LMS gets to hear about it and is transcoding itself, or else the information of the log is not what I think it is. All a bit of a puzzle. I can get things to play, so it's not a problem, but I don't understand what is happening. LMS 7.9.1 on VortexBox Midi box, Xubuntu 17.10, FLACs 16->24 bit, 44.1->192kbps. Touch & EDO. 2nd Touch standard. LMS plugin UPnP/DLNA Bridge to MF M1 CLiC (to A308CR amp & ESLs) & Marantz CR603 UPnP renderers. Alternatively Minimserver & Upplay to same & to upmpdcli/mpd PC renderers. Squeezelite to Meridian USB Explorer DAC to PC speakers/headphones. Wireless Xubuntu 17.10 laptop firefox/upplay or Android 'phone with Squeeze-Commander/BubbleUPnP controls LMS/Minimserver. ------------------------------------------------------------------------ PasTim's Profile: http://forums.slimdevices.com/member.php?userid=41642 View this thread: http://forums.slimdevices.com/showthread.php?t=103728 _______________________________________________ plugins mailing list plugins@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/plugins
