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[simoncn]

(18-12-2013 10:50)simoncn Wrote:  

(18-12-2013 09:35)scrutney2 Wrote:  I did think that, but I changed the stream.converter property from ffmpeg to avconv, and got a message saying this program is not installed, which suggests that ffmpeg is installed.. If in fact I don't have a transcoding converter installed, any pointers would be appreciated!

Your setup is correct. I am able to reproduce this problem when transcoding ALAC files using ffmpeg on my Synology. The audio is playing OK when I transcode ALAC files using ffmpeg on my QNAP, so I suspect there is some issue with the version of ffmpeg that is preinstalled by Synology. I'll do some investigation and post back here when I have more information.

It appears there was an incompatible change to the spelling of an ffmpeg option in November 2012. Before that date, this option was specified as '-request_sample_fmt flt' and after that date it was specified as '-request_sample_fmt float'. The problem with ALAC and Synology is caused by MinimStreamer's use of the older 'flt' syntax, which is rejected by the newer ffmpeg version installed by Synology.

The best solution I can think of at the moment is for MinimStreamer to do "dummy" invocations of ffmpeg with each spelling to find the spelling that works, then use this spelling in the "real" invocation of ffmpeg.

Edit: This problem isn't caused by an incompatible change to FFmpeg. See this post for details.