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[simoncn]

(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.