ffmpeg + sox transcoding and gapless playback

[simoncn]

I tried this with the latest Volumio 2.001 on a Raspberry Pi 2 with an IQAudio DAC+.

I thought I heard a slight tick on one track transition but I have not heard this on other transitions.

From looking at the MinimServer debug log, Volumio is loading and buffering the audio data at least 30 seconds before playing it, so the issue when using Volumio is definitely not related to a slower response to a request for audio data when MinimServer is doing on-the-fly transcoding.

Is it possible that the renderer is fetching an album art image from the server when changing to the next track? You could check this by setting the logging level to Debug and observing the MinimServer log window in real time when the transition happens.

A WAV stream produced by on-the-fly transcoding does not contain album art but the original FLAC stream can contain embedded album art. This might be a significant difference. When you did offline conversion from FLAC to WAV, did you set the converter to write album art into the WAV file? If so, you could try doing this without writing album art to see if this makes a difference.