Flac to MP3 transcodiing results in "choppy" sound

The competitor product uses Lame directly.

Do you know what parameters it's using?

Yes, but it's probably violating this commercial product's IP to publish it here.
If as a forum admin you can deduce my email, its best we discuss how this might be addressed offline.

[Illico]

Probably a stupid question : Do you try Flac to LPCM transcoding? That can solved your "choppy" sound result, but I know that does not solved the base problem.

Probably a stupid question : Do you try Flac to LPCM transcoding? That can solved your "choppy" sound result, but I know that does not solved the base problem.

Not a stupid question. FLAC > LPCM works just fine. Unfortunately the target devices only support MP3 so this doesn't help.

To close this off, please see https://bitbucket.org/xnejp03/serviio/i ... -in-choppy.

This is nothing to do with ffmepg version, CBR vis VBR, and other explored causes. Nor is it specific to transcoding from a specific formats.

Serviio serves transcoded files as a chunked stream, as per the DLNA specification but some media renderers do not process chunked streams as they should. The problem is with some renderers which do not process chunked streams correctly. Ideally these non-compliant renderers should be fixed. Still, it would be a nice enhancement to Serviio to disable chunking on a per profile basis to work around the deficiencies in these renderers.