Nigel Megitt

@Flavien-Pensato Thank you for your input. It is already called `.travis.yml` - your proposal therefore makes no difference to this issue as far as I can tell?

Thanks for that @pat - apologies for the delay in responding (holidays!).

Seen this again today. Definitely needs some attention.

On closer inspection, unreferenced styles and regions from previous documents are sometimes being inserted into the current document`s styling and layout elements. The references back to styles and regions are...

I think I've ruled this out from being a deduplicator problem - I generated some test content just using the filesystem, so running each component separately, and the deduplicator worked...

A bit of investigation suggests this could be something to do with the `EBUTT3Splicer`, which appears to merge things into objects that are bound elements directly - need to check...

OK, have been looking at this more, and I think I was wrong _again_. Making the deduplicator print its input and output documents shows it is working correctly. Chaining with...

Sigh, this is really not a happy situation. It's definitely an effect that happens only when using direct carriage mechanism, but it is not at all obvious what the cause...

Confirmed - the unwanted behaviour is avoided (worked around) by using a config that uses websocket to make the last hop to the EBU-TT-D Encoder: `(ws)->Delay->Resequence->Deduplicate->(ws)->EBUTTDEncode->(fs)` works fine.

I think this is a comment about event handling (could be thread safety if multi-threaded) and blocking while waiting for the filesystem. In other words although twisted decouples incoming data...