Native format passthrough (BD M2TS, DTS-MA/TrueHD)

[l8router]

I need all logs - please zip everything up and send in to support. Thanks.

No worries. It's sent.

[Paul]

Thanks, I'll get back to you via e-mail.

[l8router]

It worked!

None of the files that I mentioned in the above posts were transcoded last night... all formats that are natively supported by my BDV were streamed "as is" and *decoded* on the BDV all fine.

So successfully delivering truly HD content at last!! :-D


However I have encountered a problem that prevented some M2TS files from being played smoothly on the BDV even when not transcoded. I observed than when total bit rate exceeded 30Mbps (V 30Mbps + A 3Mbps), streaming began stuttering. I wonder if it was due to insufficient buffering when MezzmoMediaServer.exe attempts to fetch content from NAS and immediately streams to the BDV?

My network diagram is:

NAS ---> Mezzmo ---> BDV

[Paul]

I'm glad it's working

M2TS files are quite often limited in their bitrate, so it could be just the device not being able to decode a high bitrate. It's also possible that delivering from the NAS is too slow - perhaps try copying one file to a local disk and see if that works better, then we'll know better what could be the problem.

[l8router]

Hi Dennis,

Yes I did copy the "Black Hawk Down [2011].m2ts" to local disk and it still stuttered when streamed to the BDV. Transfer rate on the NIC to the BDV was about 5MB/s which is fairly moderate at the time, which baffled me coz I remember seeing the BDV handling higher rates without problem.

Will something like "enabling chunked transfer mode" help resolving this?

[Paul]

We could try increasing Mezzmo's transfer packet size to see if that helps.

To do that, add:

<packetsize>4096000</packetsize>

under the "<transcoding>" at the top of the device profile, restart the server and try again. This'll change the packet size from the default 256KBs to 4MBs.

[l8router]

Ok, modified and restarted. Should this not work tonight is there any other parameter I can tweak?

Thanks!

[Paul]

Hmm, not really. If it doesn't work (try adjusting it to a few values from 512 KBs upwards), then most likely the BDP cannot handle such high bitrates in an MPEG-TS container.

[l8router]

Hmm... ok... well as I said in a previous post I burnt it to BD50 and it played fine. The file is just a result of Ts_Muxer from a BD iso, and the BDP handled it perfectly when it's on the disc.

Will see if the new packet size setting works. I'm very happy with the progress we have made so far, just hoping to move stuff one step forward to enable something I call "Native BD over Ethernet".

[Paul]

Burning movies to disk or playing through USB is not the same as serving via DLNA, so it doesn't tell us whether this file will be played by the BDP when it's streamed. Internally it triggers a different engine, so it just may fail.