MKV - Transcoding only AUDIO and Passing-Through VIDEO

[ruiseixas]

Hi,

I have the old Popcorn A-100, that is unable to downmix the DTS soundtrack. I'm trying to configure the UMS to only transcode the DTS soundtrack to LPCM, and maintain the videotrack as h.264. The problem is that the UMS is unable to transcode only the soundtrack, it also requires the transcode of the videotrack from h.264 to MPEG2... My PC has a limited processor, and isn't fast enough to transcode AUDIO and VIDEO at the same time. One additional odd thing, is that my Popcorn sees the file as VOB intead as MKV when I transcode the MKV...!

How can I configure UMS to it ONLY transcode the soundtrack living alone the VIDEO (Pass-Through)?

Here is the configuration file for my Popcorn A-100:

Code: Select all

#----------------------------------------------------------------------------
# Profile for Popcorn Hour.
# See PS3.conf for a description of all possible configuration options.
#

RendererName=Popcorn Hour
RendererIcon=popcornhour.png
UserAgentSearch=POSIX|SYABAS|SMP8634|Firefox/0\.8\.0|C200
Video=true
Audio=true
Image=true
SeekByTime=false
TranscodeVideo=MPEGPSAC3
TranscodeAudio=LPCM
DefaultVBVBufSize=true
MuxH264ToMpegTS=true
MuxDTSToMpeg=false
WrapDTSIntoPCM=false
MuxLPCMToMpeg=false
MaxVideoBitrateMbps=0
MaxVideoWidth=0
MaxVideoHeight=0
TranscodeExtensions=mkv,dts
StreamExtensions=hdmov,hdm,flac,fla,ogg,asf,asx,m2v

Thanks,
Rui

[ExSport]

It works for PS3/PanTV so it should also work for your Popcorn. Only difference should be that Popcorn accept MKV natively but other renderers are using tsMuxeR engine which changes container to .m2ts.
When you will use [MEncoder] engine and tick "remux video with tsMuxeR when possible instead of transcoding":
- when "keep DTS track" unticked, UMS will convert audio to AC3
- when "keep DTS track" unticked and "Use LPCM for audio" is ticked, UMS will convert audio to PCM/Linear PCM
If video will be H264 (almost all MKV videos), option "remux instead of transcoding" will remux it only so no conversion is used, as UMS settings states

[ruiseixas]

Thanks for your reply, I will try that just to see how it works.

Any way, I found a post in a forum in http://www.mpcclub.com where you can download a firmware that allows you to downmix DTS in the Popcorn A-100, so I think the problem is solved in this case. The post is here:

• http://www.mpcclub.com/forum/showthread.php?t=22959

Now that it works just fine, including the NMT Applications, it's no need to transcode anything!

Regards,
Rui