Doom9's Forum - View Single Post - ffdshow tryouts project: Discussion & Development

albain · 13th August 2009, 12:11

I have made a development build for TrueHD/DTSHD/EAC3 passthrough.

I have no idea if it will work because I don't have the equipment.

Requirements :

Windows 7 (I don't think it will work on Vista, unless DirectShow is updated with upcoming WMP12)
A HDMI 1.3 output : Asus xonar, azuentech XFI Home theater HD, Radeon HD4xxxx
A HT system which supports HDMI 1.3 and the decoding of EAC3/TrueHD/DTSHD
M2TS samples with one of the following formats (it won't work on commercial players I guess).
MPC HC
FFDShow configured as followed : in the output section, there are new checkboxes for passthrough. Tick the formats that fit to your equipment

How it works : a new structure is provided in output so that the stream should be passed directly to the audio renderer.
FFDShow does nothing on the stream, it simply adds the correct information in output. MPC-HC will have no idea of this new structure (and does not recognize the new mediatypes yet), and it will pass the audio stream to the renderer with no moditification too.

I think that EAC3 passthrough should work on a SPDIF output (but I am not sure), but for the 2 others HDMI 1.3 is required to transport the audio.

Here is the URL :
http://www.mediafire.com/?sharekey=0...4e75f6e8ebb871

To do next :
1/Make it work
2/Implement PCM/LPCM passthrough too (to avoid OS interfer too)

13th August 2009, 12:11	#7805 \| Link
albain Media Control author Join Date: Dec 2006 Location: Paris Posts: 1,014	I have made a development build for TrueHD/DTSHD/EAC3 passthrough. I have no idea if it will work because I don't have the equipment. Requirements : Windows 7 (I don't think it will work on Vista, unless DirectShow is updated with upcoming WMP12) A HDMI 1.3 output : Asus xonar, azuentech XFI Home theater HD, Radeon HD4xxxx A HT system which supports HDMI 1.3 and the decoding of EAC3/TrueHD/DTSHD M2TS samples with one of the following formats (it won't work on commercial players I guess). MPC HC FFDShow configured as followed : in the output section, there are new checkboxes for passthrough. Tick the formats that fit to your equipment How it works : a new structure is provided in output so that the stream should be passed directly to the audio renderer. FFDShow does nothing on the stream, it simply adds the correct information in output. MPC-HC will have no idea of this new structure (and does not recognize the new mediatypes yet), and it will pass the audio stream to the renderer with no moditification too. I think that EAC3 passthrough should work on a SPDIF output (but I am not sure), but for the 2 others HDMI 1.3 is required to transport the audio. Here is the URL : http://www.mediafire.com/?sharekey=0...4e75f6e8ebb871 To do next : 1/Make it work 2/Implement PCM/LPCM passthrough too (to avoid OS interfer too) Last edited by albain; 13th August 2009 at 12:14.