Adding Colour Matrix flags! How do I do it?

[coastline]

I want to take an MKV of a Bluray disc and add colour matrix flags for BT.709.

I don't want to convert the colour matrix as it is already BT.709 I just want to explicitly set the flags.

I have no idea of the steps/software required for this but believe it should be possible. I believe the flags I need to set are as follows:

colour_description_present_flag : 1
colour_primaries : 1
transfer_characteristics : 1
matrix_coefficients : 1

The reason for it is a bug in the WDTV Live Media player which defaults to BT.601 for unflagged HD material. This is being fixed but no eta on new firmware and I just want to see the difference before the fix arrives.

I am a complete noob to all this so please any help needs to assume I'm at idiot level!

Many thanks.

P.S. Not sure if the media info makes a difference to the answer or not!

General
Complete name : Highlander.mkv
Format : Matroska
File size : 19.0 GiB
Duration : 1h 56mn
Overall bit rate : 23.4 Mbps
Encoded date : UTC 2009-11-18 10:08:50
Writing application : MakeMKV v1.4.8 beta win(x86-release)
Writing library : libmakemkv v1.4.8 beta (0.7.7/0.8.1) win(x86-release)

Video
ID : 1
Format : VC-1
Format profile : AP@L3
Codec ID : WVC1
Codec ID/Hint : Microsoft
Duration : 1h 56mn
Bit rate : 21.4 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 24.000 fps
Resolution : 24 bits
Colorimetry : 4:2:0
Scan type : Progressive
Bits/(Pixel*Frame) : 0.430
Stream size : 17.4 GiB (92%)

Audio
ID : 2
Format : DTS
Format/Info : Digital Theater Systems
Codec ID : A_DTS
Duration : 1h 56mn
Bit rate mode : Constant
Bit rate : 1 510 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Surround: L R, LFE
Sampling rate : 48.0 KHz
Resolution : 24 bits
Stream size : 1.23 GiB (6%)
Title : 3/2+1
Language : English

[Guest]

Where did you get the MKV file?

[coastline]

Hi neuron2,

I made it using Makemkv. Makemkv seemed to be the easiest solution to rip my Blurays for use on my WDTV, but with the ease of use come less options for changes.

[Blue_MiSfit]

If you were re-encoding to x264 via the CLI interface, you can set these flags. However, I don't know how to do it for an existing VC-1 stream. I'm surprised the WDTV doesn't assme 709 for HD VC-1!!

~MiSfit

[coastline]

Hi Misfit,

for your reply.

I'm surprised the WDTV doesn't assme 709 for HD VC-1!!

As was I

The WDTV Live along with the earlier incarnations and also some other devices (including the PCH C-200,A-100, and A110 - although they do have a fix in Beta firmware testing at the moment I understand) that use the sigma chipset have a bug which defaults to BT.601 for unflagged material.

If your interested here's a link to my thread on the issue. There's a link to a thread where sigma themselves confim the issue.

http://wdtvforum.com/main/index.php?topic=3109.0

It took me a while but I finally managed to get WD to accept it as a bug but they will not give an ETA on a fix.

It's a great little device apart from that!