HELP - Creating custom AVCHD menu from scratch

[Glorioso]

Originally Posted by deank

Have anyone of you seen THUMBNAIL preview of an AVCHD folder on their PS3 or other AVCHD player?

There is a folder and files:

<root>\AVCHD\AVCHDTN\THUMB.TDT (which is a simple JPG)

and

<root>\AVCHD\AVCHDTN\THUMB.TID

Dean

deank, how can i manualy create the thumbnail?

[deank]

It was my question if anyone has ever seen such thumbnail.

The thumbnail is a small JPG file. PS3 doesn't show thumbnails from USB as we all know... I don't know how this could be used or it is just generated by AVCHD camcoders and Panasonic HD writer.

[deank]

Here's a small thought on the 'custom menu' issue...

Using avisynth and x264 for showing 10-40 lines of text is like using a bulldozer to dig a hole to plant a single flower.

Using Java TV and BD-J should make things far-far easier.

But before I start working on it - does anyone know if BD-J works if authored in AVCHD format written on a DVD or USB?

I've seen a lot of BD-J games in the past, but I can't make them work now.

[deank]

Is there an easy way to find the Palette Segment in a m2ts file?

I can change the color of the Interactive Graphics Stream, but I don't know what is in the color look-up table and the colors are randomly selected.

I see three values for color index + one for alpha (opacity).

For example I have these:

11101011 10000000 10000000 (EB 80 80 - WHITE)
00010000 10000000 10000000 (10 80 80 - BLACK)
10101101 00011010 00101010 (AD 1A 2A - GREEN)
00111111 11110000 01100110 (3F F0 66 - RED)

These represent the color and another byte for alpha.

I struggle to find how to use this 8 bit Index lookup table.

Thanks.

***

The first byte seems to be the luminosity strenght, the second and third define the color...
I'm not sure if it is in YCrCb format..

***

edit again..

It is YCrCb...

[deank]

I will implement custom color for IGS in multiAVCHD using RGB->YCrCb with the following settings

Y = CA*R + (1–CA–CB)*G + CB*B
R–Y = (1–CA)*R + (CA+CB–1)*G – CB*B
B–Y = –CA*R + (CA+CB–1)*G + (1–CB)*B

NTSC CA = 0.2568
NTSC CB = 0.0979

PAL CA = 0.1819
PAL CB = 0.0618

I decided to use NTSC and PAL CA/CB values as set by ITU 709 for full color range (0-255).

I will report after I test how it works.

[deank]

RGB to YCrCb conversion for IGS in multiAVCHD was taken from this page

Credits to the authors at www.fourcc.org.

[wangzongjun]

Can anybody help me?
I read a PES Packet from *****.m2ts file(TS packet's PID = 0x1400[Interactive Graphics Stream])and parse the PES header ,but i do not know the remain data.I think it hold the blu-ray menu information,such as palete,navigation command and so on.Can anyone give me some suggestion ?