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MPEG2 HP@HL vs MP@HL

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Frippy
MPEG2 HP@HL vs MP@HL
on Jan 7, 2007 at 5:19:44 am

Hi all!
I have MPEG2 rip from HD-DVD disk (i dont know how this file was created)
I know only one - file from hd-dvd, encoded as MPEG2 1920x1080x29.97, DC9, HP@HL.
By reading Sonic Scenarist specifications i know, that HD-DVD accept only MP@HL MPEG2 files.

Questions:
1. How i can convert HP@HL to MP@HL without recompression ?
2. How this converted file be playable on hardware players?
3. By HD-DVD spec. (not Sonic) - HP@HL can be on HD-DVD?



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Charles Simonson
Re: MPEG2 HP@HL vs MP@HL
on Jan 8, 2007 at 8:49:34 pm

1.) You can't change profiles without re-encoding.
2.) Don't know.
3.) I wasn't aware HP is a valid profile for HD-DVD. Wouldn't surprise me if that has been added though.



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Frippy
Re: MPEG2 HP@HL vs MP@HL
on Jan 9, 2007 at 5:21:54 am

[Charles Simonson] "You can't change profiles without re-encoding."

I'm encode (with Procoder) two files: first with hp@hl and second with mp@hl.
And i see, that this files differs....ONLY profile/level setting:

HP@HP hex dump
00 00 01 B3 78 04 38 33 │ 18 6A 37 51 10 11 11 12
12 12 13 13 13 13 14 14 │ 14 14 14 15 15 15 15 15
15 16 16 16 16 16 16 16 │ 17 17 17 17 17 17 17 17
18 18 18 18 18 18 18 19 │ 1A 19 1A 1A 19 1B 1B 1B
11

MP@HL hex dump
00 00 01 B3 78 04 38 33 │ 18 6A 32 A9 10 11 11 12
12 12 13 13 13 13 14 14 │ 14 14 14 15 15 15 15 15
15 16 16 16 16 16 16 16 │ 17 17 17 17 17 17 17 17
18 18 18 18 18 18 18 19 │ 1A 19 1A 1A 19 1B 1B 1B
1A 1B 1C 1C 1C 1C 1E 1E │ 1E 1F 1F 21 00 00 01 B5
14

it's differs only at offsets #0A, #0B and #50. All other data is same data.

What can you say? :)

IMHO, i can to create small utility to chagne profile/level settings




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Charles Simonson
Re: MPEG2 HP@HL vs MP@HL
on Jan 9, 2007 at 5:31:04 pm

Go for it then. If it is just a matter or changing the header, which it could be if the encoding parameters didn't negate something from one profile to the other, then a simple editing of the binary should be sufficient. You wouldn't even need to write anything, just download a binary editor and you would be good.



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Frippy
Re: MPEG2 HP@HL vs MP@HL
on Jan 9, 2007 at 7:20:45 pm

IMHO best way - once create utility
...today MPEG2, tomorrow MPEG2.. :)





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