#1 Burning Software

Hello,

We purchased your StarBurn SDK, and used the latest version. But our test team found a problem, you can open attached file and check.
We set DVD & BD starburn burn speed 1X 2X 3X, the Starburn real burn/write speed should change according to proportion change, but it doesn't.
Could you explain for us?
DVD:1X 1385kbps write=3324
2X 2770kbps write=3324
3X 4155kbps write=3324
4X 5540kbps write=5540
5X 6925kbps write=5540
BD: 1X 4495kbps write=8990
2X 8991kbps write=8990
3X13485kbps write=8990
1) Why the real write speeds are always not the speeds we set? Only DVD 4X and BD 2X are right.
2) We need the burn speed change according to proportion change, does the product work?
3) If it is a bug, when will you fix it?

Best regards,
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As you replied:

1) Making long story short: everything works as expected. Disc DOES NOT allow everything you set to to so it accepts the set speed and pick up closest one it supports.

2) Not going to work with anything on Earth. You CANNOT set random numbers as performance it's not a car you can drive 35 or 89 mph or whatever.

3) It's not a bug.
=========================
Then our techncians want to know:
1) How to get the minimum and maximum burn/write speed?
2) Can't we set any integral multiple speed between the minimum burn speed and the maximum burn speed?
3) If our test data is normal, if the setting is invalid, what's the value/point of the setting of 1X 2X 3X?
Strangely, I got The extension txt/doc is not allowed.
So attached our test data here
DVD:1X
dvdtool: set starburn burn speed 1385kbps [Tue Jun 17 01:54:02 2014] [Tue Jun 17 01:54:02 2014]
dvdtool: starburn real burn speed [read=11080, max_read = 5540; write=3324, max_write=5540] [Tue Jun 17 01:54:02 2014] [Tue Jun 17 01:54:02 2014]

DVD:2X
dvdtool: set starburn burn speed 2770kbps [Tue Jun 17 02:02:30 2014] [Tue Jun 17 02:02:30 2014]
dvdtool: starburn real burn speed [read=11080, max_read = 5540; write=3324, max_write=5540] [Tue Jun 17 02:02:31 2014] [Tue Jun 17 02:02:31 2014]

DVD:3X
dvdtool: set starburn burn speed 4155kbps [Tue Jun 17 02:12:47 2014] [Tue Jun 17 02:12:47 2014]
dvdtool: starburn real burn speed [read=11080, max_read = 5540; write=3324, max_write=5540] [Tue Jun 17 02:12:47 2014] [Tue Jun 17 02:12:47 2014]

DVD:4X
dvdtool: set starburn burn speed 5540kbps [Tue Jun 17 02:05:58 2014] [Tue Jun 17 02:05:58 2014]
dvdtool: starburn real burn speed [read=11080, max_read = 5540; write=5540, max_write=5540] [Tue Jun 17 02:05:58 2014] [Tue Jun 17 02:05:58 2014]

DVD:5X
dvdtool: set starburn burn speed 6925kbps [Tue Jun 17 02:23:48 2014] [Tue Jun 17 02:23:48 2014]
dvdtool: starburn real burn speed [read=11080, max_read = 5540; write=5540, max_write=5540] [Tue Jun 17 02:23:48 2014] [Tue Jun 17 02:23:48 2014]

BD:1X
dvdtool: set starburn burn speed 4495kbps [Tue Jun 17 01:26:34 2014] [Tue Jun 17 01:26:34 2014]
dvdtool: starburn real burn speed [read=26970, max_read = 8990; write=8990, max_write=8990] [Tue Jun 17 01:26:34 2014] [Tue Jun 17 01:26:34 2014]

BD:2X
dvdtool: set starburn burn speed 8991kbps [Tue Jun 17 01:13:58 2014] [Tue Jun 17 01:13:58 2014]
dvdtool: starburn real burn speed [read=26970, max_read = 8990; write=8990, max_write=8990] [Tue Jun 17 01:13:58 2014] [Tue Jun 17 01:13:58 2014]

BD:3X
dvdtool: set starburn burn speed 13485kbps [Tue Jun 17 02:36:33 2014] [Tue Jun 17 02:36:33 2014]
dvdtool: starburn real burn speed [read=26970, max_read = 8990; write=8990, max_write=8990] [Tue Jun 17 02:36:33 2014] [Tue Jun 17 02:36:33 2014]

Regards,

Nothing attached. Can you re-check please?

1) There's a limited set of speeds drive support. So it can do say 2x, 4x and 8x but not 6x or 3x. You need to set possible ones one-by-one immediately querying what drive set. Then you'll have a full list of this particular combination.

Typically you just use MAXIMUM_SPEED wildcard (0xFFFF if you care).

2) It's not something you can do physically... Neither with StarBurn nor with anything else. If device rejects to set say 40x for CD (keeping in mind 48x is supported) you cannot force it doing that. Also you cannot set just random performance numbers like 3.4x or 18.2x or whatever.

3) It's not a bug it's a way things work