Check out the Matroska website:http://www.matroska.org/
It seems that you may need to adjust the time elements in the SRT file.
From the tech info: Subtitles / SRT
"SRT is perhaps the most basic of all subtitle formats.
It consists of four parts, all in text..
1. A number indicating the which subtitle it is in the sequence.
2. The time that the subtitle should appear on the screen, and then disappear.
3. The subtitle itself.
4. A blank line indicating the start of a new subtitle.
When placing SRT in Matroska, part 3 is converted to UTF-8 and placed in the data portion of the Block.
Part 2 is used to set the timecode of the Block, and BlockDuration element. Nothing else is used.
Here is an example SRT file:
00:02:17,440 --> 00:02:20,375
Senator, we're making
our final approach into Coruscant.
00:02:20,476 --> 00:02:22,501
Very good, Lieutenant.
In this example, the text "Senator, we're making our final approach into Coruscant."
would be converted into UTF-8 and placed in the Block. The timecode of the block would be set to "00:02:17,440".
And the BlockDuration element would be set to "00:00:02,935".
The same is repeated for the next subtitle.
Because there are no general settings for SRT, the CodecPrivate is left blank. "
All answers from others welcome, as I have no experience of Matroska, only a general awareness of it.
Edited by petewills , 25 July 2010 - 10:29 AM.