Hacking the Salora HDD2510

If we put one short movie fragment on the disk, the ‘directory’ is as follows:

'address'  name
57004300 /VR_MANGR.IFO
67002a00 /rtav/VOB00001.ttm
5b006300 /rtav/VOB00001.vtm
59006300

So a movie consists of 2 VOB files, a .ttm and a .vtm file.”A VOB file (Video Object) is a container format contained in DVD-Video media. It contains the actual Video, Audio, Subtitle (VobSubs) and Menu contents in stream form.” (wikipedia).

The addresses are not in increasing order…

After some scanning I found that the movie starts at 4a71ee00 and is subdivided in 2K blocks, each starting with header ba010000. If we swap endianness, we get the MPEG pack header 000001ba. Apparently, the SALORA HDD2510 is a big-endian machine.

In our case the movie has a size of 2238 blocks, or 4583424 bytes.

This entry was posted on Wednesday, January 16th, 2008 at 10:45 pm and is filed under The file system. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.