https://wiki.multimedia.cx/index.php?action=history&feed=atom&title=JAM 2026-04-10T09:41:42Z Revision history for this page on the wiki MediaWiki 1.39.5 https://wiki.multimedia.cx/index.php?title=JAM&diff=15995&oldid=prev 2025-05-14T15:01:43Z

<p>samples</p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 08:01, 14 May 2025</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* Extension: jam</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* Extension: jam</div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* Samples: {{DexvertSamples|video/jamVideo}}</ins></div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>This is a simple video-only format employing LZSS scheme.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>This is a simple video-only format employing LZSS scheme.</div></td></tr> </table>

Sembiance https://wiki.multimedia.cx/index.php?title=JAM&diff=15674&oldid=prev 2022-10-26T11:45:51Z

<p>fill description</p> <p><b>New page</b></p><div>* Extension: jam<br /> <br /> This is a simple video-only format employing LZSS scheme.<br /> <br /> File header (all values are little-endian):<br /> 4 bytes - &quot;JAM\0&quot;<br /> 4 bytes - width<br /> 4 bytes - height<br /> 4 bytes - number of frames<br /> <br /> Frame data has the following header:<br /> 4 bytes - chunk type (0 - video, 2 - palette, 3 - some control data)<br /> 4 bytes - compression method (0 - differential LZSS, 1 - LZSS, 2 - unpacked)<br /> 4 bytes - packed size (including the header)<br /> 4 bytes - unpacked size<br /> <br /> === LZSS compression ===<br /> <br /> The compression is the usual one with flags being packed into 32-bit LE, LSB first. Set bit means literal, zero bit means copy. For copy mode 16-bit LE word is read, top five bits are copy length minus three, bottom eleven bits are copy offset (plus 2081 for normal mode, plus 1024 when data is copied from the previous frame).<br /> <br /> === Games using JAM ===<br /> * [https://www.mobygames.com/game/gex-enter-the-gecko_ Gex 3D: Enter the Gecko]<br /> * [https://www.mobygames.com/game/windows/hot-wheels-stunt-track-driver Hot Wheels: Stunt Track Driver]<br /> <br /> [[Category:Game Formats]]</div>

Kostya