https://wiki.multimedia.cx/index.php?title=CMV&feed=atom&action=history
CMV - Revision history
2024-03-29T00:11:12Z
Revision history for this page on the wiki
MediaWiki 1.39.5
https://wiki.multimedia.cx/index.php?title=CMV&diff=13693&oldid=prev
Ce at 20:31, 11 November 2011
2011-11-11T20:31:09Z
<p></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 13:31, 11 November 2011</td>
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<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: cmv</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: cmv</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;"><div>* Company: [[Creative]]</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>* Company: [[Creative]]</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: [http://samples.mplayerhq.hu/game-formats/ea-cmv/ http://samples.mplayerhq.hu/game-formats/ea-cmv/]</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;"><div>* Based on: [http://vanbeveren.byethost13.com/docs/cmv-format.txt http://vanbeveren.byethost13.com/docs/cmv-format.txt]</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>* Based on: [http://vanbeveren.byethost13.com/docs/cmv-format.txt http://vanbeveren.byethost13.com/docs/cmv-format.txt]</div></td></tr>
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Ce
https://wiki.multimedia.cx/index.php?title=CMV&diff=11913&oldid=prev
Vincent: added specification of 10MB
2009-08-27T11:52:24Z
<p>added specification of 10MB</p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 04:52, 27 August 2009</td>
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<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>* Based on: [http://vanbeveren.byethost13.com/docs/cmv-format.txt http://vanbeveren.byethost13.com/docs/cmv-format.txt]</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>* Based on: [http://vanbeveren.byethost13.com/docs/cmv-format.txt http://vanbeveren.byethost13.com/docs/cmv-format.txt]</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" 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: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The CMV is a video format introduced in Creative's ZEN MX. It probably stands for 'Creative Media Video' (like WMV stands for Windows Media Video). However, there are no resources on this. It is much a guess. In this format Creative has attempted to use as little licensed codecs and complexity as possible. The compression performance of the format is terrible, about 10MB per minute. </div></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>The CMV is a video format introduced in Creative's ZEN MX. It probably stands for 'Creative Media Video' (like WMV stands for Windows Media Video). However, there are no resources on this. It is much a guess. In this format Creative has attempted to use as little licensed codecs and complexity as possible. The compression performance of the format is terrible, about 10MB per minute <ins style="font-weight: bold; text-decoration: none;">at 320x240 at 25fps</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>= Technical description =</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>= Technical description =</div></td></tr>
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Vincent
https://wiki.multimedia.cx/index.php?title=CMV&diff=11905&oldid=prev
Vincent: modified header description, removed tabs, compacted
2009-08-20T06:56:24Z
<p>modified header description, removed tabs, compacted</p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 23:56, 19 August 2009</td>
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<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> Offset Length Description</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> Offset Length Description</div></td></tr>
<tr><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: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <del style="font-weight: bold; text-decoration: none;">------ ------- ----</del>-----------------------------------------------------------------------------------------</div></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> ------ ------- ----------------------------------------------------------------------------</div></td></tr>
<tr><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: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> 0 3 Signature, "CMV"</div></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> 0 <ins style="font-weight: bold; text-decoration: none;"> </ins>3 <ins style="font-weight: bold; text-decoration: none;"> </ins>Signature, "CMV"</div></td></tr>
<tr><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: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> 3 3 Major version, char encoded = "001"</div></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> 3 <ins style="font-weight: bold; text-decoration: none;"> </ins>3 <ins style="font-weight: bold; text-decoration: none;"> </ins>Major version, char encoded = "001"</div></td></tr>
<tr><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: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> 6 3 Minor version, char encoded = "000"</div></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> 6 <ins style="font-weight: bold; text-decoration: none;"> </ins>3 <ins style="font-weight: bold; text-decoration: none;"> </ins>Minor version, char encoded = "000"</div></td></tr>
<tr><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: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> 9 3 Width of video pixels</div></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> 9 <ins style="font-weight: bold; text-decoration: none;"> </ins>3 <ins style="font-weight: bold; text-decoration: none;"> </ins>Width of video pixels</div></td></tr>
<tr><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: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> 12 3 Height of video in pixels</div></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> 12 <ins style="font-weight: bold; text-decoration: none;"> </ins>3 <ins style="font-weight: bold; text-decoration: none;"> </ins>Height of video in pixels</div></td></tr>
<tr><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: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> 15 3 ? horizontal block size, usually 16 - used for rounding the dimensions of the video</div></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> 15 <ins style="font-weight: bold; text-decoration: none;"> </ins>3 <ins style="font-weight: bold; text-decoration: none;"> </ins>? horizontal block size, usually 16</div></td></tr>
<tr><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: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> 18 3 ? vertical block size, usually 16 - used for rounding the dimensions of the video</div></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;"> </ins>- used for rounding the dimensions of the video</div></td></tr>
<tr><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: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> 21 3 chunk-size in bytes</div></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> 18 <ins style="font-weight: bold; text-decoration: none;"> </ins>3 <ins style="font-weight: bold; text-decoration: none;"> </ins>? vertical block size, usually 16</div></td></tr>
<tr><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: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> 24 3 number of frames per chunk (usually <del style="font-weight: bold; text-decoration: none;">equal to the </del>FPS) <del style="font-weight: bold; text-decoration: none;"> </del><--+</div></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;"> </ins>- used for rounding the dimensions of the video</div></td></tr>
<tr><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: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> 27 3 Number of frames in file <del style="font-weight: bold; text-decoration: none;"> </del>|</div></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> 21 <ins style="font-weight: bold; text-decoration: none;"> </ins>3 <ins style="font-weight: bold; text-decoration: none;"> </ins>chunk-size in bytes</div></td></tr>
<tr><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: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> 30 3 unknown, value = 1 <del style="font-weight: bold; text-decoration: none;"> </del>| <del style="font-weight: bold; text-decoration: none;">! Might </del>be the other way around</div></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> 24 <ins style="font-weight: bold; text-decoration: none;"> </ins>3 <ins style="font-weight: bold; text-decoration: none;"> </ins>number of frames per chunk (usually <ins style="font-weight: bold; text-decoration: none;">== </ins>FPS) <--+</div></td></tr>
<tr><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: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> 33 3 unknown, value = 0 <del style="font-weight: bold; text-decoration: none;"> </del>|</div></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> 27 <ins style="font-weight: bold; text-decoration: none;"> </ins>3 <ins style="font-weight: bold; text-decoration: none;"> </ins>Number of frames in file <ins style="font-weight: bold; text-decoration: none;"> </ins>|</div></td></tr>
<tr><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: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> 36 3 FPS (usually 25) <del style="font-weight: bold; text-decoration: none;"> </del><--+</div></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> 30 <ins style="font-weight: bold; text-decoration: none;"> </ins>3 <ins style="font-weight: bold; text-decoration: none;"> </ins>unknown, value = 1 <ins style="font-weight: bold; text-decoration: none;"> </ins>| <ins style="font-weight: bold; text-decoration: none;">May </ins>be the other way around</div></td></tr>
<tr><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: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> 39 12 0x010101 0x010101 0x010101 0x010101 unknown / reserved</div></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> 33 <ins style="font-weight: bold; text-decoration: none;"> </ins>3 <ins style="font-weight: bold; text-decoration: none;"> </ins>unknown, value = 0 <ins style="font-weight: bold; text-decoration: none;"> </ins>|</div></td></tr>
<tr><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: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> 51 <del style="font-weight: bold; text-decoration: none;"> </del>end of header </div></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> 36 <ins style="font-weight: bold; text-decoration: none;"> </ins>3 <ins style="font-weight: bold; text-decoration: none;"> </ins>FPS (usually 25) <ins style="font-weight: bold; text-decoration: none;"> </ins><--+</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> 39 <ins style="font-weight: bold; text-decoration: none;"> </ins>12 <ins style="font-weight: bold; text-decoration: none;"> </ins>0x010101 0x010101 0x010101 0x010101 unknown / reserved</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> 51 <ins style="font-weight: bold; text-decoration: none;"> </ins>end of header </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>All descriptions starting with a question mark are guesses.</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>All descriptions starting with a question mark are guesses.</div></td></tr>
</table>
Vincent
https://wiki.multimedia.cx/index.php?title=CMV&diff=11904&oldid=prev
Vincent at 06:52, 20 August 2009
2009-08-20T06:52:12Z
<p></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 23:52, 19 August 2009</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l27">Line 27:</td>
<td colspan="2" class="diff-lineno">Line 27:</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> | HEADER | CHUNK 1 | CHUNK 2 | ... | CHUNK n |</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> | HEADER | CHUNK 1 | CHUNK 2 | ... | CHUNK n |</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;"><div> +--------+---------+---------+--- - ---+---------+</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> +--------+---------+---------+--- - ---+---------+</div></td></tr>
<tr><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: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;"></del></div></td><td colspan="2" class="diff-side-added"></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>=== Header ===</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>=== Header ===</div></td></tr>
</table>
Vincent
https://wiki.multimedia.cx/index.php?title=CMV&diff=11902&oldid=prev
Vincent at 06:47, 20 August 2009
2009-08-20T06:47:26Z
<p></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 23:47, 19 August 2009</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l18">Line 18:</td>
<td colspan="2" class="diff-lineno">Line 18:</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>== Audio ==</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>== Audio ==</div></td></tr>
<tr><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: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The first part of the file immediately starts with a RIFF header. It is a [[Microsoft Wave]] (.WAV) file. The <del style="font-weight: bold; text-decoration: none;">encoding </del>is [[IMA ADPCM]] encoded. So, one sample is 4 bits. Its a 24kHz stereo signal. This means its bit rate is 192kbps, but don't expect MP3 quality. The length (in time) is the same as that of the video. See the specifications for more details.</div></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>The first part of the file immediately starts with a RIFF header. It is a [[Microsoft Wave]] (.WAV) file. The <ins style="font-weight: bold; text-decoration: none;">audio </ins>is [[IMA ADPCM]] encoded. So, one sample is 4 bits. Its a 24kHz stereo signal. This means its bit rate is 192kbps, but don't expect MP3 quality. The length (in time) is the same as that of the video. See the specifications for more details.</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>== Video ==</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>== Video ==</div></td></tr>
</table>
Vincent
https://wiki.multimedia.cx/index.php?title=CMV&diff=11901&oldid=prev
Vincent: added catagories
2009-08-20T06:46:17Z
<p>added catagories</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 23:46, 19 August 2009</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l94">Line 94:</td>
<td colspan="2" class="diff-lineno">Line 94:</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>The last chunk may end at any frame. Remaining frames in the JPEG will be black.</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>The last chunk may end at any frame. Remaining frames in the JPEG will be black.</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;"></ins></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;"></ins></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;">[[Category:Container Formats]]</ins></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;">[[Category:Video Codecs]]</ins></div></td></tr>
</table>
Vincent
https://wiki.multimedia.cx/index.php?title=CMV&diff=11900&oldid=prev
Vincent at 06:45, 20 August 2009
2009-08-20T06:45:18Z
<p></p>
<p><b>New page</b></p><div>* Extension: cmv<br />
* Company: [[Creative]]<br />
* Based on: [http://vanbeveren.byethost13.com/docs/cmv-format.txt http://vanbeveren.byethost13.com/docs/cmv-format.txt]<br />
<br />
The CMV is a video format introduced in Creative's ZEN MX. It probably stands for 'Creative Media Video' (like WMV stands for Windows Media Video). However, there are no resources on this. It is much a guess. In this format Creative has attempted to use as little licensed codecs and complexity as possible. The compression performance of the format is terrible, about 10MB per minute. <br />
<br />
= Technical description =<br />
<br />
CMV consists of two parts, the audio, and the video.<br />
<br />
CMV generial build up:<br />
0 -> n<br />
+-------+----------------+<br />
| Audio | Video |<br />
+-------+----------------+<br />
<br />
There is no interlacing. The player hops between the audio and video every second. There is also no global format header, it immediately starts with the audio. The audio and the video parts can be concatenated 'cat' command: They are totally separated.<br />
<br />
== Audio ==<br />
The first part of the file immediately starts with a RIFF header. It is a [[Microsoft Wave]] (.WAV) file. The encoding is [[IMA ADPCM]] encoded. So, one sample is 4 bits. Its a 24kHz stereo signal. This means its bit rate is 192kbps, but don't expect MP3 quality. The length (in time) is the same as that of the video. See the specifications for more details.<br />
<br />
== Video ==<br />
Right after the WAV file, the video start. This is no complicated MPEG-4, or even MPEG-2 or WMV. Basically it's a variant of motion JPEG.<br />
<br />
The build up is like this:<br />
+--------+---------+---------+--- - ---+---------+<br />
| HEADER | CHUNK 1 | CHUNK 2 | ... | CHUNK n |<br />
+--------+---------+---------+--- - ---+---------+<br />
<br />
<br />
=== Header ===<br />
The header describes the video part of the file. All values are little-endien encoded,<br />
eg. A number (decimal) 1025 is in 3 bytes encoded as 01 04 00 (hex). The odd thing is<br />
that the whole header seems to use a 3 byte word size... to make things easy :). <br />
<br />
Offset Length Description<br />
------ ------- ---------------------------------------------------------------------------------------------<br />
0 3 Signature, "CMV"<br />
3 3 Major version, char encoded = "001"<br />
6 3 Minor version, char encoded = "000"<br />
9 3 Width of video pixels<br />
12 3 Height of video in pixels<br />
15 3 ? horizontal block size, usually 16 - used for rounding the dimensions of the video<br />
18 3 ? vertical block size, usually 16 - used for rounding the dimensions of the video<br />
21 3 chunk-size in bytes<br />
24 3 number of frames per chunk (usually equal to the FPS) <--+<br />
27 3 Number of frames in file |<br />
30 3 unknown, value = 1 | ! Might be the other way around<br />
33 3 unknown, value = 0 |<br />
36 3 FPS (usually 25) <--+<br />
39 12 0x010101 0x010101 0x010101 0x010101 unknown / reserved<br />
51 end of header <br />
<br />
All descriptions starting with a question mark are guesses.<br />
<br />
=== Chunk ===<br />
A chunk starts with 3 bytes. This is the length of the actual data. The rest of the chunk is 0 padded until is reaches the chunk-size as defined in the header.<br />
<br />
|--------- chunk size ------------------------|<br />
|------------ LEN ------------|<br />
+-----+-----------------------------+---------+--- -<br />
| LEN | DATA (JPEG) | padding | next LEN<br />
+-----+-----------------------------+---------+--- -<br />
<br />
The data is an actual *one* JPEG. Containing "number of frames per chunk" images. These images are appended below each other. So, each frame, is one image in the big jpeg. <br />
<br />
The dimensions of one image can be calculated by taking the width or height as specified in the header, and rounding it up to a multiple of the block-size. Usually this is 16. So suppose your video is 320x200, this means that the actual image size is 320x208, since 320 is a multiple of 16, but 200 is not. The remainder of the image (the 8 pixels at the bottom) are just black pixels.<br />
<br />
The dimensions of the actual JPEG are as follows:<br />
width = rounded image width<br />
height = rounded image height * frames per chunk.<br />
<br />
So, suppose the video is 320x200, the actual image is 320x208, the JPEG is <br />
320 x 208 * 25 -> 320 x 5200, looking like this:<br />
<br />
|---- 320 -------|<br />
+----------------+ -<br />
| | |<br />
| Frame 1 | 208 (of which only the first 200 lines contain video,<br />
| | | rest are black pixels)<br />
+----------------+ -<br />
| |<br />
| Frame 2 |<br />
| |<br />
+----------------+<br />
| |<br />
...<br />
| |<br />
+----------------+<br />
| |<br />
| Frame n | (usually 25)<br />
| |<br />
+----------------+<br />
<br />
The last chunk may end at any frame. Remaining frames in the JPEG will be black.</div>
Vincent