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<title>MPEG Tags</title>
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<h2 class=top>MPEG Tags</h2>
<p>
The MPEG format doesn't specify any file-level meta information. In lieu of
this, information is extracted from the first audio and video frame headers
in the file.
</p>
<h2><a name='Audio'>MPEG Audio Tags</a></h2>
<blockquote>
<table class=frame><tr><td>
<table class=inner cellspacing=1>
<tr class=h><th>Tag ID</th><th>Tag Name</th>
<th>Writable</th><th>Values / <span class=n>Notes</span></th></tr>
<tr>
<td>'Bit11-12'</td>
<td>MPEGAudioVersion</td>
<td class=c>N</td>
<td><span class=s>0 = 2.5
<br>2 = 2
<br>3 = 1</span></td></tr>
<tr class=b>
<td>'Bit13-14'</td>
<td>AudioLayer</td>
<td class=c>N</td>
<td><span class=s>1 = 3
<br>2 = 2
<br>3 = 1</span></td></tr>
<tr>
<td>'Bit16-19'</td>
<td>AudioBitrate</td>
<td class=c>N</td>
<td><span class=s><span class=n>(version 1, layer 1)</span>
<br><span class=n>(version 1, layer 2)</span>
<br><span class=n>(version 1, layer 3)</span>
<br><span class=n>(version 2 or 2.5, layer 1)</span>
<br><span class=n>(version 2 or 2.5, layer 2 or 3)</span></span></td></tr>
<tr class=b>
<td>'Bit20-21'</td>
<td>SampleRate</td>
<td class=c>N</td>
<td><span class=s><span class=n>(version 1)</span>
<br>0 = 44100
<br>1 = 48000
<br>2 = 32000
<br><span class=n>(version 2)</span>
<br>0 = 22050
<br>1 = 24000
<br>2 = 16000
<br><span class=n>(version 2.5)</span>
<br>0 = 11025
<br>1 = 12000
<br>2 = 8000</span></td></tr>
<tr>
<td>'Bit24-25'</td>
<td>ChannelMode</td>
<td class=c>N</td>
<td><span class=s>0 = Stereo
<br>1 = Joint Stereo
<br>2 = Dual Channel
<br>3 = Single Channel</span></td></tr>
<tr class=b>
<td>'Bit26'</td>
<td>MSStereo</td>
<td class=c>N</td>
<td><span class=s><span class=n>(layer 3)</span>
<br>0 = Off
<br>1 = On</span></td></tr>
<tr>
<td>'Bit26-27'</td>
<td>ModeExtension</td>
<td class=c>N</td>
<td><span class=s><span class=n>(layer 1 or 2)</span>
<br>0 = Bands 4-31
<br>1 = Bands 8-31
<br>2 = Bands 12-31
<br>3 = Bands 16-31</span></td></tr>
<tr class=b>
<td>'Bit27'</td>
<td>IntensityStereo</td>
<td class=c>N</td>
<td><span class=s><span class=n>(layer 3)</span>
<br>0 = Off
<br>1 = On</span></td></tr>
<tr>
<td>'Bit28'</td>
<td>CopyrightFlag</td>
<td class=c>N</td>
<td><span class=s>0 = False
<br>1 = True</span></td></tr>
<tr class=b>
<td>'Bit29'</td>
<td>OriginalMedia</td>
<td class=c>N</td>
<td><span class=s>0 = False
<br>1 = True</span></td></tr>
<tr>
<td>'Bit30-31'</td>
<td>Emphasis</td>
<td class=c>N</td>
<td><span class=s>0 = None
<br>1 = 50/15 ms
<br>2 = reserved
<br>3 = CCIT J.17</span></td></tr>
</table></td></tr></table></blockquote>
<h2><a name='Video'>MPEG Video Tags</a></h2>
<blockquote>
<table class=frame><tr><td>
<table class=inner cellspacing=1>
<tr class=h><th>Tag ID</th><th>Tag Name</th>
<th>Writable</th><th>Values / <span class=n>Notes</span></th></tr>
<tr>
<td>'Bit00-11'</td>
<td>ImageWidth</td>
<td class=c>N</td>
<td> </td></tr>
<tr class=b>
<td>'Bit12-23'</td>
<td>ImageHeight</td>
<td class=c>N</td>
<td> </td></tr>
<tr>
<td>'Bit24-27'</td>
<td>AspectRatio</td>
<td class=c>N</td>
<td><table class=cols><tr>
<td>0.6735 = 0.6735
<br>0.7031 = 16:9, 625 line, PAL
<br>0.7615 = 0.7615
<br>0.8055 = 0.8055
<br>0.8437 = 16:9, 525 line, NTSC
<br>0.8935 = 0.8935
<br>0.9157 = 4:3, 625 line, PAL, CCIR601
<br>0.9815 = 0.9815
<br>1 = 1:1
<br>1.095 = 4:3, 525 line, NTSC, CCIR601
<br>1.0255 = 1.0255
<br>1.0695 = 1.0695
<br>1.1575 = 1.1575
<br>1.2015 = 1.2015</td></tr></table>
</td></tr>
<tr class=b>
<td>'Bit28-31'</td>
<td>FrameRate</td>
<td class=c>N</td>
<td> </td></tr>
<tr>
<td>'Bit32-49'</td>
<td>VideoBitrate</td>
<td class=c>N</td>
<td> </td></tr>
</table></td></tr></table></blockquote>
<h2><a name='Xing'>MPEG Xing Tags</a></h2>
<p>These tags are extracted from the Xing/Info frame.</p>
<blockquote>
<table class=frame><tr><td>
<table class=inner cellspacing=1>
<tr class=h><th>Tag Name</th>
<th>Writable</th><th>Values / <span class=n>Notes</span></th></tr>
<tr>
<td>Encoder</td>
<td class=c>N</td>
<td> </td></tr>
<tr class=b>
<td>LameHeader</td>
<td class=c>-</td>
<td>--> <a href='MPEG.html#Lame'>MPEG Lame Tags</a></td></tr>
<tr>
<td>LameQuality</td>
<td class=c>N</td>
<td> </td></tr>
<tr class=b>
<td>LameVBRQuality</td>
<td class=c>N</td>
<td> </td></tr>
<tr>
<td>VBRBytes</td>
<td class=c>N</td>
<td> </td></tr>
<tr class=b>
<td>VBRFrames</td>
<td class=c>N</td>
<td> </td></tr>
<tr>
<td>VBRScale</td>
<td class=c>N</td>
<td> </td></tr>
</table></td></tr></table></blockquote>
<h2><a name='Lame'>MPEG Lame Tags</a></h2>
<p>Tags extracted from Lame 3.90 or later header.</p>
<blockquote>
<table class=frame><tr><td>
<table class=inner cellspacing=1>
<tr class=h><th>Index1</th><th>Tag Name</th>
<th>Writable</th><th>Values / <span class=n>Notes</span></th></tr>
<tr>
<td class=r title='9 = 0x9'>9</td>
<td>LameMethod</td>
<td class=c>N</td>
<td><span class=s>[Mask 0x0f]</span><table class=cols><tr>
<td>0x1 = CBR
<br>0x2 = ABR
<br>0x3 = VBR (old/rh)
<br>0x4 = VBR (new/mtrh)</td><td> </td>
<td>0x5 = VBR (old/rh)
<br>0x6 = VBR
<br>0x8 = CBR (2-pass)
<br>0x9 = ABR (2-pass)</td></tr></table>
</td></tr>
<tr class=b>
<td class=r title='10 = 0xa'>10</td>
<td>LameLowPassFilter</td>
<td class=c>N</td>
<td> </td></tr>
<tr>
<td class=r title='20 = 0x14'>20</td>
<td>LameBitrate</td>
<td class=c>N</td>
<td> </td></tr>
<tr class=b>
<td class=r title='24 = 0x18'>24</td>
<td>LameStereoMode</td>
<td class=c>N</td>
<td><span class=s>[Mask 0x1c]</span><table class=cols><tr>
<td>0x0 = Mono
<br>0x1 = Stereo
<br>0x2 = Dual Channels
<br>0x3 = Joint Stereo
<br>0x4 = Forced Joint Stereo
<br>0x6 = Auto
<br>0x7 = Intensity Stereo</td></tr></table>
</td></tr>
</table></td></tr></table></blockquote>
<hr>
(This document generated automatically by Image::ExifTool::BuildTagLookup)
<br><i>Last revised Aug 21, 2011</i>
<p class=lf><a href='index.html'><-- ExifTool Tag Names</a></p>
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