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| <div class="refentry"> |
| <a name="gst-plugins-ugly-plugins-lamemp3enc"></a><div class="titlepage"></div> |
| <div class="refnamediv"><table width="100%"><tr> |
| <td valign="top"> |
| <h2><span class="refentrytitle"><a name="gst-plugins-ugly-plugins-lamemp3enc.top_of_page"></a>lamemp3enc</span></h2> |
| <p>lamemp3enc</p> |
| </td> |
| <td class="gallery_image" valign="top" align="right"></td> |
| </tr></table></div> |
| <div class="refsect1"> |
| <a name="gst-plugins-ugly-plugins-lamemp3enc.properties"></a><h2>Properties</h2> |
| <div class="informaltable"><table class="informaltable" border="0"> |
| <colgroup> |
| <col width="150px" class="properties_type"> |
| <col width="300px" class="properties_name"> |
| <col width="200px" class="properties_flags"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="property_type"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="type">gint</span></a></td> |
| <td class="property_name"><a class="link" href="gst-plugins-ugly-plugins-lamemp3enc.html#GstLameMP3Enc--bitrate" title="The “bitrate” property">bitrate</a></td> |
| <td class="property_flags">Read / Write / Construct</td> |
| </tr> |
| <tr> |
| <td class="property_type"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td> |
| <td class="property_name"><a class="link" href="gst-plugins-ugly-plugins-lamemp3enc.html#GstLameMP3Enc--cbr" title="The “cbr” property">cbr</a></td> |
| <td class="property_flags">Read / Write / Construct</td> |
| </tr> |
| <tr> |
| <td class="property_type"><span class="type">GstLameMP3EncEncodingEngineQuality</span></td> |
| <td class="property_name"><a class="link" href="gst-plugins-ugly-plugins-lamemp3enc.html#GstLameMP3Enc--encoding-engine-quality" title="The “encoding-engine-quality” property">encoding-engine-quality</a></td> |
| <td class="property_flags">Read / Write / Construct</td> |
| </tr> |
| <tr> |
| <td class="property_type"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td> |
| <td class="property_name"><a class="link" href="gst-plugins-ugly-plugins-lamemp3enc.html#GstLameMP3Enc--mono" title="The “mono” property">mono</a></td> |
| <td class="property_flags">Read / Write / Construct</td> |
| </tr> |
| <tr> |
| <td class="property_type"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gfloat"><span class="type">gfloat</span></a></td> |
| <td class="property_name"><a class="link" href="gst-plugins-ugly-plugins-lamemp3enc.html#GstLameMP3Enc--quality" title="The “quality” property">quality</a></td> |
| <td class="property_flags">Read / Write / Construct</td> |
| </tr> |
| <tr> |
| <td class="property_type"><span class="type">GstLameMP3EncTarget</span></td> |
| <td class="property_name"><a class="link" href="gst-plugins-ugly-plugins-lamemp3enc.html#GstLameMP3Enc--target" title="The “target” property">target</a></td> |
| <td class="property_flags">Read / Write / Construct</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <a name="GstLameMP3Enc"></a><div class="refsect1"> |
| <a name="gst-plugins-ugly-plugins-lamemp3enc.other"></a><h2>Types and Values</h2> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="name"> |
| <col class="description"> |
| </colgroup> |
| <tbody><tr> |
| <td class="datatype_keyword">struct</td> |
| <td class="function_name"><a class="link" href="gst-plugins-ugly-plugins-lamemp3enc.html#GstLameMP3Enc-struct" title="struct GstLameMP3Enc">GstLameMP3Enc</a></td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-ugly-plugins-lamemp3enc.object-hierarchy"></a><h2>Object Hierarchy</h2> |
| <pre class="screen"> <a href="/usr/share/gtk-doc/html/gobjectgobject-The-Base-Object-Type.html#GObject-struct">GObject</a> |
| <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gobjectgobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a> |
| <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstObject.html#GstObject-struct">GstObject</a> |
| <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstElement.html#GstElement-struct">GstElement</a> |
| <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gst-plugins-base-libs-1.0gst-plugins-base-libs-gstaudioencoder.html#GstAudioEncoder-struct">GstAudioEncoder</a> |
| <span class="lineart">╰──</span> GstLameMP3Enc |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-ugly-plugins-lamemp3enc.implemented-interfaces"></a><h2>Implemented Interfaces</h2> |
| <p> |
| GstLameMP3Enc implements |
| <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstPreset.html#GstPreset-struct">GstPreset</a>.</p> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-ugly-plugins-lamemp3enc.description"></a><h2>Description</h2> |
| <p>This element encodes raw integer audio into an MPEG-1 layer 3 (MP3) stream. |
| Note that <a class="ulink" href="http://en.wikipedia.org/wiki/MP3" target="_top">MP3</a> is not |
| a free format, there are licensing and patent issues to take into |
| consideration. See <a class="ulink" href="http://www.vorbis.com/" target="_top">Ogg/Vorbis</a> |
| for a royalty free (and often higher quality) alternative.</p> |
| <div class="refsect2"> |
| <a name="id-1.2.7.8.3"></a><h3>Output sample rate</h3> |
| If no fixed output sample rate is negotiated on the element's src pad, |
| the element will choose an optimal sample rate to resample to internally. |
| For example, a 16-bit 44.1 KHz mono audio stream encoded at 48 kbit will |
| get resampled to 32 KHz. Use filter caps on the src pad to force a |
| particular sample rate. |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="id-1.2.7.8.4"></a><h3>Example pipelines</h3> |
| <div class="informalexample"> |
| <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> |
| <tbody> |
| <tr> |
| <td class="listing_lines" align="right"><pre>1</pre></td> |
| <td class="listing_code"><pre class="programlisting">gst<span class="gtkdoc opt">-</span>launch<span class="gtkdoc opt">-</span><span class="number">1.0</span> <span class="gtkdoc opt">-</span>v audiotestsrc wave<span class="gtkdoc opt">=</span>sine num<span class="gtkdoc opt">-</span>buffers<span class="gtkdoc opt">=</span><span class="number">100</span> <span class="gtkdoc opt">!</span> audioconvert <span class="gtkdoc opt">!</span> lamemp3enc <span class="gtkdoc opt">!</span> filesink location<span class="gtkdoc opt">=</span>sine<span class="gtkdoc opt">.</span>mp3</pre></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| Encode a test sine signal to MP3. |
| <div class="informalexample"> |
| <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> |
| <tbody> |
| <tr> |
| <td class="listing_lines" align="right"><pre>1</pre></td> |
| <td class="listing_code"><pre class="programlisting">gst<span class="gtkdoc opt">-</span>launch<span class="gtkdoc opt">-</span><span class="number">1.0</span> <span class="gtkdoc opt">-</span>v autoaudiosrc <span class="gtkdoc opt">!</span> audioconvert <span class="gtkdoc opt">!</span> lamemp3enc target<span class="gtkdoc opt">=</span>bitrate bitrate<span class="gtkdoc opt">=</span><span class="number">192</span> <span class="gtkdoc opt">!</span> filesink location<span class="gtkdoc opt">=</span>alsasrc<span class="gtkdoc opt">.</span>mp3</pre></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| Record from a sound card using ALSA and encode to MP3 with an average bitrate of 192kbps |
| <div class="informalexample"> |
| <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> |
| <tbody> |
| <tr> |
| <td class="listing_lines" align="right"><pre>1</pre></td> |
| <td class="listing_code"><pre class="programlisting">gst<span class="gtkdoc opt">-</span>launch<span class="gtkdoc opt">-</span><span class="number">1.0</span> <span class="gtkdoc opt">-</span>v filesrc location<span class="gtkdoc opt">=</span>music<span class="gtkdoc opt">.</span>wav <span class="gtkdoc opt">!</span> decodebin <span class="gtkdoc opt">!</span> audioconvert <span class="gtkdoc opt">!</span> audioresample <span class="gtkdoc opt">!</span> lamemp3enc target<span class="gtkdoc opt">=</span>quality quality<span class="gtkdoc opt">=</span><span class="number">0</span> <span class="gtkdoc opt">!</span> id3v2mux <span class="gtkdoc opt">!</span> filesink location<span class="gtkdoc opt">=</span>music<span class="gtkdoc opt">.</span>mp3</pre></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| Transcode from a .wav file to MP3 (the id3v2mux element is optional) with best VBR quality |
| <div class="informalexample"> |
| <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> |
| <tbody> |
| <tr> |
| <td class="listing_lines" align="right"><pre>1</pre></td> |
| <td class="listing_code"><pre class="programlisting">gst<span class="gtkdoc opt">-</span>launch<span class="gtkdoc opt">-</span><span class="number">1.0</span> <span class="gtkdoc opt">-</span>v cdda<span class="gtkdoc opt">:</span><span class="gtkdoc slc">//5 ! audioconvert ! lamemp3enc target=bitrate cbr=true bitrate=192 ! filesink location=track5.mp3</span></pre></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| Encode Audio CD track 5 to MP3 with a constant bitrate of 192kbps |
| <div class="informalexample"> |
| <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> |
| <tbody> |
| <tr> |
| <td class="listing_lines" align="right"><pre>1</pre></td> |
| <td class="listing_code"><pre class="programlisting">gst<span class="gtkdoc opt">-</span>launch<span class="gtkdoc opt">-</span><span class="number">1.0</span> <span class="gtkdoc opt">-</span>v audiotestsrc num<span class="gtkdoc opt">-</span>buffers<span class="gtkdoc opt">=</span><span class="number">10</span> <span class="gtkdoc opt">!</span> audio<span class="gtkdoc opt">/</span>x<span class="gtkdoc opt">-</span>raw<span class="gtkdoc opt">,</span>rate<span class="gtkdoc opt">=</span><span class="number">44100</span><span class="gtkdoc opt">,</span>channels<span class="gtkdoc opt">=</span><span class="number">1</span> <span class="gtkdoc opt">!</span> lamemp3enc target<span class="gtkdoc opt">=</span>bitrate cbr<span class="gtkdoc opt">=</span><span class="keyword">true</span> bitrate<span class="gtkdoc opt">=</span><span class="number">48</span> <span class="gtkdoc opt">!</span> filesink location<span class="gtkdoc opt">=</span>test<span class="gtkdoc opt">.</span>mp3</pre></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| Encode to a fixed sample rate |
| </div> |
| <div class="refsynopsisdiv"> |
| <h2>Synopsis</h2> |
| <div class="refsect2"> |
| <a name="id-1.2.7.8.5.1"></a><h3>Element Information</h3> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term">plugin</span></p></td> |
| <td> |
| <a class="link" href="gst-plugins-ugly-plugins-plugin-lame.html#plugin-lame">lame</a> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term">author</span></p></td> |
| <td>Sebastian Dröge <sebastian.droege@collabora.co.uk></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">class</span></p></td> |
| <td>Codec/Encoder/Audio</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="id-1.2.7.8.5.2"></a><h3>Element Pads</h3> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term">name</span></p></td> |
| <td>sink</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">direction</span></p></td> |
| <td>sink</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">presence</span></p></td> |
| <td>always</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">details</span></p></td> |
| <td>audio/x-raw, format=(string)S16LE, layout=(string)interleaved, rate=(int){ 8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000 }, channels=(int)1</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"></span></p></td> |
| <td> audio/x-raw, format=(string)S16LE, layout=(string)interleaved, rate=(int){ 8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000 }, channels=(int)2, channel-mask=(bitmask)0x0000000000000003</td> |
| </tr> |
| </tbody> |
| </table></div> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term">name</span></p></td> |
| <td>src</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">direction</span></p></td> |
| <td>source</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">presence</span></p></td> |
| <td>always</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">details</span></p></td> |
| <td>audio/mpeg, mpegversion=(int)1, layer=(int)3, rate=(int){ 8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000 }, channels=(int)[ 1, 2 ]</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-ugly-plugins-lamemp3enc.functions_details"></a><h2>Functions</h2> |
| <p></p> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-ugly-plugins-lamemp3enc.other_details"></a><h2>Types and Values</h2> |
| <div class="refsect2"> |
| <a name="GstLameMP3Enc-struct"></a><h3>struct GstLameMP3Enc</h3> |
| <pre class="programlisting">struct GstLameMP3Enc;</pre> |
| <p>Opaque data structure.</p> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-ugly-plugins-lamemp3enc.property-details"></a><h2>Property Details</h2> |
| <div class="refsect2"> |
| <a name="GstLameMP3Enc--bitrate"></a><h3>The <code class="literal">“bitrate”</code> property</h3> |
| <pre class="programlisting"> “bitrate” <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="type">gint</span></a></pre> |
| <p>Bitrate in kbit/sec (Only valid if target is bitrate, for CBR one of 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256 or 320).</p> |
| <p>Flags: Read / Write / Construct</p> |
| <p>Allowed values: [8,320]</p> |
| <p>Default value: 128</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstLameMP3Enc--cbr"></a><h3>The <code class="literal">“cbr”</code> property</h3> |
| <pre class="programlisting"> “cbr” <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre> |
| <p>Enforce constant bitrate encoding (Only valid if target is bitrate).</p> |
| <p>Flags: Read / Write / Construct</p> |
| <p>Default value: FALSE</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstLameMP3Enc--encoding-engine-quality"></a><h3>The <code class="literal">“encoding-engine-quality”</code> property</h3> |
| <pre class="programlisting"> “encoding-engine-quality” <span class="type">GstLameMP3EncEncodingEngineQuality</span></pre> |
| <p>Quality/speed of the encoding engine, this does not affect the bitrate!.</p> |
| <p>Flags: Read / Write / Construct</p> |
| <p>Default value: Standard</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstLameMP3Enc--mono"></a><h3>The <code class="literal">“mono”</code> property</h3> |
| <pre class="programlisting"> “mono” <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre> |
| <p>Enforce mono encoding.</p> |
| <p>Flags: Read / Write / Construct</p> |
| <p>Default value: FALSE</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstLameMP3Enc--quality"></a><h3>The <code class="literal">“quality”</code> property</h3> |
| <pre class="programlisting"> “quality” <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gfloat"><span class="type">gfloat</span></a></pre> |
| <p>VBR Quality from 0 to 10, 0 being the best (Only valid if target is quality).</p> |
| <p>Flags: Read / Write / Construct</p> |
| <p>Allowed values: [0,9.999]</p> |
| <p>Default value: 4</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstLameMP3Enc--target"></a><h3>The <code class="literal">“target”</code> property</h3> |
| <pre class="programlisting"> “target” <span class="type">GstLameMP3EncTarget</span></pre> |
| <p>Optimize for quality or bitrate.</p> |
| <p>Flags: Read / Write / Construct</p> |
| <p>Default value: Quality</p> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-ugly-plugins-lamemp3enc.see-also"></a><h2>See Also</h2> |
| <p>lame, mad, vorbisenc</p> |
| </div> |
| </div> |
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