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<div class="twikiMiddleContainer"><div class="twikiMain"><div class="twikiSearchResults"><div class="twikiSearchResultsHeader">&nbsp;<tt><b>&lt;&lt;O&gt;&gt;</b></tt>&nbsp; Difference Topic
		<b><a href="../../view/Cinelerra/PreferencesRecording">PreferencesRecording</a></b>
		(<a href="http://www.ftconsult.com/twiki/bin/view/Cinelerra/PreferencesRecording?rev=r1.2">r1.2</a> - 16&nbsp;Jan&nbsp;2004 - <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a>)</div>
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<table border="1" cellspacing="1" cellpadding="0">
<tr><th class="twikiFirstCol" bgcolor="#99CCCC"> <strong>META TOPICPARENT</strong> </th><td colspan="2" bgcolor="#FFFFCC"> Configuration </td></tr>
</table>
<h3><a name="Preferences_Recording"> </a><a name="_Preferences_Recording_"> </a> <a class="twikiLink" href="../../view/Cinelerra/PreferencesRecording">Preferences Recording</a> </h3>
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<font size="-1" class="twikiAlert" color="#FF0000">TOC: No TOC in "Cinelerra.PreferencesRecording"</font>
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<h4><a name="AUDIO_IN"> </a> AUDIO IN </h4>
<p />
These determine what happens when you record audio.
</td></tr>

</table></div><div class="twikiSearchResults"><div class="twikiSearchResultsHeader">&nbsp;<tt><b>&lt;&lt;O&gt;&gt;</b></tt>&nbsp; Difference Topic
		<b><a href="../../view/Cinelerra/PreferencesRecording">PreferencesRecording</a></b>
		(<a href="http://www.ftconsult.com/twiki/bin/view/Cinelerra/PreferencesRecording?rev=r1.1">r1.1</a> - 17&nbsp;Dec&nbsp;2003 - <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a>)</div>
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<table border="1" cellspacing="1" cellpadding="0">
<tr><th class="twikiFirstCol" bgcolor="#99CCCC"> <strong>META TOPICPARENT</strong> </th><td colspan="2" bgcolor="#FFFFCC"> Configuration </td></tr>
</table>
<h3><a name="Preferences_Recording"> </a><a name="_Preferences_Recording_"> </a> <a class="twikiLink" href="../../view/Cinelerra/PreferencesRecording">Preferences Recording</a> </h3>
<img src="../../../pub/Cinelerra/CinelerraImages/preferences_recording.png"/>
<div class="twikiToc">
<ul>
<li> <a href="#Preferences_Recording">Preferences Recording</a>
<ul>
<li> <a href="#AUDIO_IN">AUDIO IN</a>
</li>
<li> <a href="#RECORD_DRIVER">RECORD DRIVER</a>
<ul>
<li> <a href="#DEVICE_PATH">DEVICE PATH</a>
</li>
<li> <a href="#BITS">BITS</a>
</li>
<li> <a href="#CHANNELS">CHANNELS</a>
</li>
</ul>
</li>
<li> <a href="#SAMPLES_TO_WRITE_AT_A_TIME">SAMPLES TO WRITE AT A TIME</a>
</li>
<li> <a href="#SAMPLE_RATE_FOR_RECORDING">SAMPLE RATE FOR RECORDING</a>
</li>
</ul>
</li>
<li> <a href="#VIDEO_IN">VIDEO IN</a>
<ul>
<li> <a href="#RECORD_DRIVER">RECORD DRIVER</a>
</li>
<li> <a href="#FRAMES_TO_RECORD_TO_DISK_AT_A_TI">FRAMES TO RECORD TO DISK AT A TIME</a>
</li>
<li> <a href="#FRAMES_TO_BUFFER_IN_DEVICE">FRAMES TO BUFFER IN DEVICE</a>
</li>
<li> <a href="#USE_SOFTWARE_FOR_POSITIONING_INF">USE SOFTWARE FOR POSITIONING INFORMATION</a>
</li>
<li> <a href="#SYNC_DRIVES_AUTOMATICALLY">SYNC DRIVES AUTOMATICALLY</a>
</li>
<li> <a href="#SIZE_OF_CAPTURED_FRAME">SIZE OF CAPTURED FRAME</a>
</li>
<li> <a href="#FRAME_RATE_FOR_RECORDING">FRAME RATE FOR RECORDING</a>
</li>
</ul>
</li>
</ul>
</div>
<h4><a name="AUDIO_IN"> </a> AUDIO IN </h4>
<p />
These determine what happens when you record audio.
<p />
<h4><a name="RECORD_DRIVER"> </a> RECORD DRIVER </h4>
<p />
      This is used for recording audio in the Record window. It may be shared with the Record Driver for video if the audio and video are wrapped in the same stream. It takes variable parameters depending on the driver. The parameters have the same meaning as they do for playback.
<h5><a name="DEVICE_PATH"> </a> DEVICE PATH </h5>
<p />
            Usually a file in the /dev/ directory which controls the device.
<h5><a name="BITS"> </a> BITS </h5>
<p />
            The number of bits of precision Cinelerra should set the device for. This sometimes has a figuritive meaning. Some sound drivers need to be set to 32 bits to perform 24 bit recording and won't record anything when set to 24 bits. Some sound drivers need to be set to 24 bits for 24 bit recording.
<h5><a name="CHANNELS"> </a> CHANNELS </h5>
<p />
      The number of channels Cinelerra should set the device for. Regardless of the number of channels in the record operation, the number of channels set here will be read from the device. When this is set to 2 and the record operation has 1 channel you'll record the left speaker and not a mix of the left and right speakers as expected for a monaural project. When this is set to 1 and the project has 2 channels you'll record the left and right channels mixed into the left speaker and not 1 channel spead across two speakers.
<p />
<h4><a name="SAMPLES_TO_WRITE_AT_A_TIME"> </a> SAMPLES TO WRITE AT A TIME </h4>
<p />
      Audio is first read in small fragments from the device. Many small fragments are combined into a large fragment before writing to disk. The disk writing process is done in a different thread. The value here determines how large the combination of fragments is for each disk write.
<h4><a name="SAMPLE_RATE_FOR_RECORDING"> </a> SAMPLE RATE FOR RECORDING </h4>
<p />
Regardless of what the project settings are. This is the sample rate used for recording. This should be the highest the audio device supports.
<p />
<h3><a name="VIDEO_IN"> </a> VIDEO IN </h3>
<p />
These determine what happens when you record video.
<p />
<h4><a name="RECORD_DRIVER"> </a> RECORD DRIVER </h4>
<p />
      This is used for recording video in the Record window. It may be shared with the Record Driver for audio if the audio and video are wrapped in the same stream. It takes variable parameters depending on the driver. The parameters have the same meaning as they do for playback.
<h4><a name="FRAMES_TO_RECORD_TO_DISK_AT_A_TI"> </a> FRAMES TO RECORD TO DISK AT A TIME </h4>
<p />
      Frames are recorded in a pipeline. First frames are buffered in the device. Then they're read into a larger buffer for writing to disk. The disk writing is done in a different thread as the device reading. For certain codecs the disk writing uses multiple processors. This value determines how many frames are written to disk at a time.
<h4><a name="FRAMES_TO_BUFFER_IN_DEVICE"> </a> FRAMES TO BUFFER IN DEVICE </h4>
<p />
      The number of frames to store in the device before reading. This determines how much latency there can be in the system before frames are dropped.
<h4><a name="USE_SOFTWARE_FOR_POSITIONING_INF"> </a> USE SOFTWARE FOR POSITIONING INFORMATION </h4>
<p />
      Video uses audio for
<p />
      synchronization but most soundcards don't give accurate position information. This calculates an estimation of audio position in software instead of the hardware for synchronization.
<h4><a name="SYNC_DRIVES_AUTOMATICALLY"> </a> SYNC DRIVES AUTOMATICALLY </h4>
<p />
      For high bitrate recording the drives may be fast enough to store the data but Linux may wait several minutes and stall as it writes several minutes of data at a time. This forces Linux to flush its buffers every second instead of every few minutes and produce slightly better realtime behavior.
<h4><a name="SIZE_OF_CAPTURED_FRAME"> </a> SIZE OF CAPTURED FRAME </h4>
<p />
      This is the size of the frames recorded. It is independant of the project frame size because most video devices only record a fixed frame size. If the frame size given here isn't supported by the device it might crash Cinelerra.
<h4><a name="FRAME_RATE_FOR_RECORDING"> </a> FRAME RATE FOR RECORDING </h4>
<p />
The frame rate recorded is different from the project settings. This sets the recorded frame rate.
<p />
-- <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a> - 17 Dec 2003
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</table></div><div class="twikiTopicAction"><a href="../../view/Cinelerra/PreferencesRecording">View topic</a>
 <span class="twikiSeparator">|</span> <a href="PreferencesRecording">Diffs</a>  | <a href="http://www.ftconsult.com/twiki/bin/view/Cinelerra/PreferencesRecording?rev=1.2">r1.2</a> | &gt; | <a href="http://www.ftconsult.com/twiki/bin/view/Cinelerra/PreferencesRecording?rev=1.1">r1.1</a>
 <span class="twikiSeparator">|</span> <a href="http://www.ftconsult.com/twiki/bin/oops/Cinelerra/PreferencesRecording?template=oopsmore&param1=1.2&param2=1.2">More</a>
</div><div class="twikiTopicInfo"><span class="twikiRevInfo twikiGrayText">Revision r1.1 - 17 Dec 2003 - 05:32 - <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a><br />
Revision r1.2 - 16 Jan 2004 - 21:26 - <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a></span></div>
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