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This is an automatically generated e-mail. To reply, visit:
<a href="http://git.reviewboard.kde.org/r/114170/">http://git.reviewboard.kde.org/r/114170/</a>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">I implemented most of the things pointed out below locally and uploaded a new patch to https://nienhueser.de/marble/marble-movie-record-2.diff
Feel free to work with that.</pre>
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<a href="http://git.reviewboard.kde.org/r/114170/diff/3/?file=221889#file221889line37" style="color: black; font-weight: bold; text-decoration: underline;">src/lib/marble/MovieCapture.h</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="kt">void</span> <span class="nf">recordFrame</span><span class="p">();</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">private, unless you plan to use it externally later (for data-driven recording)</pre>
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<a href="http://git.reviewboard.kde.org/r/114170/diff/3/?file=221889#file221889line38" style="color: black; font-weight: bold; text-decoration: underline;">src/lib/marble/MovieCapture.h</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="kt">void</span> <span class="nf">processWrittenMovie</span><span class="p">(</span><span class="kt">int</span> <span class="n">exitCode</span><span class="p">);</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">private</pre>
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<a href="http://git.reviewboard.kde.org/r/114170/diff/3/?file=221890#file221890line27" style="color: black; font-weight: bold; text-decoration: underline;">src/lib/marble/MovieCapture.cpp</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">m_recordingThread</span><span class="p">(</span><span class="k">new</span> <span class="n">QThread</span><span class="p">(</span><span class="k">this</span><span class="p">))</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">QProcess::start() runs asynchronously and is the only thing executed by the thread. Therefore the thread has no benefit here and the process can be called from MovieCapture directly. It might be beneficial to use threads when executing the mapScreenShot() method from there as well. I'm not sure if that is well-defined though.</pre>
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<a href="http://git.reviewboard.kde.org/r/114170/diff/3/?file=221890#file221890line29" style="color: black; font-weight: bold; text-decoration: underline;">src/lib/marble/MovieCapture.cpp</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">m_fpsTimer</span><span class="p">.</span><span class="n">setInterval</span><span class="p">(</span><span class="mi">1000</span><span class="p">);</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">A static time driven frame rate is usually a bad guess. Either the value is too high and you'll queue up image requests, or too low and you get worse results than the system would support. A better approach is to start recording the next frame a slight amount after the current one has been processed. It's very easy to implement as well: Just call something like
QTimer::singleShot( 10, this, SLOT(recordFrame()) );
in recordFrame(), and use a boolean flag to stop recording.
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<a href="http://git.reviewboard.kde.org/r/114170/diff/3/?file=221890#file221890line42" style="color: black; font-weight: bold; text-decoration: underline;">src/lib/marble/MovieCapture.cpp</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">dir</span><span class="p">.</span><span class="n">mkdir</span><span class="p">(</span><span class="s">"movie"</span><span class="p">);</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">the directory name should somehow hint that it is related to Marble. e.g. "Marble-Screencasts"</pre>
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<a href="http://git.reviewboard.kde.org/r/114170/diff/3/?file=221890#file221890line43" style="color: black; font-weight: bold; text-decoration: underline;">src/lib/marble/MovieCapture.cpp</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">return</span> <span class="n">dir</span><span class="p">;</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">dir.cd("movie")
The patch records to ~/ currently.
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<a href="http://git.reviewboard.kde.org/r/114170/diff/3/?file=221890#file221890line65" style="color: black; font-weight: bold; text-decoration: underline;">src/lib/marble/MovieCapture.cpp</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="n">avconv</span><span class="p">.</span><span class="n">exitCode</span><span class="p">()</span> <span class="o">==</span> <span class="mi">1</span><span class="p">)</span> <span class="p">{</span> <span class="c1">// avconv exits with 1 when it's here</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Let's execute 'avconv -version' instead. It returns with code 0.</pre>
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<a href="http://git.reviewboard.kde.org/r/114170/diff/3/?file=221890#file221890line84" style="color: black; font-weight: bold; text-decoration: underline;">src/lib/marble/MovieCapture.cpp</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">QString</span> <span class="n">output</span> <span class="o">=</span> <span class="n">movieDir</span><span class="p">().</span><span class="n">absoluteFilePath</span><span class="p">(</span><span class="s">"movie.mpeg"</span><span class="p">);</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">- Output should either be a unique filename, or -y must be passed to avconv to overwrite output files without asking.
- Set the output frame rate since it will differ from the default one (around 25)
- Set the output bit rate to avoid getting really bad quality
- Use a container/codec like webm with a much better compression/quality ratio
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<a href="http://git.reviewboard.kde.org/r/114170/diff/3/?file=221890#file221890line85" style="color: black; font-weight: bold; text-decoration: underline;">src/lib/marble/MovieCapture.cpp</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">argv</span> <span class="o"><<</span> <span class="n">QString</span><span class="p">(</span><span class="s">"-i %1 %2"</span><span class="p">).</span><span class="n">arg</span><span class="p">(</span><span class="n">input</span><span class="p">,</span> <span class="n">output</span><span class="p">);</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Each argument must be one item of the string list, not all arguments separated by space as one string</pre>
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<a href="http://git.reviewboard.kde.org/r/114170/diff/3/?file=221890#file221890line89" style="color: black; font-weight: bold; text-decoration: underline;">src/lib/marble/MovieCapture.cpp</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">avconv</span><span class="o">-></span><span class="n">start</span><span class="p">(</span><span class="s">"avconv"</span><span class="p">,</span> <span class="n">argv</span><span class="p">);</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">doesn't work, "cannot create children for object created in different thread". I'd avoid using a thread as noted above</pre>
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<a href="http://git.reviewboard.kde.org/r/114170/diff/3/?file=221890#file221890line93" style="color: black; font-weight: bold; text-decoration: underline;">src/lib/marble/MovieCapture.cpp</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="kt">void</span> <span class="n">MovieCapture</span><span class="o">::</span><span class="n">processWrittenMovie</span><span class="p">(</span><span class="kt">int</span> <span class="n">exitCode</span><span class="p">)</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Should also inform the user about the location of the movie and clean up single images</pre>
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<p>- Dennis Nienhüser</p>
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<p>On November 30th, 2013, 2:37 p.m. UTC, Illya Kovalevskyy wrote:</p>
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<div>Review request for Marble, Utku Aydın, Dennis Nienhüser, and Torsten Rahn.</div>
<div>By Illya Kovalevskyy.</div>
<p style="color: grey;"><i>Updated Nov. 30, 2013, 2:37 p.m.</i></p>
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<b style="color: #575012; font-size: 10pt;">Repository: </b>
marble
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">According to Google Code-In 2013 task (http://www.google-melange.com/gci/task/view/google/gci2013/5805119807422464):
Basic template + implementation of timer-based fps marblewidget caster. Current impl saves 1 fps to home directory in BMP format (as separate files).</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">UI/UX, unit-tests</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>src/apps/marble-qt/QtMainWindow.h <span style="color: grey">(80ae250)</span></li>
<li>src/apps/marble-qt/QtMainWindow.cpp <span style="color: grey">(a713272)</span></li>
<li>src/apps/marble-ui/icons/16x16/tool-animator.png <span style="color: grey">(PRE-CREATION)</span></li>
<li>src/apps/marble-ui/marble.qrc <span style="color: grey">(5ff3a32)</span></li>
<li>src/lib/marble/CMakeLists.txt <span style="color: grey">(8f2c6eb)</span></li>
<li>src/lib/marble/MovieCapture.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>src/lib/marble/MovieCapture.cpp <span style="color: grey">(PRE-CREATION)</span></li>
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<p><a href="http://git.reviewboard.kde.org/r/114170/diff/" style="margin-left: 3em;">View Diff</a></p>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">File Attachments </h1>
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<li><a href="http://git.reviewboard.kde.org/media/uploaded/files/2013/11/27/743aed4b-bee3-4fdc-b48c-283ae78ee400__menu-entry.png">UI/UX</a></li>
<li><a href="http://git.reviewboard.kde.org/media/uploaded/files/2013/11/27/ddd49c4e-43cb-4608-ab08-5080bc628002__formats.png">Frame files</a></li>
</ul>
</td>
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