StackOverflow2013

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POQt C++ video libraries
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copied!<p>I'm looking for a video library for Qt 4 (C++/Windows) that has:</p> <p><strong>1) Basic video playback functionality</strong></p> <p>It should play all the common video formats such as DVD VOB and MP4/MKV/AVI (h264, xvid, divx). It should also be able to deinterlace the video automatically and display it in Display Aspect Ratio.</p> <p><strong>2) Cropping</strong></p> <p>It should have some basic functionality to remove black bars (user supplied arguments).</p> <p><strong>3) Snapshots</strong></p> <p>It should have functionality to take snapshots in memory.</p> <p><strong>4) Frame-by-frame seeking</strong></p> <p>It should have some basic functionality to do frame-by-frame seeking, e.g. prevFrame(), nextFrame(), jumpTo(frame) and getNumFrames().</p> <hr> <p>I have tried the following and from what I could find the functionality they support:</p> <p><strong>Qt Phonon:</strong></p> <ol> <li>Yes. Plays all the needed formats and displays them correctly. </li> <li>No. </li> <li>No. Not implemented (returns empty image). </li> <li>No.</li> </ol> <p><strong>QtFFmpegWrapper:</strong></p> <ol> <li>Partial. Does not deinterlace DVD VOBs. Does not display DVD VOBs in DAR. </li> <li>No. </li> <li>Yes. </li> <li>Partial. Broken for MKV (h264). </li> </ol> <p><strong>Qt VLC:</strong></p> <ol> <li>Yes. Plays all the needed formats and displays them correctly. </li> <li>Yes. Have not tried if it works though. </li> <li>Partial. Only to disk. <strong>edit:</strong> QPixmap::grabWindow(player->videoWidget()->winId()) works. </li> <li>No. Only by milliseconds.</li> </ol> <p>Now I'm looking at QVision, which seems to have all of those features except for cropping. Maybe implementing cropping isn't that difficult. But I'm wondering if there's any other libraries I should look into? Or perhaps I missed something and they're possible with one of these libraries. Thanks.</p>

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