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vidstab [2015/07/12 03:18] slackermedia |
vidstab [2021/06/03 19:48] |
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| - | [[{arrowp.png|border:0;background:none;width:0;display:inline-block;position:absolute;top:0;left:0;}trelby|]] | ||
| - | [[{arrown.png|border:0;background:none;width:0;display:inline-block;position:absolute;top:0;margin-left:2.5em;}videogrep|]] | ||
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| - | ======vid.stab====== | ||
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| - | [[http://public.hronopik.de/vid.stab/features.php?lang=en|vid.stab]] is a video stabliser for ''transcode'' and ''ffmpeg''. | ||
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| - | <WRAP notice prewrap 50%> | ||
| - | <WRAP rightalign> | ||
| - | ===== Strengths [Weaknesses] ===== | ||
| - | </WRAP> | ||
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| - | **Simple** | ||
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| - | <WRAP indent> | ||
| - | Run a simple command in a shell, end up with stabilised video. | ||
| - | </WRAP> | ||
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| - | **Scriptable** | ||
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| - | <WRAP indent> | ||
| - | Commands are easily scripted; run batches overnight when nothing else is happening, or when you go to work. Run it on a server. Run it on a cluster. | ||
| - | </WRAP> | ||
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| - | <WRAP rightalign> | ||
| - | ===== Weaknesses [Strengths] ===== | ||
| - | </WRAP> | ||
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| - | **Non-Interactive** | ||
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| - | <WRAP indent> | ||
| - | This is a fully automated stabilisation process. You don't get to open a window and see how the stabilisation will affect the video, or do manual overrides in the middle of a clip. | ||
| - | </WRAP> | ||
| - | </WRAP> | ||
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| - | =====Install===== | ||
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| - | Install [[http://public.hronopik.de/vid.stab/features.php?lang=en|vid.stab]] from [[http://slackbuilds.org]]. | ||
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| - | The Slackermedia build of [[ffmpeg]] has ''vidstab'' enabled. Other builds of ''ffmpeg'' may not have this feature enabled, so if you used another ''ffmpeg'' build or built it yourself, you should double-check that it is active: | ||
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| - | <code> | ||
| - | $ ffmpeg --version | ||
| - | </code> | ||
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| - | Look in the output for the ''--enable-libvidstab'' flag. If it is set, then your installed version of ''ffmpeg'' can use ''vid.stab''. | ||
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| - | =====Usage===== | ||
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| - | Vid.stab is a two-step process; first video must be analysed, and then it can be stabilised. | ||
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| - | Fine adjustments probably need to be made depending on the severity of the shaking in the video. Read more about the different options on [[https://github.com/georgmartius/vid.stab]], and as always, practise makes perfect. Learn to identify the different "kinds" of shakes by stabilising as many clips as you can; take notes on the results, and try different techniques. | ||
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| - | First, analyse a video file, using the filter ''vidstabdetect'': | ||
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| - | <code> | ||
| - | $ ffmpeg -i foo.mp4 -vf vidstabdetect=shakiness=10:accuracy=15:result="transforms.trf" | ||
| - | </code> | ||
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| - | There is no video output from this command, but data about the video is written to the file ''transforms.trf''. | ||
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| - | Use this data to stabilise the video, applying a slight zoom so that the transforms around the edges of the screen are not visible: | ||
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| - | <code> | ||
| - | $ ffmpeg -i foo.mp4 -vf vidstabtransform=zoom=5:input="mytransforms.trf" fooStabilized.mp4 | ||
| - | </code> | ||
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| - | <WRAP tip> | ||
| - | **See Also** \\ | ||
| - | [[kdenlive|Kdenlive]] \\ | ||
| - | [[lightworks|Lightworks]] \\ | ||
| - | [[blender|Blender]] | ||
| - | </WRAP> | ||
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| - | [[{arrown.png|border:0;background:none;width:0;display:inline-block;float:right;}videogrep|]][[{arrowp.png|border:0;background:none;width:0;float:right;}trelby|]] | ||