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• Remove random background from video using ffmpeg or Python

  20 avril 2024, par Raheel Shahzad

  I want to remove background from a person's video using ffmpeg or Python. If I record a video at any place, detect the person in the video and then remove anything except that person. Not asking for green or single color background as that can be done through chromakey and I am not looking for that.

  



  I've tried this (https://tryolabs.com/blog/2018/04/17/announcing-luminoth-0-1/) approach but it is giving me output of rectangular box. It is informative enough as area to explore is narrow down enough but still need to remove total background.
I've also tried grabcut (https://docs.opencv.org/4.1.0/d8/d83/tutorial_py_grabcut.html) but that need user interaction otherwise result isn't too good.
I've also tried to use ffmpeg and found this example (http://oioiiooixiii.blogspot.com/2016/09/ffmpeg-extract-foreground-moving.html) but it needs still image so I tried to take background picture before recording video with a person but there are many things required to take difference between background image and video frame.

  



  For opencv approach, I've tried this.

  



  img = cv.imread('pic.png')
mask = np.zeros(img.shape[:2], np.uint8)
bgdModel = np.zeros((1, 65), np.float64)
fgdModel = np.zeros((1, 65), np.float64)
rect = (39, 355, 1977, 2638)
cv.grabCut(img, mask, rect, bgdModel, fgdModel, 5, cv.GC_INIT_WITH_RECT)
mask2 = np.where((mask==2)|(mask==0), 0, 1).astype('uint8')
img = img*mask2[:, :, np.newaxis]
plt.imshow(img), plt.colorbar(), plt.show()


  



  But it is removing some of person's part too.
Also tried ffmpeg way but not a good result.

  



  ffmpeg -report -y -i "img.jpg" -i "vid.mov" -filter_complex "[1:v]format=yuva444p,lut=c3=128[video2withAlpha],[0:v][video2withAlpha]blend=all_mode=difference[out]" -map "[out]" "output.mp4"


  



  All I need is just a person's image/video take under any normal background without user interaction like area selection or any other thing like that. Luminoth has trained data but that is giving box of person not exact person so that I can remove. Any help or guidance to remove background will be appreciated.

  


• Evolution #4727 : Des pictos / icônes symboliques pour tout le monde

  14 avril 2021

  Testé brièvement : les mask-image fonctionnent très bien en substitut de la font-face, et ça hérite bien de la taille du texte.
  Donc partir des seuls svg il serait possible de générer à la fois le sprite et la CSS des classes sémantiques, super pratique.
  Je crois que je vais partir là-dessus.

  Un truc bizarre cependant : quand sur la même page on a à la fois un svg et une classe qui utilisent tous deux le même sprite svg, et bien le navigateur le charge 2 fois.
  Peut-être qu’à ce compte là, la classe devrait utiliser les svg indépendants plutôt que le sprite. Enfin bon, ce seront des questions techniques secondaires à résoudre au fil de l’eau dans le plugin, je note juste ça au passage.

  <span class="CodeRay"><span class="tag">span> <span class="attribute-name">width</span>=<span class="string"><span class="delimiter">"</span><span class="content">1em</span><span class="delimiter">"</span></span> <span class="attribute-name">height</span>=<span class="string"><span class="delimiter">"</span><span class="content">1em</span><span class="delimiter">"</span></span> <span class="attribute-name">fill</span>=<span class="string"><span class="delimiter">"</span><span class="content">currentColor</span><span class="delimiter">"</span></span><span class="tag">></span>
  
      <span class="tag">span> <span class="attribute-name">xlink:href</span>=<span class="string"><span class="delimiter">"</span><span class="content">sprite.svg#briefcase</span><span class="delimiter">"</span></span><span class="tag">/></span>
  
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  <span class="tag">span> <span class="attribute-name">class</span>=<span class="string"><span class="delimiter">"</span><span class="content">sp-icone_briefcase</span><span class="delimiter">"</span></span><span class="tag">></span>Texte avec icône CSS<span class="tag"></span></span>
  
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• The ultimate solution to knowing how your business is performing overall

  8 janvier 2018, par InnoCraft — Community, Plugins

  Would you like to know how your business is performing overall at a glance ? Guess what, you can now do this easily with Roll-Up Reporting.

  What is Roll-Up Reporting about ?

  Roll-Up Reporting is a premium feature which you can acquire through the Piwik Marketplace. Developed by InnoCraft, the professional company behind Piwik, this plugin will :

  1. Save you heaps of time and gives you completely new insights
  2. Make this process easy as pie
  3. Reflect the structure of your business or organization

  1 – Roll-Up Reporting does the maths for you

  Yes, you read it right. Compared to having to sum reports of multiple websites manually, you can get aggregated results for your business or departments instantly with a single click directly in Piwik. Not only does this save you heaps of time compared to doing this complicated work in a spreadsheet, you also avoid human errors. With this feature, you get a clear overview over all your websites, apps, and shops performances.

  For example, if you want to know which referrers bring you the most value across all websites, then you will get the answer in a report. Same results for e-commerce reports, actions, and other metrics.

  2 – Easy as pie, no tracking code involved

  The best part of this feature is that you do not need to push data through additional tracking code. The setup is simple and made through the UI of the plugin.

  3 – Roll-Up Reporting meets even the hardest requirements

  You can also create “nested roll-ups”. This feature allows you to create a roll-up consisting of several other roll-ups. With a nested roll-up, you can create a roll-up for each department in your company (and assign all the websites of a department to that roll-up), then group several departments easily into a new roll-up simply by assigning several department roll-ups to this new roll-up.

  

  For example, a company with multiple brands can assign multiple websites to each brand, and then get aggregated results for each brand and for the business overall. As a roll-up is basically the same as a website, you can give users access to a roll-up without having to give them access to each site, and the other way around.

  How does it work ?

  As with all premium features, this plugin is straightforward to use. Once activated in your Piwik administrator panel, you will notice that when you add a website, you have the choice between two possibilities :

  

  When you select the “Roll-Up” option, a new window will appear asking you which websites and mobile apps you would like to aggregate into a roll-up :

  

  The created roll-up will then be shown just like any other website that you have in Piwik. You can create as many roll-up entities as you want.

  

  Features, such as custom alerts, segments, and e-mail reports work for a roll-up just like for any website.

  Real-Time reports

  One of the most interesting features of Roll-Up Reporting is, that you can view all the Real-Time reports, such as the “Visitors in Real-Time” widget, the “Real-Time Map”, and the “Visitor Log” across several websites making it much easier to keep an eye on your business :

  

  How to get the Roll-up reporting plugin ?

  Developed by InnoCraft, the makers of Piwik, Roll-Up Reporting is a premium feature which you can purchase on the Piwik Marketplace. You can also try it for free on the Piwik Cloud for 30 days.

  Learn more about the Roll-Up Reporting feature