Ensuring the HTML5 video poster matches the dimensions of the video content

Is there a way to adjust the HTML5 video poster so it perfectly fits the dimensions of the video itself?

Check out this JSFiddle demonstrating the issue: http://jsfiddle.net/zPacg/7/

Here's the code snippet:

HTML:

<video controls width="100%" height="100%"  poster="http://www.wpclipart.com/blanks/buttons/glossy_buttons/glossy_button_blank_orange_rectangle.png">
  <source src="http://demo.inwebson.com/html5-video/iceage4.mp4" type="video/mp4" />
  <source src="http://demo.inwebson.com/html5-video/iceage4.ogg" type="video/ogg" />
  <source src="http://demo.inwebson.com/html5-video/iceage4.webm" type="video/webm" />
</video>​

CSS:

video{
border:1px solid red;
}​

It's evident that the orange rectangle doesn't scale properly to the red border of the video.

Simply adding the CSS below doesn't solve the issue, as it resizes both the video and the poster:

video[poster]{
height:100%;
width:100%;
}
csshtmlattributeshtml5-video

Answer №1

If you want to address this issue based on your target browsers, one potential solution could be utilizing the object-fit property like so:

object-fit: cover;

Alternatively, you might find that using fill meets your needs. Keep in mind that it is still being considered for IE compatibility.

Answer №2

If you want to achieve a background image stretched to the height and width of a video, one option is to use a transparent poster image along with a CSS background image. You can see an example here. Another approach is to utilize an absolutely positioned <img> tag as explained in this helpful post on Stack Overflow (see example).

For browsers that support it, you can also set the background-size property to 100% 100%, as outlined in this Stack Overflow answer (view details here) (check out example).

Update

An alternative method recommended by @Lars Ericsson involves using the object-fit CSS property.

Simply apply:

object-fit: cover;

if you wish to avoid displaying parts of the image that don't match the video's aspect ratio. For stretching the image to fit the video's aspect ratio, use:

object-fit: fill;

Check out this example for implementation.

Answer №3

If you want the VIDEO background to be visible, you can simply add the preload="none" attribute and utilize background-size: cover;.

 video {
   background: transparent url('video-image.jpg') 50% 50% / cover no-repeat ;
 }

 <video preload="none" controls>
   <source src="movie.mp4" type="video/mp4">
   <source src="movie.ogg" type="video/ogg">
 </video>

Answer №4

After experimenting with different approaches, I tested various solutions until I stumbled upon a handy suggestion from Google Chrome's Inspector tool. By incorporating the following CSS snippet, my issue was resolved:

video{
   object-fit: inherit;
}

Answer №5

I have come up with a unique solution that combines the ideas from user2428118 and Veiko Jääger, allowing for preloading without the need for a separate transparent image. Instead, we utilize a base64 encoded 1px transparent image as the poster.

<style type="text/css" >
    video{
        background: transparent url("poster.jpg") 50% 50% / cover no-repeat ;
    }
</style>
<video controls poster="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" > ;
    <source src="movie.mp4" type="video/mp4">
    <source src="movie.ogg" type="video/ogg">
</video>

Answer №6

<video src="videofile.webm" poster="posterimage.jpg" controls preload="metadata">
    Sorry, your browser doesn't support embedded videos.
</video>

Overlay

video{
   object-fit: overlay; /*to overlay the video on top of other elements*/
}

Stretch 

video{
   object-fit: stretch; /*to stretch the video to fill the container*/
   object-position: center; /* to center our image*/
}

Keep in mind that the video controls may cover parts of our content, adjust accordingly by adding padding or margins as needed. If you are using object-fit overlay, ensure your design accounts for this visually.

Answer №7

After some brainstorming, I discovered a clever solution that works flawlessly. The goal is to eliminate the initial frame of a video from displaying and then resize the placeholder image to match the video's actual dimensions. This can be achieved by setting specific dimensions for the container. With one task completed, another still remains. To address this, I found that defining a fake poster for the video effectively removes the first frame while maintaining transparency in the background.

Although straightforward to implement, it's worth noting that compatibility with various web browsers may vary when adjusting the background size of the container div using "background-size".

Here's how you can incorporate this technique in your HTML/HTML5 code:

<div class="video_poster">
    <video poster="fakeposter.jpg" controls>
        <source src="videos/myvideo.mp4" type="video/mp4">
        Your browser does not support the video tag.
    </video>
<div>

To style the elements accordingly, update your CSS as follows:

video{
    width:694px;
    height:390px;
}
.video_poster{
    width:694px;
    height:390px;
    background-size:694px 390px;
    background-image:url(images/myvideo_poster.jpg);
}

Answer №8

Utilize a poster image instead of a video on mobile devices (or on devices that do not support video autoplay). This is because some mobile devices do not support video autoplay functionality.

<div id="wrap_video">
<video preload="preload" id="Video" autoplay="autoplay" loop="loop" poster="default.jpg">
<source src="Videos.mp4" type="video/mp4">
Your browser does not support the <code>video</code> tag.
</video>
</div>

You can style the poster attribute within the video tag for mobile devices using media queries.

#wrap_video
{
width:480px;
height:360px;
position: relative;
} 
@media (min-width:360px) and (max-width:780px)
{
video[poster]
{
top:0 !important;
left:0 !important;
width:480px !important;
height:360px !important;
position: absolute !important;
}
}

Answer №9

Avoid using unnecessary divs.

Here's an example of HTML:

<video controls width="100%" height="100%"  poster="http://www.wpclipart.com/blanks/buttons/glossy_buttons/glossy_button_blank_orange_rectangle.png">
  <source src="https://mathisart.org/vid0000_plandemic.mp4" type="video/mp4" />
  <source src="https://mathisart.org/vid0000_plandemic.ogg" type="video/ogg" />
  <source src="https://mathisart.org/vid0000_plandemic.webm" type="video/webm" />
</video>​

In the CSS, you can use:

video[poster]{ object-fit:cover; }  /* or object-fit:fill */

Answer №10

If you're looking to create a fully responsive video, using CSS aspect-ratio is the way to go.

Check out the example below of a video with a poster that has a different aspect ratio than the video itself.

By setting the video width to 100% and height to auto, you can maintain the specified aspect ratio for the video.

When combined with object-fit: cover, the poster image will fit within the computed dimensions of the video element.

You also have the option to adjust the position of the poster using object-position.

Note 1: CSS variables are used here for clarity, reflecting the native height and width of the video source.
Note 2: Another benefit of using aspect-ratio is that browsers can render page elements and allocate space for the video before loading its metadata, reducing layout shifts and improving user experience.
Note 3: Unfortunately, Safari hides the poster as soon as the video loads.

video {
  --video-width: 426;
  --video-height: 240;
  aspect-ratio: var(--video-width) / var(--video-height);
  width: 100%;
  height: auto;
  object-fit: cover;
}
<video controls poster="https://media.newyorker.com/photos/5c5349189922c254df56d625/master/pass/Syme-Irving-Penn.jpg">
  <source src="https://archive.org/download/ElephantsDream/ed_1024_512kb.mp4" type="video/mp4">
</video>

Answer №11

After encountering a problem, I was able to resolve it by generating an image that shared the same aspect ratio as my video (16:9). By setting the width of the video tag to 100%, the image (320 x 180) now fits seamlessly. Hopefully, this solution proves useful to others!

Answer №12

Adjust the size of the image after creating a thumbnail

exec("ffmpeg -i $video_image_dir/out.png -vf scale=320:240 {$video_image_dir}/resize.png",$out2, $return2);

Answer №13

height:500px;
min-width:100%;
-webkit-background-size: 100% 100%;
-moz-background-size: 100% 100%;
-o-background-size: 100% 100%;
background-size:100% 100%;
object-fit:cover;

-webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size:cover;

Answer №14

Success achieved

<video class="video-container" poster="/" controls>
    <source src="specific source" type="video/mp4">
</video>

Plus the styling in CSS

.video-container{
 background-image: 'specified image';
 background-size: cover;
}

Answer №15

  <div class="container">
        <video poster="~/Content/WebSite/img/SiteSetting/Load.gif" autoplay muted loop class="myVideo">
            <source src="~/Content/WebSite/images/VideoTube.mp4" type="video/mp4" />
        </video>

    </div>



 <style>
    .myVideo {
position: absolute;
right: 0;
left: 0;
bottom: 0;
min-width: 100%;
min-height: 100%;
object-fit: inherit;
 }
@media only screen and (max-width:768px) {
.myVideo {
    position: absolute;
    right: 0;
    left: 0;
    bottom: 0;
    max-width: -webkit-fill-available;
    min-height: 100%;
    object-fit: cover;
    }
   }

     @media only screen and (max-width:320px) {
.myVideo {
    position: absolute;
    right: 0;
    left: 0;
    bottom: 0;
    max-width: -webkit-fill-available;
    min-height: 100%;
    object-fit: cover;
  }
}
</style>

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