Get YouTube or Vimeo Thumbnails in one shot with jQuery

问题

I'm trying to put YouTube thumbnail and Vimeo thumbnail together in the same script, but its not really easy for me because I'm a new to jQuery.

I would to ask if somebody could take a look to this jQuery script that works fine in any browser: http://jquery-howto.blogspot.com/2009/02/how-to-get-youtube-video-screenshot.html

I've also seen the question: Get img thumbnails from Vimeo?, but there's nothing about how to do it with jQuery.

I think it should be very easy to make for who already know the jQuery coding, and it would be the definitive solutions for who's going to make a Tumblr theme that uses both videos.

回答1:

You do this by observing that YouTube video thumbnails have a distinct URL pattern, which you can generate by parse out the video id. Vimeo thumbnails can be obtained similarly, but parsing out the video id and then using the simple API to obtain the link to the thumbnail.

I wrote some code to do this for this Meta question; it's not particularly clean but it should work:

function processURL(url, success){
    var id;

    if (url.indexOf('youtube.com') > -1) {
        id = url.split('/')[1].split('v=')[1].split('&')[0];
        return processYouTube(id);
    } else if (url.indexOf('youtu.be') > -1) {
        id = url.split('/')[1];
        return processYouTube(id);
    } else if (url.indexOf('vimeo.com') > -1) {
        if (url.match(/^vimeo.com\/[0-9]+/)) {
            id = url.split('/')[1];
        } else if (url.match(/^vimeo.com\/channels\/[\d\w]+#[0-9]+/)) {
            id = url.split('#')[1];
        } else if (url.match(/vimeo.com\/groups\/[\d\w]+\/videos\/[0-9]+/)) {
            id = url.split('/')[4];
        } else {
            throw new Error('Unsupported Vimeo URL');
        }

        $.ajax({
            url: 'http://vimeo.com/api/v2/video/' + id + '.json',
            dataType: 'jsonp',
            success: function(data) {
                sucess(data[0].thumbnail_large);
            }
        });
    } else {
        throw new Error('Unrecognised URL');
    }

    function processYouTube(id) {
        if (!id) {
            throw new Error('Unsupported YouTube URL');
        }

        sucess('http://i2.ytimg.com/vi/' + id + '/hqdefault.jpg');
    }
}

The function uses a callback because Vimeo API calls are asynchronous.

回答2:

I used everything that Yi Jiang suggested. I had to change a couple of lines to get it working properly for me, the changes are noted with below:

function processURL(url, success){
var id;

if (url.indexOf('youtube.com') > -1) {
    <!-- CHANGED -->
    id = url.split('v=')[1].split('&')[0];
    return processYouTube(id);
} else if (url.indexOf('youtu.be') > -1) {
    id = url.split('/')[1];
    return processYouTube(id);
} else if (url.indexOf('vimeo.com') > -1) {
    <!-- CHANGED -->
    if (url.match(/http:\/\/(www\.)?vimeo.com\/(\d+)($|\/)/)) {
        id = url.split('/')[1];
    } else if (url.match(/^vimeo.com\/channels\/[\d\w]+#[0-9]+/)) {
        id = url.split('#')[1];
    } else if (url.match(/vimeo.com\/groups\/[\d\w]+\/videos\/[0-9]+/)) {
        id = url.split('/')[4];
    } else {
        throw new Error('Unsupported Vimeo URL');
    }

    $.ajax({
        url: 'http://vimeo.com/api/v2/video/' + id + '.json',
        dataType: 'jsonp',
        success: function(data) {
            <!-- CHANGED -->
             success(data[0].thumbnail_large);
        }
    });
} else {
    throw new Error('Unrecognised URL');
}

function processYouTube(id) {
    if (!id) {
        throw new Error('Unsupported YouTube URL');
    }
    <!-- CHANGED -->
    success('http://i2.ytimg.com/vi/' + id + '/hqdefault.jpg');
}
}

The 2 bottom changes were just to fix the 'success' spelling.

回答3:

Also, Vimeo uses https://vimeo.com/n format so make the s optional and the id is the 4th[3] not 2nd[1] in the split array:

function get_video_thumb(url, callback){
    var id = get_video_id(url);

    if (id['type'] == 'y') {
        return processYouTube(id);
    } else if (id['type'] == 'v') {

        $.ajax({
            url: 'http://vimeo.com/api/v2/video/' + id['id'] + '.json',
            dataType: 'jsonp',
            success: function(data) {
                callback({type:'v', id:id['id'], url:data[0].thumbnail_large});
            }
        });
    }

    function processYouTube(id) {
        if (!id) {
            throw new Error('Unsupported YouTube URL');
        }

        callback({type:'y',id:id['id'],url:'http://i2.ytimg.com/vi/'+id['id'] + '/hqdefault.jpg'}); 
    }
}

function get_video_id(url) {
        var id;
        var a;
    if (url.indexOf('youtube.com') > -1) {
        id = url.split('v=')[1].split('&')[0];
        return processYouTube(id);
    } else if (url.indexOf('youtu.be') > -1) {
        id = url.split('/')[1];
        return processYouTube(id);
    } else if (url.indexOf('vimeo.com') > -1) {
    if (url.match(/https?:\/\/(www\.)?vimeo.com\/(\d+)($|\/)/)) {
        id = url.split('/')[3];
    } else if (url.match(/^vimeo.com\/channels\/[\d\w]+#[0-9]+/)) {
        id = url.split('#')[1];
    } else if (url.match(/vimeo.com\/groups\/[\d\w]+\/videos\/[0-9]+/)) {
        id = url.split('/')[4];
    } else {
        throw new Error('Unsupported Vimeo URL');
    }

    } else {
        throw new Error('Unrecognised URL');
    }
        a = {type:'v',id:id};
        return a;
    function processYouTube(id) {
        if (!id) {
            throw new Error('Unsupported YouTube URL');
        }
                a = {type:'y',id:id};
        return(a); // default.jpg OR hqdefault.jpg
    }
}

回答4:

I think that now at vimeo.com the id is always the last value...

} else if (sourceVideo.indexOf("vimeo.com") >= 0) {
    id = sourceVideo.split('/');
    id = id[id.length-1];
}

Don't need the 3 regex.

回答5:

Here is my example,

Sample YouTube URL: https://www.youtube.com/watch?v=DNWo43u6Kqo

Sample Vimeo URL : https://player.vimeo.com/video/30572181

<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"></script>
    <title>Video Thumbnails</title>
</head>
<body>
    <div style="width:80%">
        YouTube/Vimeo URL : 
        <input type="text" id="txtVideoLink" value="https://player.vimeo.com/video/30572181" style="width:30%"/>
        <a href="javascript:void(0)" onclick="GetImageFromVideoURL()">Get Video Thumbnail</a>
        <br />
        <br />
        <img src="" id="thumbImg">
    </div>

    <script>
        function GetImageFromVideoURL() {
            var i, image_url, isValidURL, isVValidURL, isEmbValidURL, uniqueIdLength, uniqueID;
            uniqueIdLength = 11;
            image_url = $('#txtVideoLink').val();

            var url;
            if (image_url != null) {
                url = image_url;
            }
            else {
                url = "";
            }

            if (url.search("youtube") != -1) {
                isValidURL = image_url.indexOf("www.youtube.com/watch?v=");
                isVValidURL = image_url.indexOf("www.youtube.com/v/");
                isEmbValidURL = image_url.indexOf("www.youtube.com/embed/");

                if (isValidURL == -1 && isVValidURL == -1 && isEmbValidURL == -1) {
                    alert("Invalid URL");
                    return false;
                }

                if (isValidURL != -1) {
                    i = image_url.indexOf("v=");
                }
                else if (isVValidURL != -1) {
                    i = image_url.indexOf("v/");
                }
                else if (isEmbValidURL != -1) {
                    i = image_url.indexOf("embed/");
                    i = i + 4;
                }
                i = i + 2;

                uniqueID = image_url.substr(i, uniqueIdLength);
                imageURL = 'https://img.youtube.com/vi/' + uniqueID + '/0.jpg';
                $('#thumbImg').attr("src", imageURL);
                return true;
            }
            else if ((url.search("vimeo") != -1)) {
                isVimeoURL = image_url.indexOf("vimeo.com/video");
                isvVimeoURL = image_url.indexOf("www.vimeo.com/video");
                if (isVimeoURL == -1 && isvVimeoURL == -1) {
                    alert("Invalid URL");
                    return false;
                }

                if (isVimeoURL != -1) {
                    i = image_url.indexOf("video/");
                }
                i = i + 6;

                uniqueID = image_url.substr(i, uniqueIdLength);

                $.ajax({
                    type: 'GET',
                    url: 'https://vimeo.com/api/v2/video/' + uniqueID + '.json',
                    jsonp: 'callback',
                    dataType: 'jsonp',
                    success: function (data) {
                        var thumbnail_src = data[0].thumbnail_large;
                        $('#thumbImg').attr("src", thumbnail_src);
                    }
                });
                return true;
            }
            alert("Invalid URL");
            $('#txtVideoLink').val("");
            return false;
        }

    </script>
</body>
</html>

来源：https://stackoverflow.com/questions/5201534/get-youtube-or-vimeo-thumbnails-in-one-shot-with-jquery

标签

jquery

youtube

thumbnails

vimeo