本文介绍了如何从我的自定义DASH像视频播放器中制作HLS视频播放器?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在制作一个网络视频播放器，它可以将视频类型从2d更改为3d，将视频质量从2160p更改为144p，将视频fps从60fps更改为5fps，将音频从英语更改为泰米尔语，并将字幕从其他语言更改为其他语言.我无法使视频播放器在IOS上运行，因为IOS仅支持HLS.因此，我需要有关如何制作HLS视频播放器的指南，该视频播放器可以像DASH这样的视频播放器完全运行.我可以通过此演示使我的DASH像视频播放器一样: http://nickdesaulniers.github.io/netfix/demo/bufferAll.html .因此，如果有一个显示与该演示类似的HLS视频播放器演示，我想我将设法制作一个HLS视频播放器.如果HLS无法使用我的功能，请说明其他方法.谢谢
I'm making a web video player which can change the video type from 2d to 3d, video quality from 2160p to 144p, video fps from 60fps to 5fps, audio from english to tamil and subtitles from off to other languages. I cannot make my video player work on IOS because IOS supports HLS only. So I need guidance to how my make a HLS video player which will operate EXACTLY like my DASH like video player. I was able to make my DASH like video player from this demo: http://nickdesaulniers.github.io/netfix/demo/bufferAll.html. So if there is a HLS video player demo which shows something similar to this demo, I think I'll manage to make a HLS video player. If HLS cannot make my features, please state another methods. Thanks
此处的完整示例项目: https://drive.google. com/file/d/156mDgIltBGMkXhx4LZfShxv3A8JrwkNP/view?usp = sharing
Full sample project here: https://drive.google.com/file/d/156mDgIltBGMkXhx4LZfShxv3A8JrwkNP/view?usp=sharing
我的代码(这是我原始视频播放器的一小部分示例):
My Code (This is a small sample of my original video player):
<html>
<head>
<meta charset="utf-8"/>
<title>ORIGINAL</title>
</head>
<body>
<video controls style="width: 100%; height: 50%;"></video>
<br>
<select width="100px">
</select>
<br>
<div id="current_time_message" style="text-align: center; width: 100%; font-size: 25px;"></div>
<br>
Note: You can only make the chages using the 'select' before the Total Segements Loaded of this sample.
<script>
var set_timer = undefined;
var content_class = new Content_Class();
function Content_Class() {
var video_player = document.querySelector("video");
var total_segments = 30,
total_segements_call = false,
current_segment = 0;
var mediaSource = undefined,
sourceBuffer_video = undefined,
sourceBuffer_audio = undefined;
var current_video_type = "2d",
current_video_quality = "2160p",
current_video_frame_rate = "60fps",
current_audio = "english",
current_subtitle = "off",
changed_content = "";
var subtitles_list = [[undefined, "english", "English", "to_be_downloaded"], [undefined, "arabic", "Arabic", "to_be_downloaded"]];
var content_types_list = [["video-type_options", "2d", "3d"], ["video-quality_options", "2160p", "144p"], ["video-fps_options", "60fps", "5fps"], ["audio_options", "tamil", "english"], ["subtitle_options", "off", "english", "arabic"]];
var main_function_CALLS = "appending",
video_append_CALLS = undefined,
audio_append_CALLS = undefined,
seek_bar_time_change_CALLS = true,
re_appendable_check_CALLS = 0,
remove_for_call_change_part2_CALLS = 0,
new_content_CALLS = 0,
time_change_reappend_CALLS = 0;
function url_maker(type, number) {
var url = "resources/";
if (type == "video") {
return url += type + "/" + current_video_type + "/" + current_video_frame_rate + "/" + current_video_quality + "/" + current_video_type + "_" + current_video_frame_rate + "_" + current_video_quality + "_" + number + ".mp4";
} else if (type == "audio") {
return url += type + "/" + current_audio + "/" + current_audio + "_" + number + ".mp4";
} else {
return url += type + "/" + current_subtitle + "/" + current_subtitle + ".txt";
}
}
function start() {
mediaSource = new MediaSource();
video_player.src = URL.createObjectURL(mediaSource);
for (var x = 0; x < subtitles_list.length; x++)
{
subtitles_list[x][0] = video_player.addTextTrack("captions", undefined, subtitles_list[x][2]);
}
mediaSource.addEventListener('sourceopen', function () {
mediaSource.duration = total_segments * 5;
sourceBuffer_video = mediaSource.addSourceBuffer('video/mp4; codecs="avc1.64000d"');
sourceBuffer_video.mode = 'sequence';
sourceBuffer_audio = mediaSource.addSourceBuffer('audio/mp4; codecs="mp4a.40.5"');
sourceBuffer_audio.mode = 'sequence';
Interactions();
main_function();
});
}
function Interactions() {
var current_time_message = document.getElementById("current_time_message");
var options = document.querySelector("select");
video_player.ontimeupdate = function () {
if (!total_segements_call) {
current_time_message.innerHTML = "Video Downloaded from " + new Date(video_player.currentTime * 1000).toISOString().substr(11, 8) + " to " + new Date(current_segment * 1000).toISOString().substr(11, 8);
}
}
for (var y=0;y<content_types_list.length;y++) {
for (var x=1;x<content_types_list[y].length;x++) {
var insert = document.createElement("option");
insert.text = content_types_list[y][0].split("_")[0].toUpperCase() + ": " + content_types_list[y][x].toUpperCase();
options.add(insert);
}
}
options.onchange = function() {
var text = options.options[options.selectedIndex].value;
text = text.split(": ");
changed_content = text[0].toLowerCase() + "_" + text[1].toLowerCase();
main_function_CALLS = "content changed";
}
}
function main_function() {
if (main_function_CALLS == "appending") {
console.log("----------", current_video_type, current_video_frame_rate, current_video_quality, current_audio, current_subtitle, "----------");
window.clearTimeout(set_timer);
current_segment++;
if (current_segment <= total_segments) {
appending_sources(current_segment);
} else {
var current_time_message = document.getElementById("current_time_message");
current_time_message.innerHTML = "Total segements Loaded";
total_segements_call = true;
}
} else if (main_function_CALLS == "content changed") {
change_content();
}
}
function appending_sources(x) {
video_append_CALLS = false;
audio_append_CALLS = false;
request_xhr (url_maker('video', x), 'arraybuffer', ['video', x, sourceBuffer_video], function (buffer) {
sourceBuffer_video.addEventListener('updateend', re_appendable_check);
sourceBuffer_video.appendBuffer(buffer);
video_append_CALLS = true;
});
request_xhr (url_maker('audio', x), 'arraybuffer', ['audio', x, sourceBuffer_audio], function (buffer) {
sourceBuffer_audio.addEventListener('updateend', re_appendable_check);
sourceBuffer_audio.appendBuffer(buffer);
audio_append_CALLS = true;
});
}
function re_appendable_check() {
if (++re_appendable_check_CALLS == 2) {
sourceBuffer_video.removeEventListener('updateend', re_appendable_check);
sourceBuffer_audio.removeEventListener('updateend', re_appendable_check);
re_appendable_check_CALLS = 0;
video_player_old_time = parseInt((video_player.currentTime / 5).toString().split(".")[0]);
main_function();
}
}
function crash_reappend(sourceBuffer, response, number, id) {
window.clearTimeout(set_timer);
try {
sourceBuffer.addEventListener('updateend', re_appendable_check);
sourceBuffer.appendBuffer(response);
console.log("FINALLY Appended " + id + ": " + number);
} catch (err) {
sourceBuffer.removeEventListener('updateend', re_appendable_check);
if (main_function_CALLS == "appending") {
console.log("Appending Again Failed of " + id + " at " + number);
set_timer = window.setTimeout(function(){crash_reappend(sourceBuffer, response, number, id);}, 5000);
} else {
remove_for_call_change(number);
}
}
}
function remove_for_call_change (number) {
window.clearTimeout(set_timer);
re_appendable_check_CALLS = 0;
function remove_for_call_change_part2() {
if (++remove_for_call_change_part2_CALLS == 2) {
sourceBuffer_video.removeEventListener('updateend', remove_for_call_change_part2);
sourceBuffer_audio.removeEventListener('updateend', remove_for_call_change_part2);
remove_for_call_change_part2_CALLS = 0;
current_segment -= 1;
sourceBuffer_video.timestampOffset = current_segment*5;
sourceBuffer_audio.timestampOffset = current_segment*5;
video_player_old_time = parseInt((video_player.currentTime / 5).toString().split(".")[0]);
main_function();
}
}
if (!sourceBuffer_audio.updating && !sourceBuffer_video.updating) {
re_appendable_check_CALLS = 0;
sourceBuffer_video.removeEventListener('updateend', re_appendable_check);
sourceBuffer_audio.removeEventListener('updateend', re_appendable_check);
sourceBuffer_video.addEventListener('updateend', remove_for_call_change_part2);
sourceBuffer_audio.addEventListener('updateend', remove_for_call_change_part2);
sourceBuffer_video.remove((number*5)-5, number*5);
sourceBuffer_audio.remove((number*5)-5, number*5);
} else {
set_timer = window.setTimeout(function(){remove_for_call_change(number);}, 2000);
}
}
function request_xhr(url, responsetype, type, input_function)
{
var xhr = new XMLHttpRequest;
xhr.open('get', url);
xhr.responseType = responsetype;
xhr.onload = function() {
try {
input_function(xhr.response);
console.log("Appended " + type[0] + ": " + type[1]);
} catch (err) {
if (responsetype != "") {
console.log("Appending Failed of " + type[0] + " at " + type[1]);
type[2].removeEventListener('updateend', re_appendable_check);
crash_reappend(type[2], xhr.response, type[1], type[0]);
} else {
console.log("SUBTITLE FAILED");
}
}
};
xhr.send();
}
function change_content() {
var change_content_type = changed_content.split("_")[0];
var change_content = changed_content.split("_")[1].toLowerCase();
if (change_content_type == "video-type") {
if (current_video_type != change_content) {
current_video_type = change_content;
new_content();
} else {main_function_CALLS = "appending";main_function();}
} else if (change_content_type == "video-quality") {
if (current_video_quality != change_content) {
current_video_quality = change_content;
new_content();
} else {main_function_CALLS = "appending";main_function();}
} else if (change_content_type == "video-fps") {
if (current_video_frame_rate != change_content) {
current_video_frame_rate = change_content;
new_content();
} else {main_function_CALLS = "appending";main_function();}
} else if (change_content_type == "audio") {
if (current_audio != change_content) {
current_audio = change_content;
new_content();
} else {main_function_CALLS = "appending";main_function();}
} else if (change_content_type == "subtitle") {
console.log(change_content_type, change_content);
if (current_subtitle != change_content) {
current_subtitle = change_content;
subtitle_change();
} else {main_function_CALLS = "appending";main_function();}
}
function new_content() {
function content_changed_reappend() {
if (++new_content_CALLS == 2) {
sourceBuffer_video.removeEventListener('updateend', content_changed_reappend);
sourceBuffer_audio.removeEventListener('updateend', content_changed_reappend);
new_content_CALLS = 0;
current_segment = parseInt((video_player.currentTime / 5).toString().split(".")[0]);
sourceBuffer_video.timestampOffset = current_segment*5;
sourceBuffer_audio.timestampOffset = current_segment*5;
main_function_CALLS = "appending";
main_function();
}
}
sourceBuffer_video.addEventListener('updateend', content_changed_reappend);
sourceBuffer_audio.addEventListener('updateend', content_changed_reappend);
sourceBuffer_video.remove(0, total_segments * 5);
sourceBuffer_audio.remove(0, total_segments * 5);
}
function subtitle_change() {
if (current_subtitle == "off") {
for (var x = 0; x < subtitles_list.length; x++) {
subtitles_list[x][0].mode = "hidden";
}
} else {
for (var x = 0; x < subtitles_list.length; x++) {
if (subtitles_list[x][1] == current_subtitle) {
if (subtitles_list[x][3] != "downloaded") {
var num = x; //wierd problem
subtitles_list[num][0].mode = "showing";
request_xhr(url_maker("subtitle", 0), "", ['subtitle', 0], function(buffer) {
var file = buffer.split('\n');
for (var y = 0; y < file.length; y+=2) {
subtitles_list[num][0].addCue(new VTTCue(file[y].split(" --> ")[0], file[y].split(" --> ")[1], file[y+1].replace(/\\n/g, '\n')));
}
});
subtitles_list[num][3] = "downloaded";
} else {
subtitles_list[x][0].mode = "showing";
}
} else {
subtitles_list[x][0].mode = "hidden";
}
}
}
main_function_CALLS = "appending";
main_function();
}
}
return {
start: start
};
}
set_timer = window.setTimeout(content_class.start(), 1);
</script>
</body>
</html>
推荐答案
在iOS中，由于<video>标记本身支持HLS回放，因此您可以以更简单的方式获得HLS回放.您只需执行<video src="https://example.com/manifest.m3u8">，它就会起作用.
In iOS, you can get HLS playback in a much simpler fashion, since it is natively supported by the <video>tag. You can simply do <video src="https://example.com/manifest.m3u8"> and it will work.
或者，您也可以在那里尝试使用Media Source Extensions，但是编写自己的播放器似乎过于复杂.如果我是我，我可能会看hls.js.
Alternatively, you can try and use Media Source Extensions there as well, but writing your own player seems overly complicated. I would probably look at hls.js if I were you.
这篇关于如何从我的自定义DASH像视频播放器中制作HLS视频播放器?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！