我用PHP编写了一个完整的系统,并在服务器上使用bash在我的VPS上转换和流式传输HTML5中的视频。转换由ffmpeg在后台完成,内容输出到 block.txt 。
查看了以下帖子:
Can ffmpeg show a progress bar?
和
ffmpeg video encoding progress bar
除其他外,我找不到一个有效的例子。
我需要以百分比的形式获取当前编码的进度。
我上面链接的第一篇帖子提供了:
$log = @file_get_contents('block.txt');
preg_match("/Duration:([^,]+)/", $log, $matches);
list($hours,$minutes,$seconds,$mili) = split(":",$matches[1]);
$seconds = (($hours * 3600) + ($minutes * 60) + $seconds);
$seconds = round($seconds);
$page = join("",file("$txt"));
$kw = explode("time=", $page);
$last = array_pop($kw);
$values = explode(' ', $last);
$curTime = round($values[0]);
$percent_extracted = round((($curTime * 100)/($seconds)));
echo $percent_extracted;
$ percent_extracted变量回显零,因为数学不是我的强项,我真的不知道如何在这里取得进展。
这是来自block.txt的ffmpeg输出的一行(如果它有用)
时间= 00:19:25.16比特率= 823.0kbits / s帧= 27963 fps = 7 q = 0.0 size = 117085kB时间= 00:19:25.33比特率= 823.1kbits / s帧= 27967 fps = 7 q = 0.0 size = 117085kB time = 00:19:25.49 bitrate = 823.0kbits / s 帧= 27971 fps = 7 q = 0.0 size = 117126kB
请帮我输出这个百分比,一旦完成,我可以创建自己的进度条。感谢。
答案 0 :(得分:42)
好的,我已经找到了我需要的东西 - 希望这对其他人也有帮助!
首先,您希望将ffmpeg数据输出到服务器上的文本文件中。
ffmpeg -i path/to/input.mov -vcodec videocodec -acodec audiocodec path/to/output.flv 1> block.txt 2>&1
因此,ffmpeg输出是block.txt。现在在PHP中,让我们这样做!
$content = @file_get_contents('../block.txt');
if($content){
//get duration of source
preg_match("/Duration: (.*?), start:/", $content, $matches);
$rawDuration = $matches[1];
//rawDuration is in 00:00:00.00 format. This converts it to seconds.
$ar = array_reverse(explode(":", $rawDuration));
$duration = floatval($ar[0]);
if (!empty($ar[1])) $duration += intval($ar[1]) * 60;
if (!empty($ar[2])) $duration += intval($ar[2]) * 60 * 60;
//get the time in the file that is already encoded
preg_match_all("/time=(.*?) bitrate/", $content, $matches);
$rawTime = array_pop($matches);
//this is needed if there is more than one match
if (is_array($rawTime)){$rawTime = array_pop($rawTime);}
//rawTime is in 00:00:00.00 format. This converts it to seconds.
$ar = array_reverse(explode(":", $rawTime));
$time = floatval($ar[0]);
if (!empty($ar[1])) $time += intval($ar[1]) * 60;
if (!empty($ar[2])) $time += intval($ar[2]) * 60 * 60;
//calculate the progress
$progress = round(($time/$duration) * 100);
echo "Duration: " . $duration . "<br>";
echo "Current Time: " . $time . "<br>";
echo "Progress: " . $progress . "%";
}
这将输出剩余的时间百分比。
你可以把它作为回显到页面的唯一文本片段,从另一个页面你可以使用jQuery执行AJAX请求来获取这段文本并将其输出到div中,例如,更新为您的页面每10秒钟一次。 :)
答案 1 :(得分:5)
ffmpeg现在有一个进度选项,可以更容易地解析输出。
ffmpeg -progress block.txt -i path / to / input.mov -vcodec videocodec -acodec audiocodec path / to / output.flv 2&gt;&amp; 1
在你开始编码之前你可以得到总帧数和其他很多信息(这是用bash做的。我是一个Perl程序员所以我不知道你是怎么得到的信息到PHP脚本中。)
eval $(ffprobe -of flat = s = _ -show_entries stream = height,width,nb_frames,duration,codec_name path / to / input.mov);
宽度= $ {streams_stream_0_width};
高度= $ {streams_stream_0_height};
帧= $ {streams_stream_0_nb_frames};
videoduration = $ {streams_stream_0_duration};
audioduration = $ {streams_stream_1_duration};
编解码器= $ {streams_stream_0_codec_name};
echo $ width,$ height,$ frames,$ videoduration,$ audioduration,$ codec;
-of flate = s = _表示将每个name = value放在一个单独的行上。 -show_entries告诉它显示以下条目(-show_streams的流,-show_format的格式等)stream = ...表示从-show_streams输出中显示这些项目。请尝试以下方法查看可用内容:
ffprobe -show_streams path / to / input.mov
进度文件的输出大约每秒添加一次。编码完成后,内容如下所示。在我的脚本中,每隔一秒我将文件放入一个数组,然后以相反的顺序遍历数组,只使用第一个[最后一个反转之前]两个“进度”行之间的内容,以便我使用文件末尾的最新信息。可能有更好的方法。这是来自没有音频的mp4,因此只有一个流。
框= 86个
FPS = 0.0
stream_0_0_q = 23.0
TOTAL_SIZE = 103173
out_time_ms = 1120000
Out_time相当= 00:00:01.120000
dup_frames = 0
drop_frames = 0
进度=继续
帧= 142
FPS = 140.9
stream_0_0_q = 23.0
TOTAL_SIZE = 415861
out_time_ms = 3360000
Out_time相当= 00:00:03.360000
dup_frames = 0
drop_frames = 0
进度=继续
帧= 185
FPS = 121.1
stream_0_0_q = 23.0
TOTAL_SIZE = 1268982
out_time_ms = 5080000
Out_time相当= 00:00:05.080000
dup_frames = 0
drop_frames = 0
进度=继续
帧= 225
FPS = 110.9
stream_0_0_q = 23.0
TOTAL_SIZE = 2366000
out_time_ms = 6680000
Out_time相当= 00:00:06.680000
dup_frames = 0
drop_frames = 0
进度=继续
帧= 262
FPS = 103.4
stream_0_0_q = 23.0
TOTAL_SIZE = 3810570
out_time_ms = 8160000
Out_time相当= 00:00:08.160000
dup_frames = 0
drop_frames = 0
进度=继续
帧= 299
FPS = 84.9
stream_0_0_q = -1.0
TOTAL_SIZE = 6710373
out_time_ms = 11880000
Out_time相当= 00:00:11.880000
dup_frames = 0
drop_frames = 0
进度=端
答案 2 :(得分:1)
如果javascript更新了您的进度条,javascript可以“直接”执行第2步:
[此示例需要dojo]
1 php:开始转换并将状态写入文本文件 - 示例语法:
exec("ffmpeg -i path/to/input.mov path/to/output.flv 1>path/to/output.txt 2>&1");
对于第二部分,我们需要只需javascript 来读取文件。 以下示例使用dojo.request进行AJAX,但您可以使用jQuery或vanilla或其他任何内容:
[2] js:从文件中获取进度:
var _progress = function(i){
i++;
// THIS MUST BE THE PATH OF THE .txt FILE SPECIFIED IN [1] :
var logfile = 'path/to/output.txt';
/* (example requires dojo) */
request.post(logfile).then( function(content){
// AJAX success
var duration = 0, time = 0, progress = 0;
var result = {};
// get duration of source
var matches = (content) ? content.match(/Duration: (.*?), start:/) : [];
if( matches.length>0 ){
var rawDuration = matches[1];
// convert rawDuration from 00:00:00.00 to seconds.
var ar = rawDuration.split(":").reverse();
duration = parseFloat(ar[0]);
if (ar[1]) duration += parseInt(ar[1]) * 60;
if (ar[2]) duration += parseInt(ar[2]) * 60 * 60;
// get the time
matches = content.match(/time=(.*?) bitrate/g);
console.log( matches );
if( matches.length>0 ){
var rawTime = matches.pop();
// needed if there is more than one match
if (lang.isArray(rawTime)){
rawTime = rawTime.pop().replace('time=','').replace(' bitrate','');
} else {
rawTime = rawTime.replace('time=','').replace(' bitrate','');
}
// convert rawTime from 00:00:00.00 to seconds.
ar = rawTime.split(":").reverse();
time = parseFloat(ar[0]);
if (ar[1]) time += parseInt(ar[1]) * 60;
if (ar[2]) time += parseInt(ar[2]) * 60 * 60;
//calculate the progress
progress = Math.round((time/duration) * 100);
}
result.status = 200;
result.duration = duration;
result.current = time;
result.progress = progress;
console.log(result);
/* UPDATE YOUR PROGRESSBAR HERE with above values ... */
if(progress==0 && i>20){
// TODO err - giving up after 8 sec. no progress - handle progress errors here
console.log('{"status":-400, "error":"there is no progress while we tried to encode the video" }');
return;
} else if(progress<100){
setTimeout(function(){ _progress(i); }, 400);
}
} else if( content.indexOf('Permission denied') > -1) {
// TODO - err - ffmpeg is not executable ...
console.log('{"status":-400, "error":"ffmpeg : Permission denied, either for ffmpeg or upload location ..." }');
}
},
function(err){
// AJAX error
if(i<20){
// retry
setTimeout(function(){ _progress(0); }, 400);
} else {
console.log('{"status":-400, "error":"there is no progress while we tried to encode the video" }');
console.log( err );
}
return;
});
}
setTimeout(function(){ _progress(0); }, 800);