2

我从 Android 到我的 php 服务器的流式视频有问题。无论我使用什么播放器，我都无法播放我的视频，因为 moov atom 丢失了。我按照Mattakis的教程流式传输我的视频和一个小 php 脚本来重新编码收到的 3gp 视频的标题。

安卓端：

s = new Socket("192.168.1.5", 6000);
        ParcelFileDescriptor pfd= ParcelFileDescriptor.fromSocket(s);
        recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
        recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
        recorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
        recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
        recorder.setVideoEncodingBitRate(512 * 1000);
        recorder.setVideoFrameRate(30);
        recorder.setVideoSize(320, 240);
        recorder.setOutputFile(pfd.getFileDescriptor());

Php 脚本：我在此链接的第三次更新中使用了该脚本

代码 ：

 #!/usr/bin/php5
<?php


    $socket = stream_socket_server("tcp://192.168.0.102:9000", $errno, $errstr);  

 $file = "saved.3gp";

$threegp_header = "\x00\x00\x00\x18\x66\x74\x79\x70\x33\x67\x70\x34\x00\x00\x03\x00\x33\x67\x70\x34\x33\x67\x70\x36";
 $four_bytes = "\x00\x00\x00\x00";
if (!$socket) {

echo "$errstr ($errno)\n";

} else {

echo "server start listening\n";

while ( $conn = @stream_socket_accept($socket, 180))
{
    echo "phone connected\n";

    $handle = fopen($file,"w");

    //mediaRecorder gives invalid stream header, so I replace it discarding first 32 
    byte, replacing with 28 good byte (standard 3gp header plus 4 empty bytes)
    $discard = stream_get_contents($conn, 32);
    fwrite($handle, $threegp_header);
    fwrite($handle, $four_bytes);

    //then confinue to write stream on file until phone stop streaming
    while(!feof($conn))
    {
        fwrite($handle, stream_get_contents($conn, 1500));
    }
    echo "phone disconnected\n";
    fclose($handle);

    //then i had to update 3gp header (bytes 25 to 28) with the offset where moov atom 
    starts
    $handle = fopen($file,"c"); 
    $output = shell_exec('grep -aobE "moov" '.$file);
    $moov_pos = preg_replace('/moov:(\d+)/i', '\\1', $output);
    $moov_pos_ex = strtoupper(str_pad(dechex($moov_pos - 24), 8, "0", STR_PAD_LEFT));
    fwrite($handle, $threegp_header);
    $tmp = '';
    foreach(str_split($moov_pos_ex,2) as $hex)
    {
        $tmp .= pack('C*', hexdec($hex));
    }
    fwrite($handle, $tmp);
    fclose($handle);


}
echo "phone disconnected\n";


 }
 @fclose($handle);
 fclose($socket);
 ?>

我还尝试在保存整个文件后手动重新编码标题，但它不起作用。

4

0 回答 0