WIP

extract-playlist.php

@@ -377,15 +377,11 @@ function extractFragmentedMP4( $filename ) {
                             $max_pts = max( $max_pts, $pts + $sample_duration );
                             $dts += $sample_duration;
                         }
-                        echo "$first_pts - $max_pts\n";
                     }
                 ],
             ] );
         },
         'mdat' => function ( $box ) use ( &$segments, &$moof, &$first_pts, &$max_pts, &$timescale ) {
-            var_dump( $first_pts );
-            var_dump( $max_pts );
-            var_dump( $timescale );
             array_push( $segments, [
                 'start' => $moof,
                 'size' => $box->end() - $moof,
@@ -398,6 +394,53 @@ function extractFragmentedMP4( $filename ) {
     return $segments;
 }
 
+function consolidate( $target, $segments ) {
+    $out = [
+        'init' => $segments['init'],
+    ];
+    $n = count( $segments ) - 1;
+    $start = $segments[0]['start'];
+    $size = $segments[0]['size'];
+    $timestamp = $segments[0]['timestamp'];
+    $duration = $segments[0]['duration'];
+    $i = 1;
+    while ( $i < $n ) {
+        // Append segments until we get close
+        while ( $i < $n && $duration < $target ) {
+            $total = $duration + $segments[$i]['duration'];
+            if ( $total > $target ) {
+                $after = $total - $target;
+                $before = $target - $duration;
+                if ( $before < $after ) {
+                    // Break segment early
+                    break;
+                }
+            }
+            $duration += $segments[$i]['duration'];
+            $size += $segments[$i]['size'];
+            $i++;
+        }
+
+        // Save out a segment
+        $out[] = [
+            'start' => $start,
+            'size' => $size,
+            'timestamp' => $timestamp,
+            'duration' => $duration,
+        ];
+
+        if ( $i < $n ) {
+            $segment = $segments[$i];
+            $start = $segment['start'];
+            $size = $segment['size'];
+            $timestamp = $segment['timestamp'];
+            $duration = $segment['duration'];
+            $i++;
+        }
+    }
+    return $out;
+}
+
 function playlist( $filename, $segments ) {
     /*
     #EXTM3U
@@ -433,7 +476,6 @@ function playlist( $filename, $segments ) {
     $init = $segments['init'] ?? false;
     if ( $init ) {
         $lines[] = "#EXT-X-MAP:URI=\"$filename\",BYTERANGE=\"{$init['size']}@{$init['start']}\"";
-        $lines[] = $filename;
     }
 
     $n = count( $segments ) - 1;
@@ -451,7 +493,7 @@ $argv = $_SERVER['argv'];
 $self = array_shift( $argv );
 $filename = array_shift( $argv );
 $segments = extractFragmentedMP4( $filename );
-//var_dump( $segments );
+$segments = consolidate( 10, $segments );
 
 /*
 foreach ( $segments as $key => $segment ) {