From 9c69552c192e67484d62a20aea277fa85fa31753 Mon Sep 17 00:00:00 2001
From: Daniel Neto <me@danielneto.com>
Date: Thu, 16 Jan 2025 13:11:33 -0300
Subject: [PATCH] Now the MP4 and MP3 files if is automatic, is processed In
 the encoder for HLS files only

---
 objects/Encoder.php      |  2 +-
 objects/Format.php       |  2 +-
 objects/HLSProcessor.php | 28 ++++++++++++++
 objects/MP3Processor.php | 33 +++++++++++++++++
 objects/MP4Processor.php | 79 ++++++++++++++++++++++++++++++++++++++++
 5 files changed, 142 insertions(+), 2 deletions(-)
 create mode 100644 objects/MP3Processor.php
 create mode 100644 objects/MP4Processor.php

diff --git a/objects/Encoder.php b/objects/Encoder.php
index 9d0b5e16..9116a2d5 100644
--- a/objects/Encoder.php
+++ b/objects/Encoder.php
@@ -1259,7 +1259,7 @@ static function canEncodeNow()
 
     public static function run($try = 0)
     {
-        global $global;
+        global $global, $advancedCustom;
         $maxTries = 4;
         $lockFile = sys_get_temp_dir() . '/encoder_run.lock';
 
diff --git a/objects/Format.php b/objects/Format.php
index 8e689135..bc2f1fd5 100644
--- a/objects/Format.php
+++ b/objects/Format.php
@@ -113,7 +113,7 @@ protected static function getFromOrder($order)
             }
             return $row;
         }
-
+        
         public function run($pathFileName, $encoder_queue_id)
         {
             _error_log("AVideo-Encoder Format::run($pathFileName, $encoder_queue_id) " . json_encode(debug_backtrace()));
diff --git a/objects/HLSProcessor.php b/objects/HLSProcessor.php
index 705a713b..1cacf91d 100644
--- a/objects/HLSProcessor.php
+++ b/objects/HLSProcessor.php
@@ -2,6 +2,32 @@
 
 class HLSProcessor
 {
+
+    static function createMP3AndPM4IfNeed($pathFileName, $destinationFile){
+        global $global;
+        
+        $advancedCustom = getAdvancedCustomizedObjectData();
+        //_error_log('createMP3AndPM4IfNeed '.json_encode($advancedCustom));
+        if($advancedCustom->autoConvertToMp4){
+            require_once __DIR__.'/MP4Processor.php';
+            try {
+                MP4Processor::createMP4($pathFileName, $destinationFile.'index.mp4');
+            } catch (Exception $e) {
+                _error_log("Error creating MP4: " . $e->getMessage());
+            }
+            
+        }
+        if($advancedCustom->autoConvertVideosToMP3){
+            require_once __DIR__.'/MP3Processor.php';
+            // Usage example
+            try {
+                MP3Processor::createMP3($pathFileName, $destinationFile.'index.mp3');
+            } catch (Exception $e) {
+                _error_log("Error creating MP3: " . $e->getMessage());
+            }
+        }
+    }
+
     public static function createHLSWithAudioTracks($pathFileName, $destinationFile)
     {
         // Detect video resolution and audio tracks
@@ -44,6 +70,8 @@ public static function createHLSWithAudioTracks($pathFileName, $destinationFile)
         $masterPlaylist = "#EXTM3U" . PHP_EOL;
         $masterPlaylist .= "#EXT-X-VERSION:3" . PHP_EOL;
 
+        self::createMP3AndPM4IfNeed($pathFileName, $destinationFile);
+
         // Generate separate audio-only HLS streams for each audio track
         foreach ($audioTracks as $key => $track) {
             $language = isset($track->language) ? $track->language : "lang" . ($track->index + 1); // Assign language name, customize as needed
diff --git a/objects/MP3Processor.php b/objects/MP3Processor.php
new file mode 100644
index 00000000..7153d0e2
--- /dev/null
+++ b/objects/MP3Processor.php
@@ -0,0 +1,33 @@
+<?php
+
+class MP3Processor
+{
+    public static function createMP3($pathFileName, $destinationFile)
+    {
+        // Define encoding settings for MP3
+        $audioBitrate = 128; // Set a standard bitrate for MP3 encoding
+
+        // Generate the FFmpeg command for creating an MP3 file
+        $command = self::generateFFmpegCommand($pathFileName, $destinationFile, $audioBitrate);
+
+        // Execute the FFmpeg command
+        _error_log("MP3Processor: Executing FFmpeg command: $command");
+        exec($command, $output, $resultCode);
+
+        if ($resultCode !== 0) {
+            _error_log("MP3Processor: FFmpeg failed with output: " . json_encode($output));
+            throw new Exception("Failed to create MP3 file.");
+        }
+
+        _error_log("MP3Processor: MP3 file created successfully at $destinationFile");
+    }
+
+    private static function generateFFmpegCommand($inputFile, $outputFile, $audioBitrate)
+    {
+        $ffmpeg = get_ffmpeg() . " -i $inputFile " .
+            "-vn -c:a libmp3lame -b:a {$audioBitrate}k " .
+            "-movflags +faststart " .
+            "$outputFile";
+        return removeUserAgentIfNotURL($ffmpeg);
+    }
+}
diff --git a/objects/MP4Processor.php b/objects/MP4Processor.php
new file mode 100644
index 00000000..d8a11f06
--- /dev/null
+++ b/objects/MP4Processor.php
@@ -0,0 +1,79 @@
+<?php
+
+class MP4Processor
+{
+    public static function createMP4($pathFileName, $destinationFile)
+    {
+        // Get allowed resolutions from Format::ENCODING_SETTINGS
+        $allowedResolutions = array_keys(Format::ENCODING_SETTINGS);
+
+        // Get the resolution of the input file
+        $inputResolution = self::getResolution($pathFileName);
+
+        // Determine the target resolution
+        $targetResolution = self::getClosestResolution($inputResolution, $allowedResolutions);
+
+        if ($targetResolution === null) {
+            throw new Exception("No valid resolution found for the input file.");
+        }
+
+        // Load encoding settings for the target resolution
+        $encodingSettings = Format::ENCODING_SETTINGS[$targetResolution];
+
+        // Create the FFmpeg command
+        $command = self::generateFFmpegCommand(
+            $pathFileName,
+            $destinationFile,
+            $targetResolution,
+            $encodingSettings
+        );
+
+        // Execute the FFmpeg command
+        _error_log("MP4Processor: Executing FFmpeg command: $command");
+        exec($command, $output, $resultCode);
+
+        if ($resultCode !== 0) {
+            _error_log("MP4Processor: FFmpeg failed with output: " . json_encode($output));
+            throw new Exception("Failed to create MP4 file.");
+        }
+
+        _error_log("MP4Processor: MP4 file created successfully at $destinationFile");
+    }
+
+    private static function getResolution($pathFileName)
+    {
+        $command = get_ffprobe() . " -v error -select_streams v:0 -show_entries stream=height -of csv=p=0 $pathFileName";
+        return (int) shell_exec($command);
+    }
+
+    private static function getClosestResolution($inputResolution, $allowedResolutions)
+    {
+        // Sort resolutions in descending order
+        rsort($allowedResolutions);
+
+        foreach ($allowedResolutions as $resolution) {
+            if ($inputResolution >= $resolution) {
+                return $resolution;
+            }
+        }
+
+        // Return the lowest resolution if no match found
+        return $allowedResolutions[count($allowedResolutions) - 1] ?? null;
+    }
+
+    private static function generateFFmpegCommand($inputFile, $outputFile, $resolution, $encodingSettings)
+    {
+        $ffmpeg = get_ffmpeg() . " -i $inputFile " .
+            "-vf scale=-2:$resolution " .
+            "-b:v {$encodingSettings['maxrate']}k " .
+            "-minrate {$encodingSettings['minrate']}k " .
+            "-maxrate {$encodingSettings['maxrate']}k " .
+            "-bufsize {$encodingSettings['bufsize']}k " .
+            "-c:v h264 -pix_fmt yuv420p " .
+            "-c:a aac -b:a {$encodingSettings['audioBitrate']}k " .
+            "-movflags +faststart " .
+            "$outputFile";
+            
+        return removeUserAgentIfNotURL($ffmpeg);
+    }
+}
\ No newline at end of file