WP FFMPEG Transcoder .mov to .mp4

custom-transcoder.php

<?php
/**
 * Plugin Name: Custom Transcoder (WP Cron + Attachment Update + Email + UI Button)
 */

// 1. Schedule transcoding on MOV upload
add_filter('wp_handle_upload', function($upload) {
    $ext = strtolower(wp_check_filetype($upload['file'])['ext']);
    if ($ext !== 'mov') return $upload;
    wp_schedule_single_event(time() + 10, 'custom_transcoder_convert_mov', [$upload]);
    return $upload;
});

// 2. Cron job: Convert MOV to MP4 with improved FFmpeg args
add_action('custom_transcoder_convert_mov', function($upload) {
    if (empty($upload['file']) || !file_exists($upload['file'])) {
        error_log('[Transcoder] File not found');
        custom_transcoder_send_email('fail', $upload['file'], 'File not found.');
        return;
    }

    $original = $upload['file'];
    $path = pathinfo($original);
    $mp4 = $path['dirname'] . '/' . $path['filename'] . '.mp4';

    $cmd = "ffmpeg -y -i " . escapeshellarg($original) .
           " -map 0:v:0 -map 0:a:0 -c copy -movflags +faststart " .
           escapeshellarg($mp4) . " 2>&1";

    error_log('[Transcoder] Running: ' . $cmd);
    exec($cmd, $out, $code);

    if ($code !== 0 || !file_exists($mp4) || filesize($mp4) < 1000) {
        error_log('[Transcoder] FFmpeg failed: ' . implode("\n", $out));
        custom_transcoder_send_email('fail', $original, implode("\n", $out));
        return;
    }

    global $wpdb;

    // Update media library
    $attachment_id = attachment_url_to_postid($upload['url']);
    if ($attachment_id) {
        update_attached_file($attachment_id, $mp4);

        // ✅ Ensure required media functions are loaded
        if (!function_exists('wp_generate_attachment_metadata')) {
            require_once ABSPATH . 'wp-admin/includes/image.php';
        }
        if (!function_exists('wp_read_video_metadata')) {
            require_once ABSPATH . 'wp-admin/includes/media.php';
        }

        wp_update_post([
            'ID' => $attachment_id,
            'post_mime_type' => 'video/mp4',
        ]);
        $meta = wp_generate_attachment_metadata($attachment_id, $mp4);
        if (!empty($meta)) wp_update_attachment_metadata($attachment_id, $meta);

        // ✅ Also update GUID directly to .mp4
        $mp4_url = str_replace('.mov', '.mp4', $upload['url']);
        $wpdb->update(
            $wpdb->posts,
            ['guid' => $mp4_url],
            ['ID' => $attachment_id]
        );
        error_log("[Transcoder] Updated wp_posts.guid for attachment ID $attachment_id");
    }

    // ✅ Update rtMedia <video src="..."> in activity feed
    $mov_basename = basename($upload['url']);
    $mp4_basename = basename($mp4);
    $like = '%' . $mov_basename . '%';

    $activities = $wpdb->get_results($wpdb->prepare(
        "SELECT id, content FROM {$wpdb->prefix}bp_activity WHERE type = 'rtmedia_update' AND content LIKE %s",
        $like
    ));

    foreach ($activities as $activity) {
        $new_content = str_replace($mov_basename, $mp4_basename, $activity->content);
        $wpdb->update(
            "{$wpdb->prefix}bp_activity",
            ['content' => $new_content],
            ['id' => $activity->id]
        );
        error_log("[Transcoder] Updated bp_activity ID {$activity->id} video src to .mp4");
    }

    unlink($original);
    error_log('[Transcoder] Success: ' . $mp4);
    custom_transcoder_send_email('success', $mp4);
});

// 3. Update metadata post-transcode for existing attachments (fallback only)
add_action('add_attachment', function($post_ID) {
    $file = get_attached_file($post_ID);
    if (!$file || strtolower(pathinfo($file, PATHINFO_EXTENSION)) !== 'mov') return;

    $mp4 = preg_replace('/\.mov$/i', '.mp4', $file);
    if (!file_exists($mp4)) return;

    update_attached_file($post_ID, $mp4);

    if (!function_exists('wp_generate_attachment_metadata')) {
        require_once ABSPATH . 'wp-admin/includes/image.php';
    }
    if (!function_exists('wp_read_video_metadata')) {
        require_once ABSPATH . 'wp-admin/includes/media.php';
    }

    wp_update_post([
        'ID' => $post_ID,
        'post_mime_type' => 'video/mp4',
    ]);
    $meta = wp_generate_attachment_metadata($post_ID, $mp4);
    if (!empty($meta)) wp_update_attachment_metadata($post_ID, $meta);

    // Also update guid
    global $wpdb;
    $wpdb->update(
        $wpdb->posts,
        ['guid' => str_replace('.mov', '.mp4', wp_get_attachment_url($post_ID))],
        ['ID' => $post_ID]
    );
});

// 4. Email notification
function custom_transcoder_send_email($status, $file, $details = '') {
    $subj = $status === 'success' ? '✅ Video Transcoded' : '❌ Transcoding Failed';
    $body = "File: $file\n\n" . ($status === 'success' ? "Transcoding completed successfully." : "Transcoding failed.\n\nDetails:\n$details");
    wp_mail('[email protected]', $subj, $body);
}

// 5. "Transcode Now" button in media editor
add_filter('attachment_fields_to_edit', function($fields, $post) {
    $file = get_attached_file($post->ID);
    if (!$file || strtolower(pathinfo($file, PATHINFO_EXTENSION)) !== 'mov') return $fields;

    $nonce = wp_create_nonce('retranscode_' . $post->ID);
    $fields['retranscode'] = [
        'label' => 'Custom Transcoder',
        'input' => 'html',
        'html' => '<button type="button" class="button retranscode-mov-button" data-attachment="' . esc_attr($post->ID) . '" data-nonce="' . esc_attr($nonce) . '">Transcode Now</button>' .
                  '<span class="retranscode-status" style="margin-left:10px;"></span>',
    ];
    return $fields;
}, 10, 2);

// 6. Handle AJAX trigger
add_action('wp_ajax_custom_transcoder_retranscode', function() {
    if (!current_user_can('upload_files')) wp_send_json_error(['message' => 'Permission denied.']);

    $id = intval($_POST['attachment_id'] ?? 0);
    $nonce = $_POST['nonce'] ?? '';
    if (!wp_verify_nonce($nonce, 'retranscode_' . $id)) wp_send_json_error(['message' => 'Invalid nonce.']);
    if (!get_post($id)) wp_send_json_error(['message' => 'Attachment not found.']);

    $file = get_attached_file($id);
    if (!$file || strtolower(pathinfo($file, PATHINFO_EXTENSION)) !== 'mov') {
        wp_send_json_error(['message' => 'Not a .mov file or file not found.']);
    }

    wp_schedule_single_event(time() + 5, 'custom_transcoder_convert_mov', [[
        'file' => $file,
        'type' => get_post_mime_type($id),
        'url' => wp_get_attachment_url($id),
    ]]);

    wp_send_json_success(['message' => 'Transcoding job scheduled.']);
});

// 7. Inject JS into media screen
add_action('admin_footer', function() {
    $screen = get_current_screen();
    if (!$screen || !in_array($screen->id, ['upload', 'media'])) return;
    ?>
<script>
jQuery(document).on('click', '.retranscode-mov-button', function () {
    const $btn = jQuery(this);
    const id = $btn.data('attachment');
    const nonce = $btn.data('nonce');
    const $status = $btn.siblings('.retranscode-status');

    $status.text('Scheduling...');
    jQuery.post(ajaxurl, {
        action: 'custom_transcoder_retranscode',
        attachment_id: id,
        nonce: nonce,
    }).done(r => {
        $status.text(r.data.message || 'Scheduled.');
    }).fail(xhr => {
        const msg = xhr.responseJSON?.data?.message || 'Error.';
        $status.text('Failed: ' + msg);
    });
});
</script>
<?php
});