fix(previews): ffprobe hangs

Signed-off-by: Andrey Dyakov <adduxa@gmail.com>

Author: adduxa

lib/private/Preview/Movie.php

@@ -289,39 +289,9 @@ private function useHdr(string $absPath): bool {
 		if ($test_hdr_proc === false) {
 			return false;
 		}
-
-		stream_set_blocking($test_hdr_pipes[1], false);
-		stream_set_blocking($test_hdr_pipes[2], false);
-
-		$test_hdr_stdout = '';
-		$test_hdr_stderr = '';
-
-		while (!feof($test_hdr_pipes[1]) || !feof($test_hdr_pipes[2])) {
-			$read = array_filter([
-				!feof($test_hdr_pipes[1]) ? $test_hdr_pipes[1] : null,
-				!feof($test_hdr_pipes[2]) ? $test_hdr_pipes[2] : null,
-			]);
-			$write = $except = [];
-			if (stream_select($read, $write, $except, 5) === false) {
-				break;
-			}
-			foreach ($read as $pipe) {
-				$chunk = fread($pipe, 8192);
-				if ($chunk === false) continue;
-				if ($pipe === $test_hdr_pipes[1]) {
-					$test_hdr_stdout .= $chunk;
-				} else {
-					$test_hdr_stderr .= $chunk;
-				}
-			}
-		}
-
-		fclose($test_hdr_pipes[1]);
-		fclose($test_hdr_pipes[2]);
+		$test_hdr_stderr = trim(stream_get_contents($test_hdr_pipes[2]));
+		$test_hdr_stdout = trim(stream_get_contents($test_hdr_pipes[1]));
 		proc_close($test_hdr_proc);
-
-		$test_hdr_stdout = trim($test_hdr_stdout);
-		$test_hdr_stderr = trim($test_hdr_stderr);
 		// search build options for libzimg (provides zscale filter)
 		$ffmpeg_libzimg_installed = strpos($test_hdr_stderr, '--enable-libzimg');
 		// Only values of "smpte2084" and "arib-std-b67" indicate an HDR video.