Merge pull request #12642 from Stypox/fireos-SAF

Fix initial numbering of frames in TTML to SRT converter

app/src/main/java/org/schabi/newpipe/settings/NewPipeSettings.java

@@ -103,12 +103,12 @@ public final class NewPipeSettings {
     }
 
     public static boolean useStorageAccessFramework(final Context context) {
-        // There's a FireOS bug which prevents SAF open/close dialogs from being confirmed with a
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
-        // remote (see #6455).
-        if (DeviceUtils.isFireTv()) {
-            return false;
-        } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
             return true;
+        } else if (DeviceUtils.isFireTv()) {
+            // There's a FireOS bug which prevents SAF open/close dialogs from being confirmed with
+            // a remote (see #6455).
+            return false;
         }
 
         final String key = context.getString(R.string.storage_use_saf);

app/src/main/java/org/schabi/newpipe/streams/SrtFromTtmlWriter.java

@@ -24,7 +24,11 @@ public class SrtFromTtmlWriter {
     private final boolean ignoreEmptyFrames;
     private final Charset charset = StandardCharsets.UTF_8;
 
-    private int frameIndex = 0;
+    // According to the SubRip (.srt) specification, subtitle
+    // numbering must start from 1.
+    // Some players accept 0 or even negative indices,
+    // but to ensure compliance we start at 1.
+    private int frameIndex = 1;
 
     public SrtFromTtmlWriter(final SharpStream out, final boolean ignoreEmptyFrames) {
         this.out = out;
@@ -39,7 +43,8 @@ public class SrtFromTtmlWriter {
 
     private void writeFrame(final String begin, final String end, final StringBuilder text)
             throws IOException {
-        writeString(String.valueOf(frameIndex++));
+        writeString(String.valueOf(frameIndex));
+        frameIndex += 1;
         writeString(NEW_LINE);
         writeString(begin);
         writeString(" --> ");