Treat escaped braces as literal in AssSubtitle.dialogue

av/subtitles/subtitle.py

@@ -294,8 +294,9 @@ def dialogue(self):
         Extract the plain text from the ASS dialogue line.
 
         Override tags and comments (``{...}`` blocks) are removed, ``\\N``
-        becomes a newline, and ``\\n`` and ``\\h`` become a space. A ``{``
-        with no closing ``}`` is kept as literal text.
+        becomes a newline, ``\\n`` and ``\\h`` become a space, and ``\\{``
+        and ``\\}`` become literal braces. A ``{`` with no closing ``}`` is
+        kept as literal text.
         """
         ass_text: bytes = self.ass
         text_len: cython.Py_ssize_t = len(ass_text)
@@ -325,6 +326,10 @@ def dialogue(self):
                     result.append(b" "[0])
                     i += 2
                     continue
+                if char == b"\\"[0] and (next_char == b"{"[0] or next_char == b"}"[0]):
+                    result.append(next_char)
+                    i += 2
+                    continue
                 if char == b"{"[0] and i < last_close:
                     in_block = True
                 else:

scripts/ffmpeg-8.1.json

@@ -1,3 +1,3 @@
 {
-    "url": "https://github.com/PyAV-Org/pyav-ffmpeg/releases/download/8.1.2-1/ffmpeg-{platform}.tar.gz"
+    "url": "https://github.com/PyAV-Org/pyav-ffmpeg/releases/download/8.1.3-1/ffmpeg-{platform}.tar.gz"
 }

scripts/ffmpeg-latest.json

@@ -1,3 +1,3 @@
 {
-    "url": "https://github.com/PyAV-Org/pyav-ffmpeg/releases/download/9.0.2-1/ffmpeg-{platform}.tar.gz"
+    "url": "https://github.com/PyAV-Org/pyav-ffmpeg/releases/download/9.0.2-4/ffmpeg-{platform}.tar.gz"
 }

tests/test_subtitles.py

@@ -171,6 +171,9 @@ def dialogue(text: bytes) -> bytes:
         assert dialogue(prefix + b"a\\Nb") == b"a\nb"
         assert dialogue(prefix + b"a\\nb") == b"a b"
         assert dialogue(prefix + b"a\\hb") == b"a b"
+        # Escaped braces are literal and don't open a block.
+        assert dialogue(prefix + b"a\\{b\\}c") == b"a{b}c"
+        assert dialogue(prefix + b"\\{x{\\i1}y") == b"{xy"
         # A stray '{' with no closing '}' is literal text.
         assert dialogue(prefix + b"cost is {5") == b"cost is {5"
         # Commas in the Text field are kept.