Signed-off-by: Josh de Kock <j...@itanimul.li>
---
libavformat/mpegts.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/libavformat/mpegts.c b/libavformat/mpegts.c
index 590abb0..bcf2118 100644
--- a/libavformat/mpegts.c
+++ b/libavformat/mpegts.c
@@ -1718,6 +1718,11 @@ int ff_parse_mpeg2_descriptor(AVFormatContext *fc,
AVStream *st, int stream_type
case 0x56: /* DVB teletext descriptor */
{
uint8_t *extradata = NULL;
+ /* 5 bytes per DVB teletext substream data:
+ * ISO_639_language_code (3 bytes),
+ * teletext_type (5 bits),
+ * teletext_magazine_number (3 bits),
+ * teletext_page_number (1 byte) */
int language_count = desc_len / 5;
if (desc_len > 0 && desc_len % 5 != 0)
@@ -1745,6 +1750,7 @@ int ff_parse_mpeg2_descriptor(AVFormatContext *fc,
AVStream *st, int stream_type
language[i * 4 + 3] = ',';
memcpy(extradata, *pp, 2);
+ /* The page number which libzvbi will output is
extradata[0] & 7 * 256 + extradata[1] */
extradata += 2;
*pp += 2;
--
2.10.1 (Apple Git-78)
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