[FFmpeg-devel] [PATCH] lavc/ac3_parser: avoid zeroing codec parameters if we haven't parsed a frame

[Rodger Combs]

This caused issues when seeking in some unusual MPEGTS files
---
 libavcodec/aac_ac3_parser.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libavcodec/aac_ac3_parser.c b/libavcodec/aac_ac3_parser.c
index 2f7d568..b01d5a5 100644
--- a/libavcodec/aac_ac3_parser.c
+++ b/libavcodec/aac_ac3_parser.c
@@ -34,6 +34,7 @@ int ff_aac_ac3_parse(AVCodecParserContext *s1,
     ParseContext *pc = &s->pc;
     int len, i;
     int new_frame_start;
+    int got_frame = 0;
 
 get_next:
     i=END_NOT_FOUND;
@@ -51,6 +52,7 @@ get_next:
             if(len<=0){
                 i=END_NOT_FOUND;
             }else{
+                got_frame = 1;
                 s->state=0;
                 i-= s->header_size -1;
                 s->remaining_size = len;
@@ -80,7 +82,7 @@ get_next:
        and total number of samples found in an AAC ADTS header are not
        reliable. Bit rate is still accurate because the total frame duration in
        seconds is still correct (as is the number of bits in the frame). */
-    if (avctx->codec_id != AV_CODEC_ID_AAC) {
+    if (avctx->codec_id != AV_CODEC_ID_AAC && got_frame) {
         avctx->sample_rate = s->sample_rate;
 
         /* (E-)AC-3: allow downmixing to stereo or mono */
-- 
2.6.3