X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Favidec.c;h=b8a31dcff28755afab071ce811ecb46b85c9d80c;hb=e00e8639b22a06b77ada2b906a4b1ccdb373adc1;hp=4e694fe447fd0bccbf2779551d530f1efa2f8e5e;hpb=42ed79a2294ca08e3902bd92003d4ccd9cf464ef;p=ffmpeg

diff --git a/libavformat/avidec.c b/libavformat/avidec.c
index 4e694fe447f..b8a31dcff28 100644
--- a/libavformat/avidec.c
+++ b/libavformat/avidec.c
@@ -727,7 +727,8 @@ FF_ENABLE_DEPRECATION_WARNINGS
             break;
         case MKTAG('s', 't', 'r', 'f'):
             /* stream header */
-            if (!size)
+            if (!size && (codec_type == AVMEDIA_TYPE_AUDIO ||
+                          codec_type == AVMEDIA_TYPE_VIDEO))
                 break;
             if (stream_index >= (unsigned)s->nb_streams || avi->dv_demux) {
                 avio_skip(pb, size);
@@ -1098,6 +1099,9 @@ static int read_gab2_sub(AVFormatContext *s, AVStream *st, AVPacket *pkt)
         if (!sub_demuxer)
             goto error;
 
+        if (strcmp(sub_demuxer->name, "srt") && strcmp(sub_demuxer->name, "ass"))
+            goto error;
+
         if (!(ast->sub_ctx = avformat_alloc_context()))
             goto error;
 
@@ -1120,7 +1124,7 @@ static int read_gab2_sub(AVFormatContext *s, AVStream *st, AVPacket *pkt)
 
 error:
         av_freep(&ast->sub_ctx);
-        av_freep(&pb);
+        avio_context_free(&pb);
     }
     return 0;
 }
@@ -1261,19 +1265,6 @@ start_sync:
                 }
             }
 
-            if (!avi->dv_demux &&
-                ((st->discard >= AVDISCARD_DEFAULT && size == 0) /* ||
-                 // FIXME: needs a little reordering
-                 (st->discard >= AVDISCARD_NONKEY &&
-                 !(pkt->flags & AV_PKT_FLAG_KEY)) */
-                || st->discard >= AVDISCARD_ALL)) {
-                if (!exit_early) {
-                    ast->frame_offset += get_duration(ast, size);
-                    avio_skip(pb, size);
-                    goto start_sync;
-                }
-            }
-
             if (d[2] == 'p' && d[3] == 'c' && size <= 4 * 256 + 4) {
                 int k    = avio_r8(pb);
                 int last = (k + avio_r8(pb) - 1) & 0xFF;
@@ -1300,6 +1291,18 @@ start_sync:
                     ast->prefix_count = 0;
                 }
 
+                if (!avi->dv_demux &&
+                    ((st->discard >= AVDISCARD_DEFAULT && size == 0) /* ||
+                        // FIXME: needs a little reordering
+                        (st->discard >= AVDISCARD_NONKEY &&
+                        !(pkt->flags & AV_PKT_FLAG_KEY)) */
+                    || st->discard >= AVDISCARD_ALL)) {
+
+                    ast->frame_offset += get_duration(ast, size);
+                    avio_skip(pb, size);
+                    goto start_sync;
+                }
+
                 avi->stream_index = n;
                 ast->packet_size  = size + 8;
                 ast->remaining    = size;