avformat/movenc: handle OOM situations when parsing AC-3 headers

Signed-off-by: Jan Ekström <jan.ekstrom@24i.com>

libavformat/movenc.c

@@ -416,7 +416,10 @@ static int handle_eac3(MOVMuxContext *mov, AVPacket *pkt, MOVTrack *track)
     if (!info->pkt && !(info->pkt = av_packet_alloc()))
         return AVERROR(ENOMEM);
 
-    if (avpriv_ac3_parse_header(&hdr, pkt->data, pkt->size) < 0) {
+    if ((ret = avpriv_ac3_parse_header(&hdr, pkt->data, pkt->size) < 0)) {
+        if (ret == AVERROR(ENOMEM))
+            goto end;
+
         /* drop the packets until we see a good one */
         if (!track->entry) {
             av_log(mov->fc, AV_LOG_WARNING, "Dropping invalid packet from start of the stream\n");