diff --git a/ffmpeg.c b/ffmpeg.c
index 5c6a94fba5..cef7e425d1 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -2959,7 +2959,11 @@ static int transcode_init(void)
         }
 
         if (ost->stream_copy) {
-            uint64_t extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
+            uint64_t extra_size;
+
+            av_assert0(ist && !ost->filter);
+
+            extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
 
             if (extra_size > INT_MAX) {
                 return AVERROR(EINVAL);
@@ -4893,6 +4897,13 @@ static void init_output_filter(OutputFilter *ofilter, OptionsContext *o,
 
     ofilter->ost      = ost;
 
+    if (ost->stream_copy) {
+        av_log(NULL, AV_LOG_ERROR, "Streamcopy requested for output stream %d:%d, "
+               "which is fed from a complex filtergraph. Filtering and streamcopy "
+               "cannot be used together.\n", ost->file_index, ost->index);
+        exit_program(1);
+    }
+
     if (configure_output_filter(ofilter->graph, ofilter, ofilter->out_tmp) < 0) {
         av_log(NULL, AV_LOG_FATAL, "Error configuring filter.\n");
         exit_program(1);
diff --git a/libavformat/isom.c b/libavformat/isom.c
index 34daeaeeeb..44ec507770 100644
--- a/libavformat/isom.c
+++ b/libavformat/isom.c
@@ -245,7 +245,9 @@ const AVCodecTag ff_codec_movaudio_tags[] = {
     { CODEC_ID_ALAC,            MKTAG('a', 'l', 'a', 'c') },
     { CODEC_ID_AMR_NB,          MKTAG('s', 'a', 'm', 'r') }, /* AMR-NB 3gp */
     { CODEC_ID_AMR_WB,          MKTAG('s', 'a', 'w', 'b') }, /* AMR-WB 3gp */
-    { CODEC_ID_DTS,             MKTAG('d', 't', 's', 'c') }, /* mp4ra.org */
+    { CODEC_ID_DTS,             MKTAG('d', 't', 's', 'c') }, /* DTS formats prior to DTS-HD */
+    { CODEC_ID_DTS,             MKTAG('d', 't', 's', 'h') }, /* DTS-HD audio formats */
+    { CODEC_ID_DTS,             MKTAG('d', 't', 's', 'l') }, /* DTS-HD Lossless formats */
     { CODEC_ID_DTS,             MKTAG('D', 'T', 'S', ' ') }, /* non-standard */
     { CODEC_ID_DVAUDIO,         MKTAG('v', 'd', 'v', 'a') },
     { CODEC_ID_DVAUDIO,         MKTAG('d', 'v', 'c', 'a') },