basesink: handle empty buffer list more gracefully

Don't abort, just ignore it. It's like a buffer
without memories.

1 files changed, 12 insertions, 1 deletions

diff --git a/libs/gst/base/gstbasesink.c b/libs/gst/base/gstbasesink.c
index 14c2371b2..a50569577 100644
--- a/libs/gst/base/gstbasesink.c
+++ b/libs/gst/base/gstbasesink.c
@@ -3296,7 +3296,12 @@ gst_base_sink_chain_unlocked (GstBaseSink * basesink, GstPad * pad,
     goto was_eos;
 
   if (is_list) {
-    sync_buf = gst_buffer_list_get (GST_BUFFER_LIST_CAST (obj), 0);
+    GstBufferList *buffer_list = GST_BUFFER_LIST_CAST (obj);
+
+    if (gst_buffer_list_length (buffer_list) == 0)
+      goto empty_list;
+
+    sync_buf = gst_buffer_list_get (buffer_list, 0);
     g_assert (NULL != sync_buf);
   } else {
     sync_buf = GST_BUFFER_CAST (obj);
@@ -3478,6 +3483,12 @@ was_eos:
     gst_mini_object_unref (GST_MINI_OBJECT_CAST (obj));
     return GST_FLOW_EOS;
   }
+empty_list:
+  {
+    GST_DEBUG_OBJECT (basesink, "buffer list with no buffers");
+    gst_mini_object_unref (GST_MINI_OBJECT_CAST (obj));
+    return GST_FLOW_OK;
+  }
 out_of_segment:
   {
     GST_DEBUG_OBJECT (basesink, "dropping buffer, out of clipping segment");