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-rw-r--r--DOCS/tech/mpcf.txt2
1 files changed, 2 insertions, 0 deletions
diff --git a/DOCS/tech/mpcf.txt b/DOCS/tech/mpcf.txt
index 62a653ea8f..716db2b508 100644
--- a/DOCS/tech/mpcf.txt
+++ b/DOCS/tech/mpcf.txt
@@ -792,6 +792,8 @@ It often highly improves usability and is therefore strongly encouraged.
A demuxer MUST NOT demux a stream which contains more than one stream, or which
is wrapped in a structure to facilitate more than one stream or otherwise
duplicate the role of a container. any such file is to be considered invalid.
+for example vorbis in ogg in nut is invalid, as is
+mpegvideo+mpegaudio in mpeg-ps/ts in nut or dvvideo + dvaudio in dv in nut