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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 d8f10623d2..a6cd7304e8 100644
--- a/DOCS/tech/mpcf.txt
+++ b/DOCS/tech/mpcf.txt
@@ -448,6 +448,8 @@ time_base_nom / time_base_denom = time_base
30 1 30
29.97 1001 30000
23.976 1001 24000
+ There MUST NOT be 2 identical timebases in a file.
+ There SHOULD NOT be more timebases than streams.
time_base_id
id to time_base table