It is e.g. legal for an ISOBMFF avcc to contain zero parameter sets.
In this case the annex B that we produce would be empty and therefore
useless. This happens e.g. with mov/frag_overlap.mp4 from the
FATE-suite.
Signed-off-by: Andreas Rheinhardt <andreas.rheinha...@outlook.com>
---
Maybe check for the number of units to write instead?
libavcodec/cbs.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/libavcodec/cbs.c b/libavcodec/cbs.c
index 07ae658a4c..8d6e3c3442 100644
--- a/libavcodec/cbs.c
+++ b/libavcodec/cbs.c
@@ -438,6 +438,10 @@ int ff_cbs_write_extradata(CodedBitstreamContext *ctx,
return err;
av_freep(&par->extradata);
+ par->extradata_size = 0;
+
+ if (!frag->data_size)
+ return 0;
par->extradata = av_malloc(frag->data_size +
AV_INPUT_BUFFER_PADDING_SIZE);
--
2.34.1
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