Allows to process CENC-encrypted media segments.
Option arg syntax is same as that for option decryption_key in MOV demuxer
---
doc/demuxers.texi | 11 +++++++++++
libavformat/dashdec.c | 5 +++++
2 files changed, 16 insertions(+)
diff --git a/doc/demuxers.texi b/doc/demuxers.texi
index 238b8e03a8..c95a9ae594 100644
--- a/doc/demuxers.texi
+++ b/doc/demuxers.texi
@@ -274,6 +274,17 @@ which streams to actually receive.
Each stream mirrors the @code{id} and @code{bandwidth} properties from the
@code{<Representation>} as metadata keys named "id" and "variant_bitrate"
respectively.
+@subsection Options
+
+This demuxer accepts the following option:
+
+@table @option
+
+@item cenc_decryption_key
+16-byte key, in hex, to decrypt files encrypted using ISO Common Encryption
(CENC/AES-128 CTR; ISO/IEC 23001-7).
+
+@end table
+
@section imf
Interoperable Master Format demuxer.
diff --git a/libavformat/dashdec.c b/libavformat/dashdec.c
index 0b5ff5aeb9..0f66251354 100644
--- a/libavformat/dashdec.c
+++ b/libavformat/dashdec.c
@@ -150,6 +150,7 @@ typedef struct DASHContext {
char *allowed_extensions;
AVDictionary *avio_opts;
int max_url_size;
+ char *cenc_decryption_key;
/* Flags for init section*/
int is_init_section_common_video;
@@ -1893,6 +1894,9 @@ static int reopen_demux_for_component(AVFormatContext *s,
struct representation
pls->ctx->pb = &pls->pb.pub;
pls->ctx->io_open = nested_io_open;
+ if (c->cenc_decryption_key)
+ av_dict_set(&in_fmt_opts, "decryption_key", c->cenc_decryption_key,
AV_OPT_FLAG_DECODING_PARAM);
+
// provide additional information from mpd if available
ret = avformat_open_input(&pls->ctx, "", in_fmt, &in_fmt_opts);
//pls->init_section->url
av_dict_free(&in_fmt_opts);
@@ -2344,6 +2348,7 @@ static const AVOption dash_options[] = {
OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
{.str = "aac,m4a,m4s,m4v,mov,mp4,webm,ts"},
INT_MIN, INT_MAX, FLAGS},
+ { "cenc_decryption_key", "Media decryption key (hex)",
OFFSET(cenc_decryption_key), AV_OPT_TYPE_STRING, {.str = NULL}, INT_MIN, INT_MAX, .flags = FLAGS },
{NULL}
};
--
2.36.1
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