diff --git a/doc/APIchanges b/doc/APIchanges
index 395083c091..da369f4275 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -15,6 +15,10 @@ libavutil:     2012-10-22
 
 API changes, most recent first:
 
+2014-05-24 - xxxxxxx - lavf 55.19.0 - avformat.h
+  Add strict_std_compliance and related AVOptions to support experimental
+  muxing.
+
 2014-05-26 - xxxxxxx - lavu 52.87.100 - threadmessage.h
   Add thread message queue API.
 
diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index 2103f50e57..01c3b75c37 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -1423,6 +1423,12 @@ typedef struct AVFormatContext {
      */
     int64_t max_interleave_delta;
 
+    /**
+     * Allow non-standard and experimental extension
+     * @see AVCodecContext.strict_std_compliance
+     */
+    int strict_std_compliance;
+
     /**
      * Transport stream id.
      * This will be moved into demuxer private options. Thus no API/ABI compatibility
diff --git a/libavformat/options_table.h b/libavformat/options_table.h
index e9bee619c9..069edee0d6 100644
--- a/libavformat/options_table.h
+++ b/libavformat/options_table.h
@@ -89,6 +89,11 @@ static const AVOption avformat_options[] = {
 {"metadata_header_padding", "set number of bytes to be written as padding in a metadata header", OFFSET(metadata_header_padding), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, E},
 {"output_ts_offset", "set output timestamp offset", OFFSET(output_ts_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, -INT64_MAX, INT64_MAX, E},
 {"max_interleave_delta", "maximum buffering duration for interleaving", OFFSET(max_interleave_delta), AV_OPT_TYPE_INT64, { .i64 = 10000000 }, 0, INT64_MAX, E },
+{"f_strict", "how strictly to follow the standards (deprecated; use strict, save via avconv)", OFFSET(strict_std_compliance), AV_OPT_TYPE_INT, {.i64 = DEFAULT }, INT_MIN, INT_MAX, D|E, "strict"},
+{"strict", "how strictly to follow the standards", OFFSET(strict_std_compliance), AV_OPT_TYPE_INT, {.i64 = DEFAULT }, INT_MIN, INT_MAX, D|E, "strict"},
+{"strict", "strictly conform to all the things in the spec no matter what the consequences", 0, AV_OPT_TYPE_CONST, {.i64 = FF_COMPLIANCE_STRICT }, INT_MIN, INT_MAX, D|E, "strict"},
+{"normal", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = FF_COMPLIANCE_NORMAL }, INT_MIN, INT_MAX, D|E, "strict"},
+{"experimental", "allow non-standardized experimental variants", 0, AV_OPT_TYPE_CONST, {.i64 = FF_COMPLIANCE_EXPERIMENTAL }, INT_MIN, INT_MAX, D|E, "strict"},
 {NULL},
 };
 
diff --git a/libavformat/version.h b/libavformat/version.h
index 84d49103cb..6f7aa7d31e 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -30,7 +30,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVFORMAT_VERSION_MAJOR 55
-#define LIBAVFORMAT_VERSION_MINOR 41
+#define LIBAVFORMAT_VERSION_MINOR 42
 #define LIBAVFORMAT_VERSION_MICRO 100
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \