---
 cmdutils.c |   10 ++++++++++
 cmdutils.h |   13 +++++++++++++
 2 files changed, 23 insertions(+), 0 deletions(-)

diff --git a/cmdutils.c b/cmdutils.c
index 70a7ff4..d126c82 100644
--- a/cmdutils.c
+++ b/cmdutils.c
@@ -234,6 +234,16 @@ unknown_opt:
      * a global var*/
     dst = po->flags & (OPT_OFFSET|OPT_SPEC) ? (uint8_t*)obj + po->u.off : 
po->u.dst_ptr;
 
+    if (po->flags & OPT_SPEC) {
+        SpecifierOpt **so = dst;
+        char *p = strchr(opt, ':');
+
+        dstcount = (int*)(so + 1);
+        *so = grow_array(*so, sizeof(**so), dstcount, *dstcount + 1);
+        (*so)[*dstcount - 1].specifier = av_strdup(p ? p + 1 : "");
+        dst = &(*so)[*dstcount - 1].u;
+    }
+
     if (po->flags & OPT_STRING) {
         char *str;
         str = av_strdup(arg);
diff --git a/cmdutils.h b/cmdutils.h
index 33c5b89..c424301 100644
--- a/cmdutils.h
+++ b/cmdutils.h
@@ -108,6 +108,16 @@ double parse_number_or_die(const char *context, const char 
*numstr, int type, do
  */
 int64_t parse_time_or_die(const char *context, const char *timestr, int 
is_duration);
 
+typedef struct SpecifierOpt {
+    char *specifier;    /**< stream/chapter/program/... specifier */
+    union {
+        uint8_t *str;
+        int        i;
+        int64_t  i64;
+        float      f;
+    } u;
+} SpecifierOpt;
+
 typedef struct {
     const char *name;
     int flags;
@@ -126,6 +136,9 @@ typedef struct {
 #define OPT_DATA   0x1000
 #define OPT_FUNC2  0x2000
 #define OPT_OFFSET 0x4000       /* option is specified as an offset in a 
passed object */
+#define OPT_SPEC   0x8000       /* option is to be stored in an array of 
SpecifierOpt.
+                                   Implies OPT_OFFSET. Next element after the 
offset is
+                                   an int containing element count in the 
array. */
      union {
         void *dst_ptr;
         int (*func_arg)(const char *, const char *);
-- 
1.7.5.4

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