diff --git a/README.md b/README.md
index 93f6fcc3..9b165ac3 100644
--- a/README.md
+++ b/README.md
@@ -571,6 +571,7 @@ Mandatory fields:
 	an empty captions file (useful in case only some videos in a playlist have captions)
 
 Optional fields:
+* `id` - a string that identifies the source clip
 * `sourceType` - sets the interface that should be used to read the MP4 file, allowed values are:
 	`file` and `http`. By default, the module uses `http` if `vod_remote_upstream_location` is set,
 	and `file` otherwise.
diff --git a/ngx_http_vod_module.c b/ngx_http_vod_module.c
index d9304c67..57fceedf 100644
--- a/ngx_http_vod_module.c
+++ b/ngx_http_vod_module.c
@@ -456,8 +456,10 @@ ngx_http_vod_set_sequence_id_var(ngx_http_request_t *r, ngx_http_variable_value_
 static ngx_int_t
 ngx_http_vod_set_clip_id_var(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data)
 {
+	media_clip_source_t* clip_source;
 	ngx_http_vod_ctx_t *ctx;
 	media_clip_t* cur_clip;
+	media_set_t* media_set;
 	ngx_str_t* value;
 
 	ctx = ngx_http_get_module_ctx(r, ngx_http_vod_module);
@@ -469,13 +471,29 @@ ngx_http_vod_set_clip_id_var(ngx_http_request_t *r, ngx_http_variable_value_t *v
 	cur_clip = ctx->cur_clip;
 	if (cur_clip == NULL)
 	{
-		goto not_found;
+		media_set = &ctx->submodule_context.media_set;
+		if (media_set->sequence_count == 1 && media_set->clip_count == 1)
+		{
+			cur_clip = media_set->sequences->clips[0];
+		}
+		else
+		{
+			goto not_found;
+		}
 	}
 
 	switch (cur_clip->type)
 	{
 	case MEDIA_CLIP_SOURCE:
-		value = &((media_clip_source_t*)cur_clip)->mapped_uri;
+		clip_source = (media_clip_source_t*)cur_clip;
+		if (clip_source->id.len != 0)
+		{
+			value = &clip_source->id;
+		}
+		else
+		{
+			value = &clip_source->mapped_uri;
+		}
 		break;
 
 	case MEDIA_CLIP_DYNAMIC:
diff --git a/vod/media_clip.h b/vod/media_clip.h
index 6fe34886..2a9e8f30 100644
--- a/vod/media_clip.h
+++ b/vod/media_clip.h
@@ -74,6 +74,7 @@ struct media_clip_source_s {
 	// TODO: the fields below are not required for generators, consider adding another struct
 
 	// input params
+	vod_str_t id;
 	media_clip_source_type_t source_type;
 	vod_str_t uri;				// original uri
 	uint64_t clip_from;
diff --git a/vod/media_set_parser.c b/vod/media_set_parser.c
index a1a0e7ff..81e33b6f 100644
--- a/vod/media_set_parser.c
+++ b/vod/media_set_parser.c
@@ -119,6 +119,7 @@ static json_parser_union_type_def_t media_clip_union_params[] = {
 };
 
 static json_object_value_def_t media_clip_source_params[] = {
+	{ vod_string("id"),			VOD_JSON_STRING,	offsetof(media_clip_source_t, id), media_set_parse_null_term_string },
 	{ vod_string("path"),			VOD_JSON_STRING,	offsetof(media_clip_source_t, mapped_uri), media_set_parse_null_term_string },
 	{ vod_string("tracks"),			VOD_JSON_STRING,	offsetof(media_clip_source_t, tracks_mask), media_set_parse_tracks_spec },
 	{ vod_string("clipFrom"),		VOD_JSON_INT,		offsetof(media_clip_source_t, clip_from), media_set_parse_int64 },