@@ -151,6 +151,10 @@ Disable sequence end tag.

 @item no_metadata

 Disable metadata tag.

+@item no_duration_filesize

+Disable duration and filesize in metadata when they are equal to zero

+at the end of stream. (Be used to non-seekable living stream).

+

 @item add_keyframe_index

 Used to facilitate seeking; particularly for HTTP pseudo streaming.

 @end table

@@ -68,6 +68,7 @@ typedef enum {

     FLV_NO_SEQUENCE_END = (1 << 1),

     FLV_ADD_KEYFRAME_INDEX = (1 << 2),

     FLV_NO_METADATA = (1 << 3),

+    FLV_NO_DURATION_FILESIZE = (1 << 4),

 } FLVFlags;

 typedef struct FLVFileposition {

@@ -269,6 +270,7 @@ static void write_metadata(AVFormatContext *s, unsigned int ts)

 {

     AVIOContext *pb = s->pb;

     FLVContext *flv = s->priv_data;

+    int write_duration_filesize = !(flv->flags & FLV_NO_DURATION_FILESIZE);

     int metadata_count = 0;

     int64_t metadata_count_pos;

     AVDictionaryEntry *tag = NULL;

@@ -292,12 +294,12 @@ static void write_metadata(AVFormatContext *s, unsigned int ts)

     metadata_count = 4 * !!flv->video_par +

                      5 * !!flv->audio_par +

                      1 * !!flv->data_par;

-    if (pb->seekable) {

+    if (write_duration_filesize) {

         metadata_count += 2; // +2 for duration and file size

     }

     avio_wb32(pb, metadata_count);

-    if (pb->seekable) {

+    if (write_duration_filesize) {

         put_amf_string(pb, "duration");

         flv->duration_offset = avio_tell(pb);

         // fill in the guessed duration, it'll be corrected later if incorrect

@@ -378,7 +380,7 @@ static void write_metadata(AVFormatContext *s, unsigned int ts)

         metadata_count++;

     }

-    if (pb->seekable) {

+    if (write_duration_filesize) {

         put_amf_string(pb, "filesize");

         flv->filesize_offset = avio_tell(pb);

         put_amf_double(pb, 0); // delayed write

@@ -844,7 +846,7 @@ end:

         avio_seek(pb, flv->datasize_offset, SEEK_SET);

         put_amf_double(pb, flv->datasize);

     }

-    if (pb->seekable) {

+    if (!(flv->flags & FLV_NO_DURATION_FILESIZE)) {

         /* update information */

         if (avio_seek(pb, flv->duration_offset, SEEK_SET) < 0) {

             av_log(s, AV_LOG_WARNING, "Failed to update header with correct duration.\n");

@@ -1061,6 +1063,7 @@ static const AVOption options[] = {

     { "aac_seq_header_detect", "Put AAC sequence header based on stream data", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_AAC_SEQ_HEADER_DETECT}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },

     { "no_sequence_end", "disable sequence end for FLV", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_NO_SEQUENCE_END}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },

     { "no_metadata", "disable metadata for FLV", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_NO_METADATA}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },

+    { "no_duration_filesize", "disable duration and filesize zero value metadata for FLV", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_NO_DURATION_FILESIZE}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },

     { "add_keyframe_index", "Add keyframe index metadata", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_ADD_KEYFRAME_INDEX}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },

     { NULL },

 };