@@ -37,6 +37,7 @@ typedef struct CDXLDemuxContext {

     uint8_t     header[CDXL_HEADER_SIZE];

     int         video_stream_index;

     int         audio_stream_index;

+    int64_t     filesize;

 } CDXLDemuxContext;

 static int cdxl_read_probe(AVProbeData *p)

@@ -96,6 +97,8 @@ static int cdxl_read_header(AVFormatContext *s)

     cdxl->video_stream_index = -1;

     cdxl->audio_stream_index = -1;

+    cdxl->filesize = avio_size(s->pb);

+

     s->ctx_flags |= AVFMTCTX_NOHEADER;

     return 0;

@@ -108,7 +111,7 @@ static int cdxl_read_packet(AVFormatContext *s, AVPacket *pkt)

     uint32_t current_size, video_size, image_size;

     uint16_t audio_size, palette_size, width, height;

     int64_t  pos;

-    int      ret;

+    int      frames, ret;

     if (avio_feof(pb))

         return AVERROR_EOF;

@@ -175,6 +178,15 @@ static int cdxl_read_packet(AVFormatContext *s, AVPacket *pkt)

             st->codec->codec_id      = AV_CODEC_ID_CDXL;

             st->codec->width         = width;

             st->codec->height        = height;

+

+            if (audio_size + video_size && cdxl->filesize > 0) {

+                frames = cdxl->filesize / (audio_size + video_size);

+

+                if(cdxl->framerate)

+                    st->duration = frames;

+                else

+                    st->duration = frames * audio_size;

+            }

             st->start_time           = 0;

             cdxl->video_stream_index = st->index;

             if (cdxl->framerate)