@@ -171,11 +171,12 @@ int avfilter_config_links(AVFilterContext *filter)

 static void dprintf_picref(void *ctx, AVFilterPicRef *picref, int end)

 {

     dprintf(ctx,

-            "picref[%p data[%p, %p, %p, %p] linesize[%d, %d, %d, %d] pts:%"PRId64" a:%d/%d s:%dx%d]%s",

+            "picref[%p data[%p, %p, %p, %p] linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64" a:%d/%d s:%dx%d]%s",

             picref,

             picref->data    [0], picref->data    [1], picref->data    [2], picref->data    [3],

             picref->linesize[0], picref->linesize[1], picref->linesize[2], picref->linesize[3],

-            picref->pts, picref->pixel_aspect.num, picref->pixel_aspect.den, picref->w, picref->h,

+            picref->pts, picref->pos,

+            picref->pixel_aspect.num, picref->pixel_aspect.den, picref->w, picref->h,

             end ? "\n" : "");

 }

@@ -263,6 +264,7 @@ void avfilter_start_frame(AVFilterLink *link, AVFilterPicRef *picref)

         link->cur_pic = avfilter_default_get_video_buffer(link, dst->min_perms, link->w, link->h);

         link->srcpic = picref;

         link->cur_pic->pts = link->srcpic->pts;

+        link->cur_pic->pos = link->srcpic->pos;

         link->cur_pic->pixel_aspect = link->srcpic->pixel_aspect;

     }

     else

@@ -105,6 +105,7 @@ typedef struct AVFilterPicRef

     int h;                      ///< image height

     int64_t pts;                ///< presentation timestamp in units of 1/AV_TIME_BASE

+    int64_t pos;                ///< byte position in stream, -1 if unknown

     AVRational pixel_aspect;    ///< pixel aspect ratio

@@ -74,6 +74,7 @@ void avfilter_default_start_frame(AVFilterLink *link, AVFilterPicRef *picref)

     if(out) {

         out->outpic      = avfilter_get_video_buffer(out, AV_PERM_WRITE, out->w, out->h);

         out->outpic->pts = picref->pts;

+        out->outpic->pos = picref->pos;

         out->outpic->pixel_aspect = picref->pixel_aspect;

         avfilter_start_frame(out, avfilter_ref_pic(out->outpic, ~0));

     }