@@ -150,6 +150,7 @@ typedef struct Stereo3DContext {

     AVFrame *prev;

     int blanks;

     int in_off_left[4], in_off_right[4];

+    AVRational aspect;

     Stereo3DDSPContext dsp;

 } Stereo3DContext;

@@ -359,11 +360,11 @@ static int config_output(AVFilterLink *outlink)

     AVFilterContext *ctx = outlink->src;

     AVFilterLink *inlink = ctx->inputs[0];

     Stereo3DContext *s = ctx->priv;

-    AVRational aspect = inlink->sample_aspect_ratio;

     AVRational fps = inlink->frame_rate;

     AVRational tb = inlink->time_base;

     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format);

     int ret;

+    s->aspect = inlink->sample_aspect_ratio;

     switch (s->in.format) {

     case INTERLEAVE_COLS_LR:

@@ -404,25 +405,25 @@ static int config_output(AVFilterLink *outlink)

     switch (s->in.format) {

     case SIDE_BY_SIDE_2_LR:

-        aspect.num     *= 2;

+        s->aspect.num  *= 2;

     case SIDE_BY_SIDE_LR:

         s->width        = inlink->w / 2;

         s->in.off_right = s->width;

         break;

     case SIDE_BY_SIDE_2_RL:

-        aspect.num     *= 2;

+        s->aspect.num  *= 2;

     case SIDE_BY_SIDE_RL:

         s->width        = inlink->w / 2;

         s->in.off_left  = s->width;

         break;

     case ABOVE_BELOW_2_LR:

-        aspect.den     *= 2;

+        s->aspect.den  *= 2;

     case ABOVE_BELOW_LR:

         s->in.row_right =

         s->height       = inlink->h / 2;

         break;

     case ABOVE_BELOW_2_RL:

-        aspect.den     *= 2;

+        s->aspect.den  *= 2;

     case ABOVE_BELOW_RL:

         s->in.row_left  =

         s->height       = inlink->h / 2;

@@ -486,19 +487,19 @@ static int config_output(AVFilterLink *outlink)

         break;

     }

     case SIDE_BY_SIDE_2_LR:

-        aspect.den      *= 2;

+        s->aspect.den   *= 2;

     case SIDE_BY_SIDE_LR:

         s->out.width     = s->width * 2;

         s->out.off_right = s->width;

         break;

     case SIDE_BY_SIDE_2_RL:

-        aspect.den      *= 2;

+        s->aspect.den   *= 2;

     case SIDE_BY_SIDE_RL:

         s->out.width     = s->width * 2;

         s->out.off_left  = s->width;

         break;

     case ABOVE_BELOW_2_LR:

-        aspect.num      *= 2;

+        s->aspect.num   *= 2;

     case ABOVE_BELOW_LR:

         s->out.height    = s->height * 2;

         s->out.row_right = s->height;

@@ -514,7 +515,7 @@ static int config_output(AVFilterLink *outlink)

         s->out.row_right = s->height + s->blanks;

         break;

     case ABOVE_BELOW_2_RL:

-        aspect.num      *= 2;

+        s->aspect.num   *= 2;

     case ABOVE_BELOW_RL:

         s->out.height    = s->height * 2;

         s->out.row_left  = s->height;

@@ -576,7 +577,7 @@ static int config_output(AVFilterLink *outlink)

     outlink->h = s->out.height;

     outlink->frame_rate = fps;

     outlink->time_base = tb;

-    outlink->sample_aspect_ratio = aspect;

+    outlink->sample_aspect_ratio = s->aspect;

     if ((ret = av_image_fill_linesizes(s->linesize, outlink->format, s->width)) < 0)

         return ret;

@@ -1075,6 +1076,7 @@ copy:

         av_frame_free(&s->prev);

         av_frame_free(&inpicref);

     }

+    out->sample_aspect_ratio = s->aspect;

     return ff_filter_frame(outlink, out);

 }