c->picref = avfilter_get_video_buffer(outlink, AV_PERM_WRITE,
picref->video->w, picref->video->h);
av_image_copy(c->picref->data, c->picref->linesize,
c->picref = avfilter_get_video_buffer(outlink, AV_PERM_WRITE,
picref->video->w, picref->video->h);
av_image_copy(c->picref->data, c->picref->linesize,