AVFilterBufferRef *picref = avfilter_get_video_buffer(link, AV_PERM_WRITE, color->w, color->h);
picref->video->pixel_aspect = (AVRational) {1, 1};
picref->pts = av_rescale_q(color->pts++, color->time_base, AV_TIME_BASE_Q);
AVFilterBufferRef *picref = avfilter_get_video_buffer(link, AV_PERM_WRITE, color->w, color->h);
picref->video->pixel_aspect = (AVRational) {1, 1};
picref->pts = av_rescale_q(color->pts++, color->time_base, AV_TIME_BASE_Q);