fftools/ffmpeg_filter: remove sws_param option from buffersrc

The option is deprecated and ignored by buffersrc.

fftools/ffmpeg_filter.c

@@ -786,10 +786,9 @@ static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
     av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
     av_bprintf(&args,
              "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
-             "pixel_aspect=%d/%d:sws_param=flags=%d",
+             "pixel_aspect=%d/%d",
              ifilter->width, ifilter->height, ifilter->format,
-             tb.num, tb.den, sar.num, sar.den,
-             SWS_BILINEAR + ((ist->dec_ctx->flags&AV_CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
+             tb.num, tb.den, sar.num, sar.den);
     if (fr.num && fr.den)
         av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
     snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,