ffmpeg: loose lowres hackery

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

ffmpeg.c

@@ -2294,8 +2294,6 @@ static int transcode(AVFormatContext **output_files,
                 ost->reformat_pair = MAKE_SFMT_PAIR(AV_SAMPLE_FMT_NONE,AV_SAMPLE_FMT_NONE);
                 if (!codec->sample_rate) {
                     codec->sample_rate = icodec->sample_rate;
-                    if (icodec->lowres)
-                        codec->sample_rate >>= icodec->lowres;
                 }
                 choose_sample_rate(ost->st, ost->enc);
                 codec->time_base = (AVRational){1, codec->sample_rate};
@@ -3436,8 +3434,6 @@ static int opt_input_file(const char *opt, const char *filename)
             rfps_base = ic->streams[i]->r_frame_rate.den;
             if (dec->lowres) {
                 dec->flags |= CODEC_FLAG_EMU_EDGE;
-                dec->height >>= dec->lowres;
-                dec->width  >>= dec->lowres;
             }
             if(me_threshold)
                 dec->debug |= FF_DEBUG_MV;