+ if ( st->codec->bit_rate > 0 && data_size > 0
+ && st->codec->sample_rate > 0
+ && sample_count > 0 && st->codec->channels > 1
+ && sample_count % st->codec->channels == 0) {
+ if (fabs(8.0 * data_size * st->codec->channels * st->codec->sample_rate /
+ sample_count /st->codec->bit_rate - 1.0) < 0.3)
+ sample_count /= st->codec->channels;
+ }
+