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diff --git a/libavformat/mpegtsenc.c b/libavformat/mpegtsenc.c
index 468bad4..8c0987c 100644
--- a/libavformat/mpegtsenc.c
+++ b/libavformat/mpegtsenc.c
@@ -852,12 +852,9 @@ static int mpegts_write_header(AVFormatContext *s)
ts_st = pcr_st->priv_data;
if (ts->mux_rate > 1) {
- service->pcr_packet_period = (ts->mux_rate * ts->pcr_period) /
- (TS_PACKET_SIZE * 8 * 1000);
- ts->sdt_packet_period = (ts->mux_rate * SDT_RETRANS_TIME) /
- (TS_PACKET_SIZE * 8 * 1000);
- ts->pat_packet_period = (ts->mux_rate * PAT_RETRANS_TIME) /
- (TS_PACKET_SIZE * 8 * 1000);
+ service->pcr_packet_period = av_rescale(ts->pcr_period, ts->mux_rate, TS_PACKET_SIZE * 8 * 1000);
+ ts->sdt_packet_period = av_rescale(SDT_RETRANS_TIME, ts->mux_rate, TS_PACKET_SIZE * 8 * 1000);
+ ts->pat_packet_period = av_rescale(PAT_RETRANS_TIME, ts->mux_rate, TS_PACKET_SIZE * 8 * 1000);
if (ts->copyts < 1)
ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
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