diff --git a/NVEncCore/rgy_output_avcodec.cpp b/NVEncCore/rgy_output_avcodec.cpp
index a49218ce..f091d6d4 100644
--- a/NVEncCore/rgy_output_avcodec.cpp
+++ b/NVEncCore/rgy_output_avcodec.cpp
@@ -3638,7 +3638,7 @@ RGY_ERR RGYOutputAvcodec::WriteOtherPacket(AVPacket *pkt) {
         //以前のptsより前になりそうになったら修正する
         const auto maxPts = pMuxOther->lastPtsOut + ((m_Mux.format.formatCtx->oformat->flags & AVFMT_TS_NONSTRICT) ? 0 : 1);
         if (pkt->pts < maxPts) {
-            auto loglevel = (maxPts - pkt->pts > 2) ? RGY_LOG_WARN : RGY_LOG_DEBUG;
+            auto loglevel = (maxPts - pkt->pts > 2 && pMuxOther->streamOut->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE /*字幕の場合は頻繁に発生することがある*/) ? RGY_LOG_WARN : RGY_LOG_DEBUG;
             if (loglevel >= m_printMes->getLogLevel(RGY_LOGT_OUT)) {
                 AddMessage(loglevel, _T("Timestamp error in stream %d, previous: %lld, current: %lld [timebase: %d/%d].\n"),
                     pMuxOther->streamOut->index,