596     av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den,  in av_guess_sample_aspect_ratio()
597                stream_sample_aspect_ratio.num,  stream_sample_aspect_ratio.den, INT_MAX);  in av_guess_sample_aspect_ratio()
598     if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0)  in av_guess_sample_aspect_ratio()
601     av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den,  in av_guess_sample_aspect_ratio()
602                frame_sample_aspect_ratio.num,  frame_sample_aspect_ratio.den, INT_MAX);  in av_guess_sample_aspect_ratio()
603     if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0)  in av_guess_sample_aspect_ratio()
619     if (avg_fr.num > 0 && avg_fr.den > 0 && fr.num > 0 && fr.den > 0 &&  in av_guess_frame_rate()
625         if (   codec_fr.num > 0 && codec_fr.den > 0 &&  in av_guess_frame_rate()
654             enc_ctx->time_base.num = ist->r_frame_rate.den;  in avformat_transfer_internal_stream_timing_info()
655             enc_ctx->time_base.den = 2*ist->r_frame_rate.num;  in avformat_transfer_internal_stream_timing_info()
664             enc_ctx->time_base.den *= 2;  in avformat_transfer_internal_stream_timing_info()
669         if (copy_tb == AVFMT_TBCF_AUTO && dec_ctx->time_base.den  in avformat_transfer_internal_stream_timing_info()
679         && dec_ctx->time_base.num < dec_ctx->time_base.den  in avformat_transfer_internal_stream_timing_info()
681         && 121LL*dec_ctx->time_base.num > dec_ctx->time_base.den) {  in avformat_transfer_internal_stream_timing_info()
685     av_reduce(&enc_ctx->time_base.num, &enc_ctx->time_base.den,  in avformat_transfer_internal_stream_timing_info()
686               enc_ctx->time_base.num, enc_ctx->time_base.den, INT_MAX);  in avformat_transfer_internal_stream_timing_info()
702     if (av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)) {  in avpriv_set_pts_info()
711     if (new_tb.num <= 0 || new_tb.den <= 0) {  in avpriv_set_pts_info()
714                new_tb.num, new_tb.den,  in avpriv_set_pts_info()