+static double adjust_frame_pts_to_encoder_tb(OutputFile *of, OutputStream *ost,
+ AVFrame *frame)
+{
+ double float_pts = AV_NOPTS_VALUE; // this is identical to frame.pts but with higher precision
+ AVCodecContext *enc = ost->enc_ctx;
+ if (!frame || frame->pts == AV_NOPTS_VALUE ||
+ !enc || !ost->filter || !ost->filter->graph->graph)
+ goto early_exit;
+
+ {
+ AVFilterContext *filter = ost->filter->filter;
+
+ int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time;
+ AVRational filter_tb = av_buffersink_get_time_base(filter);
+ AVRational tb = enc->time_base;
+ int extra_bits = av_clip(29 - av_log2(tb.den), 0, 16);
+
+ tb.den <<= extra_bits;
+ float_pts =
+ av_rescale_q(frame->pts, filter_tb, tb) -
+ av_rescale_q(start_time, AV_TIME_BASE_Q, tb);
+ float_pts /= 1 << extra_bits;
+ // avoid exact midoints to reduce the chance of rounding differences, this can be removed in case the fps code is changed to work with integers
+ float_pts += FFSIGN(float_pts) * 1.0 / (1<<17);
+
+ frame->pts =
+ av_rescale_q(frame->pts, filter_tb, enc->time_base) -
+ av_rescale_q(start_time, AV_TIME_BASE_Q, enc->time_base);
+ }
+
+early_exit:
+
+ if (debug_ts) {
+ av_log(NULL, AV_LOG_INFO, "filter -> pts:%s pts_time:%s exact:%f time_base:%d/%d\n",
+ frame ? av_ts2str(frame->pts) : "NULL",
+ frame ? av_ts2timestr(frame->pts, &enc->time_base) : "NULL",
+ float_pts,
+ enc ? enc->time_base.num : -1,
+ enc ? enc->time_base.den : -1);
+ }
+
+ return float_pts;
+}
+
+static int init_output_stream(OutputStream *ost, AVFrame *frame,
+ char *error, int error_len);
+
+static int init_output_stream_wrapper(OutputStream *ost, AVFrame *frame,
+ unsigned int fatal)
+{
+ int ret = AVERROR_BUG;
+ char error[1024] = {0};
+
+ if (ost->initialized)
+ return 0;
+
+ ret = init_output_stream(ost, frame, error, sizeof(error));
+ if (ret < 0) {
+ av_log(NULL, AV_LOG_ERROR, "Error initializing output stream %d:%d -- %s\n",
+ ost->file_index, ost->index, error);
+
+ if (fatal)
+ exit_program(1);
+ }
+
+ return ret;
+}
+