- const TextContext *text = avctx->priv_data;
- const int ts_start = av_rescale_q(avpkt->pts, avctx->time_base, (AVRational){1,100});
- const int ts_duration = avpkt->duration != -1 ?
- av_rescale_q(avpkt->duration, avctx->time_base, (AVRational){1,100}) : -1;