static int copy_chapters(InputFile *ifile, OutputFile *ofile, int copy_metadata) { AVFormatContext *is = ifile->ctx; AVFormatContext *os = ofile->ctx; int i; for (i = 0; i < is->nb_chapters; i++) { AVChapter *in_ch = is->chapters[i], *out_ch; int64_t ts_off = av_rescale_q(ofile->start_time - ifile->ts_offset, AV_TIME_BASE_Q, in_ch->time_base); int64_t rt = (ofile->recording_time == INT64_MAX) ? INT64_MAX : av_rescale_q(ofile->recording_time, AV_TIME_BASE_Q, in_ch->time_base); if (in_ch->end < ts_off) continue; if (rt != INT64_MAX && in_ch->start > rt + ts_off) break; out_ch = av_mallocz(sizeof(AVChapter)); if (!out_ch) return AVERROR(ENOMEM); out_ch->id = in_ch->id; out_ch->time_base = in_ch->time_base; out_ch->start = FFMAX(0, in_ch->start - ts_off); out_ch->end = FFMIN(rt, in_ch->end - ts_off); if (copy_metadata) av_dict_copy(&out_ch->metadata, in_ch->metadata, 0); os->nb_chapters++; os->chapters = av_realloc(os->chapters, sizeof(AVChapter) * os->nb_chapters); if (!os->chapters) return AVERROR(ENOMEM); os->chapters[os->nb_chapters - 1] = out_ch; } return 0; }