extract_chapter_regions()

std::vector< FileRegion > MayaFlux::IO::FFmpegDemuxContext::extract_chapter_regions

(

)

const

Extract chapter information as FileRegion entries.

Returns

Vector of FileRegion with type="chapter".

Definition at line 178 of file FFmpegDemuxContext.cpp.

{
    std::vector<FileRegion> regions;
    if (!format_context)
        return regions;
 
    for (unsigned i = 0; i < format_context->nb_chapters; ++i) {
        const AVChapter* ch = format_context->chapters[i];
        FileRegion r;
        r.type = "chapter";
        r.name = "chapter_" + std::to_string(i);
 
        AVDictionaryEntry* title = av_dict_get(ch->metadata, "title", nullptr, 0);
        if (title)
            r.name = title->value;
 
        double tb = av_q2d(ch->time_base);
        r.start_coordinates = { static_cast<uint64_t>(ch->start * tb * 1000) };
        r.end_coordinates = { static_cast<uint64_t>(ch->end * tb * 1000) };
        r.attributes["chapter_index"] = static_cast<int>(i);
 
        regions.push_back(std::move(r));
    }
    return regions;
}

References MayaFlux::IO::FileRegion::attributes, MayaFlux::IO::FileRegion::end_coordinates, format_context, MayaFlux::IO::FileRegion::name, MayaFlux::IO::FileRegion::start_coordinates, and MayaFlux::IO::FileRegion::type.