extract_container_metadata()

void MayaFlux::IO::FFmpegDemuxContext::extract_container_metadata

(

FileMetadata &

out_metadata

)

const

Extract container-level metadata tags into a FileMetadata attributes map.

Parameters

out_metadata

Target metadata struct; attributes field is populated.

Definition at line 158 of file FFmpegDemuxContext.cpp.

{
    if (!format_context)
        return;
 
    out.format = format_context->iformat->name;
    out.mime_type = format_context->iformat->mime_type
        ? format_context->iformat->mime_type
        : "application/" + std::string(format_context->iformat->name);
 
    if (format_context->duration != AV_NOPTS_VALUE)
        out.attributes["duration_seconds"] = (double)format_context->duration / static_cast<double>(AV_TIME_BASE);
 
    out.attributes["bit_rate"] = static_cast<int64_t>(format_context->bit_rate);
 
    AVDictionaryEntry* tag = nullptr;
    while ((tag = av_dict_get(format_context->metadata, "", tag, AV_DICT_IGNORE_SUFFIX)))
        out.attributes[std::string("tag_") + tag->key] = std::string(tag->value);
}

References MayaFlux::IO::FileMetadata::attributes, MayaFlux::IO::FileMetadata::format, format_context, and MayaFlux::IO::FileMetadata::mime_type.