let info = pkt.get_stream().get_info();
if let NACodecTypeInfo::Audio(ainfo) = info.get_properties() {
let duration = get_duration(&ainfo, pkt.get_duration(), pkt.get_buffer().len());
let info = pkt.get_stream().get_info();
if let NACodecTypeInfo::Audio(ainfo) = info.get_properties() {
let duration = get_duration(&ainfo, pkt.get_duration(), pkt.get_buffer().len());