ftypM4A M4A mp42isom "moovlmvhdŠCdŠCdX"@!iodsO " trak\tkhdŠCdŠCd"@ !mdia mdhdŠCdŠCdD l"hdlrsoun !_minfsmhd$dinfdref url  !#stblstts~gstsdWmp4a3esds"@ stsz~