Unable to extract OTA payload files: AppleTV 4K

[kasiimh1]

Hi Trying to extract the OTA bundle get this error:

• Processing OTA payload filename=AssetData/payloadv2/payload.018 size=81 MB • Processing OTA payload filename=AssetData/payloadv2/payload.020 size=82 MB • Processing OTA payload filename=AssetData/payloadv2/payload.016 size=74 MB • Processing OTA payload filename=AssetData/payloadv2/payload.011 size=77 MB • Processing OTA payload filename=AssetData/payloadv2/payload.010 size=64 MB • Processing OTA payload filename=AssetData/payloadv2/payload.017 size=74 MB • Processing OTA payload filename=AssetData/payloadv2/payload.021 size=69 MB • Processing OTA payload filename=AssetData/payloadv2/payload.019 size=77 MB • Processing OTA payload filename=AssetData/payloadv2/payload.004 size=29 MB • Processing OTA payload filename=AssetData/payloadv2/payload.003 size=130 MB ⨯ xz: invalid header magic bytes • Processing OTA payload filename=AssetData/payloadv2/payload.002 size=126 MB ⨯ xz: invalid header magic bytes • Processing OTA payload filename=AssetData/payloadv2/payload.005 size=46 MB • Processing OTA payload filename=AssetData/payloadv2/payload.023 size=16 MB • Processing OTA payload filename=AssetData/payloadv2/payload.024 size=3.7 MB • Processing OTA payload filename=AssetData/payloadv2/payload.012 size=79 MB • Processing OTA payload filename=AssetData/payloadv2/payload.015 size=80 MB • Processing OTA payload filename=AssetData/payloadv2/payload.014 size=81 MB • Processing OTA payload filename=AssetData/payloadv2/payload.013 size=87 MB • Processing OTA payload filename=AssetData/payloadv2/payload.022 size=58 MB • Processing OTA payload filename=AssetData/payloadv2/payload.000 size=172 kB • Processing OTA payload filename=AssetData/payloadv2/payload.007 size=78 MB • Processing OTA payload filename=AssetData/payloadv2/payload.009 size=76 MB • Processing OTA payload filename=AssetData/payloadv2/payload.008 size=79 MB • Processing OTA payload filename=AssetData/payloadv2/payload.006 size=82 MB • Processing OTA payload filename=AssetData/payloadv2/payload.001 size=253 MB

  From what i can tell some payload files do not have XZ data at the start like the rest, they have something before it (like another 
  file).
  
  In payload.002 It has two sets of XZ data with something else before hand.
  
  Also exists on many ATV OTA bundles just different payloads will error because of this.
  
  Example link to OTA: https://updates.cdn-apple.com/2020SummerSeed/patches/061-92077/73A5B815-38F1-4474-812D-F24E5A88575C/com_apple_MobileAsset_SoftwareUpdate/8988ef3518b1f20f95c66d03be3c15eb4e1be2a0.zip