This error means the device you're using is decoding video into a format that Parsec doesn't understand.
Whoever developed the ROM for your device did not implement MediaCodec correctly, and it's returning 0 as its pixelformat, meaning we're unable to correctly process the image.
MediaCodec is a standard Android API, and we rely on your ROM correctly conforming to standard Android APIs. To fix this, you'll need to consult your Android ROM developer.
You need to change Parsec's settings > Client > Decoder Mode to Software.