add note on packet loss

2024-02-01 18:06:47 +01:00
parent 25ae4fa72e
commit 2a55a7048f
3 changed files with 15 additions and 0 deletions
@@ -149,6 +149,21 @@ Every 8-10s
 There are some other strings in the APK ending in `-$$` which decode to other ips/hostnames.
 ## Other stuff
 These little cameras have quite some packet loss - I _tried_ to deal with it by splicing around it on the JPEG payloads, but it's probably wrong, I expected artifacts like this:
 ![](pics/packet_loss_good.jpg?raw=true)
 but most of the time got:
 ![](pics/packet_loss_bad.jpg?raw=true)
 which _moves_ the rest of the image, causing more visual noise.
 For now, images on which there was packet loss get skipped. The algorithm to "fix" packet loss can be enabled as an option.
 ## Reversing
 The interesting implementation is in `libvdp.so`, part of the apk bundle.