Decoded UDP stream header for LUMIX WiFi streaming.

description.md

General Header Structure

[0, 1] Packet Size
[2, 30] Unkown Data
[31] camera metadata size
[32, 46] Unkown Data
[47, 48] Indicate the amount of additinal header data (very likely that these are points of the active af mode)

Let imageOffset be 2 + 30 + [31] and metaDataOffset be 2 + 46 + 6 + ((data[47] << 4) + (data[48] >>> 4)).

[imageOffset, metaDataOffset] is the camera Metadata
[metaDataOffset, END] is an jpeg image  

The output of my current processor can be found here.

Camera Metadata

Assuming that metaData is a view from [imageOffset, metaDataOffset]. The first 19 bytes correspond 1:1 to the cam.cgi?mode=getinfo&type=lens data. (The FZ1000 has a base of 256 for all of these values)

[0, 3] Maximal Aperture

maxAperture = (metaData[0] << 8) + metaData[1]
maxApertureBase = (metaData[2] << 8) + metaData[3]

Caluclate f-stop using sqrt(2^(maxAperture/maxApertureBase))

[4, 7] Minimal Aperture

minAperture = (metaData[4] << 8) + metaData[5]
minApertureBase = (metaData[6] << 8) + metaData[7]

Caluclate f-stop using sqrt(2^(minAperture/minApertureBase))

[8, 11] Current Aperture

aperture = (metaData[8] << 8) + metaData[9]
apertureBase = (metaData[10] << 8) + metaData[11]

Caluclate f-stop using sqrt(2^(aperture/apertureBase))

[12, 15] Unkown Lens Value

unkownValue = (metaData[12] << 8) + metaData[13]
unkownValueBase = (metaData[14] << 8) + metaData[15]

[16, 19] Unkown Lens Value 2

unkownValue2 = (metaData[16] << 8) + metaData[17]
unkownValue2Base = (metaData[18] << 8) + metaData[19]

[20, 22] Shutter Speed

shutterSpeedRaw = (metaData[20] << 8) + metaData[21] // Two's Complement
shutterSpeedBase =  metaData[22]
shutterSpeed = round(shutterSpeedRaw / floor(shutterSpeedBase / 3))

shutterSpeed	Meaning
36	4000
35	3200
34	2500
33	2000
32	1600
31	1300
30	1000
29	800
28	640
27	500
26	400
25	320
24	250
23	200
22	160
21	125
20	100
19	80
18	60
17	50
16	40
15	30
14	25
13	20
12	15
11	13
10	10
9	8
8	6
7	5
6	4
5	3.2
4	2.5
3	2
2	1.6
1	1.3
0	1’’
-1	1.3’’
-2	1.6’’
-3	2’’
-4	2.5’’
-5	3.2’’
-6	4’’
-7	5’’
-8	6’’
-9	8’’
-10	10’’
-11	13’’
-12	15’’
-13	20’’
-14	25’’
-15	30’’
-16	40’’
-17	50’’
-18	60’’

[23, 35] Unknown

[36] Exposure Compensation

  exposureCompensation = metaData[36] // Two's Complement

Ranges from -15 .. 15

[37, 38] Zoom Level

  zoomLevel = (metaData[37] << 8) + metaData[38]

[39, 43] Unknown

[44] Mode

  mode = metaData[44]

Value	Meaning
1	P
2	A
3	S
4	M
9	iAutomatic
21	Style Expressiv
22	Style Retro
23	Style High Key
24	Style Low Key
25	Style Sepia
26	Style High Dynamic
27	Style Minuature Effect
28	Style Toy Effect
29	Style Soft Focus
30	Style Dynammic Monochrome
31	Style Impressive Art
32	Style Cross Process
33	Style One Point Color
34	Style Star Filter
60	Film M
101	Style Old Days
102	Style Sunshine
103	Style Bleach Bypass
104	Style Toy Pop
105	Style Fantasy
114	Style Monochrome
110	Style Silky Monochrome
111	Style Rough Monochrome

[45,46] Custom Mode

  customMode = (metaData[45] << 8) + metaData[46]

Value	Meaning
256	C1
2560	C2-1
2816	C2-2
3072	C2-3

[47] Picture Style

  pictureStyle = metaData[47]

Value	Meaning
1	Standard
2	Vivid
3	Natural
4	Monochrome
5	Scenery
6	Portrait
7	Custom
8	CNED
9	CNEV

[48] // Unkown

[49] Flash Style

  flashStyle = metaData[49]

Value	Meaning
1	Off
4	Forced Flash ON
8	Automatic Flash Mode
11	Automatic Flash/Slow Sync
30	Force ON/Red-Eye
31	Slow Sync.
32	Slow Sync/Red-Ey

[50, 52] Unkown

[53] Motion Picture Settings

  motionPitctureSettings = metaData[53]

Value	Meaning
1	AVCHD(1080,60p)
2	AVCHD(1080,60i)
3	AVCHD(1080,30p)
8	AVCHD(1080,24p)
14	MP4(1080,30p)
15	MP4(720,30p)
16	MP4(480,30p)
44	MP4(1080,60p)
46	MP4(2160,30p)
68	MP4(2160,24p)

[54] Unkown

[55] Picture Aspect Ratio

  pictureAspectRatio = metaData[55]

Value	Meaning
5	4:3
6	3:2
7	16:9
8	1:1

[56] Picture Quality

  pictureAspectRatio = metaData[56]

Value	Meaning
1	L
4	M
5	S

[57] Unkown

[58] Picture Quality

  pictureQuality = metaData[58]

Value	Meaning
1	Fine
4	Standard
5	RAW+Standard
4	RAW+Fine
5	RAW

[59] Focus Mode

  focusMode = metaData[59]

Value	Meaning
1	AFS
2	AFF
3	AFC
5	MF

[60] // Unkown

[61] Autofocus Mode

  focusMode = metaData[61]

Value	Meaning
0	Manual
1	1-Area
3	Face/Eye Detection
5	Tracking
7	PinPoint
8	49-Area
11	Custom Multi

[62, 67] // Unkown

[68] Metering Mode

pictureQuality = metaData[68]

Value	Meaning
1	Spot
2	Multi Metering
3	Center Weighted

[69] AF/AE Lock

afAeLock = metaData[69]

Value	Meaning
0	off
1	on

[70] [73] [75, 77] Unkown

[72] [74] [78] Dial Setting State

  dialSettingState = (metaData[72] << 2) + (metaData[74] << 1) + metaData[78]

Value	Meaning
0	None
1	Exposer Correction
2	Shutter Speed
4	Focal Length
6	Shutter Speed & Focal Length

[79] Metering Mode

  meteringMode = metaData[79]

Value	Meaning
0	Auto ISO
4	200
5	250
6	320
7	400
8	500
9	640
10	800
11	1000
12	1256
13	1600
14	2000
15	2500
16	3200
17	4000
18	5000
19	6400
20	8000
22	10000
24	128000
29	iISO
30	125

[80] White Balance

  whiteBalance = metaData[80]

Value	Meaning
0	AWB
1	Unkown
2	Sun
3	Cloud
4	House Shadow
5	Light Bullb
6	Flash WB
7	Custom 1
8	Custom 2
9	Custom 3
10	Custom 4
11	Custom Kelvin

[81, 83] Unkown

[84] Macro Mode

  macroMode = metaData[84]

Value	Meaning
0	Off
1	AF Macro
2	Macro Zoom

[85, 109] Unkown

[110] Burst Mode

  burstMode = metaData[110]

Value	Meaning
0	Off
1	On

ProcessedData.js

{
  "maxfStop": "8.0",
  "minfStop": "2.8",
  "fStop": "2.8",
  "Shutter Speed": "60",
  "Exposure": "0",
  "zoom": 25,
  "mode": "A",
  "customMode": "C2-1",
  "Photo Style": "Standard",
  "Video Rec Quality": "MP4(1920x1080)60p 28Mbps",
  "Aspect Ratio": "3:2",
  "Picture Size": "L 20M",
  "Quality": "Fine",
  "focus_Mode": "AFS",
  "AF Mode": "User Defined",
  "drive_mode": "Single",
  "Metering Mode": "Multi Metering",
  "afAeLock": false,
  "selected_setting": "Aperture",
  "Sensitivity": "i.Auto",
  "White Balance": "Auto White Balance",
  "Macro Mode": "Off",
  "sdAccess": false
}