Super project, thanks! But it doesn't work for me. Here is the log:

root@LGwebOSTV:/media/developer/apps/usr/palm/services/org.webosbrew.piccap.service# /media/developer/apps/usr/palm/services/org.webosbrew.piccap.service/hyperion-webos_libvt -a 192.168.1.97 [EGL] Display, major = 1, minor = 4 [EGL] Surface size: 192x108 [EGL] init complete [VT] VT_CreateVideoWindow [VT] window_id=0 [VT] VT_AcquireVideoWindowResource [VT] resource_id=85 [VT] VT_CreateContext [VT] VT_CreateContext Failed

"board_type": "K5LP_DVB", "hardware_id": "HE_DTV_W19P_AFADABAA", "product_id": "60UM7100PLB", "core_os_release": "4.9.0-53904", "webos_manufacturing_version": "05.00.15",

Can I fix it somehow?

My lg tv is rooted and i got the source to compile using the ndk. But when running i get an egl error:

hyperion-webos: /source/src/capture.c:206: egl_init: Assertion `eglGetError() == EGL_SUCCESS' failed.

Also when im skipping the egl part i get the error:

[VT] VT_IsSystemSupported Failed. This TV doesn't support VT.

Maybe you can give me a hint how to debug this and maybe what other api i could try to capture the screen?

Hi,

is there a way to get piccap or hyperion-webos working on webOS 3.4 (OLED E6V from 2016). Unfortunately I get the following error messages with libdile_vt and libvt. The recording resolution doesn't seem to matter.

regards an thanks for the great work Micha

` "board_type": "M16_DVB", "hardware_id": "HE_DTV_W16M_AFADABAA", "product_id": "OLED65E6V-Z", "core_os_release": "3.4.0-6107", "webos_manufacturing_version": "05.60.15",

root@LGwebOSTV:/tmp/hyperion# LD_LIBRARY_PATH=. ./hyperion-webos --address 192.168.0.150 --port 19400 --fps 60 --width 320 --height 240 --backend libvt -S 0.000s [INFO main ] Starting up... 0.018s [INFO capture_preinit ] Preinit called. Copying config.. 0.028s [INFO egl_init ] [EGL] Display, major = 1, minor = 4 0.032s [INFO egl_init ] [EGL] Surface size: 320x240 0.033s [INFO egl_init ] [EGL] init complete 0.034s [INFO capture_init ] [VT] VT_CreateVideoWindow 0.034s [INFO capture_init ] [VT] window_id=0 0.034s [INFO capture_init ] [VT] VT_AcquireVideoWindowResource 5.030s [ ERR capture_init ] [VT] VT_AcquireVideoWindowResource Failed 5.031s [ ERR capture_main ] Error! capture_init: -1 5.031s [ ERR main ] ERROR: Capture main init failed! root@LGwebOSTV:/tmp/hyperion# LD_LIBRARY_PATH=. ./hyperion-webos --address 192.168.0.150 --port 19400 --fps 60 --width 320 --height 240 --backend libdile_vt -S 0.000s [INFO main ] Starting up... 0.006s [INFO capture_preinit ] Preinit called. Copying config.. 0.006s [INFO capture_init ] Init called 0.006s [INFO capture_start ] Capture start called. KADP_DE_SetDHDRInit : Done. 0.068s [WARN capture_start ] DISPLAY dump location failed, attempting SCALER... 0.201s [INFO capture_start ] [DILE_VT] framerate divider: 1 0.301s [INFO capture_start ] [DILE_VT] frametime: 79996; estimated fps before divider: 12.50063 0.341s [INFO capture_start ] [DILE_VT] frametime: 19996; estimated fps after divider: 50.01000 0.341s [INFO capture_start ] [DILE_VT] vfbs: 3; planes: 2 0.342s [INFO capture_start ] [DILE_VT] pixelFormat: 4; width: 320; height: 240; stride: 1920... 0.392s [ ERR capture_main ] Error! capture_start. Code: -12 0.393s [ ERR main ] ERROR: Capture main init failed! root@LGwebOSTV:/tmp/hyperion# `

Hello,

"board_type": "K3LP_DVB",
"hardware_id": "HE_DTV_W17P_AFADABAA",
"product_id": "49UJ630V-ZA",
"core_os_release": "3.9.0-62906",
"webos_manufacturing_version": "06.00.20",

i am a newbie I have downloaded code from this page https://github.com/webosbrew/hyperion-webos/actions/runs/1568099580 Copied all files to tmp/hyperion-webos

But when i try to start it with this

i get

Could you please help me! Thanks!

Platform: LG WebOS 6.2.0-35

When running PicCap with Hyperion, Hyperion becomes unresponsive shortly after launcing PicCap. Log shows:

Mar 19 13:44:55 raspberrypi hyperiond[1737]: malloc(): unsorted double linked list corrupted
Mar 19 13:44:55 raspberrypi hyperiond[1737]: Hyperion caught signal :SIGABRT

Would appreciate your insight on the problem.

"board_type": "M16_DVB",`
"hardware_id": "HE_DTV_W16N_AFADABAA",`
"product_id": "43UH750V-ZA",`
"core_os_release": "3.4.0-5908",`
"webos_manufacturing_version": "05.60.25",

running ./hyperion-webos -b libvt -a 192.168.1.26 -S fail to execute with the following log

0.001s [INFO main                ] Starting up...
     0.017s [INFO capture_preinit     ] Preinit called. Copying config..
     0.030s [INFO egl_init            ] [EGL] Display, major = 1, minor = 4
     0.035s [INFO egl_init            ] [EGL] Surface size: 360x180
     0.036s [INFO egl_init            ] [EGL] init complete
     0.037s [INFO capture_init        ] [VT] VT_CreateVideoWindow
     0.037s [INFO capture_init        ] [VT] window_id=0
     0.038s [INFO capture_init        ] [VT] VT_AcquireVideoWindowResource
     0.038s [INFO capture_init        ] [VT] resource_id=85
     0.038s [INFO capture_init        ] [VT] VT_CreateContext
KADP_DE_SetDHDRInit : Done.
     0.102s [ ERR capture_init        ] [VT] VT_CreateContext Failed
     0.102s [ ERR capture_main        ] Error! capture_init: -1
     0.103s [ ERR main                ] ERROR: Capture main init failed!

I've already tried libdile_vt backend and it stop before that

0.000s [INFO main                ] Starting up...
     0.006s [INFO capture_preinit     ] Preinit called. Copying config..
     0.006s [INFO capture_init        ] Init called
     0.006s [INFO capture_start       ] Capture start called.
KADP_DE_SetDHDRInit : Done.
     0.068s [ ERR capture_main        ] Error! capture_start. Code: -2
     0.069s [ ERR main                ] ERROR: Capture main init failed!

Edit: more info in this comment

Everything works fine while watching tv channels. On HDMI source or any WebOS app like netflix, disney+, prime video or youtube, video received on hyperion server is cropped to the top left corner, see images below (ignore the text overlay that shows up on chromecast when pausing a video):

On the HDMI source HDR is disabled. but the same issue occurs on netflix or any other streaming app that support HDR.

My configuration (piccap):

{
    "returnValue": true,
    "backend": "libdile_vt",
    "port": 19400,
    "width": 192,
    "height": 108,
    "captureUI": true,
    "ip": "192.168.1.201",
    "fps": 0,
    "backmsg": "Settings got successfully!",
    "captureVideo": true,
    "autostart": true
}

Hardware:

"board_type": "M16_DVB",
"hardware_id": "HE_DTV_W16N_AFADABAA",
"product_id": "43UH750V-ZA",
"core_os_release": "3.4.0-5908",
"webos_manufacturing_version": "05.60.25"

Hi @Informatic seems with the recent commits, I can no longer use libvtcapture as the backend. The hyperion-webos_libvtcapture that ships in PicCap still works though.

root@LGwebOSTV:/tmp# LD_LIBRARY_PATH=. ./hyperion-webos -a 192.168.0.191 -b libvtcapture
Error! Failed to load backend library: libvtcapture_backend.so, error: libhalgal.so.1: cannot open shared object file: No such file or directory
Error! detect_backend.
root@LGwebOSTV:/tmp# ldconfig -p | grep libhalgal
        libhalgal.so.2 (libc6) => /usr/lib/libhalgal.so.2
        libhalgal.so (libc6) => /usr/lib/libhalgal.so
root@LGwebOSTV:/tmp# grep -h -E '"(hardware_id|core_os_release|product_id|webos_manufacturing_version|board_type)"' /var/run/nyx/*
    "board_type": "O20_DVB",
    "hardware_id": "HE_DTV_W21O_AFABATAA",
    "product_id": "OLED55G16LA",
    "core_os_release": "6.0.1-454907",
    "webos_manufacturing_version": "03.11.23",

System Info:

    "board_type": "LM21U_DVB",
    "hardware_id": "HE_DTV_W21U_AFADATAA",
    "product_id": "86NANO926PB",
    "core_os_release": "6.2.0-39",
    "webos_manufacturing_version": "03.21.40",

Hyperion-WebOS version: latest unicapture branch build (https://github.com/webosbrew/hyperion-webos/actions/runs/2693316650)

Commandline invocation: ./hyperion-webos -v -a 192.168.31.98 -b libvtcapture

Short fail log:

     0.125s [ DBG unicapture_init_backend] libvtcapture_backend.so: loading...
     0.125s [ DBG unicapture_init_backend] libvtcapture_backend.so: loaded, initializing...
     0.125s [INFO capture_init        ] Starting vtcapture initialization.
     0.130s [WARN capture_init        ] vtCapture_create() failed: LSRegisterPubPriv FAILED
     0.130s [ ERR unicapture_init_backend] libvtcapture_backend.so: init failure, code: -2

Full log:

# ./hyperion-webos -v -a 192.168.31.98 -b libvtcapture
     0.000s [INFO main                ] Starting up (version: heads/unicapture-0-g852a91d)...
     0.001s [INFO main                ] Running via CLI
     0.001s [INFO service_init        ] Autodetecting UI backend...
     0.002s [ DBG unicapture_init_backend] libgm_backend.so: loading...
     0.002s [WARN unicapture_init_backend] Unable to load libgm_backend.so: libgm.so.1: cannot open shared object file: No such file or directory
     0.002s [WARN unicapture_try_backends] try_backends: backend: libgm_backend.so failed with code: -1
     0.067s [ DBG unicapture_init_backend] libhalgal_backend.so: loading...
     0.067s [ DBG unicapture_init_backend] libhalgal_backend.so: loaded, initializing...
     0.068s [INFO capture_init        ] Graphical capture enabled. Begin init..
initializing lock 'MADP_SYS'
[Utopia][MSOS]: [ERROR][MsOS_CreateMutex][2244]    [MsOS_CreateMutex][2244] Update max number of msos mutex: 256
[Utopia][MSOS]: [INFO][MsOS_SHM_Init][1097]     Mappd share memory: 0xt7120A000
[Utopia][MSOS]: [INFO][_MsOS_InitEventGroup][4053]     Flag=MSOS_SHM_QUERY Addr=0x71212130
[utopia info] utopia init
[utopia info] default using kernel mode utopia
[Utopia][PWS]: Function = PWSRegisterToUtopia, Line = 1134, PWS Register finished
[Utopia][MFE_EX]: MFERegisterToUtopia
[Utopia][AUDIO]: AUDIORegisterToUtopia is invoked
[Utopia][AUDIO]: AUDIORegisterToUtopia : Success to register resource 'audio0' of 1 resource
HDMITxRegisterToUtopia..................
[Utopia][SYS]: Function = SYSOpen, Line = 1722, [SYS INFO] OPEN INSTANCE...
[Utopia][MSOS]: [WARN][MsOS_Init][5846]     Already inited.
[Utopia][MSOS]: [INFO][MsOS_SHM_Init][1070]     Already inited.
[Utopia][SYS]: [MDrv_SYS_Init][199] Already inited.

KeyCustomerList[1].chipid:e8
[Utopia][IPAUTH]: Wrong hash key
[Utopia][IPAUTH]: 0003227400660000
[Utopia][IPAUTH]: MDrv_SYS_GetChipID:fc
[Utopia][IPAUTH]: Wrong Chip ID
[Utopia][IPAUTH]: [Auth NG]
[Utopia][IPAUTH]: AUTH STATUS:0
initializing lock 'HAL_GAL'
initializing lock 'GRAPHIC'
[Utopia][MSOS]: [INFO][MsOS_SHM_Init][1070]     Already inited.
root=/dev/mmcblk0p27  ro  rootfstype=squashfs PM ethaddr=B0:37:95:A3:FE:91 mmcoops=dump wdtlog=dump@1M quiet loglevel=0 console=ttyS0,115200 rootwait ssc_enable=<NULL> modelopt=001020100 hwopt=202210001104002001 ToolOpt=201326872:12307:1251801:65:15066675:825547531 modelName=86NANO926PB serialNum=110RAVF0W919 countryGrp=22 debugMode=5 devtmpfs.mount=1 chip=LM21UA0 snapshot resume=/dev/mmcblk0p48 tvregion=DVB NR_BANK=0x0 vmalloc=408M LX_MEM=0x1c500000 EMAC_MEM=0x100000 DRAM_LEN=0x80000000 LX_MEM2=0x43800000,0x58c00000 LX_MEM3=0xe0000000,0x0 DRAM_SIZE1=0x80000000 DRAM_SIZE2=0x0 KERNEL_PROTECT MIU_DEBUG_LEVEL=5 MIU_HIT_INTERRUPT=ON MIU_HIT_PANIC=OFF criu_enabled portProtection emmc_size=0x1d1fff000 BOOTLOGO_IN_MBOOT ENV_VAR_OFFSET=0x0 ENV_VAR_SIZE=0x10000 ENV=EMMC SECURITY=ON sver=0.01.179 bver=0.01.179 innolux=0 tcontype=0 SkipFlag_PMIC=<NULL> get_tconEnumFrom=<NULL> bForceVfreq60HZ=<NULL> enable_tcon_panel=0 bVfreq120to60HZ=0 CMA0=PVRDOWNLOAD,miu=0,hid=23,sz=0xc00000,st=0x19400000 CMA1=PVRUPLOAD,miu=0,hid=24,sz=0x400000,st=0x1a000000 CMA2=CIPLUS,miu=0,hid=27,sz=0x1000000,st=0x18400000 CMA3=GOP,miu=0,hid=29,sz=0x8400000,st=0x23800000 CMA6=PIP,miu=0,hid=25,sz=0x1800000,st=0x1a400000 CMA7=ACPU1,miu=0,hid=26,sz=0x400000,st=0x1bc00000 CMA8=ACPU2,miu=0,hid=30,sz=0x400000,st=0x1c000000 tee_mode=optee pwm=0 cmdEnd

[TCON] MApi_XC_Get_Tcon_Type 6521: u8tcontype = 0
     0.111s [INFO capture_init        ] HAL_GAL_Init done! Exit: 0
[Utopia][GOP API]:    MApi_GOP_GWIN_Delete32FB:3904   FBId = 142
     0.115s [INFO capture_init        ] HAL_GAL_CreateSurface done! SurfaceID: 0
     0.117s [INFO capture_init        ] HAL_GAL_CaptureFrameBuffer done! 0
     0.117s [INFO capture_init        ] HAL_GAL: gfx open ok result: 23
     0.119s [INFO capture_init        ] HAL_GAL: mmap() success
     0.119s [ DBG unicapture_init_backend] libhalgal_backend.so: success
     0.119s [ DBG unicapture_try_backends] try_backends: libhalgal_backend.so succeeded
     0.125s [ DBG unicapture_init_backend] libvtcapture_backend.so: loading...
     0.125s [ DBG unicapture_init_backend] libvtcapture_backend.so: loaded, initializing...
     0.125s [INFO capture_init        ] Starting vtcapture initialization.
     0.130s [WARN capture_init        ] vtCapture_create() failed: LSRegisterPubPriv FAILED
     0.130s [ ERR unicapture_init_backend] libvtcapture_backend.so: init failure, code: -2
     0.130s [ DBG service_register    ] Using LSRegister
     0.132s [ ERR service_register    ] Unable to register on Luna bus: Invalid permissions for org.webosbrew.piccap.service
     0.132s [WARN main                ] Service register failed: -1

So I'm ready rewriting hyperion-webos to a native webOS-service. It's also possible to run it from command line, logs will be redirected to PmLog. I don't know why, but we have a huge performance improvement with using libvtcapture and the native service. Maybe it's the same for other backends. The UI (PicCap) is also more responsive.

@Informatic @tuxuser @mariotaku Can some of you please review my changes? Doesn't want to break something.

The CI-Task has to be updated. Want to fix it when https://github.com/webosbrew/tv-native-apis/pull/13 is merged.

Thanks!

First of all, thanks for your great work. Some questions:

1. How is the current functionality? What is working, what is not?
2. Do we have a realistic chance to see a release soon?
3. Is this based on Hyperion.ng?
4. Which protocols are currently supported? Can I use WLED?

Thanks and best regards, Andre

The tv shows everithing in panoramic view and HyperHDR doesn't detect the frame because it is too far. Can I do the detection frame longer?

And another question, is there any option that captures better the colors? I don't mind using more resources.

Hallo an Alle!

Ich hab es geschaft meinen LG TV zu Rooten und alles soweit einzurichten nur wenn ich den TV einschalte bzw. neu Boote muss ich immer im hyperion/HyperHDR auf start gehen den nur dann Stehet bei Daemon running "YES" und dann funktioniert alles. Autostart ist aktiviert aber Daemon Startet nicht, was kann ich tun um das zu beheben?

This PR aims at solving the color accuracy issues seen with the LG capture APIs. Essentially, this is like HyperHDR's HDR tone mapping feature but integrated into hyperion-webos itself. The data format is also the same and as such lut tables from HyperHDR can be used as is. However, opposed to HyperHDR the tone mapping is always active because we are seeing color inaccuraries even on SDR content.

I am providing my LUT file that I calculated using machine learning by showing pregenerated color table images and capturing them. Then the network learned given an input capture color to predict the input color. The predictions were carried out for the full 8-bit color space and saved into a LUT file. The generated LUT is not perfect for many reasons possibly the most prominent one being that multiple input colors match the same captured color. Yet still, without LUT mapping colors are quite off. For instance, solid red captures as [228, 80, 52], green as [110, 255, 100] and blue as [44, 0, 184] which is quite far off the real value.

I am marking this as WIP because I haven't tested configuration reloading.

LUT table

In latest unicapture changes, we have changed how TVs powerstate is processed. In older versions we have used to completly stop capture on standby. Now we only stop capture and let capture interfaces in memory. The problem with older webOS TVs is, that in standby it regardless kills hyperion-webos after awake, which leads to not fully shut down capture interfaces and because of that a new interface can't be created.

This PR will introduce another quirk QUIRK_DILE_VT_DESTROY_ON_STOP, which will destroy DILE_VT interface, when a standby is in progress, so it can be created on next TV awake, without the need of disabling QuickStart+ or completly reboot TV.

This addresses https://github.com/webosbrew/hyperion-webos/issues/95

@tuxuser Can you please review?

Hi, I was using PicCap v0.23 now for like few month. Autostart was not working for hyperion, but was like ok-ish to go in to settings and manually re-start the hyperion service. But with the latest update of PicCap v0.41 it is even not possible to restart it via the PicCap gui. Only a Full TV reboot does help. The GUI capture is working fine since the latest update incl autostart, but not the video capture. Reloading, restarting the service does not help, only a FULL TV reboot, then it works fine, till standby. By returning from standby the video capture does not work anymore (only gui capture). I'd really appreciate if you could help.

Here are some details, my TV

    "board_type": "O18_DVB",
    "hardware_id": "HE_DTV_W18O_AFABABAA",
    "product_id": "OLED65C8LLA",
    "core_os_release": "4.4.0-9",
    "webos_manufacturing_version": "05.40.09",

here is the log

-rwxrwxrwx    1 1001     121            278 Sep 24 23:25 services.json
LGwebOSTV[j][/media/developer/apps/usr/palm/services/org.webosbrew.piccap.service]#  ./hyperion-webos -b libdi
le_vt -a 192.168.200.214
     0.001s [INFO main                ] Starting up (version: heads/main-0-gab718e5)...
     0.001s [INFO main                ] Running via CLI
     0.001s [INFO service_init        ] Autodetecting UI backend...
[004933.598955:hyperion-webos->hyperion-webos] <warning> GM_TEMPLATE_HASH_Insert : node already found..ptr = 0x63d60

[004933.599036:hyperion-webos->hyperion-webos] <warning> GM_TEMPLATE_HASH_Insert : node already found..ptr = 0x64190

[004933.599066:hyperion-webos->hyperion-webos] <warning> GM_TEMPLATE_HASH_Insert : node already found..ptr = 0x65680

[004933.599092:hyperion-webos->hyperion-webos] <warning> GM_TEMPLATE_HASH_Insert : node already found..ptr = 0x65ab0

[004933.599124:hyperion-webos->hyperion-webos] <warning> GM_TEMPLATE_HASH_Insert : node already found..ptr = 0x64e20

[004933.599149:hyperion-webos->hyperion-webos] <warning> GM_TEMPLATE_HASH_Insert : node already found..ptr = 0x65250

[004933.599185:hyperion-webos->hyperion-webos] <warning> GM_TEMPLATE_HASH_Insert : node already found..ptr = 0x66b48

[004933.599211:hyperion-webos->hyperion-webos] <warning> GM_TEMPLATE_HASH_Insert : node already found..ptr = 0x66f78

[004933.599236:hyperion-webos->hyperion-webos] <warning> GM_TEMPLATE_HASH_Insert : node already found..ptr = 0x66b48

[004933.599259:hyperion-webos->hyperion-webos] <warning> GM_TEMPLATE_HASH_Insert : node already found..ptr = 0x66f78

[004933.599283:hyperion-webos->hyperion-webos] <warning> GM_TEMPLATE_HASH_Insert : node already found..ptr = 0x63d60

[004933.599306:hyperion-webos->hyperion-webos] <warning> GM_TEMPLATE_HASH_Insert : node already found..ptr = 0x64190

[004933.599488:hyperion-webos->hyperion-webos] <warning> GM_TEMPLATE_HASH_Insert : node already found..ptr = 0x673a8

[004933.599518:hyperion-webos->hyperion-webos] <warning> GM_TEMPLATE_HASH_Insert : node already found..ptr = 0x677d8

[004933.599545:hyperion-webos->hyperion-webos] <warning> GM_TEMPLATE_HASH_Insert : node already found..ptr = 0x65680

[004933.599571:hyperion-webos->hyperion-webos] <warning> GM_TEMPLATE_HASH_Insert : node already found..ptr = 0x65ab0

[004933.599596:hyperion-webos->hyperion-webos] <warning> GM_TEMPLATE_HASH_Insert : node already found..ptr = 0x673a8

[004933.599620:hyperion-webos->hyperion-webos] <warning> GM_TEMPLATE_HASH_Insert : node already found..ptr = 0x677d8

[004933.599674:hyperion-webos->hyperion-webos] <warning> GM_TEMPLATE_HASH_Insert : node already found..ptr = 0x673a8

[004933.599698:hyperion-webos->hyperion-webos] <warning> GM_TEMPLATE_HASH_Insert : node already found..ptr = 0x677d8

[004933.599735:hyperion-webos->hyperion-webos] [_GM_UseGFXHWDirectly][905] _GM_UseGFXHWDirectly OK

     0.017s [INFO capture_init        ] Capture start called.
     0.017s [INFO capture_init        ] Attempting DILE_VT_Create...
     0.020s [WARN capture_init        ] Failed to get DILE_VT context!
     0.021s [ ERR unicapture_init_backend] libdile_vt_backend.so: init failure, code: -1
     0.072s [INFO connection_loop     ] Connecting hyperion-client..
     0.072s [INFO connection_loop     ] hyperion-client connected!
     0.073s [INFO unicapture_vsync_handler] vsync thread starting...
     0.073s [INFO unicapture_run      ] UI capture started
     0.078s [INFO power_callback      ] Power status callback message: { "subscribed": true, "returnValue": true, "state": "Active" }
     0.110s [INFO picture_callback    ] picture_callback: dynamicRange: sdr --> SDR mode
     0.138s [INFO set_hdr_state       ] Detected daemon flavor: 1 (Hyperion.NG)
     0.138s [WARN set_hdr_state       ] set_hdr_state: Daemon is not HyperHDR -> Not submitting HDR state!
     0.138s [ ERR picture_callback    ] videooutput_callback: set_hdr_state failed, ret: -2
^C     2.058s [INFO int_handler         ] SIGINT detected, stopping...
     2.069s [INFO unicapture_run      ] Shutting down...
     2.072s [INFO connection_loop     ] Ending connection loop
     2.077s [INFO unicapture_vsync_handler] vsync thread finished

Since our process is running as native service, we have encountered high CPU usage. Reason might be service register, which makes hyperion-webos able to use more CPU time than in older versions without luna bus registration. This leads to more unresponsive webOS UI and apps.

To reduce CPU usage it's currently possible to:

• Lower capture resolution
• Lower FPS & disable vSync
• Disable UI capture
• Use renice after each start

We should implement a priority change using setpriority(), which can be set by parameter.