QHD to one 4k sync and encoding problem

[zinonino]

I want to sync 4 HD video clips to one UHD(4K 2160p), i use script , but every clip not play same sync: see pic
http://www.imagebam.com/image/bcc135521383970
After that to encode to hevc or .. 2160p


Avisynch sript:

TR=directshowsource("UHD-Top_Right.ts")
TL=directshowsource("UHD-Top_Left.ts")
Top=StackHorizontal(TL, TR)

BL=directshowsource("UHD-Bottom_Left.ts")
BR=directshowsource("UHD-Bottom_Right.ts")
Bot=StackHorizontal(BL, BR)

StackVertical(Top, Bot)

All 4 video clips info:

Video
ID : 514 (0x202)
Menu ID : 202 (0xCA)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High 10@L4.2
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : 27
Duration : 2 h 24 min
Bit rate mode : Constant
Bit rate : 17.8 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 50.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 10 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.172
Stream size : 17.5 GiB (95%)
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709

Thanks

[Selur]

Do not use DirectShowSource, better use LWLibavVideoSource.

[jagabo]

If the four videos don't start at the same frame use Trim() to remove initial frames. For example,

TR = LWLibavVideoSource("UHD-Top_Right.ts").Trim(5,0) # remove first five frames

Do that for each clip that needs it.