Help converting m2ts to mkv

[Legiit]

Hi
So a friend of mine sent me a short clip .m2ts that is ripped from a blu-ray disk. Any tips on how to convert it to an mkv with no quality loss (untouched bitrate) and add my own mp3 audio to it? I don't care on how big the output file is, quality is what matters. Thanks

Input Video:
Count : 119
Count of stream of this kind : 1
Kind of stream : Video
StreamKindID : 0
ID : 4113
ID : 4113 (0x1011)
Menu ID : 1
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format/Url : http://developers.videolan.org/x264.html
Format profile : High@L4.1
Format settings : CABAC / 4 Ref Frames
Format settings, CABAC : Yes
Format settings, ReFrames : 4
Codec : AVC
Codec : AVC
Codec/Family : AVC
Codec/Info : Advanced Video Codec
Codec/Url : http://developers.videolan.org/x264.html
Codec profile : High@L4.1
Codec settings : CABAC / 4 Ref Frames
Codec settings, CABAC : Yes
Codec_Settings_RefFrames : 4
Duration : 269266
Duration : 4mn 29s
Duration : 4mn 29s 266ms
Duration : 4mn 29s
Duration : 00:04:29.266
Width : 1920
Width : 1920 pixels
Height : 1080
Height : 1080 pixels
Pixel Aspect Ratio : 1.000
Display aspect ratio : 1.778
Display aspect ratio : 16/9
Frame rate : 29.970
Frame rate : 29.970 fps
FrameCount : 8078
Standard : NTSC
Colorimetry : 4:2:0

[Baldrick]

mkvmergegui

[Legiit]

mkvmergegui

I tried that. When i add the m2ts file i get unsupported format error.
"The file is an unssupported container format (MPEG Transport Stream (TS))."

Any help would be much appreciated. Is there any guide somewhere?

EDIT:I tried opening another normal avi file and i managed to add my own mp3 to it with no problem, so all i need to know is how to open this .m2ts file into mkvmergegui

[nikusor665]

You need to demux the tracks from the m2ts file with tsmuxergui , mkvmergegui the tracks .

[Big Bob]

use XviD4PSP5 and use the copy option for Video & Audio, it will then mux into a new MKV container without quality loss

[Legiit]

You need to demux the tracks from the m2ts file with tsmuxergui , mkvmergegui the tracks .

Thanks for this. And it only took like 10secs. Does anyone know where i can find a guide on how to use the crop feature on mkvmerge because i have searched for one but no luck?