is there a way to know if the MKV file i have was encoded from a DVD or...

[zanzar]

is there a way to know if the MKC file i have was encoded from a source DVD or was re encoded from other video file?

here is his media info

Complete name : D:\Movies\Hentai Hub\[魔穗字幕组]2016年7月作品合集\7月作品合集[720P 8bit]\[maho.sub][ピンクパイナップル]PRETTY×CATION THE ANIMATION ＃2「姉妹の初恋」[720P x264 AAC].mkv
Format : Matroska
Format version : Version 4 / Version 2
File size : 450 MiB
Duration : 28mn 8s
Overall bit rate : 2 236 Kbps
Encoded date : UTC 2016-08-02 00:06:21
Writing application : mkvmerge v8.2.0 ('World of Adventure') 64bit
Writing library : libebml v1.3.1 + libmatroska v1.4.2

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4
Format settings, CABAC : Yes
Format settings, ReFrames : 6 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 28mn 8s
Bit rate : 2 115 Kbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 24.594 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.093
Stream size : 426 MiB (95%)
Writing library : x264 core 148 r2664+1+42 520bd6b Yuuki [8-bit@all X86_64][GCC 5.2.0]
Encoding settings : cabac=1 / ref=6 / deblock=1:0:0 / analyse=0x3:0x133 / me=umh / subme=10 / psy=1 / fade_compensate=0.20 / psy_rd=0.00:0.20 / mixed_ref=1 / me_range=18 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-1 / threads=16 / lookahead_threads=2 / sliced_threads=0 / nr=0 / decimate=0 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / fgo=1 / bframes=8 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=25 / keyint_min=1 / scenecut=40 / intra_refresh=0 / rc_lookahead=29 / rc=crf / mbtree=1 / crf=18.7000 / qcomp=0.70 / qpmin=0:0:0 / qpmax=69:69:69 / qpstep=4 / vbv_maxrate=15000 / vbv_bufsize=18000 / crf_max=0.0 / nal_hrd=none / filler=0 / ip_ratio=1.40 / aq=1:0.90
Default : Yes
Forced : No
Color range : Limited
Matrix coefficients : BT.709

Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : HE-AAC / LC
Codec ID : A_AAC
Duration : 28mn 8s
Bit rate : 119 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz / 24.0 KHz
Frame rate : 23.438 fps (1024 spf)
Compression mode : Lossy
Delay relative to video : 31ms
Stream size : 23.9 MiB (5%)
Default : Yes
Forced : No

also what is this "matroska" in the file type?

[jagabo]

is there a way to know if the MKC file i have was encoded from a source DVD or was re encoded from other video file?

No.

also what is this "matroska" in the file type?

MKV. https://www.matroska.org/technical/specs/index.html