HD 720p from official website. No watermark version.

General
Unique ID                      : 96547729862154277931862362109219680700 (0x48A26A9937AD048FB65AF0AEE197B1BC)
Complete name                  : [MagicStar] Ten Akagi Shigeru Soushiki-hen [WEBDL] [720p].mkv
Format                         : Matroska
Format version                 : Version 4
File size                      : 2.05 GiB
Duration                       : 1 h 33 min
Overall bit rate mode          : Variable
Overall bit rate               : 3 132 kb/s
Writing application            : Lavf57.48.101
Writing library                : Lavf57.48.101

Video
ID                             : 1
Format                         : AVC
Format/Info                    : Advanced Video Codec
Format profile                 : Main@L3.1
Format settings                : CABAC / 3 Ref Frames
Format settings, CABAC         : Yes
Format settings, ReFrames      : 3 frames
Format settings, GOP           : M=1, N=30
Codec ID                       : V_MPEG4/ISO/AVC
Duration                       : 1 h 33 min
Bit rate mode                  : Variable
Maximum bit rate               : 40.0 Mb/s
Width                          : 1 280 pixels
Height                         : 720 pixels
Display aspect ratio           : 16:9
Frame rate mode                : Constant
Frame rate                     : 29.970 (30000/1001) FPS
Color space                    : YUV
Chroma subsampling             : 4:2:0
Bit depth                      : 8 bits
Scan type                      : Progressive
Writing library                : Zencoder Video Encoding System
Default                        : Yes
Forced                         : No
Color range                    : Limited
Color primaries                : BT.709
Transfer characteristics       : BT.709
Matrix coefficients            : BT.709

Audio
ID                             : 2
Format                         : AAC LC
Format/Info                    : Advanced Audio Codec Low Complexity
Codec ID                       : A_AAC-2
Duration                       : 1 h 33 min
Channel(s)                     : 2 channels
Channel layout                 : L R
Sampling rate                  : 48.0 kHz
Frame rate                     : 46.875 FPS (1024 SPF)
Compression mode               : Lossy
Default                        : Yes
Forced                         : No