chinese hardsub external flac audio track are not better quality, just original stereo downmixed to mono General Complete name : Gakkou.Gurashi.2019.BD.720P.(Chinese_Hardsub).mp4 Format : MPEG-4 Format profile : Base Media Codec ID : isom (isom) File size : 1.51 GiB Duration : 1 h 41 min Overall bit rate mode : Variable Overall bit rate : 2 129 kb/s Encoded date : UTC 2019-07-18 15:36:37 Tagged date : UTC 2019-07-18 15:36:37 Video ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : High@L3.1 Format settings : CABAC / 4 Ref Frames Format settings, CABAC : Yes Format settings, Reference frames : 4 frames Codec ID : avc1 Codec ID/Info : Advanced Video Coding Duration : 1 h 41 min Bit rate : 2 000 kb/s Maximum bit rate : 11.1 Mb/s Width : 1 280 pixels Height : 692 pixels Display aspect ratio : 1.85:1 Frame rate mode : Constant Frame rate : 23.976 (24000/1001) FPS Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Progressive Bits/(Pixel*Frame) : 0.094 Stream size : 1.42 GiB (94%) Writing library : x264 core 120 r2164 da19765 Encoding settings : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=12 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=2 / keyint=240 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=2pass / mbtree=1 / bitrate=2000 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / aq=1:1.00 Encoded date : UTC 2019-07-18 14:40:20 Tagged date : UTC 2019-07-18 15:38:23 Codec configuration box : avcC Audio ID : 2 Format : AAC LC Format/Info : Advanced Audio Codec Low Complexity Codec ID : mp4a-40-2 Duration : 1 h 41 min Bit rate mode : Variable Bit rate : 125 kb/s Maximum bit rate : 146 kb/s Channel(s) : 2 channels Channel layout : L R Sampling rate : 48.0 kHz Frame rate : 46.875 FPS (1024 SPF) Compression mode : Lossy Stream size : 91.1 MiB (6%) Title : à8�� Encoded date : UTC 2019-07-18 15:38:20 Tagged date : UTC 2019-07-18 15:38:23