23号以前：
移动端为了降低文件体积，将过场动画文件的视频/音频码率都进行了压缩，可以明显听出来声音很糊。

Steam版看样子是从移动端移植过来的，过场动画的质量同样是压缩过的，相较于早年的DVD原版，动画文件的体积缩小了至少一半。

遂用The RAD Video Tools将DVD原版的过场动画文件（bik格式）转换为mp4格式，替换压缩版。

打开游戏库，找到《天之痕》的界面，点击右上角【齿轮】图标，选择【管理】-【浏览本地文件】，打开游戏目录，将链接中的压缩包直接解压到Video文件夹，替换同名文件即可。

链接：
（百度网盘）ht删除这里tps:/pan.baidu.com/s/13XUNvbnVZLB0CCoxp6gL5g
提取码：swd3

（谷歌云盘）ht删除这里tps:/drive.google.com/file/d/17Z91TwCWGNt8Ng8i--ryJlKHcx5NNZpA/view?usp=sharing

动画文件码率对比——

以OP为例

General
Complete name : op.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/avc1/mp41)
File size : 23.8 MiB
Duration : 1 min 41 s
Overall bit rate mode : Variable
Overall bit rate : 1 959 kb/s
Movie name : op.bik
Writing application : Lavf58.43.100

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3
Format settings : CABAC / 3 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference : 3 frames
Format settings, GOP : M=1, N=29
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1 min 41 s
Bit rate : 1 826 kb/s
Width : 640 pixels
Height : 480 pixels
Display aspect ratio : 4:3
Frame rate mode : Variable
Frame rate : 29.970 (29970/1000) FPS
Minimum frame rate : 9.990 FPS
Maximum frame rate : 30.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.198
Stream size : 22.2 MiB (93%)
Codec configuration box : avcC

Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 1 min 41 s
Bit rate mode : Variable
Bit rate : 128 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 44.1 kHz
Frame rate : 43.066 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 1.54 MiB (6%)


General
Complete name : OP.mp4
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (mp41/isom)
File size : 45.9 MiB
Duration : 1 min 42 s
Overall bit rate : 3 773 kb/s
Encoded date : UTC 2021-08-19 17:49:29
Tagged date : UTC 2021-08-19 17:49:29

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Baseline@L5.1
Format settings : 2 Ref Frames
Format settings, CABAC : No
Format settings, Reference : 2 frames
Format settings, GOP : M=1, N=60
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1 min 42 s
Bit rate : 3 575 kb/s
Width : 640 pixels
Height : 480 pixels
Display aspect ratio : 4:3
Frame rate mode : Constant
Frame rate : 30.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.388
Stream size : 43.5 MiB (95%)
Encoded date : UTC 2021-08-19 17:49:29
Tagged date : UTC 2021-08-19 17:49:29
Codec configuration box : avcC

Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 1 min 42 s
Bit rate mode : Constant
Bit rate : 192 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 44.1 kHz
Frame rate : 43.066 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 2.37 MiB (5%)
mdhd_Duration : 102005