ShanaEncoder压制部分日本1080i片源，流畅度变低，看到都是29.97帧的视频，为什么会这样？打开反交错双帧速率还原59.94
ShanaEncoder压制部分日本片源，流畅度变低，看到都是29.97帧的视频，为什么会这样？打开反交错双帧速率还原59.94答案，因为日本部分相机片源是双帧速率输出，，看到视频是29.97，实际上是59.94输出
片源问题如下图：
如何识别这种视频
你注意看有这个的顶部扫描方式就是双帧的
Scan type : MBAFF
Scan type, store method : Interleaved fields
Scan order : Top Field First
或者
Scan type : Interlaced
Scan type, store method : Separated fields
Scan order : Top Field First
我们正常看的处理后mp4视频文件基本是这样
Scan type : Progressive
片源详细完整参数：
General
Unique ID : 183886060476871455813459973500262493330 (0x8A572AC201459F85926B74608F312C92)
Complete name : D:\迅雷下载\4-001.mkv
Format : Matroska
Format version : Version 4 / Version 2
File size : 1.24 GiB
Duration : 5 min 0 s
Overall bit rate mode : Variable
Overall bit rate : 35.4 Mb/s
Encoded date : UTC 2019-01-01 19:05:37
Writing application : mkvmerge v8.5.2 ('Crosses') 64bit
Writing library : libebml v1.3.3 + libmatroska v1.4.4
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 5 min 0 s
Bit rate mode : Variable
Bit rate : 33.1 Mb/s
Maximum bit rate : 39.0 Mb/s
Width : 1 920 pixels
Height : 1 080 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 : MBAFF
Scan type, store method : Interleaved fields
Scan order : Top Field First
Bits/(Pixel*Frame) : 0.532
Stream size : 1.16 GiB (93%)
Default : Yes
Forced : No
Audio
ID : 2
Format : PCM
Format settings, Endianness : Big
Codec ID : A_PCM/INT/BIG
Duration : 5 min 0 s
Bit rate mode : Constant
Bit rate : 2 304 kb/s
Channel(s) : 2 channels
Sampling rate : 48.0 kHz
Frame rate : 200.000 FPS (240 spf)
Bit depth : 24 bits
Stream size : 82.6 MiB (7%)
Default : Yes
Forced : No
Detail information
General
Count : 322
Count of stream of this kind : 1
Kind of stream : General
Kind of stream : General
Stream identifier : 0
Unique ID : 183886060476871455813459973500262493330
Unique ID : 183886060476871455813459973500262493330 (0x8A572AC201459F85926B74608F312C92)
Count of video streams : 1
Count of audio streams : 1
Video_Format_List : AVC
Video_Format_WithHint_List : AVC
Codecs Video : AVC
Video_Language_List : English
Audio_Format_List : PCM
Audio_Format_WithHint_List : PCM
Audio codecs : PCM
Audio_Language_List : English
Complete name : D:\迅雷下载\4-001.mkv
Folder name : D:\迅雷下载
File name : 4-001
File extension : mkv
Format : Matroska
Format : Matroska
Format/Url : http://packs.matroska.org/
Format/Extensions usually used : mkv mk3d mka mks
Commercial name : Matroska
Format version : Version 4 / Version 2
Codec : Matroska
Codec : Matroska
Codec/Url : http://packs.matroska.org/
Codec/Extensions usually used : mkv mk3d mka mks
File size : 1329921891
File size : 1.24 GiB
File size : 1 GiB
File size : 1.2 GiB
File size : 1.24 GiB
File size : 1.239 GiB
Duration : 300870
Duration : 5 min 0 s
Duration : 5 min 0 s 870 ms
Duration : 5 min 0 s
Duration : 00:05:00.870
Duration : 00:05:00;25
Duration : 00:05:00.870 (00:05:00;25)
Overall bit rate mode : VBR
Overall bit rate mode : Variable
Overall bit rate : 35362032
Overall bit rate : 35.4 Mb/s
Frame rate : 29.970
Frame rate : 29.970 FPS
Frame count : 9015
Stream size : 160423
Stream size : 157 KiB (0%)
Stream size : 157 KiB
Stream size : 157 KiB
Stream size : 157 KiB
Stream size : 156.7 KiB
Stream size : 157 KiB (0%)
Proportion of this stream : 0.00012
Encoded date : UTC 2019-01-01 19:05:37
File creation date : UTC 2019-01-01 19:13:07.103
File creation date (local) : 2019-01-02 03:13:07.103
File last modification date : UTC 2019-01-01 19:15:18.530
File last modification date (local) : 2019-01-02 03:15:18.530
Writing application : mkvmerge v8.5.2 ('Crosses') 64bit
Writing application : mkvmerge v8.5.2 ('Crosses') 64bit
Writing library : libebml v1.3.3 + libmatroska v1.4.4
Writing library : libebml v1.3.3 + libmatroska v1.4.4
Video
Count : 341
Count of stream of this kind : 1
Kind of stream : Video
Kind of stream : Video
Stream identifier : 0
StreamOrder : 0
ID : 1
ID : 1
Unique ID : 5939765481808551049
Format : AVC
Format/Info : Advanced Video Codec
Format/Url : http://developers.videolan.org/x264.html
Commercial name : AVC
Format profile : High@L4.1
Format settings : CABAC / 4 Ref Frames
Format settings, CABAC : Yes
Format settings, CABAC : Yes
Format settings, ReFrames : 4
Format settings, ReFrames : 4 frames
Internet media type : video/H264
Codec ID : V_MPEG4/ISO/AVC
Codec ID/Url : http://ffdshow-tryout.sourceforge.net/
Codec : V_MPEG4/ISO/AVC
Codec : AVC
Codec/Family : AVC
Codec/Info : Advanced Video Codec
Codec/Url : http://ffdshow-tryout.sourceforge.net/
Codec profile : High@L4.1
Codec settings : CABAC / 4 Ref Frames
Codec settings, CABAC : Yes
Codec_Settings_RefFrames : 4
Duration : 300800.000000
Duration : 5 min 0 s
Duration : 5 min 0 s 800 ms
Duration : 5 min 0 s
Duration : 00:05:00.800
Duration : 00:05:00;25
Duration : 00:05:00.800 (00:05:00;25)
Bit rate mode : VBR
Bit rate mode : Variable
Bit rate : 33061460
Bit rate : 33.1 Mb/s
Maximum bit rate : 38999808
Maximum bit rate : 39.0 Mb/s
Width : 1920
Width : 1 920 pixels
Height : 1080
Height : 1 080 pixels
Stored_Height : 1088
Sampled_Width : 1920
Sampled_Height : 1080
Pixel aspect ratio : 1.000
Display aspect ratio : 1.778
Display aspect ratio : 16:9
Frame rate mode : CFR
Frame rate mode : Constant
Frame rate : 29.970
Frame rate : 29.970 (30000/1001) FPS
FrameRate_Num : 30000
FrameRate_Den : 1001
Frame count : 9015
Resolution : 8
Resolution : 8 bits
Colorimetry : 4:2:0
Color space : YUV
Chroma subsampling : 4:2:0
Chroma subsampling : 4:2:0
Bit depth : 8
Bit depth : 8 bits
Scan type : MBAFF
Scan type : MBAFF
Scan type, store method : InterleavedFields
Scan type, store method : Interleaved fields
Scan order : TFF
Scan order : Top Field First
Interlacement : MBAFF
Interlacement : MBAFF
Bits/(Pixel*Frame) : 0.532
Delay : 0
Delay : 00:00:00.000
Delay, origin : Container
Delay, origin : Container
Stream size : 1243110908
Stream size : 1.16 GiB (93%)
Stream size : 1 GiB
Stream size : 1.2 GiB
Stream size : 1.16 GiB
Stream size : 1.158 GiB
Stream size : 1.16 GiB (93%)
Proportion of this stream : 0.93472
Default : Yes
Default : Yes
Forced : No
Forced : No
Buffer size : 30000000 / 30000000
Audio
Count : 279
Count of stream of this kind : 1
Kind of stream : Audio
Kind of stream : Audio
Stream identifier : 0
StreamOrder : 1
ID : 2
ID : 2
Unique ID : 9671603568671224194
Format : PCM
Commercial name : PCM
Format settings : Big
Format settings, Endianness : Big
Codec ID : A_PCM/INT/BIG
Codec : PCM
Codec : PCM
Codec/Family : PCM
Codec/Info : Linear PCM (Big Endian)
Codec settings : Big
Codec settings, Endianness : Big
Duration : 300870.000000
Duration : 5 min 0 s
Duration : 5 min 0 s 870 ms
Duration : 5 min 0 s
Duration : 00:05:00.870
Duration : 00:05:00:A4
Duration : 00:05:00.870 (00:05:00:A4)
Bit rate mode : CBR
Bit rate mode : Constant
Bit rate : 2304000
Bit rate : 2 304 kb/s
Channel(s) : 2
Channel(s) : 2 channels
Samples per frame : 240
Sampling rate : 48000
Sampling rate : 48.0 kHz
Samples count : 14441760
Frame rate : 200.000
Frame rate : 200.000 FPS (240 spf)
Frame count : 60174
Resolution : 24
Resolution : 24 bits
Bit depth : 24
Bit depth : 24 bits
Delay : 0
Delay : 00:00:00.000
Delay, origin : Container
Delay, origin : Container
Delay relative to video : 0
Delay relative to video : 00:00:00.000
Video0 delay : 0
Video0 delay : 00:00:00.000
Stream size : 86650560
Stream size : 82.6 MiB (7%)
Stream size : 83 MiB
Stream size : 83 MiB
Stream size : 82.6 MiB
Stream size : 82.64 MiB
Stream size : 82.6 MiB (7%)
Proportion of this stream : 0.06515
Default : Yes
Default : Yes
Forced : No
Forced : No
MediaInfoLib - v0.7.91
解决方法：
打开双帧，然后必须手动设置双倍的帧数，不能留空，然后查看输出文件信息正确，开始压制
注：就算你不压59.54帧，只要它29.97，那也要打开双帧速率，否则由于扫描方式的不同，可能出现某些场景画面亮度会变暗，出现和片源光亮不符合的异常问题。
当然为了尊重原作者，个人建议还是保持59.94帧视频压制输出，此时画面流畅度会更高，原生支持高帧率。
谢谢分享谢谢分享
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