Open Aegisub, Menu - Video - Open video open video.mp4
Use arrow key or scroll on the timeline, checkout frame 150
If you look from frame 145 or earlier to frame 150, you'll see cat ears.
If you look from frame 155 or later to frame 150, you'll see Japanese text.
They have the same time and frame info displayed in Aegisub.
In other software (ffmpeg/AviSynth), frame 150 is always the cat ears.
ffmpeg -i video.mp4 -vf "select='eq(n\,150)+eq(n\,151)'" -vsync vfr frames_%03d.png
MediaInfo
```txt
General
Complete name : video.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/avc1/mp41)
File size : 92.5 MiB
Duration : 4 min 30 s
Overall bit rate : 2 873 kb/s
Frame rate : 23.976 FPS
Writing application : Lavf61.1.100
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4
Format settings : CABAC / 3 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference frames : 3 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 4 min 29 s
Bit rate : 2 739 kb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 23.976 (24000/1001) FPS
Minimum frame rate : 23.974 FPS
Maximum frame rate : 23.981 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.055
Stream size : 88.2 MiB (95%)
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Codec configuration box : avcC
Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 4 min 30 s
Bit rate mode : Constant
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 : 4.12 MiB (4%)
Title : ISO Media file produced by Google Inc.
Language : English
Default : Yes
Alternate group : 1
```
FFprobe info of frame 150-151
```txt
[FRAME]
media_type=video
stream_index=0
key_frame=0
pts=559309
pts_time=6.214544
pkt_dts=559309
pkt_dts_time=6.214544
best_effort_timestamp=559309
best_effort_timestamp_time=6.214544
duration=3753
duration_time=0.041700
pkt_pos=1673489
pkt_size=115
width=1920
height=1080
crop_top=0
crop_bottom=0
crop_left=0
crop_right=0
pix_fmt=yuv420p
sample_aspect_ratio=1:1
pict_type=P
interlaced_frame=0
top_field_first=0
repeat_pict=0
color_range=tv
color_space=bt709
color_primaries=bt709
color_transfer=bt709
chroma_location=left
[/FRAME]
[FRAME]
media_type=video
stream_index=0
key_frame=1
pts=563063
pts_time=6.256256
pkt_dts=563063
pkt_dts_time=6.256256
best_effort_timestamp=563063
best_effort_timestamp_time=6.256256
duration=3753
duration_time=0.041700
pkt_pos=1674359
pkt_size=22110
width=1920
height=1080
crop_top=0
crop_bottom=0
crop_left=0
crop_right=0
pix_fmt=yuv420p
sample_aspect_ratio=1:1
pict_type=I
interlaced_frame=0
top_field_first=0
repeat_pict=0
color_range=tv
color_space=bt709
color_primaries=bt709
color_transfer=bt709
chroma_location=left
[SIDE_DATA]
side_data_type=H.26[45] User Data Unregistered SEI message
[/SIDE_DATA]
[/FRAME]
```
Version: Win32&Win64 v3.2.2, wangqr/Aegisub v3.3.3 (Aegisub on linux cannot reproduce this issue)
Step to reproduce:
ACB7F7567197213690DF0F6A28585E81E1C770A4E791FE209AA1749F5FA82BD4
Menu - Video - Open video
open video.mp4ffmpeg -i video.mp4 -vf "select='eq(n\,150)+eq(n\,151)'" -vsync vfr frames_%03d.png
MediaInfo
```txt General Complete name : video.mp4 Format : MPEG-4 Format profile : Base Media Codec ID : isom (isom/iso2/avc1/mp41) File size : 92.5 MiB Duration : 4 min 30 s Overall bit rate : 2 873 kb/s Frame rate : 23.976 FPS Writing application : Lavf61.1.100 Video ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : High@L4 Format settings : CABAC / 3 Ref Frames Format settings, CABAC : Yes Format settings, Reference frames : 3 frames Codec ID : avc1 Codec ID/Info : Advanced Video Coding Duration : 4 min 29 s Bit rate : 2 739 kb/s Width : 1 920 pixels Height : 1 080 pixels Display aspect ratio : 16:9 Frame rate mode : Variable Frame rate : 23.976 (24000/1001) FPS Minimum frame rate : 23.974 FPS Maximum frame rate : 23.981 FPS Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Progressive Bits/(Pixel*Frame) : 0.055 Stream size : 88.2 MiB (95%) Color range : Limited Color primaries : BT.709 Transfer characteristics : BT.709 Matrix coefficients : BT.709 Codec configuration box : avcC Audio ID : 2 Format : AAC LC Format/Info : Advanced Audio Codec Low Complexity Codec ID : mp4a-40-2 Duration : 4 min 30 s Bit rate mode : Constant 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 : 4.12 MiB (4%) Title : ISO Media file produced by Google Inc. Language : English Default : Yes Alternate group : 1 ```FFprobe info of frame 150-151
```txt [FRAME] media_type=video stream_index=0 key_frame=0 pts=559309 pts_time=6.214544 pkt_dts=559309 pkt_dts_time=6.214544 best_effort_timestamp=559309 best_effort_timestamp_time=6.214544 duration=3753 duration_time=0.041700 pkt_pos=1673489 pkt_size=115 width=1920 height=1080 crop_top=0 crop_bottom=0 crop_left=0 crop_right=0 pix_fmt=yuv420p sample_aspect_ratio=1:1 pict_type=P interlaced_frame=0 top_field_first=0 repeat_pict=0 color_range=tv color_space=bt709 color_primaries=bt709 color_transfer=bt709 chroma_location=left [/FRAME] [FRAME] media_type=video stream_index=0 key_frame=1 pts=563063 pts_time=6.256256 pkt_dts=563063 pkt_dts_time=6.256256 best_effort_timestamp=563063 best_effort_timestamp_time=6.256256 duration=3753 duration_time=0.041700 pkt_pos=1674359 pkt_size=22110 width=1920 height=1080 crop_top=0 crop_bottom=0 crop_left=0 crop_right=0 pix_fmt=yuv420p sample_aspect_ratio=1:1 pict_type=I interlaced_frame=0 top_field_first=0 repeat_pict=0 color_range=tv color_space=bt709 color_primaries=bt709 color_transfer=bt709 chroma_location=left [SIDE_DATA] side_data_type=H.26[45] User Data Unregistered SEI message [/SIDE_DATA] [/FRAME] ```