On 04/04/2025 10.16, jeremie bergeron wrote:
Hi,
This is not strictly an FFmpeg question but rather a general video
processing question regarding when subtitles should be rendered.
In this discussion, we are debating whether subtitles should be displayed
based on *clock timestamps* or *frame timestamps (PTS)*.
Let's say I have a video with those timestamps:
-
Frame 0: 0 ms
-
Frame 1: 42 ms
-
Frame 2: 83 ms
... continues
Frame 9: 375 ms
... continues
Frame 20: 834 ms
Now, let's consider a subtitle that starts at *400 ms* and ends at *860 ms*.
Subtitle Edit (https://www.nikse.dk/subtitleedit) has a tool called "Beautify time codes". The tool
snaps subtitle times to the elapsed-time equivalents of frame PTSes. So your 0:0.400..0:0.860
subtitle would snap to 0:0.375..0:0.834.
Hope this helps.
_______________________________________________
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-user
To unsubscribe, visit link above, or email
ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
