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ffmpeg -i MIDV-918.mp4 -itsoffset -1.73 -i MIDV-918.srt -c copy -c:s mov_text output.mp4 This is useful if convert means “cut and convert to a shorter clip.”
| Meaning | Description | |---------|-------------| | | Move the entire subtitle track so that a specific line aligns with 02:01.47 . | | Video cut/split | Extract a segment starting or ending at that timestamp. | | Format conversion | Convert the video (e.g., from MKV to MP4) while burning or keeping subs. | | Subtitle OCR | Convert image-based subtitles (PGS, VobSub) to text (SRT) at that time. | | Sync correction | Fix desync by setting a reference point at 02:01.47 . |
Video → Jump to Frame → 20147 → then adjust subtitle to that frame.
Thus 020147 is almost certainly , not a frame count. But if you did mean frame 20147:
# Cut from 02:01.47 to end ffmpeg -i MIDV-918.mp4 -ss 00:02:01.47 -c copy -avoid_negative_ts make_zero clip_from_020147.mp4 ffmpeg -i MIDV-918.mp4 -t 00:02:01.47 -c copy clip_until_020147.mp4
ffmpeg -i MIDV-918.mp4 -vf "drawtext=text='frame 20147':x=10:y=10" -frames:v 1 frame_20147.png | Error | Likely Cause | Fix | |-------|--------------|-----| | Subtitles drift after conversion | Variable frame rate (VFR) video | Convert to CFR (constant frame rate): ffmpeg -i input.mp4 -r 24 output.mp4 | | 02:01.47 not accurate | FFmpeg’s -ss before -i (fast but inaccurate) | Use -ss after -i for frame-accurate seeking | | Burned subtitles appear shifted | Filter order mistake | Place subtitles filter after scaling: -vf "scale=1280:720,subtitles=file.srt" | | MKV subtitle stream missing after conversion | Not mapping streams | Use -map 0 to copy all tracks | Part 7: Automation Script for midv918engsub convert020147 min Save this script as auto_subtitle_shift.sh (Linux/macOS) or use in WSL/Git Bash:
To English subtitles at that cut point:
Provide your exact source format (MKV/MP4), whether subtitles are embedded or external, and what “convert” means to you, and I will give you the exact command line.