If the source is already H.264/AAC and you only need to re‑container (no re‑encoding), the process is almost instantaneous:
ffmpeg -i source/nwoleakscomniks2021.mp4 \
-c copy \
-map 0 \
-metadata title="NWOLeaks.com – 2021 Release" \
final/nwoleaks_2021.mkv
Explanation of the flags
| Flag | Meaning |
|------|---------|
| -i | Input file |
| -c copy | Copy all streams (video, audio, subtitles) without re‑encoding |
| -map 0 | Include every stream from the input |
| -metadata title="…" | Optional: embed a title tag |
| Output path | Destination MKV file | nwoleakscomniks2mkv 2021
The document has garnered massive attention—and controversy—for several reasons: If the source is already H
The reception of the book has been sharply divided: Explanation of the flags | Flag | Meaning