HON95-wiki/config/media/video-processing.md

---

title: Video Processing breadcrumbs:

• title: Configuration
• title: Media --- {% include header.md %}

FFmpeg

For general notes and streaming video notes, see the Video Streaming page.

Tasks

Concatenate Video Files

Useful e.g. to recombine video files for recorders which automatically splits the recording.

1. ffmpeg -f concat -safe 0 -i <(for f in ./*.MP4; do echo "file '$PWD/$f'"; done) -c copy output.MP4
   • For lexicographically sorted files ending in .MP4.

Speed Up/Slow Down Video, but Keep All Frames

Useful e.g. to change the framerate of a video-only timelapse video.

See: Speeding up/slowing down video (FFmpeg)

1. Convert to raw bitstream:
   • H.264: ffmpeg -i input.mp4 -map 0:v -c:v copy -bsf:v h264_mp4toannexb raw.h264
   • H.265: ffmpeg -i input.mp4 -map 0:v -c:v copy -bsf:v hevc_mp4toannexb raw.h265
2. Generate new video: ffmpeg -fflags +genpts -r <fps> -i raw.h264 -c:v copy output.mp4 (for desired frame rate fps)

{% include footer.md %}