Output Options¶

Configure video output for different platforms.

Combined Video (YouTube)¶

Generate a single video file with all slides:

vac \
  --input slides.md \
  --output video.mp4

With Transitions¶

Add crossfade transitions between slides:

vac \
  --input slides.md \
  --output video.mp4 \
  --transition 0.5

The --transition value is in seconds (0.5 = half second crossfade).

Individual Videos (Udemy)¶

Export each slide as a separate video file:

vac \
  --input slides.md \
  --output combined.mp4 \
  --output-individual ./lectures/

This creates:

lectures/
├── slide_000.mp4
├── slide_001.mp4
├── slide_002.mp4
└── ...

Udemy Tip

Udemy recommends lectures be 2+ minutes. For short slides, add longer pause directives or combine related slides.

Both Outputs¶

Generate combined and individual videos:

vac \
  --input slides.md \
  --output youtube_video.mp4 \
  --output-individual ./udemy_videos/ \
  --transition 0.5

Video Specifications¶

All videos are encoded with platform-optimized settings:

Setting	Value	Notes
Container	MP4	Universal compatibility
Video Codec	H.264 (libx264)	Required by YouTube & Udemy
Resolution	1920x1080	Full HD (configurable)
Frame Rate	30fps	Standard (configurable)
Quality	CRF 23	Good quality/size balance
Pixel Format	yuv420p	Maximum compatibility
Audio Codec	AAC	Required by both platforms
Audio Bitrate	192kbps	Clear speech audio

Custom Resolution¶

# 720p
vac --input slides.md --output video.mp4 \
  --width 1280 --height 720

# 4K
vac --input slides.md --output video.mp4 \
  --width 3840 --height 2160

Custom Frame Rate¶

# 24fps (cinematic)
vac --input slides.md --output video.mp4 --fps 24

# 60fps (smooth)
vac --input slides.md --output video.mp4 --fps 60

Platform Compatibility¶

Platform	Combined	Individual	Transitions
YouTube	✅	-	✅
Udemy	✅	✅	✅
Coursera	✅	✅	✅
Vimeo	✅	-	✅
LinkedIn Learning	✅	✅	✅