VOD (video on demand) is a catalog of pre-recorded titles a viewer can start at any moment. Because the content already exists as files, the platform encodes each title once, stores the renditions, and serves them on request — there is no deadline and no "second chance" the way there is with live. That makes the VOD pipeline the more forgiving of the two: encoding can take its time, use multiple passes, and apply per-title optimization to squeeze quality out of every bit.
VOD is a delivery mode, not a business model. The same on-demand catalog can be monetized as SVOD (subscription), AVOD (ads), or TVOD (rent/buy), or any hybrid. What unites all of them is the request-driven flow: the viewer picks a title, the player fetches the manifest, and adaptive bitrate streaming takes over.
Architecturally, VOD emphasizes catalog management, metadata, search and recommendations, and long-tail storage economics, since a large library is mostly cold content punctuated by a few hot hits.
The handbook · 7 volumes
Fora Soft Video Engineering Handbook
VOD has no live deadline, so the real decisions are how each title is encoded, packaged and stored once for every screen. We wrote seven volumes on the video stack, and for VOD start with Volume 2: live versus VOD versus near-live, ingest, and HLS, MPEG-DASH and CMAF packaging. Volume 1 covers the encoding side and Volume 3 the ABR, CDN and player side. Written by Nikolay Sapunov, CEO at Fora Soft.
Building a VOD catalog that plays well everywhere without runaway storage and CDN costs?
Share your catalog size and target devices, and we will outline the VOD pipeline: encoding ladder, packaging, storage and CDN with a cost estimate. 250+ video products shipped since 2005.
