Upscale DVD to 4K without pretending it is HD

DVD-Video is a consumer format built on MPEG-2. Wikipedia's DVD-Video article states that discs use H.262/MPEG-2 Part 2 compression at up to 9.8 Mbit/s for video or MPEG-1 Part 2 at up to 1.856 Mbit/s, with 8-bit YCbCr and 4:2:0 chroma subsampling, and that commercial films are typically encoded with adaptive bitrates of roughly 3 to 9.5 Mbit/s. It also notes that MPEG-2 supports both interlaced and progressive content and can carry flags identifying scan type, field order and repeating fields.

The frame itself is standard definition. Wikipedia's 480p article gives the standard-definition picture as 720 × 480 at 60 Hz in NTSC regions and 720 or 768 × 576 in PAL regions, with interlacing required for those modes because of the 15.7 kHz horizontal scan rate. In megapixels that is roughly a third of a megapixel of luma, before any compression loss is counted, against about 2.07 megapixels at 1080p and 8.29 at 4K.

Two consequences shape everything else on this page. First, a disc is already a compressed master, so the artifacts you see — blocking in gradients, banding in skies, mosquito noise around hard edges — were baked in when the disc was authored, and the upscale will enlarge them before it softens them. Second, anamorphic and interlaced material must be handled before an enhancement pass, because a reconstruction model given interlaced fields can sharpen the comb teeth rather than remove them.

This service never sees a disc. It does not read VOB files, open a VIDEO_TS folder, handle an ISO, decrypt Content Scramble System protection or obey region coding, and it does not touch menus, angles or subtitles. Whatever you upload has to be a plain video file the browser accepts — MP4, MOV, MKV, WebM, AVI and similar, at most 500 MB — or a publicly reachable HTTPS video URL. Making that file is your step, and it needs to be lawful where you are.

Two decisions belong in that step. If the disc is interlaced, deinterlace with a method that respects field order and export progressive frames; the upscale request has no field-order option, so combing in the source stays combing in the output, often worsened. If the disc is anamorphic 16:9 stored inside a 720 × 480 frame, correct the pixel aspect ratio or letterbox deliberately in your editor, because the pipeline exposes no aspect-ratio parameter and does not crop or pad for you.

Then split. A two-hour feature at a 10-minute source limit becomes roughly twelve submissions, so plan the breaks at chapter boundaries or at natural scene changes. Keeping a written list of which segment starts where saves more time than any setting does, because a re-run only has to touch the segment that failed.

Both tiers work and both bill real credits, so choose from the table below rather than from the number in the name. A standard-definition disc frame carries roughly a third of a megapixel; 1080p output is about 2.07 megapixels and 4K output about 8.29, roughly six and twenty-four times the source. The upscale can make that picture play back smoothly on a modern display and pass cleanly through a modern encoder, but it is enlarging detail the disc recorded, not discovering new detail.

At the Standard model, 720p and 1080p bill the same 9 credits a second, so 1080p is the sensible default, while 4K bills 33 — about 3.7 times as much per second. The honest reason to pay for 4K is a delivery specification that requires a 4K frame: a 4K timeline, a client technical checklist, or a display chain that handles 4K better than 1080p. 2K sits between them at 17 credits a second and is a reasonable intermediate master.

One class of disc genuinely rewards a heavier treatment: well-authored animation, transfers from good masters and material with hard black outlines carry more usable structure than a typical live-action film. Even there, test one scene at both tiers and compare before committing a whole feature, because a per-disc judgement beats a general rule.

Pick five to ten seconds that hold the worst of the disc: a dark interior, a sky with visible banding, a fast pan, on-screen text, and any face you care about. Upload that export, choose the model and the output tier, and read the credit quote before you submit. At a five-second billing minimum the test costs a handful of credits, and it is the only honest way to learn what a model does to that particular transfer.

Write the pass and fail rules before you watch. Reject a setting when flat backgrounds start to crawl, when lettering changes shape, when skin goes waxy, when grain turns into a repeating pattern, or when edges acquire haloes. Accept it when banding steps soften without the sky going flat, when faces keep their identity across a pan, and when the result is stable enough that you would ship the same settings on the next chapter.

Then process the film in 10-minute segments, keeping notes per segment: source export, chapter, model, tier, credits and verdict. Keep the untouched export so any segment can be re-run at a different model, and stop segmentation at natural breaks so a rejected setting never forces you to re-process material that was already fine.

Every figure here comes from the published credit table. At the Standard model 1080p bills 9 credits a second, which is 540 credits a minute and 32,400 an hour of source footage; 2K bills 17 a second and 4K bills 33. FlashVSR bills 30 credits a second at 1080p, and SeedVR2, Pro and Ultimate bill 49 credits a second at 1080p.

Convert that to the plan you would actually buy. Creator is $238.80 for 28,000 credits, about 10 hours of 1080p Standard work; Starter is $118.80 for 9,600 credits and Studio is $598.80 for 80,000 credits. The smallest public general pack starts at $29.99 for 1,500 credits when you only want to check one scene.

Read those figures against a real disc. A two-hour film at 1080p Standard is about 120 minutes, or roughly 64,800 credits, which is more than a single Creator year covers; the same film at Standard 4K is about 237,600 credits. That is why the sensible plan for a collection is to test per disc, process the discs you will actually watch, and choose the model deliberately rather than defaulting to the heaviest one everywhere.

A DVD carries its audio in Dolby Digital, DTS, PCM or MPEG-1 Layer II, and the DVD-Video article notes the audio rules differ between NTSC and PAL territories and that up to eight tracks can be present. None of that is visible to this service: the upscale request carries the file, the model, the output tier and the billed duration, and no audio settings whatsoever. The picture is what comes back.

So the workflow is remux, not repair. Keep the audio from your own export, run the picture through the upscale, and re-attach the original soundtrack in your editor. That also means this is not the tool for a disc whose soundtrack is damaged, over-modulated or out of sync — those are separate jobs with separate tools, and mixing them into one pipeline usually produces a deliverable that fails both.

One related caution: do not judge the upscale in a player that resamples audio and picture together. Check the picture against the untouched export, and check that the remuxed file still plays in the devices you intend to ship it to, because an exotic container that only your editor can open is not a deliverable.