How to convert an interlaced dvd rip to progressive scan
- Step 1Rip or convert the disc to a supported file first — DVD
.VOBfiles inVIDEO_TSare MPEG-2 program streams. Remux or rip them to MP4, MKV, MOV, AVI, M4V, or TS so the deinterlacer can read them. Most rippers output MP4 or MKV directly. - Step 2Drop the ripped file onto the deinterlacer — The file loads into the in-browser FFmpeg engine — nothing uploads. A typical full-disc rip is well under the 1 GB free cap (10 GB Pro), so most rips process without a tier change.
- Step 3Keep Mode on 1 for DVD playback conversion — Mode
1(yadif=1) outputs progressive frames at the disc's native rate: PAL 25i → 25p, NTSC 29.97i → 29.97p. This preserves the runtime, which is what you want for watchable, chapter-aligned playback. - Step 4Skip Mode 0 unless you specifically want double rate — Mode
0(bob) would output 50p / 59.94p, doubling the frame count. That is rarely what you want for film-based DVD content and produces a larger file with no real benefit for drama or animation. - Step 5Run the conversion — JAD pipes the rip through yadif, re-encodes the video to H.264 at CRF 20 preset medium, and copies the audio. SD resolution keeps this reasonably quick even though it is WASM-based.
- Step 6Download and check motion + audio sync — Open the MP4, scrub to a panning scene to confirm combing is gone, and check a dialogue scene to confirm audio sync. The copied audio track stays locked to the rebuilt video.
DVD region → deinterlace settings
Both PAL and NTSC DVDs are interlaced; yadif handles each the same way. Use Mode 1 to keep playback-correct timing.
| DVD region | Typical source | Recommended mode | Output |
|---|---|---|---|
| PAL | 720×576, 25i | 1 (yadif=1) | 720×576 25p H.264 MP4, runtime unchanged |
| NTSC (video) | 720×480, 29.97i | 1 (yadif=1) | 720×480 29.97p H.264 MP4, runtime unchanged |
| NTSC (film, telecined) | 720×480, 23.976p inside 29.97i | 1 (best available) | Combing removed; native film cadence not restored (no IVTC here) |
What the tool fixes vs. what it doesn't
The deinterlacer addresses interlacing only. Other DVD-rip quirks need different tools or steps.
| DVD-rip issue | Handled here? | What to do |
|---|---|---|
| Combing on motion | Yes | Mode 1 yadif removes it |
| Wrong container (VOB) | Indirectly | Rip to MP4/MKV first; output is MP4 |
| Telecine / 3:2 pulldown cadence | No | Needs inverse telecine — out of scope |
| Letterbox black bars | No | Use the cropper |
| File too large for tier | No | Split or upgrade — see limits |
Tier limits for DVD-size files
DVD rips are SD and small; even the free tier comfortably handles a full single-layer disc.
| Tier | Max file size | Batch files |
|---|---|---|
| Free | 1 GB | 1 |
| Pro | 10 GB | 5 |
| Pro-media | 100 GB | 50 |
| Developer | 100 GB | Unlimited |
Cookbook
DVD-rip deinterlacing recipes with the exact yadif call and the expected output for each region.
PAL DVD rip to progressive
A European DVD ripped to MKV at 720×576 25i. Mode 1 keeps the 25 fps rate and removes combing.
Input: movie_pal.mkv, 720x576, 25i Mode: 1 Filter: -vf yadif=1 Output: movie_pal.mp4, 720x576, 25p, H.264, runtime unchanged
NTSC video DVD to progressive
A North-American DVD of a TV show ripped to MP4 at 720×480 29.97i. Mode 1 produces 29.97p, keeping sync with the show's timing.
Input: show_ntsc.mp4, 720x480, 29.97i Mode: 1 Output: show_ntsc.mp4 (progressive), 29.97p, AC-3 audio copied
Preserve the 5.1 audio track
DVDs commonly carry AC-3 5.1. Because audio is stream-copied, the surround track survives untouched through the deinterlace.
Input: concert.vob-remux.mkv, AC-3 5.1, interlaced Mode: 1 Video: re-encoded H.264, combing gone Audio: AC-3 5.1 copied (no re-encode), in sync Output: concert.mp4
Letterboxed film — deinterlace, then crop
Many film DVDs have hard black bars. Deinterlace first for clean motion, then remove the bars with the cropper as a second step.
Step 1: deinterlacer, Mode 1 → progressive MP4 Step 2: /video-tools/video-cropper → trim letterbox bars (The deinterlacer does not crop; bars are untouched here.)
Telecined NTSC film — combing removed, cadence not restored
A film-sourced NTSC DVD stored as 23.976p inside 29.97i. yadif removes combing but cannot rebuild the original 23.976 cadence — that needs inverse telecine, which this tool doesn't offer.
Input: film_ntsc.mkv, telecined (3:2 pulldown) Mode: 1 Result: smooth, combing-free playback at 29.97p Not done: native 23.976p recovery (no IVTC in this tool)
Edge cases and what actually happens
DVD stored as raw VOB files
Prep neededRaw .VOB files from VIDEO_TS are MPEG-2 program streams that the tool may not demux cleanly. Rip or remux to MP4/MKV/TS first (most DVD rippers do this), then drop the result in. Output is always MP4.
Telecined film DVD
LimitedIf the disc is film telecined to 29.97i (3:2 pulldown), the ideal fix is inverse telecine to recover 23.976p. This tool only runs yadif, which removes combing but keeps 29.97p. The result is watchable; it just isn't the native film cadence.
Output is MP4, not the input container
By designWhatever you feed in (MKV, MOV, AVI), the deinterlaced result is H.264 MP4. This is fixed. Re-encode to another container afterwards with the transcoder if needed.
Audio in a format the MP4 container dislikes
RareAudio is stream-copied. Most DVD audio (AC-3, AAC) muxes into MP4 fine; DTS is less universally supported in MP4 players. If audio won't play after deinterlacing, extract and re-encode it with the audio track extractor.
Already-progressive DVD (rare authoring)
AvoidA small number of DVDs are authored progressive. Deinterlacing those just softens the picture with no combing to remove. Check a paused motion frame for combing before running.
Rip exceeds the tier cap
RejectedFull DVD rips are usually under 1 GB, but a high-bitrate dual-layer rip can exceed the free cap. Pro raises it to 10 GB. Over the cap, the file is rejected before processing.
Letterbox bars remain after deinterlacing
ExpectedThe deinterlacer does not crop. Black bars in the source remain in the output. Use the cropper as a separate step to remove them.
Wrong field order causes juddery motion
Rareyadif auto-detects field order. A mis-flagged rip can judder; there's no manual TFF/BFF control here. Re-rip with corrected field-order metadata if it happens.
Decode error on an exotic codec
ErrorIf the rip uses a codec the WASM build can't decode you'll get a Deinterlace failed log tail. Remux to a standard H.264/MPEG-2 MP4 first, then deinterlace.
Frequently asked questions
Why is my DVD rip showing comb lines on my laptop?
DVDs store interlaced video (PAL 25i, NTSC 29.97i). On a CRT the fields painted in sequence and looked fine; on a progressive laptop/phone/TV screen the two fields show at once, so motion combs. Deinterlacing with yadif rebuilds proper progressive frames and removes the combing.
Which mode should I use for a DVD?
Mode 1. It runs yadif=1, keeping the disc's native frame rate (25p for PAL, 29.97p for NTSC) so the runtime and chapter timing don't change. Mode 0 (bob) doubles the rate and is rarely useful for DVD content.
Can I drop a VOB file straight in?
Often not cleanly — VOBs are MPEG-2 program streams. Rip or remux the disc to MP4/MKV/TS first (most DVD rippers do this automatically), then deinterlace. Recognised inputs are MP4, MOV, MKV, WEBM, AVI, M4V, and TS.
Will my surround audio survive?
Yes. Audio is stream-copied (-c:a copy), so an AC-3 5.1 or AAC track is preserved bit-for-bit and stays in sync. Only the video is re-encoded. (DTS plays in fewer MP4 players, so test it if your rip uses DTS.)
What resolution and codec does the output use?
The same resolution as the source (the deinterlacer doesn't scale), re-encoded to H.264 at CRF 20 preset medium, in an MP4 container. So a PAL rip stays 720×576 and an NTSC rip stays 720×480.
Can it restore the original film frame rate (23.976)?
No. Recovering 23.976p from a telecined NTSC DVD needs inverse telecine, which this tool doesn't offer. yadif removes the combing but leaves the clip at 29.97p. For everyday playback that's usually fine.
Does this remove the black letterbox bars?
No. The deinterlacer only deinterlaces. Bars in the source remain. Remove them afterwards with the cropper.
Is my disc content uploaded?
No. Everything runs in your browser via FFmpeg.wasm. The rip never leaves your machine, which suits personal archive discs.
How long does a full disc take?
SD resolution keeps it manageable, but this is FFmpeg.wasm (CPU-bound, no hardware acceleration for yadif), so a full-length film can take several minutes. Keep the tab open while it runs.
Can I change the output to MKV?
Not from this tool — output is always MP4. Run the MP4 through the transcoder to land in another container.
How big can the rip be?
Free allows 1 GB per file, Pro 10 GB, Pro-media and Developer 100 GB. Most single-layer rips fit the free tier; a high-bitrate dual-layer rip may need Pro.
What if I only need one chapter?
Extract the section first with the lossless trimmer (it stream-copies at keyframe boundaries, no quality loss), then deinterlace just that clip to save processing time.
Privacy first
Every JAD Video tool runs entirely in your browser via WebCodecs and FFmpeg (WebAssembly). Your video files never leave your device — verified by zero outbound network requests during processing.