Convert Digitized Home Videos to MP4: Clean Up Old Tapes

You finally had the shoebox of tapes — VHS, Hi8, a stack of MiniDV — digitized, either yourself with a USB capture device or through a transfer service. Now you’re staring at a folder of files that are somehow both enormous and unplayable: a multi-gigabyte .AVI that stutters on your laptop, .MPG clips your phone won’t open, or a VIDEO_TS folder full of .VOB files from a burned DVD. This guide sorts out what you got back, how to turn it into small MP4s that play everywhere, and what converting can’t do — it can’t turn standard-def tape into HD. We verified the codec, resolution, and format facts against the ITU, the Library of Congress, and caniuse.

Quick answer: Digitized tapes usually come back as AVI (often the lightly-compressed DV codec, from a MiniDV or capture-device transfer), MPG/MPEG (MPEG-2), or VOB (MPEG-2 on a home-movie DVD). All three are old, bulky, and awkward to play or upload. Convert them to MP4 (H.264) for a file that plays in every browser, on iPhone and Android, and in editors — usually at a fraction of the size. One caveat: these are standard-definition captures (720×480 or 720×576), so converting makes them play everywhere but can’t make them HD, and interlaced footage may show comb-like lines on motion.

Jump to a section

• First, identify what you got back
• Convert to MP4: smaller and plays everywhere
• The standard-def reality: don’t expect HD
• Archive smart: one master, many copies
• Convert your digitized videos on xconvert
• FAQ

First, identify what you got back

The extension tells you where the file came from and what’s inside it — which decides how you convert it.

A few things worth knowing about each:

• AVI with DV inside is the classic MiniDV transfer. The Library of Congress describes DV as a format “developed in the early 1990s as a media-dependent videocassette format” whose video “signals are compressed using discrete cosine transforms (DCT) within each frame” and that “does not use frame-to-frame temporal encoding.” In plain terms: DV compresses every frame on its own, like a string of JPEGs, with none of the frame-to-frame savings modern codecs rely on. That’s why a DV .AVI runs to many gigabytes — and exactly why re-encoding to H.264 shrinks it so dramatically. (Raw .dv/.dif captures hold the same DV data without a friendly wrapper — treat them like the AVI/DV case.)
• MPG/MPEG is MPEG-2. Many capture cards and standalone recorders wrote MPEG-2, the same codec DVDs use. It’s more efficient than DV but still a generation behind H.264.
• VOB is a DVD in disguise. If your footage was burned to a disc, the video lives in .VOB files inside the VIDEO_TS folder. Per the Library of Congress, “DVDs and SVCDs use program streams” — VOB is the MPEG-2 program-stream container built to play in a set-top DVD player, not to double-click on a laptop. For how VOB differs from Blu-ray/camcorder .M2TS/.MTS, see VOB, M2TS, and MTS explained.

If your camcorder was a high-definition model that recorded .MTS/.M2TS (AVCHD), that’s a different, already-HD case with a nearly lossless conversion. This guide is about the standard-definition captures above.

Convert to MP4: smaller and plays everywhere

Whatever you started with, the destination is the same: MP4 with H.264 video (and AAC audio). It’s the modern default for a reason.

• It plays everywhere. H.264/MP4 has roughly 96.9% global browser support per caniuse — it works in Chrome, Edge, Firefox, and Safari, and natively on iPhone and Android. AVI, MPG, and VOB have no equivalent: browsers won’t play them, phones usually reject them, and editors often stumble on them.
• It’s much smaller. DV and MPEG-2 are old and weakly compressed. Re-encoding to H.264 typically produces a far smaller file at the same visual quality — the win is biggest with DV .AVI, which barely compresses at all.
• It’s a true re-encode, not a rename. MP4 can’t just “hold” DV or MPEG-2, so the converter decodes the old codec and re-compresses it as H.264 — which takes a little processing time and is why the file shrinks so much. A tool that finishes an AVI or VOB conversion instantly isn’t really converting it. For the full why-AVI-is-big story, see Convert AVI to MP4.

The standard-def reality: don’t expect HD

This is the part that surprises people, so it’s worth being blunt: your captures are standard definition, and converting can’t change that.

Analog tape and early digital camcorders were built to the ITU-R BT.601 standard, which defines the SD frame as 720×480 for NTSC (525-line/60 Hz — North America, Japan) and 720×576 for PAL (625-line/50 Hz — most of Europe). That’s all the detail the tape ever held. Choosing a 1080p or 4K preset doesn’t add detail — it just stretches the same pixels over a bigger grid, often looking softer, not sharper. Keep the original resolution; an AI upscale, if you want one, is a separate step with its own tradeoffs.

The other SD-era gotcha is interlacing. BT.601 video is interlaced: each frame is actually two “fields” of alternating scan lines, captured a fraction of a second apart. On the old CRT TV they were meant for, that’s invisible. On a modern progressive screen, showing both fields together makes fast motion look like it’s split by fine horizontal teeth — the artifact everyone calls combing.

Fixing combing requires a deinterlacing pass, which merges or interpolates the two fields into clean progressive frames. The cleanest place to do it is at capture time — most capture programs offer a deinterlace option, and getting it right there beats fixing it later. If your files already show combing, deinterlacing has to happen during a re-encode. Be aware that a straightforward format converter (xconvert’s included) changes the container and codec but doesn’t expose a dedicated deinterlace filter, so for stubborn combing you may need a desktop tool with an explicit deinterlace setting. If your footage looks clean in motion, you don’t need to worry about any of this.

Archive smart: one master, many copies

Your digitized tapes are unrepeatable, so treat the first good conversion as an archival master and make lighter copies from it:

1. Make one high-quality master. Convert at a high quality setting and keep the original resolution — this is the copy you back up (an external drive and cloud) and never touch again.
2. Make smaller share copies from the master. For emailing relatives or posting to a family group, create a compressed MP4 — a lower bitrate or a target size. Always compress from the master, not from a copy of a copy: every lossy re-encode throws away a little more.

If a share copy is still too big, run the master through the MP4 compressor and target a specific size rather than dropping the resolution.

Convert your digitized videos on xconvert

The xconvert AVI to MP4 converter handles the most common case — a DV or older-codec .AVI — and the sibling MPG and VOB tools work the same way for those formats:

1. Open xconvert.com/convert-avi-to-mp4 and click + Add Files to upload your capture — From my Computer, From Google Drive, or From Dropbox. (For an .MPG, use the MPG tool; for a DVD, copy the .VOB files off the disc first, then use the VOB tool.)
2. The defaults produce a clean H.264 MP4 — the page notes “Our defaults are optimized for the best results.” To change anything, open Advanced Options (the gear).
3. For your archival master, leave Quality Preset on Very High (Recommended). For a smaller share copy, switch the mode to Constant Quality, Variable Bitrate, or Specific file size and enter a target in MB.
4. Under Video resolution, keep Keep original — your source is standard-definition, so a 1080p or 4K preset would only upscale it. Use Trim → Time Range to cut blank tape or color bars off the head and tail.
5. Click Convert and download your MP4. Because DV and MPEG-2 re-encode frame by frame, allow a little extra time on longer tapes.

Your file uploads over an encrypted connection, is processed on our servers, and is deleted automatically a few hours later. Nothing lingers.

FAQ

What file format do digitized home videos come in?

Most commonly AVI, MPG/MPEG, or VOB. A MiniDV camcorder transfer (and many VHS/Hi8 capture devices) produces an .AVI, often holding the lightly-compressed DV codec; capture cards frequently write MPEG-2 .MPG files; and footage burned to a DVD lives as .VOB files in the disc’s VIDEO_TS folder. All three are standard-definition and best converted to MP4 (H.264) for playback and sharing.

Why is my digitized video interlaced, with comb-like lines on motion?

Because analog tape and SD camcorders recorded interlaced video under the ITU-R BT.601 standard — each frame is two fields of alternating scan lines, captured moments apart. Old TVs displayed them seamlessly; modern progressive screens show both fields at once, producing the fine horizontal “teeth” called combing on fast motion. The fix is a deinterlacing pass, ideally done at capture time or during a re-encode with an explicit deinterlace filter.

Can converting make my old VHS or tape captures HD?

No. SD captures are 720×480 (NTSC) or 720×576 (PAL) per ITU-R BT.601 — that’s the maximum detail the tape ever held. A 1080p or 4K preset only stretches the existing pixels; it can’t invent detail that was never recorded, and it often looks softer. Keep the original resolution. (A dedicated AI upscaler is a separate step, with mixed results on grainy tape.)

Will converting to MP4 lose quality?

There’s a theoretical loss because it’s a re-encode, but with a high quality preset it’s usually imperceptible — you’re trading a weak old codec (DV or MPEG-2) for the far more efficient H.264. The safe approach is to make one high-quality master at the original resolution, back it up, and create any smaller share copies from that master rather than re-converting the raw capture repeatedly.

How do I convert a whole DVD folder of VOB files?

Copy the .VOB files off the disc first (they sit in the VIDEO_TS folder), then run them through the VOB to MP4 converter. DVD authoring often splits one recording across several 1 GiB .VOB files (VTS_01_1.VOB, VTS_01_2.VOB, …), so a single home movie may span a few files — see VOB, M2TS, and MTS explained for how the disc structure works.

Why are my DV AVI files so huge?

Because DV is only lightly compressed. The Library of Congress notes DV compresses “within each frame” and “does not use frame-to-frame temporal encoding” — so unlike H.264, it gets no savings from one frame to the next, leaving very large files. Converting to H.264 in an MP4 is exactly what shrinks them — typically to a small fraction of the original size at the same visual quality.

Sources

Last verified 2026-07-16.

• ITU-R BT.601 — Studio encoding parameters of digital television for standard 4:3 and wide-screen 16:9 aspect ratios — the standard-definition digital video standard: 720×480 (525-line/60 Hz, NTSC regions) and 720×576 (625-line/50 Hz, PAL regions), interlaced.
• Library of Congress — Digital Video Encoding (DV, DVCAM, DVCPRO) — DV developed in the early 1990s as a videocassette format; compressed with DCT “within each frame” and “does not use frame-to-frame temporal encoding”; DV-DIF data stored raw (.dif) or wrapped in AVI, QuickTime, and MXF.
• Library of Congress — MPEG-2 Program Stream — “DVDs and SVCDs use program streams”; a mechanism to multiplex a single program’s video and audio for storage on optical media — the container VOB is built on.
• caniuse — MPEG-4/H.264 video format — ~96.9% global browser support; plays in Chrome, Edge, Firefox, Safari, and natively on iOS and Android.
• MDN — Media container formats — MP4 is broadly supported and holds H.264/AAC; AVI and MPEG program/transport streams are not web-native formats.