Step 1: Provide your DivX files using the button above or by toss and let go.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Fetch your converted MKV files.
DivX to MKV Conversion FAQ
How do I convert DivX to MKV without re-encoding the video stream?
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When the DivX and MKV containers can both carry the same codec (H.264, H.265, VP9, AV1), the converter falls back to a remux: the elementary streams are copied byte-for-byte into the MKV container and only the wrapper changes. A remux of a 1 GB DivX into MKV typically finishes in 5-15 seconds with zero quality loss. DivX content is MPEG-4 Part 2 video, usually wrapped in AVI, with MP3 or AC-3 audio alongside it. MKV is codec-agnostic: H.264, HEVC, VP9 and AV1 video sit happily beside AAC, FLAC, Opus, DTS or Dolby audio in the same file.
My DivX footage shows comb lines on movement — will that carry into the MKV?
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It will unless you deinterlace, and DivX content very often is interlaced because the format comes from the broadcast and DVD era. Interlaced frames store two half-height fields captured a fiftieth of a second apart; on a progressive-scan phone or monitor that reads as horizontal combing on anything that moves. Turn on the deinterlace option and the encoder weaves the fields into whole progressive frames before writing the MKV. DivX names a codec rather than a container — an MPEG-4 Part 2 implementation that made ripping a DVD to a single CD possible around 1999.
My DivX recordings are split into numbered parts — does MKV have the same limit?
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No, and that is one of the better reasons to move. The DivX container has a practical single-file ceiling that long or high-bitrate recordings run straight into, which is exactly why old captures arrive as part1, part2, part3. MKV has no equivalent limit, so the pieces can be rejoined into one continuous file. DivX needs roughly twice the bitrate of H.264 for the same quality and has no path to HDR, 10-bit colour or resolutions beyond 1080p.
Can I add selectable subtitles once the file is MKV?
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Yes. DivX has no usable soft-subtitle track, so subtitles for DivX content had to be burned into the picture or shipped as a separate sidecar file. MKV carries subtitles as their own selectable stream, so after conversion you can attach an SRT track the viewer can switch on, switch off or restyle.
Does MKV support chapter markers that DivX did not?
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It does. MKV stores chapters as container metadata, so a long recording can be navigated by section instead of by scrubbing a progress bar. DivX has nowhere to put that information, so if the source shipped with a chapter list it was in a sidecar file — hand that to the converter and it gets written into the MKV. MKV is the archival container of choice because it stores unlimited audio tracks, soft subtitles, chapter markers and cover art in one file.
Is MKV a container or a codec, and does that change what I get back?
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It changes what to expect from the output file. One side of this conversion names an encoding rather than a wrapper, so what comes back is that bitstream inside whichever container suits it best — normally MP4 or MKV. The extension reflects the container; the codec is what actually determined the file size and where it will play.
Will multi-track audio survive DivX to MKV conversion?
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Yes — every audio track in the DivX (director commentary, alternate languages, descriptive audio) is preserved in the MKV when the target container supports multi-stream audio. MKV and MOV handle unlimited audio tracks; MP4 supports many but some hardware players only see track 1; WebM is capped at one Opus / Vorbis track. MKV is Matroska, an open container designed in 2002 with no licensing restrictions and no ceiling on what it can hold.
Are subtitle tracks preserved when converting DivX to MKV?
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Soft subtitles (selectable tracks) survive when MKV can carry them: MKV holds SRT, ASS, SSA, PGS, VobSub natively; MP4 only holds mov_text (a stripped-down format). Converting an MKV with ASS styled subs to MP4 will typically downgrade them to mov_text or burn them in. Hardsubs (burned into the video) carry over regardless.
Does DivX to MKV keep chapter markers / DVD-style navigation?
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Chapter metadata transfers between DivX and MKV whenever both containers support a chapter atom (MKV, MP4, MOV). WebM stores chapters in a Matroska-compatible block, so MKV <-> WebM chapters round-trip cleanly. AVI has no chapter spec at all, so an AVI source arrives with no chapters to carry across and an AVI target cannot store the ones it was handed; add markers manually afterwards if you need them.
What about MKV attachments (fonts, cover art) when going DivX to MKV?
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MKV is the only mainstream container that stores arbitrary attached files (TTF fonts for ASS subs, JPG cover art, fan-translated PDF inserts). Going from DivX to MKV drops these attachments when MKV is not MKV — the elementary streams convert, but the attached payload stays in the source. Keep DivX as a backup if you depend on attached fonts.
Which codec does the MKV output use by default?
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The default codec is chosen to match the MKV container conservatively: MKV defaults to H.265 (HEVC) for better compression; MP4 defaults to H.264 for the widest device support; WebM defaults to VP9; AVI uses MPEG-4 ASP (DivX/Xvid lineage). Override via the advanced codec dropdown — AV1 is available for MKV / WebM where you want maximum compression and can wait through the encode. MKV has almost no native hardware support — phones, browsers and TVs usually need VLC or a remux before they will play it.
How does HDR (HDR10, Dolby Vision) survive DivX to MKV?
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HDR static metadata (HDR10 mastering display values, max content light level) carries through to MKV when both containers and the chosen codec support it (HEVC, AV1 in MKV / MP4). Dolby Vision is more fragile — DV profile 5 / 7 / 8.1 in DivX commonly survives only into MKV with HEVC; converting to an MKV container that does not carry the DV layer flattens to HDR10.
