Trim AVI

How to Trim AVI Videos Online

1. Upload Your AVI File: Drag and drop or click "+ Add Files" to load your AVI video. The trimmer accepts DivX, Xvid, MJPEG, MPEG-4, uncompressed (BMP/RGB), and H.264-in-AVI streams. Batch upload is supported.
2. Set the Time Range: Under "Trim," choose "Time Range" and enter a start time and duration in seconds (e.g., start 120, duration 60 extracts the segment from 2:00 to 3:00). Decimal values are accepted for sub-second precision.
3. Pick a File Compression Mode (Optional): Choose Quality Preset (Highest to Lowest), Target file size (%), Specific file size, Constant Bitrate (CBR), Variable Bitrate (VBR), Constant Quality (CRF — try 18 for near-lossless, 23 for a balanced default, 28 for smaller files), or Constraint Quality.
4. Adjust Resolution and Trim: Under "Video resolution," keep the original, pick a preset (1080p, 720p, 480p, 360p), or enter exact width/height. Click "Trim" — files process in your browser session with no watermark and no sign-up.

Why Trim AVI Files?

AVI (Audio Video Interleave) is Microsoft's container format, introduced on November 10, 1992 as part of Video for Windows. Three decades on, AVI is still common for DivX/Xvid movie archives, dashcam and CCTV footage, screen-capture output from older versions of Bandicam and Camtasia, and DV camcorder transfers. These sources tend to produce long, continuous recordings — exactly the files that need a clean trim before they go anywhere else.

• DivX / Xvid movie archives — Pull a single chapter or scene out of a 90-minute MPEG-4 ASP rip without re-converting the whole file. CRF 18 keeps the cut visually indistinguishable from the source.
• Dashcam and CCTV footage — Surveillance and dashcam systems frequently record to AVI in 5-minute or 10-minute segments. Trim to the seconds around an incident before sending to insurance or law enforcement.
• Screen recordings — Older screen-capture tools (Bandicam, Camtasia 8 era, AVS) write to AVI. Cut the dead time at the start, end, or middle of a tutorial before publishing.
• DV / HDV camcorder transfers — DV-AVI captures from MiniDV / HDV tapes are roughly 13 GB per hour at 25 Mbps. Trim out blank tape and stop-and-start junk before sharing or archiving.
• Game capture clips — Trim a 5-second highlight out of a long FRAPS or Bandicam recording to send over Discord (10 MB free / 25 MB Nitro Basic) or post to a forum.
• Email and chat attachments — A 90-second clip at 720p / CRF 23 typically lands under 25 MB, which fits Gmail and Outlook attachment limits without a Google Drive / OneDrive hand-off.

AVI vs MP4 vs MKV — Container Comparison

Property	AVI	MP4	MKV
Released	Nov 10, 1992 (Microsoft)	2001 (ISO/IEC 14496-14)	2002 (open standard)
Typical codecs	DivX, Xvid, MJPEG, MPEG-4	H.264, H.265, AV1, AAC	H.264, H.265, AV1, FLAC
B-frame support	Unreliable (RIFF chunk timing)	Yes	Yes
Subtitles in container	No (external .srt only)	Yes (mov_text, tx3g)	Yes (SRT, ASS, PGS)
Multiple audio tracks	Limited / nonstandard	Yes	Yes (unlimited)
Chapters / metadata	Minimal	Yes	Yes (rich)
Streaming / web playback	No (not browser-native)	Yes (HTML5 native)	Limited
Best for	Legacy archives, DV capture	Sharing, web, mobile	Multi-track storage

File Compression Quick Guide

Mode	What it does	When to use
Quality Preset (Highest–Lowest)	One-click visual quality target	Quickest path; "Very High" matches most source DivX/Xvid quality
Target file size (%)	Output is N% of input size	"Cut and shrink to 50%" for email/Discord shares
Specific file size	Pin exact MB output	Hitting a hard cap (e.g., 25 MB Gmail)
Constant Bitrate (CBR)	Steady kbps throughout	Streaming targets where rate must stay flat
Variable Bitrate (VBR)	Bits flex with scene complexity	Best size-vs-quality on mixed motion content
Constant Quality (CRF)	Same perceived quality everywhere	Most efficient default; CRF 18 archive, 23 balanced, 28 small
Constraint Quality	Quality with a max-bitrate ceiling	Quality-first, but safe for bitrate-limited devices

Frequently Asked Questions

Does this trim AVI losslessly without re-encoding?

XConvert re-encodes when you change resolution, codec, or bitrate. For pure stream-copy trimming (no quality loss, instant cuts), use Quality Preset "Highest" with the original resolution — that produces the closest-to-source output a browser-side trim can deliver. True frame-accurate stream-copy editing requires desktop tools like LosslessCut, VirtualDub, or Avidemux, which align cuts to keyframes.

Why does my trimmed AVI start a few frames late or have a brief glitch?

AVI with B-frame codecs (Xvid, DivX, MPEG-4 ASP) only allows clean cuts on keyframes (I-frames). If you cut between keyframes, the decoder needs the previous I-frame plus B/P-frame chain to reconstruct the first second. XConvert re-encodes around the cut to give frame-accurate output, which avoids this artifact entirely — the tradeoff is a re-encode pass.

What AVI codecs are supported?

The trimmer reads AVI containers carrying DivX, Xvid (MPEG-4 ASP), MJPEG, MPEG-4 Part 2, uncompressed RGB / BMP, DV (DV-AVI from MiniDV / HDV camcorders), and the rare H.264-in-AVI streams. Audio inside AVI is typically MP3, AC-3, or PCM.

My AVI is over 4 GB. Will it work?

Original 1992 AVI had a 2 GB practical limit; the OpenDML extension (Matrox, February 1996, sometimes labeled "AVI 2.0") raised this to terabytes. Most modern AVI files use OpenDML and trim fine. If you have a true legacy pre-1996 AVI hitting the 2 GB ceiling, the file is usually already truncated.

Should I trim as AVI or convert to MP4?

For sharing or web embedding, MP4 wins — every browser, phone, and TV plays H.264 MP4 natively. Trim and convert in one pass with AVI to MP4. Keep AVI if you need to drop the file back into legacy Windows software, an existing DivX/Xvid library, or a video-editing project that expects the original container.

Can I trim and compress at the same time?

Yes — that's the main reason to use a re-encoding trimmer over a stream-copy one. Combine "Time Range" with "Target file size (%)" at 50% to roughly halve the output, or set CRF 23 in Constant Quality mode for a clean balance. For larger files, the dedicated Compress AVI tool gives more bitrate-tuning headroom on the full file.

Will the trimmed file include subtitles?

AVI does not store subtitles inside the container — they live in a separate .srt file alongside the video. The trim only affects the AVI itself, so you'll need to retime or re-cut the .srt manually (or convert the package to MKV with AVI to MKV, which embeds subtitles natively).

Does AVI support multiple audio tracks (e.g., commentary)?

Multiple audio tracks in AVI are technically possible via the RIFF spec but poorly supported across players — most decoders only read the first track. If your source has commentary or multi-language tracks, trimming through MKV preserves all of them; AVI may drop the extras. For multi-track sources, AVI to MKV is the safer path.

What's the largest file I can trim?

The free trimmer handles AVIs typical of dashcam, screen-recording, and DV-camcorder workflows in a single browser session. For DV-AVI captures (~13 GB/hour) or long surveillance pulls, trim in shorter passes — your browser tab's memory is the practical ceiling, not a hard server limit.

Can I trim other video formats the same way?

Yes — XConvert offers the same trim controls for MP4 and MOV sources. The compression and resolution options carry over identically; only the output container changes.