Trim 3G2

How to Trim a 3G2 Video Online

1. Upload Your 3G2 File: Drag and drop your .3g2, .3gp2, .3gpp2, or .3gp file, or click "+ Add Files". Batch trimming is supported, so you can drop several CDMA-era clips at once.
2. Set Your Trim Range: Open the "Trim" panel and pick "Time Range". Enter the start time (HH:MM:SS) and either an end time or a duration. For tiny phone clips, even one or two seconds of trim makes a noticeable size cut.
3. Adjust File Compression (Optional): Under "File Compression" choose Quality Preset (Highest to Lowest), Target file size (%), Specific file size, Constant Bitrate, Variable Bitrate, Constant Quality (CRF), or Constraint Quality. Most legacy phone clips are already small, so default Quality Preset is usually fine.
4. Trim and Download: Click "Trim". Files are processed in your browser session — no sign-up, no watermark, no upload to a third-party cloud.

Why Trim 3G2 Files?

3G2 (also written .3gp2 or .3gpp2) is the 3GPP2 container format defined for CDMA2000 phones — the codec siblings of 3GP, but with an audio stack tuned for CDMA voice (EVRC, EVRC-B, QCELP). The format went live in 2004 and dominated camera-phone recordings on Verizon and Sprint handsets for nearly two decades. Sprint switched off its CDMA network on May 31, 2022, and Verizon decommissioned its CDMA network on January 3, 2023 — but the files those phones recorded still exist on hard drives, SD cards, and family backups, and most modern apps reject them outright.

You'd trim a 3G2 instead of converting it when:

• Pulling a 5–10 second clip from an old voicemail or family video. Verizon Visual Voicemail and certain MMS archives wrapped recordings in 3G2; trimming lets you keep just the moment that matters before sharing.
• Cleaning up archived camera-phone footage. A 2008-era Motorola RAZR or Samsung SCH clip is often 176×144 or 320×240 — trimming a 30-second clip down to 8 seconds keeps the format intact for legacy compatibility tests.
• Preparing a forensic or evidentiary excerpt. Court submissions and insurance claims sometimes require the original container preserved; trim-without-reencode keeps codec, metadata, and audio stream untouched.
• Reducing 3G2 size for an MMS-style channel. US carriers historically capped MMS attachments at roughly 600 KB to 1.2 MB; trimming a phone-recorded 3G2 down to a few seconds can hit that ceiling without re-encoding.
• Splitting a multi-event recording. Older "press record, talk, hang up" voicemails often contain several distinct clips back-to-back; trim per segment, then archive each.
• Test fixtures for video pipelines. Developers maintaining ingest code that still handles 3GPP2 inputs need short, clean clips to feed unit and integration tests.

3G2 vs 3GP — Format Comparison

Property	3G2	3GP
Standard body	3GPP2	3GPP
Network family	CDMA2000 (US: Verizon, Sprint)	UMTS / GSM (US: AT&T, T-Mobile)
First spec	2004	2001
Common extensions	.3g2, .3gp2, .3gpp2	.3gp, .3gpp
Video codecs	H.263, MPEG-4 Part 2, H.264/AVC	H.263, MPEG-4 Part 2, H.264/AVC
Audio codecs	EVRC, EVRC-B, EVRC-WB, QCELP (13K), SMV, VMR-WB, AAC-LC, HE-AAC v1, AMR-NB, AMR-WB	AMR-NB, AMR-WB, AMR-WB+, AAC-LC, HE-AAC v1/v2
HE-AAC v2 / AMR-WB+	Not supported	Supported
Typical resolution	176×144 (QCIF), 320×240 (QVGA), occasionally 640×480	176×144, 320×240, up to 800×480 on later phones
MIME type	video/3gpp2	video/3gpp

3GP and 3G2 share the same ISO base media file format root, so most modern players (VLC, MPV, QuickTime) handle either by sniffing the brand box rather than relying on the extension.

Trim Method Quick Guide

Method	What it does	When to use
Trim only (no re-encode)	Keeps original codec, audio stream, and bitrate intact	Forensic copies, preserving archival quality, fastest processing
Trim + Quality Preset	Re-encodes after cutting; pick High to Low	Quick size win without manual tuning
Trim + Target file size (%)	Aim for, e.g., 50% of source	Hitting a rough size budget
Trim + Specific file size	Aim for an exact MB ceiling	Email or upload limits
Trim + Constant Quality (CRF)	Visual-quality target (lower CRF = higher quality)	When perceived quality matters more than size
Trim + Constant/Variable Bitrate	Fixed kbps or VBR	Streaming or broadcast prep

Frequently Asked Questions

Will trimming a 3G2 re-encode the video and lose quality?

It depends on whether you change anything else. If you only set a trim range and leave File Compression and Video Resolution at their defaults, the cut is lossless on the kept frames. If you also pick a Quality Preset, target size, or new resolution, the file is re-encoded and quality changes accordingly.

Can I upload .3gp2 and .3gpp2 files, not just .3g2?

Yes. The accepted-extension list includes .3g2 and .3gp directly, and .3gp2 / .3gpp2 are aliases of .3g2 defined in the same 3GPP2 specification. If you have an unusual extension, rename to .3g2 and upload — the underlying ISO BMFF brand box is what actually matters.

Why does my old phone clip have weird audio after trimming?

Older 3G2 clips often use CDMA-only audio codecs (EVRC, QCELP, SMV) that many desktop players don't decode natively. The trim itself is fine, but if your player can't render those codecs you'll hear silence or noise. Convert to MP4 with 3G2 to MP4 to get an AAC audio track that plays everywhere.

Should I trim, or should I just convert to MP4 first?

If you want to keep the original 3G2 container for legacy compatibility (an old phone, an embedded player, an archival policy), trim as 3G2. For everything else — sharing, editing, modern playback — convert with 3G2 to MP4 instead. MP4 is the modern superset and avoids the CDMA audio-codec landmines.

What's the smallest practical 3G2 file size?

Phone-recorded 3G2 clips at 176×144 with H.263 video and AMR-NB audio land around 50–150 KB per second of footage. A trimmed 5-second clip can be under 1 MB, which fits inside the historical MMS cap of roughly 600 KB to 1.2 MB on US carriers without further compression.

Does trimming preserve metadata like recording date and GPS?

Container-level boxes such as udta and meta are kept by trim-only operations on the underlying mp4-family file. Frame-level timestamps are rewritten relative to the new start time, so the absolute "moment recorded" timestamp is preserved while playback timestamps reset to zero.

Can I trim a 3G2 and output a 3GP at the same time?

Trim-3G2 outputs a .3g2 file. To switch container while trimming, run trim first, then run 3G2 to 3GP on the output. The two formats share video codecs, so the conversion is fast and lossless when audio is AAC.

My 3G2 was recorded on a Verizon phone before 2023 — does it still work after the CDMA shutdown?

Yes. The CDMA network shutdown only ended cellular service for those handsets — it didn't change anything about files already saved to internal storage, microSD, or backups. Existing .3g2 files remain readable indefinitely; only making new recordings on a CDMA-only device became impossible.

What's a better long-term archive — keep 3G2 or convert?

For long-term archives, 3G2 to MOV (QuickTime) or 3G2 to MP4 are both better than holding the original, because the H.264 video stream inside the 3G2 lives on without the CDMA audio-codec compatibility risk. If file size is the concern, Compress 3G2 trims bitrate without changing container.