Video and audio repair guides

Repair a corrupted MP4 or MOV video in your browser. Rebuilds the missing index of recordings cut off by a dead battery or crash. Free preview, no upload.

Getting "moov atom not found" in ffmpeg, VLC or your editor? Learn what it means and rebuild the missing moov atom in your browser with a free preview.

Repair an MP4 file that will not play. Rebuilds the index of corrupted or truncated MP4 videos (H.264, HEVC, AAC) in your browser. Free preview, no upload.

iPhone Voice Memo will not play, shows 0:00 or stopped when the battery died? Repair the M4A file in your browser and hear a free preview first.

Repair a corrupted or unplayable MOV video from an iPhone or camera. Rebuilds the QuickTime index (HEVC, H.264, AAC) in your browser with a free preview.

Your phone, camera, drone or OBS recording won't play? Learn the causes (missing index, cut-off recording, codec) and how to fix the file in your browser.

Android video won't play after the phone died or the camera crashed? Find hidden .pending files, then rebuild the MP4 index with a reference from the same phone.

Canon EOS clip won't open after the battery died or the card filled up? Which Canon formats can be repaired, and how to rebuild the index with a reference clip.

CCTV or DVR export won't play? Most are proprietary formats that need the vendor player. When the export is a real MP4 that was cut off, the index can be rebuilt.

Dashcam clip won't play after a crash or power cut? Stop loop recording, find event files, check the format, then rebuild the MP4 index from another clip.

DJI MP4 or MOV broken after a crash or power loss? Let the aircraft recover it, export the app cache, then rebuild the index with a matching reference clip.

Drone footage broken after a crash or battery loss? Brand-by-brand checklist for Autel, Skydio, Parrot and FPV cameras, plus how to rebuild MP4/MOV files.

GoPro MP4 won't play after a dead battery or crash? Use the in-camera SOS repair, then rebuild the file index with a matching reference clip. Model-by-model tips.

Insta360 recording cut off or showing as damaged? Try Insta360's own repair first, then rebuild single-lens MP4 files with a reference. What works for .insv.

iPhone video won't play, shows 0:00 or an error? Rule out iCloud and HEVC issues first, then rebuild the MOV index with a reference from the same iPhone.

Nikon Z or DSLR video won't open after power loss or a card error? See which Nikon formats are repairable and how to rebuild the MOV/MP4 index safely.

OBS crashed and the MP4 won't open? Check whether it is MKV or hybrid MP4 first, then rebuild a plain MP4 with a 10-second reference made with the same settings.

Premiere Pro or Media Encoder crashed and the MP4 won't open? Re-export is the best fix; if the project is gone, rebuild the partial MP4 with a matching reference.

Sony Alpha, ZV or FX clip broken after power loss? Let the camera recover it, then rebuild the XAVC S or XAVC HS MP4 index with a matching reference clip.

Zoom local recording stuck as .zoom files or the MP4 won't open? How to run the converter, where cloud copies live, and when an MP4/M4A index rebuild helps.

Getting "moov atom not found" in ffmpeg, VLC or your editor? Learn what it means and rebuild the missing moov atom in your browser with a free preview.

A 0-byte or 0 KB MP4 holds no video, so repair tools cannot help, but the footage may still be on the card. How to check, recover and avoid empty video files.

Windows says "This video file cannot be played. (Error code: 0xc00d36c4)"? Five causes: missing codec, unsupported format, file location, DRM, or a broken MP4 index.

FFmpeg or ffprobe says "Invalid data found when processing input"? Find out if the file is truncated, missing its moov atom, another format or empty.

"File is not supported", "unsupported format" or "QuickTime can't open" errors: tell codec problems from real corruption in 2 minutes and fix each one.

Looking for a Wondershare Repairit alternative? Compare upload vs local processing, formats, sample files and pricing models, and when FixMP4 is the better pick.

Comparing Stellar Repair for Video with FixMP4: install vs browser, sample/reference files, formats, pricing model and when each one is the better choice.

Untrunc fixes truncated MP4s from the command line. Compare it with web uploads and with FixMP4, which rebuilds the index in your browser with a free preview.

What VLC can really fix (broken AVI indexes, playback of damaged files) and what it cannot (MP4 with no moov atom). Step-by-step VLC tricks plus the fix for MP4.