Avid Media Composer editing: film guide

Table of Contents

Express Checklist Before Opening a Project

• Verify hard drive is connected (Thunderbolt/USB-C) BEFORE launching Avid.
• Folder structure followed to the letter: Drive Root > Avid MediaFiles > MXF > 1.
• User Profile: Never use 'Default' settings or another editor's profile. Create your own.
• Project Format: Check Frame Rate (24/25) and Raster Dimension (1080p/UHD) before any import.
• Disable computer and hard drive sleep mode in the OS settings.
• Verify that the keyboard language (OS) matches your Avid mapping.
• If using a Blackmagic/AJA card, check driver compatibility with your Avid version.

Common Bugs and Solutions

Most Avid issues stem from media database management.

Media Offline (Red Screen 'Media Offline')

Symptoms:

Clips are red in the timeline or bin.

Cause :

Corrupted database or moved files.

Fix:

Go to folder: Drive > Avid MediaFiles > MXF > 1 (and other numbered folders). DELETE files 'msmMMOB.mdb' and 'msmFMID.pmr'. Restart Avid. It will rescan and rebuild a clean database.

Media Scan Not Starting

Symptoms:

You added MXF files but Avid doesn't see them and doesn't scan at startup.

Cause :

Wrong folder structure.

Fix:

The path MUST be exactly: Drive Root > Avid MediaFiles (no space after Avid) > MXF > Number (e.g., 1). If it's in a subfolder 'Footage', Avid will never see it.

Crash Opening a Bin / Exception Error

Symptoms:

Avid quits unexpectedly or shows 'Exception: DOMAIN_COPYout_OF_RANGE'.

Cause :

Corrupted bin or font issue.

Fix:

Create a new blank Bin. In Finder/Explorer, copy the .avb file of the corrupt bin elsewhere. Open the new bin and try importing sequences from the Attic (auto backup).

Audio Desync / Drift

Symptoms:

Sound gradually drifts out of sync.

Cause :

Mixed sample rates (44.1kHz vs 48kHz).

Fix:

Check 'Project Settings > Audio Project'. Ensure you are at 48kHz. Transcode all 44.1kHz audio to 48kHz before editing.

Playback Stuttering

Symptoms:

Playback stops, drops frames (red/yellow lines).

Cause :

Using 'Link' (AMA) on heavy codecs (H.264, H.265) without transcoding.

Fix:

Avid dislikes native H.264. 'Transcode' your footage to DNxHD 36 (LB) or DNxHR LB for editing. This is imperative for fluidity.

Relink / Relocate Issues

Symptoms:

Cannot link offline clips to original files.

Cause :

Different Timecode or missing 'Tape Name'.

Fix:

Select clips > Right click > Relink. Check 'Relink to selected items in open bins' if you have target footage open. Verify 'Ignore extension' is checked.

Effects with a Red Dot (Render)

Symptoms:

Effect does not play in real-time.

Cause :

Effect requires calculation (Render).

Fix:

Select effect in timeline > Clip Menu > Render In/Out. If persistent, check Render Disk in 'Media Creation'.

Export Errors (Exception / Segmentation Fault)

Symptoms:

Export crashes at X%.

Cause :

Corrupt media at that point or full drive.

Fix:

Perform a 'Video Mixdown' of your video track. If the Mixdown crashes, you found the corrupt clip. Then export the sequence using the Mixdown.

Attic / Autosave Not Saving

Symptoms:

You lose work after a crash.

Cause :

Misconfigured 'Bin Settings'.

Fix:

Go to Settings > User > Bin. Set 'Auto-Save interval' to 5 or 10 minutes. Also check that the 'Avid Attic' folder is not read-only.

General Instability Signs

Symptoms:

Weird bugs, disappearing windows.

Cause :

Corrupted User Profile (very common in Avid).

Fix:

Don't search further: create a NEW User Profile. This solves 50% of unexplained Avid problems.

Import, Link (AMA) & Transcode

Understanding how to get footage in is crucial.

Feature Film Best Practices

Frequently Asked Questions (FAQ)

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