What If the Recognition of Subtitles Is Stuck at 99%?

CapCut Online

Step 1: Do not refresh or navigate away

• The web version processes recognition entirely on remote servers. Refreshing the page cancels the job.
• Even if the UI shows "99%" for several minutes, the server may still be working.

Step 2: Check browser and network stability

• Use Chrome or Edge at 100% zoom with no ad blockers.
• A dropped WebSocket connection can break the final callback from the server.

Step 3: Wait 5–10 minutes, then check again

• Server-side queues may delay completion during peak hours.
• After waiting, click outside the modal or switch tabs—sometimes the UI just needs a redraw to show "Completed."

Step 4: Try a different browser or incognito mode

• Corrupted browser cache or extensions (e.g., privacy tools) can interfere with real-time status updates.
• Test in Incognito/Private Mode to rule out extension conflicts.

Step 5: Reduce video length before upload

• Web version has stricter limits (～15-minute max recommended).
• Trim your video in another tool before uploading if it exceeds this.

📍 Tip: CapCut Web does not support offline recognition—a stable, high-speed connection is essential throughout the entire process.

CapCut Desktop (Windows / macOS)

Step 1: Monitor system resources

• Open Task Manager (Windows) or Activity Monitor (macOS). If CPU or RAM usage is maxed out, the app may freeze during final caption rendering.

📍 Tip: Close other heavy applications (e.g., browsers, video players).

Step 2: Wait up to 3–10 minutes

• Desktop handles longer videos better, but 99% hang can still occur with 4K footage or multi-track audio.
• The progress bar may not update, but processing continues in the background.

Step 3: Restart CapCut without saving

• If truly frozen (no disk/CPU activity for >5 minutes), force-quit CapCut.
• Upon relaunch, open the same project—CapCut often auto-saves intermediate recognition results.

Step 4: Update or reinstall CapCut

• Older versions (pre-v6.0) had known bugs where 99% hang occurred due to corrupted ASR cache.
• Go to Help > Check for Updates or download the latest version.

Step 5: Pre-process audio externally

• For problematic files, export audio as a clean WAV/MP3, enhance clarity in Audacity, then re-import and run subtitle recognition on the cleaned track.

📍 Tip: Desktop supports local ASR in some regions—ensure your language pack is fully downloaded under Settings > Language & Speech.

CapCut Mobile App (iOS / Android)

Step 1: Wait patiently (up to 2–5 minutes)

• On mobile devices, especially with videos >10 minutes or background apps running, the final 1% may take longer due to CPU throttling or memory constraints.
• Do not close the app or switch to another app during this phase—doing so may cancel the process.

Step 2: Check internet connection

• CapCut Mobile uses cloud-based speech recognition (even for offline-looking projects). A weak or intermittent connection can stall the final sync.
• Ensure you're on stable Wi-Fi or cellular data.

Step 3: Restart the app

• If stuck for more than 5 minutes, force-close CapCut and reopen the project.
• In many cases, the subtitles will appear as "completed" upon reopening because the backend job finished silently.

Step 4: Split the video into shorter clips

• Videos longer than 15 minutes often trigger timeouts or memory limits on mobile.
• Before recognition, split your clip into segments ≤10 minutes using the "Split" tool.

Step 5: Avoid music-heavy or noisy audio

• Background music, overlapping voices, or low-quality audio can confuse the ASR (Automatic Speech Recognition) engine, causing hangs during post-processing.
• Use the "Lyrics Recognition" feature if your content is primarily singing.

📍 Final Note:

If the issue persists across platforms with the same file, the problem likely lies in the audio content itself (e.g., silence gaps, non-speech sounds, unsupported language). Try re-recording or re-encoding the audio in a standard format (AAC, 44.1kHz, stereo).

Thank you for using CapCut!