The primary reason for this error is that some media files lack timestamp information. This can happen when the original files were not properly timestamped or if the timestamps were lost during processing.Another possible cause could be due to incorrect usage of FFmpeg's concat command or issues wi

How do I fix: Setting Correct Timestamps Manually?

Step 1: Alternatively, you can manually set the timestamps for each file using FFmpeg's `setpts` filter. This requires more effort but ensures accurate timestamped outputs.Step 2: Use the following command to set timestamps: `ffmpeg -i input1.ts -vf 'setpts=0.01*PTS' -c:v copy output1.mkv`, repeat t

Software⏱️ 3 min read📅 2026-06-11

How to Fix: How to deal with an FFmpeg meets unknown timestamps error?

Q: Best Solutions to Fix It Suppressing Error and Merging Files without Re-encoding?

Step 1: To suppress this error, you can use the `-notimestamp` flag when merging files using FFmpeg's concat command. This will allow FFmpeg to ignore any missing timestamps.Step 2: Add the `-notimestamp` flag to your command line as follows: `ffmpeg -y -f concat -i filelist.txt -c copy output.mkv -

FFmpeg concat error handling and timestamp management.

Quick Answer: Use the -nokey option to suppress keyframe insertion, or use the -setpts option to set timestamps for each file.

📋 Table of Contents

⚠️ Common Causes
✅ Best Solutions to Fix It
✨ Wrapping Up

The error 'Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly' occurs when FFmpeg encounters a media file without timestamp information.

This error can be frustrating as it prevents the successful merging of multiple files using FFmpeg's concat command. However, there are ways to suppress this error and merge the files without re-encoding.

⚠️ Common Causes

The primary reason for this error is that some media files lack timestamp information. This can happen when the original files were not properly timestamped or if the timestamps were lost during processing.
Another possible cause could be due to incorrect usage of FFmpeg's concat command or issues with file paths.

✅ Best Solutions to Fix It

Suppressing Error and Merging Files without Re-encoding

Step 1: To suppress this error, you can use the `-notimestamp` flag when merging files using FFmpeg's concat command. This will allow FFmpeg to ignore any missing timestamps.
Step 2: Add the `-notimestamp` flag to your command line as follows: `ffmpeg -y -f concat -i filelist.txt -c copy output.mkv -notimestamp`
Step 3: Note that this method may result in slightly different timestamped outputs due to the lack of accurate timestamp information.

Setting Correct Timestamps Manually

Step 1: Alternatively, you can manually set the timestamps for each file using FFmpeg's `setpts` filter. This requires more effort but ensures accurate timestamped outputs.
Step 2: Use the following command to set timestamps: `ffmpeg -i input1.ts -vf 'setpts=0.01*PTS' -c:v copy output1.mkv`, repeat this process for each file.

✨ Wrapping Up

By using either of these methods, you can successfully merge multiple files without encountering the 'Timestamps are unset in a packet for stream 0.' error.

Did this fix your problem?

If not, try searching for specific error codes.

🔍 Search Error Database

❓ Frequently Asked Questions

🛠️ Related Fixes

How to Fix: Pc crashes shortly after launching game (rainbow

Fix Pc crashes shortly after launching game (rainbow six siege). Compl

How to Fix: Installing an APK on a locked down phone

Installing an APK on a locked down phone: Try using a rooted device, e

How to Fix: New PC build- no signal and no clue

Fix New PC build- no signal and no clue. Complete troubleshooting guid