Software⏱️ 4 min read📅 2026-06-19

How to Fix: FFmpeg error "Tag gpmd incompatible with output codec id '0'" when concatenating trimmed GoPro videos: how to fix it?

FFmpeg error when concatenating trimmed GoPro videos, solution to fix gpmd incompatible with output codec id '0'

Quick Answer: Use the -tag option without specifying a value, and instead use the -c:v and -c:a options to specify the codecs for video and audio respectively.

The error 'Tag gpmd incompatible with output codec id ''0''' occurs when FFmpeg is unable to concatenate two videos using the gpmd tag, which is used for telemetry information. This issue affects users who want to remove telemetry data from their video files without losing any video quality.

This error can be frustrating as it prevents users from being able to fully utilize their video files. However, there are several methods to fix this issue and achieve the desired results.

🛑 Root Causes of the Error

  • The primary reason for this error is that the gpmd tag is not compatible with all output codecs. When FFmpeg tries to remove telemetry data from a video file using the gpmd tag, it may not be able to determine the correct codec parameters for the output file. This can lead to an 'invalid data found' error.
  • Another possible reason for this error is that the input video files have different codec parameters than the output file. For example, if the input video has a different codec than mp4, FFmpeg may not be able to determine the correct codec parameters for the output file.

🚀 How to Resolve This Issue

Fixing gpmd Tag Compatibility

  1. Step 1: To fix this issue, you need to remove the gpmd tag from the input video files before concatenating them. This can be done by using the '-map' option with FFmpeg and specifying 'gpmd' as the output codec instead of leaving it empty.
  2. Step 2: Alternatively, you can use the '-tag:v:0' option to specify a different tag for the video stream, which will remove the gpmd tag from the input video files. This method may not work if the input video files have already been processed with the gpmd tag.
  3. Step 3: Once you have removed the gpmd tag from both input video files, you can concatenate them using the same FFmpeg command as before.

Removing Telemetry Data from Video Files

  1. Step 1: Another approach to fix this issue is to remove telemetry data from both input video files before concatenating them. This can be done by using a separate FFmpeg command to remove the gpmd tag from each input video file.
  2. Step 2: You can use the '-tag:v:0' option with FFmpeg to specify that you want to remove the gpmd tag from the video stream. You may need to use the '-i' option with this command to specify the input video file.

✨ Wrapping Up

To fix the 'Tag gpmd incompatible with output codec id ''0''' error when concatenating trimmed GoPro videos, you can try removing the gpmd tag from both input video files before concatenating them. Alternatively, you can use a separate FFmpeg command to remove telemetry data from each input video file. By following these methods, you should be able to achieve your desired results without losing any video quality.

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