AWS Lambda permission denied when trying to use ffmpeg

AWS Lambda runs on Amazon Linux. It is a known issue. Try building (with static enabled) and check if it works on Amazon Linux and upload that binary. You do not have the privileges to chmod the files in /var/task/. Or try this solution that works:

• Move ffmpeg to /tmp
• chmod 755 /tmp/ffmpeg
• Call /tmp/ffmpeg

See this discussion for more info.