If the target MP4 file itself contains broken frames or missing headers, no amount of SSIS configuration will fix the execution loop.
Check the source site to see if the downloaded file matches the expected file size. A 2GB movie that stops downloading at 400MB will consistently trigger playback failures.
A user on Microsoft's Q&A forum said, "The most effective first fix for recovered MP4s that will not play is to rebuild their missing header using an open source tool called untrunc". The guide they provided is essentially this one. ssis951mp4 fix
Method 1: Fix the MP4 Header Using Untrunc (Advanced Repair)
Steps:
If you are encountering a failure during execution (often represented by a red "X" in the designer), follow these steps to identify and resolve the root cause: Check the Execution Results Tab
: Interestingly, the "SSIS 951" identifier is also sometimes associated with 1/6 scale action figure heads (like the SUPER DUCK SDH049 ) designed to match the actress's likeness. If the target MP4 file itself contains broken
By following the steps in this guide, you have a very good chance of getting your corrupted video file back. Best of luck