Single-lens X4/X5 .insp export: MediaSDK produces no output (reproducible across multiple configurations)

[bcaldwell85]

We are integrating Desktop-MediaSDK-Cpp in a backend processing worker and are consistently unable to export single-lens .insp photos from an X4/X5 using the MediaSDK. The same files export correctly (non-fisheye JPEG) via Insta360 Studio GUI.

Summary

• Dual-lens .insp exports work correctly via MediaSDK.

• Single-lens .insp consistently produces no output file.

• The failure reproduces across multiple configuration combinations (including minimal flags).

• The process does not throw an SDK-level error — it simply does not create the expected output.

Environment

SDK: 3.1.1-20250922

OS: Ubuntu 22.04

Runtime: CUDA 12.1.1 container

Camera: Insta360 X4/X5

Input type: Single-lens .insp

Reproduction Matrix

For .insp inputs, we attempt MediaSDK export using the following sequence:

1. Full configuration
   -stitch_type (aistitch | optflow | dynamicstitch | template)
   -export_jpeg360

Result: No JPEG output created.

2. Same configuration without CUDA

Identical to #1, but with -enable_cuda removed.

Result: No JPEG output created.

3. Minimal stitch configuration
   -stitch_type optflow
   -export_jpeg360

Result: No JPEG output created.

4. No explicit stitch type
   -export_jpeg360

Omitting -stitch_type entirely (SDK default behavior).

Result: No JPEG output created.

Sample Logs

2026-02-28 02:10:10,926 ERROR 34 common.drainer - Job failed job_id=3fbe54a1-ad78-4ada-b905-b317c0255fea: Expected output not created: /tmp/insta360/tmp8o52_pk8/out/IMG_20260224_145418_00_016_native.jpg
Traceback (most recent call last):
File "/app/common/drainer.py", line 382, in _process_message
result = self.process_job(job)
File "/app/insta360_worker/tasks.py", line 109, in process_job
produced = run_mediasdk(local_in, out_dir, kind)
File "/app/app/main.py", line 644, in run_mediasdk
raise RuntimeError(f"Expected output not created: {out_file}")

2026-03-02 00:21:04,478 WARNING 34 insta360.worker - MediaSDK INSP attempt 1 returned success but did not produce expected output
2026-03-02 00:21:04,526 WARNING 34 insta360.worker - MediaSDK INSP attempt 2 returned success but did not produce expected output
2026-03-02 00:21:04,573 WARNING 34 insta360.worker - MediaSDK INSP attempt 3 returned success but did not produce expected output
2026-03-02 00:21:04,619 WARNING 34 insta360.worker - MediaSDK INSP attempt 4 returned success but did not produce expected output

The retrieved output is a corrupt jpg

Fallback Behavior

If all MediaSDK attempts fail to produce output, we fall back to a Python-based dewarp pipeline:

• Open .insp via Pillow

• Apply fisheye → rectilinear remap using OpenCV

• fisheye_fov

• output_fov

• calibrated remap matrix

• Save {image}_native.jpg with configured jpeg_quality

This fallback path works reliably, but it is not equivalent to Studio output and bypasses MediaSDK entirely.

[Greg7000]

We are facing the same, unable to produce .jpg for single-lens .insp X4 but works perfectly fine with dual-lens X3