This case is anonymized and describes a specific engineering situation. It is not a guarantee that another app will have the same cause, effort, or outcome.
Context
The workflow compressed and merged video segments. The migration preserved functional output, but the default or inherited encoding path produced files too large for the product requirement.
Investigation
The export path was inspected for branches that bypassed normalization, especially the single-input path. Frame rate, resolution, bitrate, codec behavior, and composition settings were evaluated together rather than changing one value blindly.
Root cause
A single normalized input could avoid the intended compression path, and encoding parameters were not constrained tightly enough for the target balance of quality, size, and speed.
Resolution
The compose path was updated so a single input still passed through the required transformation, with explicit output constraints selected for the app’s practical quality target.
Validation
In the reported test, the one-minute output decreased from about 70.5 MB to about 15.6 MB. Export time was roughly 17 seconds for that minute of video, leaving a separate speed tradeoff to optimize.
Engineering takeaway
The outcome was a materially smaller file without reverting the migration. The remaining optimization question became speed versus compression—not whether the export path worked.
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