April 2025, signalapp/Signal-Android: Consolidated reliability improvements for long-form video delivery by hardening MP4 muxer duration handling and ensuring accurate durations for large timescales. This release focused on preventing 32-bit duration overflows in MP4 metadata for H.264/H.265 streams, reducing playback and metadata issues across customers delivering long or high-resolution content.

March 2025 (2025-03) — Key accomplishments focused on stabilizing the Android media pipeline in signalapp/Signal-Android by fixing an audio muxer issue. Key features delivered: - Bug fix: Skip zero-sized samples in the Android MP4 multiplexer to prevent duration drift in the audio track. Major bugs fixed: - Eliminated zero-sized samples from contributing to the audio track (commit referenced). Overall impact and accomplishments: - Increased audio reliability across devices, reduced risk of desync, and improved user experience. Verified on Samsung Galaxy A54 with Android 14. Technologies/skills demonstrated: - Android development, media muxer pipeline, input validation, device testing.

February 2025: Key feature delivered to improve Android MP4 transcoding processing by upgrading the mp4san library to v0.5.3, enabling seamless handling of transcoded MP4 files and MDAT aggregation to a single cumulative MDAT box for format correction. This work enhances media compatibility on Android and stabilizes transcoding workflows, contributing to higher user satisfaction and lower post-processing error rates.