[Android] Video.compress rejects with an empty message on MediaCodec.CodecException #428

Current behavior

On Android, when MediaCodec throws a CodecException during Video.compress, the promise rejects with the exception's message, which is usually empty. The JS side gets CodecException: or start failed and nothing else, so one codec error can't be told from another.

We saw this in production on Samsung Exynos phones before #424: every failure arrived empty, and the actual cause (NO_MEMORY in STARTING) only showed up in logcat on a test device.

Expected behavior

The rejection names the codec error. CodecException.getDiagnosticInfo() already carries it, e.g. android.media.MediaCodec.error_neg_12 for NO_MEMORY.

Platform

• Android
• iOS

React Native Version

0.86

React Native Compressor Version

2.0.4

Reproducible Steps And Demo

Any input that makes the encoder or decoder throw a CodecException. For example, 1080p manual compression on an Exynos device before #424. The rejection's message is empty.