Enhanced playback compatibility: Mp4Writer-generated videos now compatible with all media players #483

All 148 tests pass, 47 skipped in 9m 23s

    1 files ±0     1 suites ±0 9m 23s ⏱️ ±0s
195 tests ±0 148 ✔️ ±0 47 💤 ±0 0 ❌ ±0
148 runs ±0 101 ✔️ ±0 47 💤 ±0 0 ❌ ±0

Results for commit ced2df1. ± Comparison against earlier commit 1d57d4d.