Three end-to-end checks that the transcoder actually produces playable
output, not just plausible argv. Skip cleanly on hosts without ffmpeg
on PATH so unit-test CI keeps working.
- TestTranscoder_DirectPlayProducesH264 — synth h264+aac MP4 via
`ffmpeg -f lavfi testsrc/sine`, run Analyze (expect direct play),
Stream to disk, ffprobe the result, assert codecs are still h264+aac.
- TestTranscoder_TranscodeHEVCToH264 — synth hevc+ac3 MKV, expect
transcode decision, Stream to memory, ffprobe-verify the output is
h264+aac. Skipped if libx265 isn't compiled in.
- TestTranscoder_AnalyzeReportsRealMediaInfo — sanity check that
Analyze returns a usable mediainfo (320x240, ~2s duration) the API
handler can show to the player.
Verified locally:
PASS: TestTranscoder_DirectPlayProducesH264 (0.09s)
PASS: TestTranscoder_TranscodeHEVCToH264 (0.22s)
PASS: TestTranscoder_AnalyzeReportsRealMediaInfo (0.06s)
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