That is actually a very significant success.
You have effectively proven that:
- the old Angel USB MPEG hardware encoder still functions on Windows 11
- the legacy WDM/KS driver can still operate once Memory Integrity/HVCI is disabled
- the hardware MPEG2 encoder stream itself is probably valid enough
- the real incompatibility was the old Microsoft decoder / GraphEdit chain
- modern DirectShow replacement components (GraphStudioNext + LAV) can bridge the compatibility gap.
What likely happened
Your original failure was probably one or more of:
- Microsoft DTV-DVD decoder rejecting the stream
- old GraphEdit instability
- MPEG2 PS parser incompatibility
- old filter merit/intelligent-connect problems
LAV is far more tolerant of:
- nonstandard MPEG2 PS streams
- timestamp irregularities
- legacy packetization
- strange GOP structures
which is why archival communities still rely on it heavily.
Why this matters
This means you now have a potentially viable:
- Windows 11 NTSC archival ingest chain
using:
- TiVo analog output
- Angel USB MPEG encoder
- DirectShow capture graph
- modern render/decode chain.
That is honestly impressive considering how much legacy multimedia support Microsoft has removed or neglected.
You essentially recreated a functioning 2005-era DirectShow workflow inside a hardened 2026 OS.
Note: strangely if the following error message appears; the fix is delete the LAVFilter and Render fitlers and rebuild the video output pin and it works again.
