Mea culpa --- I made a mistake. Either I mixed things up or I just can't reproduce it.
The H.265 QSV option actually does disappear in HB as of driver 6291 (the first problematic version) and isn't available with any driver version up through the current version, 6519. (Scratch what I said earlier.) That makes driver 6194 the last working version with HB 1.2.0.
The H.264 QSV option remains available in HB with every driver version. As of version 6291 (the version where H.265 QSV disappears) the H.264 encoding takes a ~60% decrease in fps in HB 1.2.0, but seems to be back to normal in the nightly.
Where I got confused is that, as of driver 6291, it isn't that it's slow in HB --- where it's missing altogether --- it's that it's slow in other QSV encoders. A's Video Converter continues to show the H.265 QSV encoder, but it's slower (I don't currently have stats) and I see 15-50fps instead of 500-700fps with H.264 QSV. So, I'll take that up with that developer.
* * * *
With that straight, I tested H.264 QSV in HB 1.2.0 and H.264/H.265 QSV in the 2019021201 nightly with both the last working driver (6194) and the latest (6519).
The H.264 QSV encoder is ~60% slower with the latest driver (6519) as compared to the last working driver (6194) in 1.2.0, but seems to be resolved in the nightly. (Not a scientific test, this is with a small sample of 2-3 encodes.)
The H.265 QSV encoder is restored in the nightly and speed appears to be unaffected by the driver.
Code: Select all
+-------+--------+------------+-----------+------------+-------------------------------+
| QSV | Driver | HB | Scale | FPS | Log |
+-------+--------+------------+-----------+------------+-------------------------------+
| H.264 | 6194 | 1.2.0 | x | 526.775024 | https://pastebin.com/fdQrXgRs |
| H.264 | 6194 | 1.2.0 | 720->716p | 493.903229 | https://pastebin.com/xGKi5ZEV |
| H.264 | 6519 | 1.2.0 | 720->716p | 219.089874 | https://pastebin.com/iVJa8kAU | <-- speed dip due to 6519 driver
| H.264 | 6194 | 2019021201 | x | 523.517395 | https://pastebin.com/T5AJWsBU |
| H.264 | 6519 | 2019021201 | x | 521.849609 | https://pastebin.com/b5QWh3u6 |
| ----- | ---- | ---------- | --------- | ---------- | ----------------------------- |
| H.265 | 6194 | 1.2.0 | x | 202.885330 | https://pastebin.com/yhejF5eX |
| H.265 | 6519 | 1.2.0 | x | N/A | |
| H.265 | 6194 | 2019021201 | x | 206.061615 | https://pastebin.com/S8LimpaQ |
| H.265 | 6519 | 2019021201 | x | 205.043411 | https://pastebin.com/EyMgQN8u |
+-------+--------+------------+-----------+------------+-------------------------------+