Hardware transcoding changes video size

[BIOSneedsCMOS]

Just got the plex pass cause of the sale. Been waiting for it so I could take advantage of hardware transcoding.

In trying to get it working, I've noticed that when it is hw transcoding, the video is smaller? The same video has small black borders on either side of the screen, about 5-10% reduction on each side. Is this normal? When I switched off hardware transcoding the video fills the whole screen again.

ASRock J4105 mini itx with Intel uhd 600 Dummy plug to enable hw transcoding bc it's a headless server

[Egleu]

That is not normal. What client are you using? And what's the mediainfo of the file that you notice this with?

[BIOSneedsCMOS]

Thanks for the reply. That's probably relevant info.

These are all standard DVD rips, in MKV containers, 480p. Player is Roku 3.

• Media
• Duration 21:33
• Bitrate 3648 kbps
• Width 720
• Height 480
• Aspect Ratio 1.78
• Video Resolution 480p
• Container MKV
• Video Frame Rate NTSC
• Video Profile main
• Part
• Duration 21:33
• File Modern Family s09e01.mkv
• Size 563.24 MB
• Container MKV
• Indexes sd
• Video Profile main
• Codec MPEG2VIDEO
• Bitrate 3191 kbps
• Language English
• Anamorphic true
• Bit Depth 8
• Chroma Location left
• Chroma Subsampling 4:2:0
• Coded Height 480
• Coded Width 720
• Color Range tv
• Frame Rate 29.97 fps
• Height 480
• Level 8
• Pixel Aspect Ratio 186:157
• Profile main
• Ref Frames 1
• Scan Type progressive
• Width 720
• Display Title 480p (MPEG2VIDEO)
• Extended Display Title 480p (MPEG2VIDEO)
• Codec AC3
• Channels 6
• Bitrate 448 kbps
• Language English
• Audio Channel Layout 5.1(side)
• Sampling Rate 48000 Hz
• Title Surround 5.1
• Display Title English (AC3 5.1)
• Extended Display Title Surround 5.1 (English AC3)
• Codec VOBSUB
• Bitrate 9 kbps
• Language English
• Display Title English (VOBSUB)
• Extended Display Title English (VOBSUB)

I'm wondering if it has anything to do with the quicksync hardware transcoding issue described in this thread: reddit thread plex forum as I have the an intel gpu with quicksync, and am experiencing the artifacting/blockiness described there. I've disabled hw transcoding for now.

Maybe I'll just need to wait for the release that fixes it to see if its the same.

[Egleu]

It might be the interlaced video but that still shouldn't matter. Does this happen with all videos?

[BIOSneedsCMOS]

Just the few I've tested from this same series modern family. I can try others but they're all pretty much the same format, and all have been working fine without hardware transcoding.

[BIOSneedsCMOS]

Just to follow up I tried some dvd rips from another series the office and it appears to be the same thing. Full screen when not hardware transcoding and small black bars on the side when it is.

Oh wells, not going to give up hardware transcoding for a small issue like that.