HEVC Conversion results in wrong resolution

[ErikRedbeard 0]

I've been looking into converting some of my content to HEVC and AAC with the idea of eventually applying it to an entire library.
But I'm having issues with the Original Quality setting defaulting certain videos to 720p while their source is 1080p. And I can see the drop in quality due to it while playing the video.

The source is an anime which generally means less color gradients per frame thus lower bitrates and I have a feeling this directly affects the resolution it's thinking the output should be.
Running a "conversion" for H264 however works fine and keeps the original resolution.

See screenshot for file details and settings used next to it.

Edited March 10, 2021 by ErikRedbeard

[Luke 42085]

Hi there, can you please attach the ffmpeg conversion log? thanks.

[ErikRedbeard 0]

Here's the conversion log for the HEVC one that results in the wrong resolution.

ffmpeg-transcode-86d4ca3a-37a1-454e-9f7a-6cfce1baa5e9_1.txt

Edited March 10, 2021 by ErikRedbeard

[Luke 42085]

OK, this should be improved for the next release of the server, thanks.

[hugo.lapointe 3]

Hi! I think a have the same problem, but just want to check with you it's not a configuration problem on my part.

I'm currently transcoding all my media file to HEVC (H265) with Tdarr, and all my movie are being retranscoded in emby to lower resolution.

See example (1080p HEVC 2.8 Mbps => 720p H264 1.4 Mbps)

ffmpeg-transcode-8911d4d6-55a4-4bfe-84f1-0dfc4ed4e308_1.txt

[Luke 42085]

1 hour ago, hugo.lapointe said:

Hi! I think a have the same problem, but just want to check with you it's not a configuration problem on my part.

I'm currently transcoding all my media file to HEVC (H265) with Tdarr, and all my movie are being retranscoded in emby to lower resolution.

See example (1080p HEVC 2.8 Mbps => 720p H264 1.4 Mbps)

ffmpeg-transcode-8911d4d6-55a4-4bfe-84f1-0dfc4ed4e308_1.txt 4.37 MB · 0 downloads

Hi, this looks normal based on the quality setting chosen in the app. Try raising it a little bit higher.

[hugo.lapointe 3]

Wow! Thanks for your quick answer. Just to confirm. What are the quality setting you're refering to? The client? Here are my current settings :

Transcoding Emby Serveur :

 

And on my client (Web Chrome), I choose auto, and the preset 720p - 1.5Mbps is automatically chosen.

 

Can you help me?

[Luke 42085]

HI, yes the client settings. Try choosing a specific value if you find that Auto is too conservative for your setup.