Is it possible? Cause right now hardware recording support only 4k, and software recording gives me horrible file: https://youtu.be/D2XihwBZB3U while game runs okay.
Question / Help Recording 8K via HEVC
- Thread starter vorob
- Start date
In my other thread, i'm asking how to add 265 to OBS: https://obsproject.com/forum/threads/how-to-add-h265-hevc.77033/
It is possible cause I see 265 available in obs of other people, but not in my version :(
I need to add 265 and try recording 8K :)
It is possible cause I see 265 available in obs of other people, but not in my version :(
I need to add 265 and try recording 8K :)
Boildown
Active Member
If you had the processing power, you could do it. The main reason to do it is precisely because you can't do it with AVC (H.264), as 8K exceeds AVC's 4096x4096 limitation. You gotta record 8K somehow, and its not gunna be with H.264. You'd want to use the ultra-fastest preset available, I'd assume, to not overload the encoder.
Whether it works with OBS, I don't know, never tried it and its not on my to-do list.
Edit: I was curious and found that AVC has added support for resolutions up to 8192x4320 at Level 6 (which I didn't even know was a thing) as of a year ago: http://www.itu.int/ITU-T/recommendations/rec.aspx?rec=12904 , but I've seen nothing to indicate any of the particular encoders have implemented this. Still, if I were you I'd try it and see what happens before messing with HEVC.
Whether it works with OBS, I don't know, never tried it and its not on my to-do list.
Edit: I was curious and found that AVC has added support for resolutions up to 8192x4320 at Level 6 (which I didn't even know was a thing) as of a year ago: http://www.itu.int/ITU-T/recommendations/rec.aspx?rec=12904 , but I've seen nothing to indicate any of the particular encoders have implemented this. Still, if I were you I'd try it and see what happens before messing with HEVC.
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This can be done only in recording, Custom Output (FFmpeg), using mp4 conainer, video encoder: NVENC_HEVC or libx265 if possible.
Warning: unclean stop of mp4 recordings (BSOD, crash, or out of storage space) will cause mp4 file to be completely unreadable, unless a custom muxer setting is used, frag_duration=15000000
A CPU-only libx265 could be an option... only if FFmpeg was compiled with x265 support. There is an option to replace OBS-Studio's avcodec-57.dll with the one that have libx265.
https://trac.ffmpeg.org/wiki/Encode/H.265
Which NVidia support h265 and 8k? Find code name from your GPU...
https://en.wikipedia.org/wiki/List_of_Nvidia_graphics_processing_units
Use NVENC matrix table at the far right.
https://developer.nvidia.com/video-encode-decode-gpu-support-matrix
Possible problems:
1. Texture size support of 8192x8192 is required for any 8k recordings in OBS-Studio.
2. OBS-Studio might have accuracy problem with NV12, i420, i444 for super high 8k resolutions resulting in color shift or pixelation. RGB might work better, found in Advanced, color format. EDIT: i444 in OBS-Studio 20.1.1 requires 3 times texture height, but 7680x4320 i444 may exceed 8192x8192 texture size which may make i444 unusable.
Warning: unclean stop of mp4 recordings (BSOD, crash, or out of storage space) will cause mp4 file to be completely unreadable, unless a custom muxer setting is used, frag_duration=15000000
A CPU-only libx265 could be an option... only if FFmpeg was compiled with x265 support. There is an option to replace OBS-Studio's avcodec-57.dll with the one that have libx265.
https://trac.ffmpeg.org/wiki/Encode/H.265
Which NVidia support h265 and 8k? Find code name from your GPU...
https://en.wikipedia.org/wiki/List_of_Nvidia_graphics_processing_units
Use NVENC matrix table at the far right.
https://developer.nvidia.com/video-encode-decode-gpu-support-matrix
Possible problems:
1. Texture size support of 8192x8192 is required for any 8k recordings in OBS-Studio.
2. OBS-Studio might have accuracy problem with NV12, i420, i444 for super high 8k resolutions resulting in color shift or pixelation. RGB might work better, found in Advanced, color format. EDIT: i444 in OBS-Studio 20.1.1 requires 3 times texture height, but 7680x4320 i444 may exceed 8192x8192 texture size which may make i444 unusable.
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I managed to fine HEVC. I was just blind :)
But it crashes when i stop recording:
Unhandled exception: c0000005
Date/Time: 2017-11-14, 15:45:43
Fault address: 7FFFB8F74A10 (c:\program files (user)\obs-studio\bin\64bit\avutil-55.dll)
libobs version: 20.1.1
Windows version: 10.0 build 16299 (revision: 19; 64-bit)
CPU: Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz
But it crashes when i stop recording:
Unhandled exception: c0000005
Date/Time: 2017-11-14, 15:45:43
Fault address: 7FFFB8F74A10 (c:\program files (user)\obs-studio\bin\64bit\avutil-55.dll)
libobs version: 20.1.1
Windows version: 10.0 build 16299 (revision: 19; 64-bit)
CPU: Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz
Its working. Its not even overloading my system. But framerate is weird: https://youtu.be/4YVtpLBjXXA
Tried in other game, where gpu wasn't 100% used and even there i had same jerky fps.
Tried in other game, where gpu wasn't 100% used and even there i had same jerky fps.
Show us OBS logs that have your recordings? It might show dropped frames results.
On the video, top left, it only shows about 20 fps. Your graphics card might be overloaded.
Here is a video from another game, Thief II, https://youtu.be/E82XmqkpJyI over 50 FPS and same laggy recording. That's from its log:
Code:
18:02:13.782: ------------------------------------------------
18:02:54.466: Starting recording due to hotkey
18:02:55.953: warning: Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
18:02:55.953: warning: Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
18:02:55.960: ==== Recording Start ===============================================
18:03:38.246: Stopping recording due to hotkey
18:03:38.323: Output 'adv_ffmpeg_output': stopping
18:03:38.323: Output 'adv_ffmpeg_output': Total frames output: 1175
18:03:38.323: Output 'adv_ffmpeg_output': Total drawn frames: 1315
18:03:38.323: ==== Recording Stop ================================================
18:03:38.535: warning: 2 frames left in the queue on closing
18:03:52.583: ==== Shutting down ==================================================
18:03:52.593: Switched to scene '(null)'
18:03:52.907: All scene data cleared
18:03:52.907: ------------------------------------------------Tried 4K via HEVC and it worked fine.
Framerate is okay and OBS worked fine.
Tried 5K via HEVC and it worked almost fine
Framerate is okay: https://www.youtube.com/watch?v=ECAh3zIHpSw
But OBS crashed on recording stop.
Framerate is okay and OBS worked fine.
Tried 5K via HEVC and it worked almost fine
Framerate is okay: https://www.youtube.com/watch?v=ECAh3zIHpSw
But OBS crashed on recording stop.
Checked in game. Works fine: https://youtu.be/6K-Cw4Oqcc0
OBS didn't crash on recording stop.
Tried 10fps and encoding overloaded... OBS crash + dropped frames...
OBS didn't crash on recording stop.
Tried 10fps and encoding overloaded... OBS crash + dropped frames...
Maybe i need to set something here, to lower load...
https://pp.userapi.com/c837325/v837325724/65df6/KYEeXLlcFfM.jpg
https://pp.userapi.com/c837325/v837325724/65df6/KYEeXLlcFfM.jpg
Video encoder settings, Try preset=fast ...and check if that allows you to go 10 fps and 30 fps.
Looked at source code... https://github.com/FFmpeg/FFmpeg/blob/master/libavcodec/nvenc_hevc.c
Thx! That worked: https://youtu.be/7hDZv0UQ-y0
I managed to play with 20fps recording with no errors. But 25 fps overloads encoder. And advice?)
I managed to play with 20fps recording with no errors. But 25 fps overloads encoder. And advice?)