@Jaka-Mele

Two posts and we don't know which program and version that you're using. Please tell us.

John CB

Hey.

Thanks for the answer.

I am using Magix Movie Edit Pro Premium 2021 the latest version (no updates available).

I have Ryzen 1800, 64GB of ram, 1 TB nvme drive, Geforce gtx 1080Ti... using Windows 10 pro latest build. I am IT professional, so trust me, my computer is ok.

Here is the screenshot of HEVC settings.

And here is the video that gets corrupted:

here is the video in question - I uploaded it on the youtube, but can provide link to raw file:

I tried with the above settings, and with the default hevc settings - in both cases I get corrupted video.

Ideas?

@Jaka-Mele

Actually I have a few ideas.

Lets start with the screen recording program used and the settings.

You need to avoid creating any files using a variable frame rate and make sure the average bit rate of the recording is not set too low. Make sure the files do not have an open GOP structure. Both can cause further re-encoding to falter in quality and may also end up with audio sync problems if such files are further edited. If the files are HEVC encoded it may be better to switch to MP4 which will be less stressful on your system as it lacks an Intel GPU as requested on the minimum specs page for running the current version of Movie edit Pro.

The settings you have chosen would normally work reasonably well for most camcorder footage that has a stable GOP structure and a constant frame rate and reasonable Mb/s per frame. However screen recordings can be problematic.

One solution you could try using a similar preset for your video but using the higher resolution setting instead and changing the resolution back down to 1080p for the export.This may help the program give the lower quality parts of the recording enough lack of compression to retain detail.

The above settings (Except frame rate which should be set to the same frame rate as the recordings) may help but first I would look at the recorded data from your recorded files to find out the needed information on the codec used producing the files and subsequent data using MediaInfo. If you have no idea on how to interpret the data you can post the results back to this topic thread for one of us to look at for possible problems.

Ray.

Hey. Thanks for answer @CubeAce.

The source video is recorded with OBstudio, using default settings and 1920x1080 resolution.

Here is what mediainfo tells me about it:

Not sure about the resolution - as both source and export used the same 1080p. I recorded with 60fps... and when exporting to HEVC I first left that at 60 fps, then in second try I lowered it to 30... Same result - garbage video in the later part.

I am not sure about intel processor - as Ryzen is fully compatible ... But anyhow - isn't exporting video supposed to work on all configurations, with only the speed being a difference whether I have best/supported hw or not? Also, I have gtx 1080ti card, which does not seem to help with the final rendering/exporting of video. This 5 min clip took over 20 mins to render using the BEST setting, and I had hw encoding ticked.

I will try your settings, but wondered if you can comment on source video metadata (or suggest better OSB settings)...

thanks!

Using the MEP, I noticed that sometimes source clips would behave chaotically ... Clips and video segments that I already edited and put and made transitions between them, would shift a little (and be a second off), and I had to correct that again later. Is that the result of me using not optimal source video files? What would be better? Anyone using OBStudio? What are best recording settings if one is working with video editor on them later?

Here are my settings:

EDIT. I have now changed to MP4 CBR 12000 Kbps, will see how it goes now.

Thanks.

@Jaka-Mele

Hi. While I can't find any problems with the MediaInfo file data on your OBS recordings I have found personally the files can cause problems within MEP and has taken me time to get them working for my system.

The resulting file data does look on the whole to be using less MB/s than yours and yet they seem to work.

Here is my MediaInfo data from my OBS recordings.

General
Complete name                            : F:\Internet Video Recordings\2021-04-07 11-32-54.mp4
Format                                   : MPEG-4
Format profile                           : Base Media
Codec ID                                 : isom (isom/iso2/avc1/mp41)
File size                                : 91.9 MiB
Duration                                 : 1 min 12 s
Overall bit rate                         : 10.6 Mb/s
Writing application                      : Lavf58.29.100

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L4.2
Format settings                          : CABAC / 4 Ref Frames
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 4 frames
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 1 min 11 s
Bit rate                                 : 10.3 Mb/s
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 50.000 FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.099
Stream size                              : 89.0 MiB (97%)
Writing library                          : x264 core 161 r3020 d198931
Encoding settings                        : cabac=1 / ref=1 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=2 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=0 / threads=24 / lookahead_threads=8 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=1 / keyint=50 / keyint_min=5 / scenecut=40 / intra_refresh=0 / rc_lookahead=10 / rc=abr / mbtree=1 / bitrate=10250 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Color range                              : Full
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709
Codec configuration box                  : avcC

Audio
ID                                       : 2
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : mp4a-40-2
Duration                                 : 1 min 12 s
Bit rate mode                            : Constant
Bit rate                                 : 321 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 46.875 FPS (1024 SPF)
Compression mode                         : Lossy
Stream size                              : 2.78 MiB (3%)
Default                                  : Yes
Alternate group                          : 1

These are my settings for OBS studio. They seem to work OK for me. You can try them out to see if the changes make a difference. Use your own preferred frame rate.

Ray.

@Jaka-Mele

Hi

From the MediaInfo data, the OBS recording is:

Overall bitrate: 721 kb/s, 1920 x 1080, 60 fps, AVC encoded.

The most likely cause of the softness exhibited later in the video is the overall bitrate is very low. I would expect a value of nearer 2000 kb/s (2 Mb/s), or higher, for a recording with very little action in it, and up to 12000 kb/s (12 Mb/s ) where there is a lot of fast action.

@CubeAce has given you better settings to use in OBS and I would also suggest you use the MP4 container file not the MKV and has you can see from his MediaInfo data the overall bitrate is 10.6 Mb/s

John EB
Forum Moderator

@Jaka-Mele

To answer your earlier question.

I am not sure about intel processor - as Ryzen is fully compatible ... But anyhow - isn't exporting video supposed to work on all configurations, with only the speed being a difference whether I have best/supported hw or not? Also, I have gtx 1080ti card, which does not seem to help with the final rendering/exporting of video. This 5 min clip took over 20 mins to render using the BEST setting, and I had hw encoding ticked.

You are partially correct as having an Intel GPU as well can also help with smoother playback a bit but possibly not as much as the graphics card would.

With the video you showed at the resolutions and export settings you are using, an Intel GPU along with the use of your graphics card would have sped the export up by about four times or slightly faster. Only using straight cuts and no effects it could be much faster.

Ray.

@Jaka-Mele

Hi

. . . .  Ryzen 1800, 64GB of ram, 1 TB nvme drive, Geforce gtx 1080Ti. . . . .

From a performance point of view the above spec is OK to run MEP, however you are missing out on Hardware Acceleration (HWA) for AVCHD/h.264 and HEVC (h.265) as there is no Intel integrated GPU (iGPU)

If you watch the Task Manager Performance graphs while exporting you should find the 1650 Ti is not doing any video encoding, the 3D Shader cores may be doing some rendering and the Decode may show some activity - the processor should be running under a high load due to software encoding - despite the 'Hardware encoding' label in the top of the export progress dialog. This is what the charts look like when the iGPU cannot be used for encoding to HEVC during export

With HWA using the iGPU the graphs look like this and the export is much quicker

John EB
Forum Moderator

@Jaka-Mele @johnebaker

Hi

From the MediaInfo data, the OBS recording is:

Overall bitrate: 721 kb/s, 1920 x 1080, 60 fps, AVC encoded.

To me this shows that there is something corrupt in the original .mkv file which is showing a very (impossibly) low overall bitrate for that resolution and frame rate, and yet it also shows a maximum bitrate of40mb/s at some point in the capture suggesting that the last part of the recording got seriously starved of bits.

Best to try recapturing the screen again in OBS with some different settings and maybe in .MP4 as john has suggested. Also record in H(X).265 if you are exporting from MEP in HEVC (H.265) as the compression structure of HEVC is quite different to H.264.

@CubeAce

Any reason why you are suggesting using CBR? This is almost never a good setting for encodes generally as it wastes bits on low complexity scenes / frames which could be better utilised elsewhere.

Peter

@Scenestealer

Hi Peter.

No reason beyond I prefer the look of the exports from OBS over telling it to use VBR and the difference in the exported file sizes not so great. VBR to my eye means I see more blockiness and more banding of graduations than I get using CBR at those settings. The recordings are still much smaller in file size compared to what my cameras produce so disk storage to me is not a priority concern whereas the ability to edit them and reproduce them after editing with minimal quality loss is.

Ray.

@CubeAce

Hi Ray

Interesting - and I did say generally - but the proof is in the pudding in your case.

I guess screen recordings in a lot of cases are not that complex so at a modest BR there is still plenty of headroom in the bitstream for each frame.

Peter