Recording from the screen.

Gargam3L

Gargam3L

New Member
Hello
I'm wondering if anyone can help me sort this out.
I have tried to get to these settings below and which are marked in yellow but do not reach all the way. Are these possible? I like these settings and are taken from another group who are interested in recording from the screen.
Grateful if anyone could help me.


Format : Matroska
Format version : Version 4
File size : 897 MiB
Duration : 44 min 3 sek
Overall bit rate : 2 846 kb/s
Encoded date : UTC 2021-10-17 22:15:24
Writing application : mkvmerge v51.0.0.18 ('I Wish') 64-bit
Writing library : libebml v1.4.0 + libmatroska v1.6.2

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4
Format settings : CABAC / 4 Ref Frames
Format settings, CABAC : Ja
Format settings, Reference frames : 4 bildrutor
Codec ID : V_MPEG4/ISO/AVC
Duration : 44 min 3 sek
Bit rate : 2 715 kb/s
Nominal bit rate : 15,0 Mb/s
Width : 1 920 pixlar
Height : 1 080 pixlar
Display aspect ratio : 16:9
Frame rate mode : Konstant
Frame rate : 25,000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bit
Scan type : Progressiv
Bits/(Pixel*Frame) : 0.052
Stream size : 856 MiB (95%)
Writing library : x264 core 148
Encoding settings : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x1:0x131 / me=hex / subme=10 / psy=0 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=2 / 8x8dct=0 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=0 / threads=28 / lookahead_threads=2 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / paff=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=0 / intra_refresh=0 / rc_lookahead=40 / rc=cbr / mbtree=1 / bitrate=15000 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / vbv_maxrate=15000 / vbv_bufsize=15000 / nal_hrd=cbr / filler=1 / ip_ratio=1.00 / aq=1:0.00
Default : Ja
Forced : Nej
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
 
These settings are copied from MediaInfo, which displays the video properties of a given video.
Forget this. These settings are not suited to your PC, and these settings are not suited to the material you intend to record.
Instead, in OBS, do Tools->Auto Configuration Wizard. This will get you settings that work best for your PC.
 
Hi Gargamel,

no - unfortunately not. Whatever you excited on that specific video file, it can't just "replayed".

Let me explain: Given a nominal bandwidth, you can't enforce to reach for a specific bitrate like 2715 kbps (or any other given figure). Even if you invest time to replay exactly as possible such parameters for ffmpeg (what it would mean) you can't enforce target figures that by nature heavily depend on this specific video content (by any frame and each pixel of each frame!) which was encoded into that specific file. You have to understand how an encoder works. Especially due to the fact that these modern video codecs are not lossless encoders.

To give you another example: If you had all the counts and figures of new york stock exchange as of last friday, 4pm, you try something like "i look for someone i may give those figures to and he ensures that the complete stock exchange state could be replayed in reality on next friday again."

See how hopeless this is? The figures depend on too much circumstances you can't control.

If you want to reach for a specific target bitrate, you have to go for CBR (constant bit rate). So can reach for nearby your wished values. But beware: CBR is meant for streaming due to network restrictions and mean a tradeoff or compromise to the videos quality. That would be exactly the contrary of what you wished, isn't it?

Personally i think you were astonished by the quality of this specific video. But this specific ratio between quality and final size of a video is fixed to that specific video content.
 
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