Dropped frames with VHS capture

SteevE-G

New Member
Hi, maybe the fps you chose doesn't match with your source VHS. I suggest you try again with OBS setup at 25fps instead of 30. No guarantee but you can try and see if the result is better.
 

BluePeer

Member
oO if i look to the logfile

13:36:32.677: CPU Name: AMD E1-6015 APU with Radeon(TM) HD Graphics
13:36:32.677: CPU Speed: 1397MHz
13:36:32.677: Physical Cores: 2, Logical Cores: 2

the system have 0 Power
and use x264
related to the change from frame to frame the requiered CPU power can increase "massive"
take a look of the CPU Usage if this is over 80% of each of the cores you can loose frames on "spikes"
frome the log record duration and the frame issues it looks for me like a simple CPU bottleneck one some frames that need more power to encode in realtime then the cpu can handle.
A Simple windows or other application (firewall/defener) can result in framelost related to the 0 CPU power
its not 0 but ~ 1 of 15/ 1 of 35 of a "regular" cpu power
 

jeanpile

New Member
@BluePeer
i have the issue when i see the screen and CPU is low.

@cyclemat
>have you try to set the base resoluton same as the output resolution ?
No because i only 2 (high) base resolutions. I need for VHS resolution only 320x240 but i don't see it.
I read : VHS is interlaced.
I have no color issue. But i can try what other system ? I have no NV12 (see my log and i don't know why)
BR
 

BluePeer

Member
@BluePeer
i have the issue when i see the screen and CPU is low.
Start OBS , make a record 60sec stop , close obs
go to the Log folder (can be open before close)
then after obs close open the last log file, at the end its a profiler

some close to the end it start with
"
18:34:50.072: == Profiler Results =============================
18:34:50.072: run_program_init: 3337.93 ms"
post this and below and we see the timings
 

carlmmii

Active Member
Set your color space back to NV12. You're using RGB which is forcing full CPU compositing on that poor chip.

If you're NTSC:
- Set your framerate back to 30fps
- Apply a deinterlacing filter for discard (right-click on your capture source, select deinterlace, pick discard option)

If you're PAL:
- Set your capture card's framerate to 25fps
- Don't deinterlace
 

jeanpile

New Member
Hi
Nothing.
On the beginning of capture VHS, i remember in 2005, our PCs were no very fast. And no issue.
is it possible to recorder without see on screen and or without encoder?
BR
 
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