File size variation

SunDog1608

New Member
I happened to record a Zoom conference on 2 computers (I wasn't sure if my laptop would die before it finished, so I recorded from my desktop as a backup), and noticed that the laptop created a 32gb file whereas the desktop created a 2gb file. The setting were nearly identical within OBS. I played around a bit more and made the settings exactly identical on both computers but found that my desktop consistently creates files that are a lot smaller. Looking at the log files, the best I can find is that the desktop is recording recording a lot fewer FPS even though both are set to 30FPS. Is this why the file size is so much smaller? What is the cause of this, low system resources on my desktop? For a zoom conference, it's actually fine to record at a low FPS and I would prefer the smaller file, but just trying to figure out what's going on to cause this.

Laptop
11:16:17.358: >>> nv12 tex not active, fall back to old qsv encoder
11:16:17.358: [qsv encoder: 'simple_h264_recording'] settings:
11:16:17.358: rate_control: ICQ
11:16:17.358: ICQ Quality: 23
11:16:17.358: fps_num: 30
11:16:17.358: fps_den: 1
11:16:17.358: width: 1920
11:16:17.358: height: 1080
11:16:17.358: [qsv encoder: 'simple_h264_recording'] debug info:
11:16:17.402: impl: D3D11
11:16:17.402: surf: D3D11
11:16:17.499: m_nSurfNum: 12
11:16:17.501: m_nTaskPool: 4
11:16:17.501: major: 1
11:16:17.501: minor: 23
11:16:17.501: ---------------------------------
11:16:17.502: [FFmpeg aac encoder: 'simple_aac_recording'] bitrate: 192, channels: 2, channel_layout: 3
11:16:17.502:
11:16:17.512: ==== Recording Start ===============================================
11:16:17.513: [ffmpeg muxer: 'simple_file_output'] Writing file 'C:/Users/a1/Downloads/2022-04-01 11-16-ScreenRecording.mp4'...
11:16:17.553: [qsv encoder: 'simple_h264_recording'] settings:
11:16:17.553: rate_control: ICQ
11:16:17.553: ICQ Quality: 23
11:16:17.553: fps_num: 30
11:16:17.553: fps_den: 1
11:16:17.553: width: 1920
11:16:17.553: height: 1080
11:16:17.553: [qsv encoder: 'simple_h264_recording'] debug info:
11:16:17.663: m_nSurfNum: 12
11:16:17.665: m_nTaskPool: 4
11:17:18.428: [ffmpeg muxer: 'simple_file_output'] Output of file 'C:/Users/a1/Downloads/2022-04-01 11-16-ScreenRecording.mp4' stopped
11:17:18.428: Output 'simple_file_output': stopping
11:17:18.428: Output 'simple_file_output': Total frames output: 1818
11:17:18.428: Output 'simple_file_output': Total drawn frames: 1828
11:17:18.428: ==== Recording Stop ================================================



Desktop
12:21:18.967: >>> nv12 tex not active, fall back to old qsv encoder
12:21:18.967: [qsv encoder: 'simple_h264_recording'] settings:
12:21:18.967: rate_control: ICQ
12:21:18.967: ICQ Quality: 23
12:21:18.967: fps_num: 30
12:21:18.967: fps_den: 1
12:21:18.967: width: 1920
12:21:18.967: height: 1080
12:21:18.967: [qsv encoder: 'simple_h264_recording'] debug info:
12:21:18.991: impl: D3D11
12:21:18.991: surf: D3D11
12:21:19.034: m_nSurfNum: 12
12:21:19.037: m_nTaskPool: 4
12:21:19.037: major: 1
12:21:19.037: minor: 20
12:21:19.037: ---------------------------------
12:21:19.038: [FFmpeg aac encoder: 'simple_aac_recording'] bitrate: 192, channels: 2, channel_layout: 3
12:21:19.038:
12:21:19.098: ==== Recording Start ===============================================
12:21:19.098: [ffmpeg muxer: 'simple_file_output'] Writing file 'C:/Users/Alex/Downloads/ScreenRecording2022-04-01 12-21-18.mp4'...
12:21:19.134: [qsv encoder: 'simple_h264_recording'] settings:
12:21:19.134: rate_control: ICQ
12:21:19.134: ICQ Quality: 23
12:21:19.134: fps_num: 30
12:21:19.134: fps_den: 1
12:21:19.134: width: 1920
12:21:19.134: height: 1080
12:21:19.134: [qsv encoder: 'simple_h264_recording'] debug info:
12:21:19.259: m_nSurfNum: 12
12:21:19.264: m_nTaskPool: 4
12:21:24.871: [ffmpeg muxer: 'simple_file_output'] Output of file 'C:/Users/Alex/Downloads/ScreenRecording2022-04-01 12-21-18.mp4' stopped
12:21:24.871: Output 'simple_file_output': stopping
12:21:24.871: Output 'simple_file_output': Total frames output: 161
12:21:24.871: Output 'simple_file_output': Total drawn frames: 152 (175 attempted)
12:21:24.871: Output 'simple_file_output': Number of lagged frames due to rendering lag/stalls: 23 (13.1%)
12:21:24.871: ==== Recording Stop ================================================
 
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