Speed drops after extended clip-sequence export

MilkAndBanana1 commented 9 months ago

Bug description

Used it auto-editor to a batch file. Using hevc_nvenc. (ryzen 5 5600H,3060 laptop gpu) Inputted a 27 minute mkv file. First 50-70 files are fast, after 100+ it starts to slow down considerably.

What's your platform?

Windows.

What command did you use

set specialparams=--my-ffmpeg --video-codec hevc_nvenc --edit audio:stream=0,mincut=25,minclip=3 --margin 0.05sec,0.2sec --export clip-sequence

rem ##################### SPLITTING THE CLIPS

md edited_clips
set "folder=%~dp0\edited_clips"
set /p inputFile=Enter the name of the file to open: 
auto-editor.exe "%inputFile%" -o "edited_clips/clips.mp4" !specialparams!

What properties does your input video have?

.\podcast23.mkv:

video:
- track 0:
  - codec: h264
  - fps: 19001/317
  - resolution: 1920x1080
  - aspect ratio: 16:9
  - pixel aspect ratio: 1:1
  - pix fmt: yuv420p
  - color range: tv
  - color space: bt709
  - color primaries: bt709
  - color transfer: bt709
  - timebase: 1/1000
audio:
- track 0:
  - codec: aac
  - samplerate: 48000
  - channels: 2
- track 1:
  - codec: aac
  - samplerate: 48000
  - channels: 2
container:
- duration: 1629.044
- bitrate: 102590866
Metadata: ENCODER : Lavf60.3.100 Duration: 00:27:09.04, start: 0.000000, bitrate: 102590 kb/s Stream #0:0: Video: h264 (High), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 59.94 fps, 59.94 tbr, 1k tbn Metadata: DURATION : 00:27:09.044000000 Stream #0:1: Audio: aac (LC), 48000 Hz, stereo, fltp Metadata: title : Track2 DURATION : 00:27:08.992000000 Stream #0:2: Audio: aac (LC), 48000 Hz, stereo, fltp Metadata: title : Track3 DURATION : 00:27:08.992000000

Comments

Have a feeling this is just CPU getting fried after multiple encodes but issuing this in case there's a potential optimization.

MilkAndBanana1 commented 9 months ago

Update: Merged the audio tracks and ran it through ffmpeg before doing so and it seems to be faster.

WyattBlue commented 9 months ago

I already know auto-editor can be slow when exporting as a clip-sequence when there are hundreds of clips. it's an O(n^2) operation due to file seeking being linear. I don't consider this a valid bug because I only have so much time on this earth to be spending time optimizing every last use case.

WyattBlue / auto-editor