https://bugs.kde.org/show_bug.cgi?id=443105

            Bug ID: 443105
           Summary: ffmpeg continues beyond the range specified in Krita.
           Product: krita
           Version: nightly build (please specify the git hash!)
          Platform: Microsoft Windows
                OS: Microsoft Windows
            Status: REPORTED
          Severity: minor
          Priority: NOR
         Component: Animation
          Assignee: krita-bugs-n...@kde.org
          Reporter: healer.ha...@gmail.com
  Target Milestone: ---

Created attachment 142001
  --> https://bugs.kde.org/attachment.cgi?id=142001&action=edit
Progress bar.

SUMMARY
If an existing png frames existed in the directory with range 0-970, and you
specified Krita to render a new animation from frame 0-100, Krita would
overwrite the existing png frames from 0-100; The frames from 101-970 still
exist. This would result into a concatenation of the new frame 0-100 and old
frame 101-970, and a progress bar like in the attachment. This old frame of
0-970 should have been automatically deleted by Krita after the video is
exported, but it's possible to postpone it by cancelling the saving of png
frames, or by manually saving it as png frames.

STEPS TO REPRODUCE
1. At frame 0, draw a "0". at frame 24, draw a "24". at frame 60, draw a "60".
2. Render animation as png frames with range 0-100.
3. Render animation as video with range 0-30.

OBSERVED RESULT
Two different frames are concatenated.

EXPECTED RESULT
Krita renders video from range 0-30.

SOFTWARE/OS VERSIONS
Windows: 10
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION
Krita

 Version: 5.0.0-beta1 (git 0986afa)
 Languages: en_US, en
 Hidpi: false

Qt

  Version (compiled): 5.12.11
  Version (loaded): 5.12.11

OS Information

  Build ABI: x86_64-little_endian-llp64
  Build CPU: x86_64
  CPU: x86_64
  Kernel Type: winnt
  Kernel Version: 10.0.15063
  Pretty Productname: Windows 10 (10.0)
  Product Type: windows
  Product Version: 10

OpenGL Info

  Vendor:  "Google Inc." 
  Renderer:  "ANGLE (Intel(R) HD Graphics Direct3D11 vs_5_0 ps_5_0)" 
  Version:  "OpenGL ES 3.0 (ANGLE 2.1.0.57ea533f79a7)" 
  Shading language:  "OpenGL ES GLSL ES 3.00 (ANGLE 2.1.0.57ea533f79a7)" 
  Requested format:  QSurfaceFormat(version 3.0, options
QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24,
redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 8,
stencilBufferSize 8, samples -1, swapBehavior QSurfaceFormat::DoubleBuffer,
swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile 
QSurfaceFormat::CompatibilityProfile) 
  Current format:    QSurfaceFormat(version 3.0, options
QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize 24, redBufferSize 8,
greenBufferSize 8, blueBufferSize 8, alphaBufferSize 8, stencilBufferSize 8,
samples 0, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0,
colorSpace QSurfaceFormat::DefaultColorSpace, profile 
QSurfaceFormat::NoProfile) 
     Version: 3.0
     Supports deprecated functions false 
     is OpenGL ES: true 

QPA OpenGL Detection Info 
  supportsDesktopGL: true 
  supportsAngleD3D11: true 
  isQtPreferAngle: true 

Hardware Information

  GPU Acceleration: auto
  Memory: 1946 Mb
  Number of Cores: 4
  Swap Location: C:/Users/User6/AppData/Local/Temp

Current Settings

  Current Swap Location: C:/Users/User6/AppData/Local/Temp
  Current Swap Location writable: true
  Undo Enabled: true
  Undo Stack Limit: 30
  Use OpenGL: true
  Use OpenGL Texture Buffer: true
  Disable Vector Optimizations: false
  Disable AVX Optimizations: false
  Canvas State: OPENGL_SUCCESS
  Autosave Interval: 900
  Use Backup Files: true
  Number of Backups Kept: 1
  Backup File Suffix: ~
  Backup Location: Same Folder as the File
  Backup Location writable: false
  Use Win8 Pointer Input: false
  Use RightMiddleTabletButton Workaround: false
  Levels of Detail Enabled: false
  Use Zip64: false


Display Information
Number of screens: 1
        Screen: 0
                Name: \\.\DISPLAY1
                Depth: 32
                Scale: 1
                Resolution in pixels: 1280x800
                Manufacturer: 
                Model: 
                Refresh Rate: 60

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