Fixed image quality for tasks created from images (#2963)

* fixed image quality for images

* updated changelog

CHANGELOG.md

@@ -66,6 +66,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - An error about track shapes outside of the task frames during export (<https://github.com/openvinotoolkit/cvat/pull/2890>)
 - Fixed project search field updating (<https://github.com/openvinotoolkit/cvat/pull/2901>)
 - Fixed export error when invalid polygons are present in overlapping frames (<https://github.com/openvinotoolkit/cvat/pull/2852>)
+- Fixed image quality option for tasks created from images (<https://github.com/openvinotoolkit/cvat/pull/2963>)
 
 ### Security
 

cvat/apps/engine/media_extractors.py

@@ -313,8 +313,7 @@ class VideoReader(IMediaReader):
 
 class IChunkWriter(ABC):
     def __init__(self, quality, dimension=DimensionType.DIM_2D):
-        # translate inversed range [1:100] to [0:51]
+        self._image_quality = quality
-        self._image_quality = round(51 * (100 - quality) / 99)
         self._dimension = dimension
 
     @staticmethod
@@ -375,6 +374,8 @@ class ZipCompressedChunkWriter(IChunkWriter):
 
 class Mpeg4ChunkWriter(IChunkWriter):
     def __init__(self, quality=67):
+        # translate inversed range [1:100] to [0:51]
+        quality = round(51 * (100 - quality) / 99)
         super().__init__(quality)
         self._output_fps = 25
         try: