Fixed task creation for videos with uneven dimensions. (cvat-ai#1594)

* used yuv420p format for compressed and original chunks

* updated changelog

CHANGELOG.md

@@ -55,6 +55,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fixed an error when exporting a task with cuboids to any format except CVAT (<https://github.com/opencv/cvat/pull/1577>)
 - Synchronization with remote git repo (<https://github.com/opencv/cvat/pull/1582>)
 - A problem with mask to polygons conversion when polygons are too small (<https://github.com/opencv/cvat/pull/1581>)
+- Unable to upload video with uneven size (<https://github.com/opencv/cvat/pull/1594>)
 
 ### Security
 -

cvat/apps/engine/media_extractors.py

@@ -1,4 +1,4 @@
-# Copyright (C) 2019 Intel Corporation
+# Copyright (C) 2019-2020 Intel Corporation
 #
 # SPDX-License-Identifier: MIT
 
@@ -304,10 +304,16 @@ def __init__(self, _):
  self._output_fps = 25
 
  @staticmethod
- def _create_av_container(path, w, h, rate, pix_format, options):
+ def _create_av_container(path, w, h, rate, options):
+ # x264 requires width and height must be divisible by 2 for yuv420p
+ if h % 2:
+ h += 1
+ if w % 2:
+ w += 1
+
  container = av.open(path, 'w')
  video_stream = container.add_stream('libx264', rate=rate)
- video_stream.pix_fmt = pix_format
+ video_stream.pix_fmt = "yuv420p"
  video_stream.width = w
  video_stream.height = h
  video_stream.options = options
@@ -320,14 +326,12 @@ def save_as_chunk(self, images, chunk_path):
 
  input_w = images[0][0].width
  input_h = images[0][0].height
- pix_format = images[0][0].format.name
 
  output_container, output_v_stream = self._create_av_container(
  path=chunk_path,
  w=input_w,
  h=input_h,
  rate=self._output_fps,
- pix_format=pix_format,
  options={
  "crf": str(self._image_quality),
  "preset": "ultrafast",
@@ -373,18 +377,11 @@ def save_as_chunk(self, images, chunk_path):
  output_h = input_h // downscale_factor
  output_w = input_w // downscale_factor
 
- # width and height must be divisible by 2
- if output_h % 2:
- output_h += 1
- if output_w % 2:
- output_w +=1
-
  output_container, output_v_stream = self._create_av_container(
  path=chunk_path,
  w=output_w,
  h=output_h,
  rate=self._output_fps,
- pix_format='yuv420p',
  options={
  'profile': 'baseline',
  'coder': '0',