折腾：
【未解决】给安卓手机ViVo的iQOO U1x去批量测试VivoGame安卓游戏魔域前10个20201207
期间，报错：
[201207 16:36:58][MainUtils.py 4547] Clicked 确定(15s) of location=(740, 565, 55, 31), pos=(767.5, 580.5)
[201207 16:36:58][AppCrawler.py 90 ] cannot write mode RGBA as JPEG
Traceback (most recent call last):
File "/Users/xxx/dev/xxx/crawler/appAutoCrawler/AppCrawler/venv/lib/python3.8/site-packages/PIL/JpegImagePlugin.py", line 615, in _save
rawmode = RAWMODE[im.mode]
KeyError: 'RGBA'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/Users/xxx/dev/xxx/crawler/appAutoCrawler/AppCrawler/src/AppCrawler.py", line 84, in start
self.set_InitialUrl()
File "/Users/xxx/dev/xxx/crawler/appAutoCrawler/AppCrawler/src/AppCrawler.py", line 159, in set_InitialUrl
self.doGameAutoTest()
File "/Users/xxx/dev/xxx/crawler/appAutoCrawler/AppCrawler/src/AppCrawler.py", line 782, in doGameAutoTest
while (curRetryNum <= intoHomePageCheckMaxRetryNum) and (not self.waitStartToHome(curRetryNum)):
File "/Users/xxx/dev/xxx/crawler/appAutoCrawler/AppCrawler/src/AppCrawler.py", line 251, in waitStartToHome
if self.clickStartGameButton():
File "/Users/xxx/dev/xxx/crawler/appAutoCrawler/AppCrawler/src/common/MainUtils.py", line 4629, in clickStartGameButton
return self.clickButton(startStrList)
File "/Users/xxx/dev/xxx/crawler/appAutoCrawler/AppCrawler/src/common/MainUtils.py", line 4589, in clickButton
clickedInfo = self.clickFoundLocation(matchResult, imgPath)
File "/Users/xxx/dev/xxx/crawler/appAutoCrawler/AppCrawler/src/common/MainUtils.py", line 4573, in clickFoundLocation
curImg = CommonUtils.imageDrawRectangle(imgPath, specificMatchLocation)
File "/Users/xxx/dev/xxx/crawler/appAutoCrawler/AppCrawler/utils/common_utils.py", line 529, in imageDrawRectangle
inputImg.save(newImgPath)
File "/Users/xxx/dev/xxx/crawler/appAutoCrawler/AppCrawler/venv/lib/python3.8/site-packages/PIL/Image.py", line 2102, in save
save_handler(self, fp, filename)
File "/Users/xxx/dev/xxx/crawler/appAutoCrawler/AppCrawler/venv/lib/python3.8/site-packages/PIL/JpegImagePlugin.py", line 617, in _save
raise OSError("cannot write mode %s as JPEG" % im.mode)
OSError: cannot write mode RGBA as JPEG
去找代码：
utils/common_utils.py
@staticmethod def imageDrawRectangle(inputImgOrImgPath, 。。。 inputImg.save(newImgPath) return inputImg
其中报错的细节是：
rawmode = RAWMODE[im.mode] KeyError: 'RGBA'
说是不支持？
但是之前大量测试，都是没问题的。
python Image cannot write mode RGBA as JPEG
“JPG does not support transparency – RGBA means Red, Green, Blue, Alpha – Alpha is transparency.
You need to discard the Alpha Channel or save as something that supports transparency – like PNG.
The Image class has a method convert which can be used to convert RGBA to RGB – after that you will be able to save as JPG.”
解释的清楚
去写代码：
foundJpeg = re.search("\.jpe?g$", newImgPath, re.I)
isSaveJpeg = bool(foundJpeg)
if isSaveJpeg:
if inputImg.mode in ("RGBA", "P"):
# JPEG not support 'Alpha' transparency, so need convert to RGB, before save RGBA/P to jpeg
inputImg = inputImg.convert("RGB")
inputImg.save(newImgPath)调试看看
另外去回复了
【后记】
如果实测发现图片去掉 alpha 透明后，效果有问题，则参考
“n most cases the discarding the alpha channel will give you undesirable result, because transparent pixels also have some unpredictable colors. It is much better to fill transparent pixels with certain color:”
去试试：
fill_color = '' # your background
image = Image.open(file_path)
if image.mode in ('RGBA', 'LA'):
background = Image.new(image.mode[:-1], image.size, fill_color)
background.paste(image, image.split()[-1])
image = background
im.save(hidpi_path, file_type, quality=95)后来调试到了：
foundJpeg = re.search("\.jpe?g$", newImgPath, re.I) # <re.Match object; span=(66, 70), match='.jpg'>
isSaveJpeg = bool(foundJpeg) # True
if isSaveJpeg:
if inputImg.mode in ("RGBA", "P"): # 'RGBA'
# JPEG not support 'Alpha' transparency, so need convert to RGB, before save RGBA/P to jpeg
inputImg = inputImg.convert("RGB") # <PIL.Image.Image image mode=RGB size=1600x720 at 0x107E5DAF0>
inputImg.save(newImgPath) # 'debug/Android/app/游戏app/screenshot/20201208_142621_drawRect_154x42.jpg'
是可以解决问题的。
【总结】
- 背景
- JPG不支持 透明=alpha=transparency
- （Pilow的Image的）图片模式是RGBA、P，包含这个透明alpha
- 结果导致
- 把RGBA图片转为JPG报错
- cannot write mode RGBA as JPEG
- 把P模式图片转为JPG报错
- cannot write mode P as JPEG
- 解决办法
- 在把带alpha透明的RGBA、P转成JPG之前，丢弃掉alpha透明
- 如何丢弃alpha透明？
- 比如
- 转换成RGB模式
- 然后再去保存未JPG
- 代码
foundJpeg = re.search("\.jpe?g$", newImgPath, re.I) # <re.Match object; span=(66, 70), match='.jpg'>
isSaveJpeg = bool(foundJpeg) # True
if isSaveJpeg:
if inputImg.mode in ("RGBA", "P"): # 'RGBA'
# JPEG not support 'Alpha' transparency, so need convert to RGB, before save RGBA/P to jpeg
inputImg = inputImg.convert("RGB") # <PIL.Image.Image image mode=RGB size=1600x720 at 0x107E5DAF0>
inputImg.save(newImgPath) # 'debug/Android/app/游戏app/screenshot/20201208_142621_drawRect_154x42.jpg'即可。
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