我希望使用没有-p标志的adb screencap实用程序.我想象输出将以原始格式转储,但看起来不像.我尝试使用Pillow(
python)库打开原始图像文件导致：
$adb pull /sdcard/screenshot.raw screenshot.raw
$python
>>> from PIL import Image
>>> Image.open('screenshot.raw')
Traceback (most recent call last):
File "<stdin>",line 1,in <module>
File "/Users/....../lib/python2.7/site-packages/PIL/Image.py",line 2025,in open
raise IOError("cannot identify image file")
IOError: cannot identify image file
找不到像这样阅读原始图像的正确方法,我甚至给了以下镜头：How to read a raw image using PIL?
>>> with open('screenshot.raw','rb') as f:
... d = f.read()
...
>>> from PIL import Image
>>> Image.frombuffer('RGB',len(d),d)
__main__:1: RuntimeWarning: the frombuffer defaults may change in a future release; for portability,change the call to read:
frombuffer(mode,size,data,'raw',mode,1)
Traceback (most recent call last):
File "<stdin>",in <module>
File "/Users/..../lib/python2.7/site-packages/PIL/Image.py",line 1896,in frombuffer
return frombytes(mode,decoder_name,args)
File "/Users/..../lib/python2.7/site-packages/PIL/Image.py",line 1821,in frombytes
im = new(mode,size)
File "/Users/..../lib/python2.7/site-packages/PIL/Image.py",line 1787,in new
return Image()._new(core.fill(mode,color))
TypeError: must be 2-item sequence,not int
所有可能的模式选项都会导致相同的TypeError异常.
这是hexdump实用程序揭示的内容：
$hexdump -C img.raw | head 00000000 d0 02 00 00 00 05 00 00 01 00 00 00 1e 1e 1e ff |................| 00000010 1e 1e 1e ff 1e 1e 1e ff 1e 1e 1e ff 1e 1e 1e ff |................| * 000038c0 1e 1e 1e ff 1e 1e 1e ff 21 21 21 ff 2b 2b 2b ff |........!!!.+++.| 000038d0 1e 1e 1e ff 1e 1e 1e ff 1e 1e 1e ff 1e 1e 1e ff |................| * 00004400 1e 1e 1e ff 1e 1e 1e ff 47 47 47 ff 65 65 65 ff |........GGG.eee.| 00004410 20 20 20 ff 1e 1e 1e ff 1e 1e 1e ff 1e 1e 1e ff | .............| 00004420 1e 1e 1e ff 1e 1e 1e ff 1e 1e 1e ff 1e 1e 1e ff |................| *
在osx上：
$file screenshot.raw screenshot.raw: data
screencap帮助页面没有显示关于没有-p标志的输出数据的格式：
$adb shell screencap -h usage: screencap [-hp] [FILENAME] -h: this message -p: save the file as a png. If FILENAME ends with .png it will be saved as a png. If FILENAME is not given,the results will be printed to stdout.
解决方法
感谢您的文件摘录,我猜您的原始文件格式为
width x height然后整个RGBA像素集(32位)(宽x高高倍)
在这里,我看到你拍摄了720×1280的图像..
width x height然后整个RGBA像素集(32位)(宽x高高倍)
在这里,我看到你拍摄了720×1280的图像..
可以使用ImageMagick工具集来帮助您以更合适的文件格式查看/转换它.
以下是可能对您有所帮助的示例
(ImageMagick转换命令,osx见http://cactuslab.com/imagemagick/)
# skip header info dd if=screenshot.raw of=screenshot.rgba skip=12 bs=1 # convert rgba to png convert -size 720x1280 -depth 8 screenshot.rgba screenshot.png
如果它不起作用,您可以尝试通过skip = 8和/或720×1280 by 1280×720更改skip = 12 ..
希望有所帮助
