decode | 易学教程

Using LibRaw to correctly decode CR2 image?

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问题 My eventual goal is to decode CR2 images from multiple cameras for display in a desktop gui. Using the LibRaw image decoding library, I've used the sample project to attempt to decode a CR2 image into a .TIFF file. The original file as a jpg thumbnail is as follows: Image 1 And the original CR2 after decoding and saving into a .TIFF is as follows: Image 2 As you can see, the outcome is slightly brighter and yellowish. The sample project was contains the following parameters for decoding

Convert.FromBase64String() throws “invalid Base-64 string” error

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问题 I have a key which is Base64 encoded. While trying to decode I am receiving the following error. The error is thrown by byte[] todecode_byte = Convert.FromBase64String(data); Error in base64DecodeThe input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters. I am using the below method to decode this: public string base64Decode(string data) { try { System.Text.UTF8Encoding encoder = new

Convert.FromBase64String() throws “invalid Base-64 string” error

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Is it possible for Python to read non-ascii text from file?

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问题 I have a .txt file that is UTF-8 formatted and have problems to read it into Python. I have a large number of files and a conversion would be cumbersome. So if I read the file in via for line in file_obj: ... I get the following error: File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/encodings/ascii.py", line 26, in decode return codecs.ascii_decode(input, self.errors)[0] UnicodeDecodeError: 'ascii' codec can't decode byte 0xc2 in position 291: ordinal not in range(128) I

Instruction Decoding in x86 architecture [closed]

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问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 6 years ago . I am working on a operating system project for my lab where I've to work with the instruction pointer and instruction opcode. Right now all I need to know is what type of instruction it is. For that I'm reading the data from the address pointed by instruction pointer. The first

Python爬虫_unable to decode value

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一、问题描述 Form Data表单里面出现参数值为：unable to decode value ，导致python爬虫时返回页面源代码丢失内容网站源码编码为GBK 二、解决方法提交的form表单参数值编码转换：“orgName”: “北京”.encode(“GBK”), 'page_flag' : 'true' , 'pagesize_key' : 'baXyBasicInfoXxgsList' , 'page_size' : '10' , "page_order" : "" , "goto_page" : "" , "current_page" : "1" , "total_count" : "14913" , "legalName" : "" , "xingYongDaiMa" : "" , "corporateType" : "" , "registrationNo" : "" , "orgName" : "北京" . encode ( "GBK" ) , "ps" : "10" , "to_page" : "1" , 来源： CSDN 作者： Shrimay1 链接： https://blog.csdn.net/weixin_43411585/article/details/103821273

Using ffplay or ffmpeg how can I get a pixel's rgb value in a frame

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问题 I would like to extract a pixel's rgb value in every frame that is decoded using ffmpeg. I looked into ffplay source code get_video_frame video_refresh queue_picture I tried the above three methods to hook on to the frame but I do not understand how to get a pixel's rgb value. Could anyone kindly give some pointer into this 回答1: http://ffmpeg.zeranoe.com/forum/viewtopic.php?f=15&t=805 Thats the source and this is the conversion source I used and it works as expected. Hope this helps someone

Detect and decode multiple 2d (Datamatrix, QRcode) from an image

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问题 I'm working on a project which involves taking an image file as input on my desktop and then detecting and decoding all the barcodes present, both 1D and 2D. I've been working with zxing and with the help of GenericMultipleBarcodeReader I was able to read multiple 1D barcodes from the image. However, it fails to detect 2D barcodes. But if I crop the 2D barcode and input this cropped part separately it detects and decodes it without any problem. So, if my image has 2 1D barcode and a 2D

@name: (unable to decode value)

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这是编码格式不一致引起的第一种： <html:form method="post" action="/business/person/person.do" enctype="multipart/form-data"> 在form标签中加入enctype="multipart/form-data" 第二种：使用encodeURI函数来源： CSDN 作者： qq_34225004 链接： https://blog.csdn.net/qq_34225004/article/details/103799465

android fastest way to decode mp3 to pcm data

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问题 in my app i need to decode an mp3 file into a pcm buffer. that's a lot of data so i downsample it to mono 22050Hz as i read and decode it. at the moment i'm using javazoom jlayer decoder http://www.javazoom.net/javalayer/javalayer.html its working but its slow, 30secs to decode a 3min song in run mode, ages in debug mode. on my windows machine using libmpg i can do that in about 1 second. is there a faster way that anyone knows for sure is faster? i don't want to waste time implementing