base64

问题 Audio file is sent to us via API which is Base64 encoded PCM format. I need to convert it to PCM and then WAV for processing. I was able to decode -> save to pcm -> read from pcm -> save as wav using the following code. decoded_data = base64.b64decode(data, ' /') with open(pcmfile, 'wb') as pcm: pcm.write(decoded_data) with open(pcmfile, 'rb') as pcm: pcmdata = pcm.read() with wave.open(wavfile, 'wb') as wav: wav.setparams((1, 2, 16000, 0, 'NONE', 'NONE')) wav.writeframes(pcmdata) It'd be a

问题 I tried to capture camera preview in android device and encode imagefiles to Base64 String. I've already tested like this // Convert Failed to Image private fun encoder1(filePath: File): String{ val bytes = filePath.readBytes() val base64 = android.util.Base64.encodeToString(bytes, android.util.Base64.NO_WRAP) return base64 } // Saved Broken Image private fun encoder2(imageUri: Uri): String { val input = this.contentResolver.openInputStream(imageUri) //val bm = BitmapFactory.decodeResource

问题 List item I'm trying to send a JPG image (captured by ImagePicker in emulator) via HTTP POST with base64 encoding to an AWS REST API. But readAsBytesSync() operation only reads a (head) part of the image (I've tested it printing to the string as bytes) thus base64 can only encode that small part. What may be the reason, many thanks for your help in advance. Future<void> captureImage(ImageSource imageSource) async { try { ImagePicker picker = ImagePicker(); final pickedFile = await picker

问题 I use websockets to receive video frames. Image is encoded in base64 mimetype image/jpeg. I'm trying to convert image to np.ndarray. When I read image file code works correct. But when I'm trying to read image from socket stream, issue is occured. image_data = base64.b64decode(part.encoded_image) np_array = np.frombuffer(image_data, np.uint8) image = cv2.imdecode(np_array, cv2.IMREAD_UNCHANGED) In docs cv2.imdecode() returns None in case when image is short or corrupted. My image is in HD

问题 I have 3 questions about base64: 1) The base64 encoding purpose is binary-to-text. Isn't text going to be sent through web as binary? Then what is good for? 2) In past they used 7-bit communication systems, now it's 8-bit. Then why we still using it now? 3) How it increases the size? I just take 3-bytes with 28-bit and rearrange them to 4-bytes of 6-bit but in total they still 28-bit? 回答1: 1) The purpose is not only binary to text encoding, but also to encode text which uses specific

问题 I've been struggling to find a supported solution to encode images (from assets) and photo picker to base64string. I can do this via Swift in a straight native app. func convertImageTobase64(format: ImageFormat, image:UIImage) -> String? { var imageData: Data? switch format { case .png: imageData = image.pngData() case .jpeg(let compression): imageData = image.jpegData(compressionQuality: compression) } return imageData?.base64EncodedString() } var mylogo: UIImage? = UIImage.init(named: "DFU

问题 Guys I am facing this issue since 2 days straight. I want to pick an image from gallery and convert it to Base64 method. I have tried Picasso but my imageview is large. Can you please help me. I tried everything but out of memory is too much for me when converting it to bitmap and then to base64. BitmapDrawable drawable = (BitmapDrawable) ProfilePic.getDrawable(); yourSelectedIBitmapDrawable drawable = (BitmapDrawable) ProfilePic.getDrawable(); yourSelectedImage = drawable.getBitmap();mage =

问题 I'm using an online service which need an image in base 64. I've done a simple form where I can upload an image, and then my php encode the image in base 64, like this : $base64Image = base64_encode(file_get_contents($_FILES['image']['tmp_name'])); I then pass it in a json array, and the other page tries to display the image with my data, but it fails (it has the missing image icon) and in Chrome console I have the error : page.php:1 GET data:image/png; base64,

问题 I'm playing with cryptopp and have trouble with Base64 encoding/decoding. In the following code hypothetically sig value should be equal tsig , but they are different on a last character ( sig bigger then tsig by one symbol). I've tried also change insertLineBreaks parameter in Base64Encoder but the result is same. ... RSASSA_PKCS1v15_SHA_Signer privkey(privateKey); SecByteBlock sbbSignature(privkey.SignatureLength()); privkey.SignMessage(rng, (byte const*) strContents.data(), strContents

问题 I'm having trouble decoding a ASP.NET view state string in Python 3. When I try decoding the string using bash's base64 command, it decodes the string successfully and I'm able to see all the information I need (most of it is in Hebrew, meaning UTF-8). The view state is of course base64-encoded only and not encrypted. However, when I try do decode the string using Python's base64 library and then decoding the byte array to a UTF-8 string, I get an error message: UnicodeDecodeError: 'utf-8'