Due to ROM size I have to compress the bootstrap with LZMA instead of deflate,
When the bootstrap is loaded, it is uncompressed by inflate by default from ROM to RAM.
Since the bootstrap is compressed by LZMA, it must be uncompressed by LZMA instead of inflate.
So how can I replace inflate with LZMA?
Problem soloved,
1. modify the ..\target\h\make\rules.vxWorks, use "programStore -f tmp.bin -c 4 -o tmp.Z" instead of $(COMPRESS) < tmp.bin > tmp.Z, you may want to add a new rule for your project
modify romStart.c, use decompress_lzma_7z for decompressing instead of UNCMP_RTN in romStart()
Related
I am trying to convert a dicom file to JPG which I would then use to show as thumbnail for the dicom file. I am using the code below to convert the dicom file but When I execute it I get the following error
'write': no encode delegate for this image format `' # error/constitute.c/WriteImage/1272 (Magick::ImageMagickError)
I am using ruby version 2.7.0 and I have installed ImageMagick 7.1.0-4 and the supportive gems. How to solve this error?
require 'dicom'
require 'rmagick'
include DICOM
dcm = DObject.read("sample.dcm")
image = dcm.image(:frame => 5)
image.normalize.write("test.jpeg");
I had to reinstall ImageMagick-7.1.0-26 along with libgdcm-tools on my system and the above mentioned code worked fine. So Imagemagick needs these additional libraries (libjpeg62-dev, libtiff-dev, libpng-dev, libpng12-0 and libgdcm-tools) to work with these image types. I don't know if this is correct or not but that the problem I was facing has been resolved by following this approach. Here are some of the links which helped me in solving this
Install ImageMagick with JPG TIFF and PNG Delegates
How to configure and build with libgcdm for lossless jpeg conversion
and dicom support
I have a file made with a program , an image sticker maker .
I know this program saves it's images(probably an image, a bg and a mask) into single file with extension ".adf" .
I couldn't convert the output file with image magick cause of below error :
convert: no decode delegate for this image format `output.adf' # error/constitute.c/ReadImage/532.
I don't know how this Image converted with Image magick .
it's my -list configure result :
Path: [built-in]
Name Value
-------------------------------------------------------------------------------
NAME ImageMagick
Path: configure.xml
Name Value
-------------------------------------------------------------------------------
CC vs10
COPYRIGHT Copyright (C) 1999-2011 ImageMagick Studio LLC
DELEGATES bzlib freetype jpeg jp2 lcms png tiff x11 xml wmf zlib
FEATURES OpenMP
HOST Windows
LIB_VERSION 0x671
LIB_VERSION_NUMBER 6,7,1,0
NAME ImageMagick
RELEASE_DATE 2011-07-15
VERSION 6.7.1
WEBSITE http:// www.image magick.org
I attached the file :
src.adf
* EDIT *
if I run file command on src.adf it tells :
root#MexHex-PC:# file -vv src.adf
file-5.25
magic file from /etc/magic:/usr/share/misc/magic
What's missed !?
Thanks
This src.adf looks like a very minimal & flat data file. I know nothing about Dalahoo3D and/or ArcGis products, but we can quickly extract the embedded images with python.
import struct
with open('src.adf', 'rb') as f:
# Calculate file size.
f.seek(0, 2)
total_bytes = f.tell()
# Rewind to beging.
f.seek(0)
file_cursor = f.tell()
image_cursor = 0
while file_cursor < total_bytes:
# Can for start of JPEG.
if f.read(1) == b"\xFF":
if f.read(3) == b"\xD8\xFF\xE0":
print("JPEG FOUND!")
# Backup and find the size of the image
f.seek(-8, 1)
payload_size = struct.unpack('<I', f.read(4))[0]
# Write image to disk
d_filename = 'image{0}.jpeg'.format(image_cursor)
with open(d_filename, 'wb') as d:
d.write(f.read(payload_size))
image_cursor += 1
else:
f.seek(-3, 1) # Back cursor up, and try again.
file_cursor = f.tell()
Which dumps the following three images...
I'm sure this file was made with Imagemagick. I had already seen that one would convert the file to tiff image. He told me to do this with Imagemagick but did not explain the method.
I'm guessing this is just a matter of miscommunication. It's true that ImageMagick commonly handles JPEG / TIFF formats, but not geographic information systems and/or 3D modeling. That's usually extended by a vendor -- like ArcGIS. I would bet that ImageMagick is present in the workflow of generating TIFF files, but .ADF wouldn't be supported by ImageMagick until someone writes a delegate coder.
Update
From this question, it looks like you'll need to extend ImageMagick delegates to call GDAL utilities. You'll need to update the delegates.xml file to call the correct utility.
I have added this (https://github.com/kewlbear/FFmpeg-iOS-build-script) version of ffmpeg to my project. I can't see the entry point to the library in the headers included.
How do I get access to the same text command based system that the stand alone application has, or an equivalent?
I would also be happy if someone could point me towards documentation that allows you to use FFmpeg without the command line interface.
This is what I am trying to execute (I have it working on windows and android using the CLI version of ffmpeg)
ffmpeg -framerate 30 -i snap%03d.jpg -itsoffset 00:00:03.23333 -itsoffset 00:00:05 -i soundEffect.WAV -c:v libx264 -vf fps=30 -pix_fmt yuv420p result.mp4
Actually you can build ffmpeg library including the ffmpeg binary's code (ffmpeg.c). Only thing to care about is to rename the function main(int argc, char **argv), for example, to ffmpeg_main(int argc, char **argv) - then you can call it with arguments just like you're executing ffmpeg binary. Note that argv[0] should contain program name, just "ffmpeg" should work.
The same approach was used in the library VideoKit for Android.
To do what you want, you have to use your compiled FFmpeg library in your code.
What you are looking for is exactly the code providing by FFmpeg documentation libavformat/output-example.c (that mean AVFormat and AVCodec FFmpeg's libraries in general).
Stackoverflow is not a "do it for me please" platform. So I prefer explaining here what you have to do, and I will try to be precise and to answer all your questions.
I assume that you already know how to link your compiled (static or shared) library to your Xcode project, this is not the topic here.
So, let's talk about this code. It creates a video (containing video stream and audio stream randomly generated) based on a duration. You want to create a video based on a picture list and sound file. Perfect, there are only three main modifications you have to do:
The end condition is not reaching a duration, but reaching the end of your file list (In code there is already a #define STREAM_NB_FRAMES you can use to iterate over all you frames).
Replace the dummy void fill_yuv_image by your own method that load and decode image buffer from file.
Replace the dummy void write_audio_frame by your own method that load and decode the audio buffer from your file.
(you can find "how to load audio file content" example on documentation starting at line 271, easily adaptable for video content regarding documentation)
In this code, comparing to your CLI, you can figure out that:
const char *filename; in the main should be you output file "result.mp4".
#define STREAM_FRAME_RATE 25 (replace it by 30).
For MP4 generation, video frames will be encoded in H.264 by default (in this code, the GOP is 12). So no need to precise libx264.
#define STREAM_PIX_FMT PIX_FMT_YUV420P represents your desired yuv420p decoding format.
Now, with these official examples and related documentation, you can achieve what you desire. Be careful that there is some differences between FFmpeg's version in these examples and current FFmpeg's version. For example:
st = av_new_stream(oc, 1); // line 60
Could be replaced by:
st = avformat_new_stream(oc, NULL);
st->id = 1;
Or:
if (avcodec_open(c, codec) < 0) { // line 97
Could be replaced by:
if (avcodec_open2(c, codec, NULL) < 0) {
Or again:
dump_format(oc, 0, filename, 1); // line 483
Could be replaced by:
av_dump_format(oc, 0, filename, 1);
Or CODEC_ID_NONE by AV_CODEC_ID_NONE... etc.
Ask your questions, but you got all the keys! :)
MobileFFMpeg is an easy to use pod for the purpose. Instructions on how to use MobileFFMpeg at: https://stackoverflow.com/a/59325680/1466453
MobileFFMpeg gives a very simple method for translating ffmpeg commands to your IOS objective-c program.
Virtually all ffmpeg commands and switches are supported. However you have to get the pod with appropriate license. e.g min-gpl will not give you features of libiconv. libiconv is convered in vidoe, gpl and full-gpl licenses.
Please highlight if you have specific issues regarding use of MobileFFMpeg
I would like to read/write XMP metadata in JPEG and PNG files.
I'm able to do this using the exiftool
~ $ exiftool -xmp-dc:description="FooBar" sample.png
1 image files updated
~ $ exiftool sample.png | grep "Description"
Description : FooBar
However, I'm not able to read the XMP Metadata using imagemagick
~ $ identify -verbose sample.png | grep "Description"
My reason to write XMP metadata is that so it can be read by Adobe Products.
Question
Is there a way to read/write XMP metadata using imagemagick?
What you want to ask is "does ImageMagick support reading or writing XMP (descriptive) metadata?". The answer to that question, from reading the documentation, is no. ImageMagick reads (almost) all metadata from a file, but not descriptive metadata.
If for some reason you must use ImageMagick to extract XMP metadata, you could try to include a filter. Filters can be configured to process image files, but they are not part of ImageMagick itself.
convert -ping yourimage.jpg XMP:-
Access XMP data can be done as follows:
ImageMagick.XmpProfile xmp = image.GetXmpProfile();
Console.WriteLine("\n\n----> xmp:" + xmp);
if (xmp != null)
{
you have to process the XML data of the XMPs result.
ie. use XPATH or some other XML interface.
}
OpenCV says something like
Corrupt JPEG data: premature end of data segment
or
Corrupt JPEG data: bad Huffman code
or
Corrupt JPEG data: 22 extraneous bytes before marker 0xd9
when loading a corrupt jpeg image with imread().
Can I somehow catch that? Why would I get this information otherwise?
Do I have to check the binary file on my own?
OpenCV (version 2.4) does not overwrite the basic error handling for libjpeg, making them 'uncatchable'. Add the following method to modules/highgui/src/grfmt_jpeg.cpp, right below the definition of error_exit():
METHODDEF(void)
output_message( j_common_ptr cinfo )
{
char buffer[JMSG_LENGTH_MAX];
/* Create the message */
(*cinfo->err->format_message) (cinfo, buffer);
/* Default OpenCV error handling instead of print */
CV_Error(CV_StsError, buffer);
}
Now apply the method to the decoder error handler:
state->cinfo.err = jpeg_std_error(&state->jerr.pub);
state->jerr.pub.error_exit = error_exit;
state->jerr.pub.output_message = output_message; /* Add this line */
Apply the method to the encoder error handler as well:
cinfo.err = jpeg_std_error(&jerr.pub);
jerr.pub.error_exit = error_exit;
jerr.pub.output_message = output_message; /* Add this line */
Recompile and install OpenCV as usual. From now on you should be able to catch libjpeg errors like any other OpenCV error. Example:
>>> cv2.imread("/var/opencv/bad_image.jpg")
OpenCV Error: Unspecified error (Corrupt JPEG data: 1137 extraneous bytes before marker 0xc4) in output_message, file /var/opencv/opencv-2.4.9/modules/highgui/src/grfmt_jpeg.cpp, line 180
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
cv2.error: /var/opencv/opencv-2.4.9/modules/highgui/src/grfmt_jpeg.cpp:180: error: (-2) Corrupt JPEG data: 1137 extraneous bytes before marker 0xc4 in function output_message
(I've submitted a pull request for the above but it got rejected because it would cause issues with people reading images without exception catching.)
Hope this helps anyone still struggling with this issue. Good luck.
It could be easier to fix the error in the file instead of trying to repair the loading function of OpenCV. If you are using Linux you can use ImageMagick to make reparation to a set of images (is usual to have it installed by default):
$ mogrify -set comment 'Image rewritten with ImageMagick' *.jpg
This command changes a property of the file leaving the image data untouched. However, the image is loaded and resaved, eliminating the extra information that causes the corruption error.
If you need more information about ImageMagick you can visit their website: http://www.imagemagick.org/script/index.php
You cannot catch it if you use imread(). However there is imdecode() function that is called by imread(). Maybe it gives you more feedback. For this you would have to load the image into memory on your own and then call the decoder.
It boils down to: You have to dig through the OpenCV sources to solve your problem.
i had to deal with this recently and found a solution over here
http://artax.karlin.mff.cuni.cz/~isa_j1am/other/opencv/
i just need to make 2 edits # $cv\modules\highgui\src\grfmt_jpeg.cpp.
--- opencv-1.0.0.orig/otherlibs/highgui/grfmt_jpeg.cpp 2006-10-16 13:02:49.000000000 +0200
+++ opencv-1.0.0/otherlibs/highgui/grfmt_jpeg.cpp 2007-08-11 09:10:28.000000000 +0200
## -181,7 +181,7 ##
m_height = cinfo->image_height;
m_iscolor = cinfo->num_components > 1;
- result = true;
+ result = (cinfo->err->num_warnings == 0);
}
}
## -405,8 +405,9 ##
icvCvt_CMYK2Gray_8u_C4C1R( buffer[0], 0, data, 0, cvSize(m_width,1) );
}
}
- result = true;
+
jpeg_finish_decompress( cinfo );
+ result = (cinfo->err->num_warnings == 0);
}
}
I am using opencv python package to read some image and also met this error message. This error can not be catch by Python. But if you want to find which image is corrupted without recompiling opencv as #Robbert suggested, you can try the following method.
First, you can pinpoint the directory where the corrupt images reside, which is fairly easy. Then you go to the directory, and use mogrify command line tool provided by ImageMagick to change the image meta info, as suggest by #goe.
mogrify -set comment "errors fixed in meta info" -format png *.jpg
The above command will convert the original jpg image to png format and also clean the original image to remove errors in meta info. When you run mogrify command, it will also output some message about which image is corrupted in the directory so that you can accurately find the corrupted image.
After that, you can do whatever you want with the original corrupted jpg image.
Any one stumbles upon this post and reads this answer.
I had to get hold of a corrupted image file.
These websites can help you corrupt your file
Corrupt a file - The file corrupter you were looking for!
CORRUPT A FILE ONLINE
Corrupt my File
First and the third website was not that much useful.
Second website is interesting as I could set the amount of file that I need to corrupt.
OpenCV version I used here is 3.4.0
I used normal cv2.imread(fileLocation)
fileLocation Location of corrupted image file
OpenCV didn't show any error message for any of the corrupted files used here
First and Third website only gave one file and both had None stored in them, when I tried to print them
Second website did let me decide the amount of file that was needed to be corrupted
Corruption% Opencv message on printing the image
4% None
10% None
25% None
50% None Corrupt JPEG data: 3 extraneous bytes before marker 0x4f
75% None Corrupt JPEG data: 153 extraneous bytes before marker 0xb2
100% Corrupt JPEG data: 330 extraneous bytes before marker 0xc6 None
I guess the only check we have to make here would be
if image is not None:
Do your code or else pop an error
You can redirect stderr to a file, then after imread, search for the string "Huffman" inside that file. After searching the file, empty it. It works for me and now I am able to discard corrupted images and just process good ones.
If you load your image with imdecode, you can check errno :
std::vector<char> datas();
//Load yout image in datas here
errno = 0;
cv::Mat mat = cv::imdecode(datas, -1);
if (errno != 0)
{
//Error
}
(tested on OpenCV 3.4.1)
I found that the issue is in libjpeg. If OpenCV uses it, it gets error
Corrupt JPEG data: 22 extraneous bytes before marker 0xd9
You can try my solution to solve it. It disables JPEG during compilation. After that OpenCV cannot read/write, but it works.
cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local -D BUILD_SHARED_LIBS=OFF -D BUILD_EXAMPLES=OFF -D BUILD_TESTS=OFF -D BUILD_PERF_TESTS=OFF -D WITH_JPEG=OFF -D WITH_IPP=OFF ..
I found an easy solution without the need to recompile openCV.
You can use imagemagick to detect the same errors, however it returns an error as expected. See the description here: https://stackoverflow.com/a/66283167/2887398