codec

I'm writing a program to save some webcam video to a file. I'm using the x264 codec found here x264 When I try writing frames to a file I get this error message poping up. x264vfw [warning]: Few frames probably would be lost. Ways to fix this: x264vfw [warning]: -if you use VirtualDub or its fork than you can enable 'VirtualDub Hack' option x264vfw [warning]: -you can enable 'File' output mode x264vfw [warning]: -you can enable 'Zero Latency' option I found this VirtualDub Hack but then I'm not using virtual dub. I'm not sure what the File output mode and zero latency mean. I think the problem

I am using new logitech camera c920 for my project to do object recognition . My camera can support H264 codec and can display H264 HD output. But How I can set CODEC type as H264 in my below code to get out put as H264 DECODED STREAM by using OpenCV instruction . I am capturing video by using below logic : ref: this link #include "opencv2/opencv.hpp" using namespace cv; int main(int, char**) { VideoCapture cap(0); // open the default camera if(!cap.isOpened()) // check if we succeeded return -1; for(;;) { Mat frame; cap >> frame; // get a new frame from camera imshow("display", frame); if

I'm looking for a simple c/c++ lib that would allow to extract the first frame of a video as a uchar array. And have a simple fonction to access the next one. I know of FFMPEG but it requiere to play with packet and things like that, and i'm surprised that nowhere on the net i can find a lib that allow something like : Video v = openVideo("path"); uchar* data = v.getFrame(); v.nextFrame(); I just need to extract frames of a video to use it as a texture...no need for reencoding after or anything... of course something that would read the most format than possible would be great, something built

I want to be able to restream the video feed of the AR Drone 2 from a Debian Server to Flash. I am aware that the AR Drone uses the codec p264. I'm totally green when it comes to video codecs, so I don't know what will be suitable for the goal I want to achieve? I have been able to stream the video feed from the AR Drone but with very high latency and extremely low quality, compared to when I directly connect to the AR Drone using ffplay. I currently use the .swf example in the standard ffserver.conf: <Stream test.swf> Feed feed1.ffm Format swf VideoFrameRate 30 VideoIntraOnly NoAudio </Stream

I have a plain ASCII file. When I try to open it with codecs.open(..., "utf-8") , I am unable to read single characters. ASCII is a subset of UTF-8, so why can't codecs open such a file in UTF-8 mode? # test.py import codecs f = codecs.open("test.py", "r", "utf-8") # ASCII is supposed to be a subset of UTF-8: # http://www.fileformat.info/info/unicode/utf8.htm assert len(f.read(1)) == 1 # OK f.readline() c = f.read(1) print len(c) print "'%s'" % c assert len(c) == 1 # fails # max% p test.py # 63 # ' # import codecs # # f = codecs.open("test.py", "r", "utf-8") # # # ASC' # Traceback (most recent

Is there a limit on the size of image that can be encoded using the image file codecs available from .NET? I'm trying to encode images > 4GB in size, but it simply does not work (or does not work properly i.e. writes out an unreadable file) with .bmp, .jpg, .png or the .tif encoders. When I lower the image size to < 2GB it does work with the .jpg but not the .bmp, .tif or .png. My next attempt would be to try libtiff because I know tiff files are meant for large images. What is a good file format for large images? or am I just hitting the file format limitations? (All of this is being done on