codec

This is a follow-up question from my previous question asked here , where I needed to look for silence within a specific audio track. Here is the ffmpeg life-saver solution where helps to get some metadata: ffmpeg -i file -map 0:a:1 -af astats -f null - But I have other type of input .mp4 files where they have one single track of 8 (i.e. 7.1) audio channels. Apparently these files are transcoded from an original file (somehow the 4 track stereos are squished into these files). Now similar to my previous, I need to know if the original file was 2-channel stereo or 5.1 (6) channel. How to know

I coded the below which tries to hold a picture and count number hundred and finally grab all them to a video with following codec MP42(MPEG4-V2) #include <stdAfx.h> #include <iostream> #include <opencv2\opencv.hpp> using namespace cv; using namespace std; int n=0; char a; int main(int, char** argv) { Mat image= imread("C:\\Users\\Metin\\Desktop\\images.jpg"); Mat newimage; VideoWriter vide ("Hopdedik.avi",CV_FOURCC('M','P','4','2'),30.0,image.size()); vide.open("Hopdedik.avi",CV_FOURCC('M','P','4','2'),30.0,image.size()); for(int n=0; n<100;n++){ cout<<n<<'\n'; std::string s= to_string(static

I have to add a custom video codec to Android that pulls in a video stream that contains metadata such as location, time, and graphic and textual annotations. The information must be demuxed and then presented as a video with annotation overlays and also as a map (e.g. Google map) with annotations. How can this be done? I'm interested in any information, links, etc. that will get me closer. There appears to be good suggestions in this question: http://groups.google.com/group/android-porting/browse_thread/thread/4b961fe43cb29b18 This may be more work than you are looking for, and may be more

I'm willing to migrate my code from mongojack to something that supports the new async mongo driver. Yet I find that the new way of encoding/decoding is through Codec s and I don't see myself writing a Codec for every class in my model. That's why I'd rather write a lib that given a class creates a Codec . However I don't know how, nor do I know if there's already some effort out there trying to achieve the same. Are there some libs that achieve what I want? if not, what's the best approach to achieve it. (I know I should probably use CodecProvider somewhere in there, but I still don't know

I'm messed up with codec issue for days, and still couldn't see the big picture yet. It is my first time to deal with audio/video formats and codecs. So I really need some help about that. Here is the work. I'm writing several components that is responsible for encoding and decoding customized mpeg files. On top of standart de/compression process (for both audio and video) i will implement some custom de/encryption. Writing both codec and software libraries for this. Things i can't figure out are listed. For WMP, what is the codec locating policy. How do I differantiate my custom file format

I'm trying to decode h264 nals in real time with android low level media api. Each nal contains one full frame, so i expect that after feeding input with my nal and calling dequeueOutputBuffer it would "immediatly" (with the litle delay of course) display my frame but it doesn't. I see the first frame and the dequeue returns the first buffer only afer feeding the decoder with the second one which at this time should render the second frame. Frames are encoded with zerolatency preset of x264 so no b-frame etc... I guess that there might be a way to set the encoder to render the frame immediatly

I want to write .flv file from Opencv and spent so much time on it... OpenCv 2.3 Documentation says we can create flv file with this codec CV_FOURCC('F','L','V','1') but I am always getting this error . [flv @ 0x9bf5000] Tag FLV1/0x31564c46 incompatible with output codec id '22' Please help.... Currently I am using OpenCv 2.3 on Ubuntu 10.10 I know this is quite old, but I'll add my experience to this wall incase future people have this problem. I encountered this using the PIM1 fourCC for output - my problem was solved when I changed from video_output = cvCreateVideoWriter("disparity_output

I am developing a voice application, I have 2 options speex and nellymoser .Why should I use speex instead of nellymoser in flex application. this should make it clear , Comparison of both codecs for flex: http://askmeflash.com/article/2/speex-vs-nellymoser Speex is open source, optimized for speech and seems to have lower bandwidth requirements. However, in Flash/AIR, Speex is always 16 kHz, which is not quite the Skype-like crispness of the sound. Because of that, we're currently contemplating switching to the "old" Nellymoser where we have an option of 22 and even 44 kHz. 来源： https:/