I am trying to encode mp4 video, but it doesn’t open on my macbook because while it has the supported H264 codec, the container format is not MP4. So all I ask is how you would go about specifying the container format so I can generate video that is actually playable without using ffplay. ffprobe ..
Category : encode
I record audio using wasapi. And get BYTE array. Capture samples made by: DWORD AudioCapture::RecordAudio() { HRESULT hr; hr = CoInitializeEx(NULL, COINIT_MULTITHREADED); Sleep(hnsActualDuration / REFTIMES_PER_MILLISEC / 2); hr = pCaptureClient->GetNextPacketSize(&packetLength); if (FAILED(hr)) { printf("Faild to get next data packet sizen"); return hr; } while (packetLength != 0) { hr = pCaptureClient->GetBuffer(&pData, &numFramesAvailable, &flags, NULL, NULL); ..
I get samples with wasapi as BYTE *. Then I want to write them to a file using FFmpeg. I get samples like this: DWORD AudioCapture::recordAudio() { HRESULT hr; hr = CoInitializeEx(NULL, COINIT_MULTITHREADED); Sleep(hnsActualDuration / REFTIMES_PER_MILLISEC / 2); hr = pCaptureClient->GetNextPacketSize(&packetLength); if (FAILED(hr)) { printf("Faild to get next data packet sizen"); return hr; } while ..
I have to encode and decode a string "Anum Aamir" using fixed encoding technique that uses fixed no. of bits. As for my string, it should do : A: 000, n: 001, u: 010, m: 011, space: 100, a: 101, i: 110, r: 111 The issue I am facing is that when i call showCode() ..
I am trying to encode KLV metadata (MISB 0601) with a regular video stream. I am using the ffmpeg examples and hove come up with this to start a klv stream: int Streamer::add_klv_stream(){ this->klv_stream = avformat_new_stream(this->output_context, NULL); this->klv_stream->codec->codec_type = AVMEDIA_TYPE_DATA; this->klv_stream->codec->codec_id = AV_CODEC_ID_SMPTE_KLV; this->klv_stream->codec->codec_tag = 1096174667; //some magic number? this->klv_stream->time_base = AVRational{ 1, 30 }; ..
I’m trying to provide a live section of my screen on Windows to feed to my LEDs. This below commmand generates a very simple 16×16 pixel RGB raw video file. So raw output is 768 bytes per frame (16x16x3). I have a php script that reads the file which then adds some headers along with ..
hw1.cpp char * hwidmgr::HhhHHh() { std::string str = ""; str = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; return "WSAStart"; } Base64.h #ifndef _MACARON_BASE64_H_ #define _MACARON_BASE64_H_ #include <string> namespace macaron { class Base64 { public: static std::string Encode(const std::string data) { static constexpr char sEncodingTable[] = { ‘A’, ‘B’, ‘C’, ‘D’, ‘E’, ‘F’, ‘G’, ‘H’, ‘I’, ‘J’, ‘K’, ‘L’, ‘M’, ‘N’, ..
I am reading "Computer Systems: A Programmer’s Perspective". Topic: stages of compilation in C Preprocessing phase, Compilation phase, Assembly phase and Linker phase. In Assembly phase this line "This file (the object file) is a binary file containing 17 bytes to encode the instructions for function main." I can’t understand what the "17 bytes to ..
For exmaple, nal_ref_idc and profile_idc. I knew what they are, but I can not find the idc‘s full name. Source: Windows Que..
I’m trying to encode and then decode CERT_AUTHORITY_KEY_ID_INFO structure. But I’m getting an error and I couldn’t find an example online. How to do the round trip properly? CERT_AUTHORITY_KEY_ID_INFO info; info.KeyId.cbData = 10; info.KeyId.pbData = new BYTE[10]{ 1,2,3,4,5,1,2,3,4,5 }; info.CertIssuer.cbData = 10; info.CertIssuer.pbData = new BYTE[10]{ 2,4,6,8,10,2,4,6,8,10 }; info.CertSerialNumber.cbData = 10; info.CertSerialNumber.pbData = new BYTE[10]{ ..
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