Linux安装ilbc库
时间: 2023-11-30 22:43:26 浏览: 73
为了在Linux上安装ilbc库,可以按照以下步骤进行操作:
1.首先,需要从ilbc官方网站下载ilbc库的源代码。
2.解压缩下载的源代码文件。
3.打开终端,进入解压后的源代码目录。
4.输入以下命令进行编译和安装:
```shell
./configure
make
make install
```
5.等待编译和安装完成后,就可以在Linux系统中使用ilbc库了。
相关问题
iLBC decode
iLBC (internet Low Bitrate Codec) is a speech codec used for encoding and decoding speech signals. To decode an iLBC-encoded audio file, you can use a decoder library or tool that supports iLBC decoding.
Here is an example of how you can decode an iLBC file using the libilbc library in C:
1. Install the libilbc library on your system.
2. Include the necessary header files in your C code:
```c
#include <stdio.h>
#include <stdlib.h>
#include <ilbc/ilbc.h>
```
3. Write a function to perform the iLBC decoding:
```c
void ilbc_decode(const char* input_file, const char* output_file) {
FILE* fin = fopen(input_file, "rb");
FILE* fout = fopen(output_file, "wb");
// Get input file size
fseek(fin, 0, SEEK_END);
long input_size = ftell(fin);
rewind(fin);
// Allocate memory for input and output buffers
int16_t* input_buffer = (int16_t*)malloc(input_size);
int16_t* output_buffer = (int16_t*)malloc(input_size * 2); // Double the size for stereo audio
// Read the input file into the input buffer
fread(input_buffer, sizeof(int16_t), input_size / sizeof(int16_t), fin);
// Create an iLBC decoder instance
iLBC_Dec_Inst_t* dec_inst = iLBC_create(1); // 1 for 20ms frame size
// Perform the decoding
int num_frames = input_size / (2 * sizeof(int16_t)); // Assuming mono audio, 2 bytes per sample
iLBC_decode(dec_inst, input_buffer, num_frames, output_buffer);
// Write the decoded audio to the output file
fwrite(output_buffer, sizeof(int16_t), num_frames * sizeof(int16_t), fout);
// Cleanup
fclose(fin);
fclose(fout);
free(input_buffer);
free(output_buffer);
iLBC_free(dec_inst);
}
```
4. Call the `ilbc_decode` function with the input and output file paths:
```c
int main() {
const char* input_file = "encoded.ilbc";
const char* output_file = "decoded.pcm"; ilbc_decode(input_file, output_file);
return 0;
}
```
Make sure to replace "encoded.ilbc" with the path to your iLBC-encoded file and "decoded.pcm" with the desired output file path. After running the program, you should have the decoded audio in the output file.
Please note that this is just a basic example, and you may need to modify it according to your specific requirements and the iLBC decoder library you are using.
React Native WebRTC 改变编码
React Native WebRTC 中可以通过修改 `videoType` 和 `audioType` 参数来改变编码格式。
- `videoType` 参数用于设置本地视频流的编码格式,可以设置为 `"VP8"` 或 `"H264"`。默认值为 `"VP8"`。
- `audioType` 参数用于设置本地音频流的编码格式,可以设置为 `"opus"` 或 `"iLBC"`。默认值为 `"opus"`。
在创建本地媒体流对象时,可以通过传递这两个参数来设置编码格式,例如:
```javascript
const mediaStream = await getUserMedia({
audio: true,
video: {
mandatory: {
minWidth: 640,
minHeight: 360,
minFrameRate: 15,
},
facingMode: 'user',
optional: [
{ videoType: 'H264' },
{ audioType: 'iLBC' },
],
},
});
```
该代码中的 `optional` 属性用于设置可选参数,其中包括设置编码格式的 `videoType` 和 `audioType`。在这个例子中,视频使用了 H264 编码,而音频使用了 iLBC 编码。