ffmpeg命令行编码byte[]并返回编码后的byte[]
时间: 2023-10-24 20:05:38 浏览: 131
要使用FFmpeg命令行将字节数组编码并返回编码后的字节数组,你可以使用以下步骤:
1. 将字节数组写入临时文件
```java
File tempFile = File.createTempFile("ffmpeg", "input");
FileOutputStream fos = new FileOutputStream(tempFile);
fos.write(inputBytes);
fos.close();
```
2. 使用FFmpeg命令行对临时文件进行编码
```java
String cmd = "ffmpeg -i " + tempFile.getAbsolutePath() + " -c:v libx264 -preset ultrafast -c:a aac -f mpegts -";
Process process = Runtime.getRuntime().exec(cmd);
```
这个命令行将输入文件编码为MPEG-TS格式的视频和音频流,并将其输出到标准输出流。
3. 从标准输出流中读取编码后的字节数组
```java
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
InputStream inputStream = process.getInputStream();
byte[] buffer = new byte[1024];
int length;
while ((length = inputStream.read(buffer)) != -1) {
outputStream.write(buffer, 0, length);
}
byte[] outputBytes = outputStream.toByteArray();
```
4. 删除临时文件
```java
tempFile.delete();
```
完整代码如下:
```java
public static byte[] encodeByteArray(byte[] inputBytes) throws IOException {
File tempFile = File.createTempFile("ffmpeg", "input");
FileOutputStream fos = new FileOutputStream(tempFile);
fos.write(inputBytes);
fos.close();
String cmd = "ffmpeg -i " + tempFile.getAbsolutePath() + " -c:v libx264 -preset ultrafast -c:a aac -f mpegts -";
Process process = Runtime.getRuntime().exec(cmd);
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
InputStream inputStream = process.getInputStream();
byte[] buffer = new byte[1024];
int length;
while ((length = inputStream.read(buffer)) != -1) {
outputStream.write(buffer, 0, length);
}
byte[] outputBytes = outputStream.toByteArray();
tempFile.delete();
return outputBytes;
}
```
请注意,这只是一个简单的示例,你需要根据你的具体要求修改FFmpeg命令行和编码参数。
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