Java使用FFmpeg处理视频[视频直播三]
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承接上文。【拓展】
有人问我，怎么配置互联网环境的Mevan，这里拓展一下。
settings_outweb.xml
<?xml version="1.0" encoding="UTF-8"?>
<!--
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or more contributor license agreements. See the NOTICE file
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"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied. See the License for the
specific language governing permissions and limitations
under the License.
-->
<!--
| This is the configuration file for Maven. It can be specified at two levels:
|
| 1. User Level. This settings.xml file provides configuration for a single user,
| and is normally provided in ${user.home}/.m2/settings.xml.
|
| NOTE: This location can be overridden with the CLI option:
|
| -s /path/to/user/settings.xml
|
| 2. Global Level. This settings.xml file provides configuration for all Maven
| users on a machine (assuming they‘re all using the same Maven
| installation). It‘s normally provided in
| ${maven.conf}/settings.xml.
|
| NOTE: This location can be overridden with the CLI option:
|
| -gs /path/to/global/settings.xml
|
| The sections in this sample file are intended to give you a running start at
| getting the most out of your Maven installation. Where appropriate, the default
| values (values used when the setting is not specified) are provided.
|
|-->
<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
<!-- localRepository
| The path to the local repository maven will use to store artifacts.
|
| Default: ${user.home}/.m2/repository
<localRepository>/path/to/local/repo</localRepository>
-->
<!-- interactiveMode
| This will determine whether maven prompts you when it needs input. If set to false,
| maven will use a sensible default value, perhaps based on some other setting, for
| the parameter in question.
|
| Default: true
<interactiveMode>true</interactiveMode>
-->
<!-- offline
| Determines whether maven should attempt to connect to the network when executing a build.
| This will have an effect on artifact downloads, artifact deployment, and others.
|
| Default: false
<offline>false</offline>
-->
<!-- pluginGroups
| This is a list of additional group identifiers that will be searched when resolving plugins by their prefix, i.e.
| when invoking a command line like "mvn prefix:goal". Maven will automatically add the group identifiers
| "org.apache.maven.plugins" and "org.codehaus.mojo" if these are not already contained in the list.
|-->
<pluginGroups>
<!-- pluginGroup
| Specifies a further group identifier to use for plugin lookup.
<pluginGroup>com.your.plugins</pluginGroup>
-->
</pluginGroups>
<!-- proxies
| This is a list of proxies which can be used on this machine to connect to the network.
| Unless otherwise specified (by system property or command-line switch), the first proxy
| specification in this list marked as active will be used.
|-->
<proxies>
<!-- proxy
| Specification for one proxy, to be used in connecting to the network.
|
<proxy>
<id>optional</id>
<active>true</active>
<protocol>http</protocol>
<username>proxyuser</username>
<password>proxypass</password>
<host>proxy.host.net</host>
<port>80</port>
<nonProxyHosts>local.net|some.host.com</nonProxyHosts>
</proxy>
-->
</proxies>
<!-- servers
| This is a list of authentication profiles, keyed by the server-id used within the system.
| Authentication profiles can be used whenever maven must make a connection to a remote server.
|-->
<servers>
<!-- server
| Specifies the authentication information to use when connecting to a particular server, identified by
| a unique name within the system (referred to by the ‘id‘ attribute below).
|
| NOTE: You should either specify username/password OR privateKey/passphrase, since these pairings are
| used together.
|
<server>
<id>deploymentRepo</id>
<username>repouser</username>
<password>repopwd</password>
</server>
-->
<!-- Another sample, using keys to authenticate.
<server>
<id>siteServer</id>
<privateKey>/path/to/private/key</privateKey>
<passphrase>optional; leave empty if not used.</passphrase>
</server>
-->
</servers>
<!-- mirrors
| This is a list of mirrors to be used in downloading artifacts from remote repositories.
|
| It works like this: a POM may declare a repository to use in resolving certain artifacts.
| However, this repository may have problems with heavy traffic at times, so people have mirrored
| it to several places.
|
| That repository definition will have a unique id, so we can create a mirror reference for that
| repository, to be used as an alternate download site. The mirror site will be the preferred
| server for that repository.
|-->
<mirrors>
<!-- mirror
| Specifies a repository mirror site to use instead of a given repository. The repository that
| this mirror serves has an ID that matches the mirrorOf element of this mirror. IDs are used
| for inheritance and direct lookup purposes, and must be unique across the set of mirrors.
|
<mirror>
<id>mirrorId</id>
<mirrorOf>repositoryId</mirrorOf>
<name>Human Readable Name for this Mirror.</name>
<url>http://my.repository.com/repo/path</url>
</mirror>
-->
</mirrors>
<!-- profiles
| This is a list of profiles which can be activated in a variety of ways, and which can modify
| the build process. Profiles provided in the settings.xml are intended to provide local machine-
| specific paths and repository locations which allow the build to work in the local environment.
|
| For example, if you have an integration testing plugin - like cactus - that needs to know where
| your Tomcat instance is installed, you can provide a variable here such that the variable is
| dereferenced during the build process to configure the cactus plugin.
|
| As noted above, profiles can be activated in a variety of ways. One way - the activeProfiles
| section of this document (settings.xml) - will be discussed later. Another way essentially
| relies on the detection of a system property, either matching a particular value for the property,
| or merely testing its existence. Profiles can also be activated by JDK version prefix, where a
| value of ‘1.4‘ might activate a profile when the build is executed on a JDK version of ‘1.4.2_07‘.
| Finally, the list of active profiles can be specified directly from the command line.
|
| NOTE: For profiles defined in the settings.xml, you are restricted to specifying only artifact
| repositories, plugin repositories, and free-form properties to be used as configuration
| variables for plugins in the POM.
|
|-->
<profiles>
<!-- profile
| Specifies a set of introductions to the build process, to be activated using one or more of the
| mechanisms described above. For inheritance purposes, and to activate profiles via <activatedProfiles/>
| or the command line, profiles have to have an ID that is unique.
|
| An encouraged best practice for profile identification is to use a consistent naming convention
| for profiles, such as ‘env-dev‘, ‘env-test‘, ‘env-production‘, ‘user-jdcasey‘, ‘user-brett‘, etc.
| This will make it more intuitive to understand what the set of introduced profiles is attempting
| to accomplish, particularly when you only have a list of profile id‘s for debug.
|
| This profile example uses the JDK version to trigger activation, and provides a JDK-specific repo.
<profile>
<id>jdk-1.4</id>
<activation>
<jdk>1.4</jdk>
</activation>
<repositories>
<repository>
<id>jdk14</id>
<name>Repository for JDK 1.4 builds</name>
<url>http://www.myhost.com/maven/jdk14</url>
<layout>default</layout>
<snapshotPolicy>always</snapshotPolicy>
</repository>
</repositories>
</profile>
-->
<!--
| Here is another profile, activated by the system property ‘target-env‘ with a value of ‘dev‘,
| which provides a specific path to the Tomcat instance. To use this, your plugin configuration
| might hypothetically look like:
|
| ...
| <plugin>
| <groupId>org.myco.myplugins</groupId>
| <artifactId>myplugin</artifactId>
|
| <configuration>
| <tomcatLocation>${tomcatPath}</tomcatLocation>
| </configuration>
| </plugin>
| ...
|
| NOTE: If you just wanted to inject this configuration whenever someone set ‘target-env‘ to
| anything, you could just leave off the <value/> inside the activation-property.
|
<profile>
<id>env-dev</id>
<activation>
<property>
<name>target-env</name>
<value>dev</value>
</property>
</activation>
<properties>
<tomcatPath>/path/to/tomcat/instance</tomcatPath>
</properties>
</profile>
-->
</profiles>
<!-- activeProfiles
| List of profiles that are active for all builds.
|
<activeProfiles>
<activeProfile>alwaysActiveProfile</activeProfile>
<activeProfile>anotherAlwaysActiveProfile</activeProfile>
</activeProfiles>
-->
</settings>继续正题，上篇咱们讲到 使用命令可以完成一系列的操作
1、视频格式转换：ffmpeg -i 123.mp4 newVideo.avi
**2、视频分段：ffmpeg -i 80s.mp4 -c:v libx264 -c:a aac -strict -2 -f hls -hls_list_size 0 -hls_time 60 output/output.m3u8
**3、音视频合并：ffmpeg -i test2.mp3 -i test1.mp4 -t 10 -y newVideo.mp4
等等，详见官方文档
《英文版的哦》
其实，这里只是做了一点，使用Java执行上述命令。
【ffmpeg与Java实现视频转换小demo】
package com.example.demo;
import org.assertj.core.util.Lists;
import org.junit.Test;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.List;
public class MediaUtil {
/**
* 简易视频处理 -- （cmd(windows): ffmpeg.exe -i test1.mp4 newVideo.avi）
*
* @param ffmpegPath ffmpeg.exe文件路径，可在rest或者admin中进行配置，使用配置文件进行读取
* @param videoInputPath 视频文件路径（输入）
* @param videoOutputPath 转换完成的文件路径（输出）
* @throws Exception
*/
public static void videoConvert(String ffmpegPath, String videoInputPath, String videoOutputPath) throws Exception {
// 构建命令
List<String> command = Lists.newArrayList();
command.add(ffmpegPath);
command.add("-i");
command.add(videoInputPath);
command.add(videoOutputPath);
// 执行操作
ProcessBuilder builder = new ProcessBuilder(command);
Process process = builder.start();
InputStream errorStream = process.getErrorStream();
InputStreamReader isr = new InputStreamReader(errorStream);
BufferedReader br = new BufferedReader(isr);
String line = "";
while ((line = br.readLine()) != null) {
}
if (br != null) {
br.close();
}
if (isr != null) {
isr.close();
}
if (errorStream != null) {
errorStream.close();
}
}
@Test
public void testVideoConvert() {
String ffmpegPath = "ffmpeg";
String videoInputPath = "D:Frozenfrozen_nbvideo
ealvideo123.mp4";
String videoOutputPath = "D:Frozenfrozen_nbvideo
ealvideo
ewVideo.avi";
//fmpegProperties ffmpegProperties = SpringContextHolder.getBean(FfmpegProperties.class);
//ffmpegProperties.getFfmpegFile()
try {
videoConvert(ffmpegPath, videoInputPath, videoOutputPath);
} catch (Exception e) {
e.printStackTrace();
}
}
}
漫长的等待其转换完成......
5分多钟，视频终于转换完成了
播放正常
其他未详尽事宜，参见：《FFmpeg基本语法》
【再来一个小demo】
/**
* 获取第一秒第一帧的缩略图 -- （cmd(windows): ffmpeg.exe -ss 00:00:01 -y -i test1.mp4 -vframes 1 new.jpg）
*
* @param ffmpegPath ffmpeg.exe文件路径，可在rest或者admin中进行配置，使用配置文件进行读取
* @param videoInputPath 视频文件路径（输入）
* @param coverOutputPath 缩略图输出路径
* @throws Exception
*/
public static void getVideoCover(String ffmpegPath, String videoInputPath, String coverOutputPath) throws Exception {
// 构建命令
List<String> command = Lists.newArrayList();
command.add(ffmpegPath);
command.add("-ss");
command.add("00:45:22");
command.add("-y");
command.add("-i");
command.add(videoInputPath);
command.add("-vframes");
command.add("1");
command.add(coverOutputPath);
// 执行操作
ProcessBuilder builder = new ProcessBuilder(command);
Process process = builder.start();
InputStream errorStream = process.getErrorStream();
InputStreamReader isr = new InputStreamReader(errorStream);
BufferedReader br = new BufferedReader(isr);
String line = "";
while ((line = br.readLine()) != null) {
}
if (br != null) {
br.close();
}
if (isr != null) {
isr.close();
}
if (errorStream != null) {
errorStream.close();
}
}
@Test
public void testGetVideoCover() {
String videoInputPath = "D:Frozenfrozen_nbvideo
ealvideo123.mp4";
String videoOutputPath = "D:Frozenfrozen_nbvideo
ealvideofrozen.jpg";
try {
getVideoCover("ffmpeg", videoInputPath, videoOutputPath);
} catch (Exception e) {
e.printStackTrace();
}
}
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