如何通过Java实现修改视频分辨率

Z时代
2024-01-10
分类：IT

前言

本文提供可以调整视频分辨率的java代码，实用主义的狂欢。

环境依赖

添加需要的maven依赖。


        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.7.15</version>
        </dependency>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>31.0.1-jre</version>
        </dependency>
        <dependency>
            <groupId>org.bytedeco</groupId>
            <artifactId>javacv-platform</artifactId>
            <version>1.5.5</version>
        </dependency>

代码

不废话了。


package com.huyi.csdn.tools;
import cn.hutool.core.util.IdUtil;
import com.google.common.base.Joiner;
import com.google.common.base.Splitter;
import org.bytedeco.javacpp.Loader;
import java.io.File;
import java.text.MessageFormat;
import java.util.Arrays;
import java.util.List;
/**
 * @Program: csdn @ClassName: ModifyVideoResolution @Author: 剑客阿良_ALiang @Date: 2021-12-12
 * 14:48 @Description: 修改视频分辨率 @Version: V1.0
 */
public class ModifyVideoResolution {
  /**
   * 修改视频分辨率
   *
   * @param imagePath 原视频地址
   * @param outputDir 输出目录
   * @param width 宽度
   * @param height 高度
   * @param bitRate 码率
   * @return 视频地址
   * @throws Exception 异常
   */
  public static String modifyResolution(
      String imagePath, String outputDir, Integer width, Integer height, Integer bitRate)
      throws Exception {
    if (bitRate == null) {
      bitRate = 2000;
    }
    List<String> paths = Splitter.on(".").splitToList(imagePath);
    String ext = paths.get(paths.size() - 1);
    if (!Arrays.asList("mp4").contains(ext)) {
      throw new Exception("format error");
    }
    String resultPath =
        Joiner.on(File.separator).join(Arrays.asList(outputDir, IdUtil.simpleUUID() + "." + ext));
    String ffmpeg = Loader.load(org.bytedeco.ffmpeg.ffmpeg.class);
    ProcessBuilder builder =
        new ProcessBuilder(
            ffmpeg,
            "-i",
            imagePath,
            "-s",
            MessageFormat.format("{0}*{1}", String.valueOf(width), String.valueOf(height)),
            "-b",
            MessageFormat.format("{0}k", String.valueOf(bitRate)),
            resultPath);
    builder.inheritIO().start().waitFor();
    return resultPath;
  }
}

代码说明：

1、modifyResolution方法入参分别为：原视频地址、输出目录、需要调整的宽度、高度、码率（码率为null，默认使用2000）。

2、格式校验只校验了mp4，可自行添加。

3、文件名为了避免重复，使用uuid作为文件名。

验证一下

准备的视频如下：

验证代码：


  public static void main(String[] args) throws Exception {
    System.out.println(
        modifyResolution("C:/Users/yi/Desktop/981.mp4", "C:/Users/yi/Desktop", 960, 540, null));
  }

执行结果：

E:\Java\jdk1.8.0_40\bin\java.exe "-javaagent:E:\Program Files\JetBrains\IntelliJ IDEA 2020.1.1\lib\idea_rt.jar=13771:E:\Program Files\JetBrains\IntelliJ IDEA 2020.1.1\bin" -Dfile.encoding=UTF-8 -classpath 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com.huyi.csdn.tools.ModifyVideoResolution

built with gcc 10.2.0 (Rev5, Built by MSYS2 project)

configuration: --prefix=.. --disable-iconv --disable-opencl --disable-sdl2 --disable-bzlib --disable-lzma --disable-linux-perf --enable-shared --enable-version3 --enable-runtime-cpudetect --enable-zlib --enable-libmp3lame --enable-libspeex --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-openssl --enable-libopenh264 --enable-libvpx --enable-libfreetype --enable-libopus --enable-cuda --enable-cuvid --enable-nvenc --enable-libmfx --enable-w32threads --enable-indev=dshow --target-os=mingw32 --cc='gcc -m64' --extra-cflags=-I../include/ --extra-ldflags=-L../lib/ --extra-libs='-static-libgcc -static-libstdc++ -Wl,-Bstatic -lstdc++ -lgcc_eh -lWs2_32 -lcrypt32 -lpthread -lz -lm -Wl,-Bdynamic -lole32 -luuid'

libavutil 56. 51.100 / 56. 51.100

libavcodec 58. 91.100 / 58. 91.100

libavformat 58. 45.100 / 58. 45.100

libavdevice 58. 10.100 / 58. 10.100

libavfilter 7. 85.100 / 7. 85.100

libswscale 5. 7.100 / 5. 7.100

libswresample 3. 7.100 / 3. 7.100

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:/Users/yi/Desktop/981.mp4':

Metadata:

major_brand : isom

minor_version : 512

compatible_brands: isomiso2avc1mp41

title : ��ɱ�ֲ�̫��(��ݼ��).Leon.1994.Directors.Cut.720p.Bluray

encoder : Lavf58.45.100

description : This File is Created by Easy RealMedia Tools@!

keywords : Ӱ�ӵ۹��Ʒ

Duration: 00:00:05.64, start: 0.000000, bitrate: 1017 kb/s

Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x688, 881 kb/s, 23.98 fps, 23.98 tbr, 785647.00 tbn, 47.95 tbc (default)

Metadata:

handler_name : VideoHandler

Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)

Metadata:

handler_name : SoundHandler

Please use -b:a or -b:v, -b is ambiguous

Stream mapping:

Stream #0:0 -> #0:0 (h264 (native) -> mpeg4 (native))

Stream #0:1 -> #0:1 (aac (native) -> aac (native))

Press [q] to stop, [?] for help

Output #0, mp4, to 'C:/Users/yi/Desktop\30e95d9dff5941c09ec837d4ce518f5d.mp4':

Metadata:

major_brand : isom

minor_version : 512

compatible_brands: isomiso2avc1mp41

title : ��ɱ�ֲ�̫��(��ݼ��).Leon.1994.Directors.Cut.720p.Bluray

keywords : Ӱ�ӵ۹��Ʒ

description : This File is Created by Easy RealMedia Tools@!

encoder : Lavf58.45.100

Stream #0:0(und): Video: mpeg4 (mp4v / 0x7634706D), yuv420p, 960x540, q=2-31, 2000 kb/s, 23.98 fps, 35029 tbn, 23.98 tbc (default)

Metadata:

handler_name : VideoHandler

encoder : Lavc58.91.100 mpeg4

Side data:

cpb: bitrate max/min/avg: 0/0/2000000 buffer size: 0 vbv_delay: N/A

Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)

Metadata:

handler_name : SoundHandler

encoder : Lavc58.91.100 aac

frame= 122 fps=0.0 q=3.9 Lsize= 1563kB time=00:00:05.04 bitrate=2537.0kbits/s speed=11.5x

video:1479kB audio:79kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.356479%

[aac @ 000001c18c44bf80] Qavg: 180.360

C:/Users/yi/Desktop\30e95d9dff5941c09ec837d4ce518f5d.mp4

Process finished with exit code 0

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如何通过Java实现修改视频分辨率

目录

前言

环境依赖

代码

验证一下

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