Question

我希望在将视频发送到服务器之前压缩或更改视频的分辨率，但我不想花太长时间。例如，对于以下代码，大小为100MB的视频需要2-3分钟才能将其大小调整为10MB。我能否在不损失太多质量的情况下更快地完成任务？

#!/bin/bash

set -e
set -x

rm -rf ./build
mkdir ./build

rm -rf ./bin/
mkdir ./bin/

g++ \
  -o ./bin/myprog \
  ./src/cpp/myprog.c \
  -L/cygdrive/c/Program\ Files/Java/jdk1.8.0_131/jre/bin/server/ \
  -ljvm \
  -Isrc/cpp \
  -I/cygdrive/c/Program\ Files/Java/jdk1.8.0_131/include \
  -I/cygdrive/c/Program\ Files/Java/jdk1.8.0_131/include/win32

/cygdrive/c/Program\ Files/Java/jdk1.8.0_131/bin/javac \
  -Xlint:all \
  -Werror \
  -g \
  -verbose \
  -cp ./build \
  -sourcepath ./src/java \
  -d ./build \
  ./src/java/myPackage/MyClass.java

/cygdrive/c/Program\ Files/Java/jdk1.8.0_131/bin/jar \
  cvf ./bin/myPackage.jar \
  -C ./build \
  myPackage/MyClass.class

/cygdrive/c/Program\ Files/Java/jdk1.8.0_131/bin/jar tf ./bin/myPackage.jar

cd ./bin
PATH=/cygdrive/c/Program\ Files/Java/jdk1.8.0_131/jre/bin/server/:/cygdrive/c/Program\ Files/Java/jdk1.8.0_131/bin/:$PATH ./myprog

上述命令的控制台输出：

             String[] command = {"-i", filePath, "-vf", "scale=640:360", "-c:a", "copy", "-preset", "ultrafast", dest.getAbsolutePath()};

如何使用FFmpeg快速压缩或更改视频的分辨率？

0 个答案: