除了这个命令(合并)，Ffmpeg在Java中的大部分时间都工作得很好，这个命令直接在终端中工作得很好

Question

当我从命令行运行这个时，它工作了(合并两个视频并排):

/usr/local/bin/ffmpeg -i /Users/ron/Dropbox/JAMR/Technology/workspace/JAMR/sandbox/test.mov -i /Users/ron/Dropbox/JAMR/Technology/workspace/JAMR/sandbox/test1.mov -filter_complex "[0:v:0]pad=iw*2:ih[bg]; [bg][1:v:0]overlay=w" /Users/ron/Dropbox/JAMR/Technology/workspace/JAMR/sandbox/merged.mov

然而，当我在java中运行它时，我从控制台得到以下内容:

[AVFilterGraph @ 0x7fd44ad00440] No such filter: '"'
Error configuring filters.

这里是我返回的文本(直接复制)，这是我发送要执行的内容。它完全相同，只是我在引号符号之前使用了转义字符，所以"变成了":

"/usr/local/bin/ffmpeg -i /Users/ron/Dropbox/JAMR/Technology/workspace/JAMR/sandbox/test.mov -i /Users/ron/Dropbox/JAMR/Technology/workspace/JAMR/sandbox/test1.mov -filter_complex "[0:v:0]pad=iw*2:ih[bg]; [bg][1:v:0]overlay=w" /Users/ron/Dropbox/JAMR/Technology/workspace/JAMR/sandbox/merged.mov";

所有其他ffmpeg测试都成功了，除了这个....(唯一一个我使用"字符)

有人能弄明白吗?

Answer 1

您应该将Java中的命令拆分为字符串数组，然后将其传递给getRuntime().exec(String[])

短的例子:

String cmd[] = new String[]{
                "ffmpeg",
                "-r", String.valueOf(20/30f), 
                "-i", "assets/IMAG0054_BURST%03d.jpg",
                "-i","assets/logo.png",
                "-i","assets/guitar_tuning.wav","-r", "24", "-codec:a", "mp3",
                "-filter_complex","[0:v][1:v]overlay=main_w-overlay_w-10:main_h-overlay_h-10,"+
                "drawtext=fontfile=assets/OpenSans-Regular.ttf:text=1st scene:x=0:y=0:fontsize=100:fontcolor=white:enable='between(t,0.5,2.5)'," +
                "drawtext=enable='between(t,2.6,5.5)':fontfile=assets/OpenSans-Regular.ttf:text=2nd scene:x=0:y=0:fontsize=100:fontcolor=white," +
                "drawtext=enable='between(t,5.6,8.8)':fontfile=assets/OpenSans-Regular.ttf:text=3rd scene:x=0:y=0:fontsize=100:fontcolor=white," +
                "drawtext=enable='between(t,8.9,30)':fontfile=assets/OpenSans-Regular.ttf:text=4rd scene:x=0:y=0:fontsize=100:fontcolor=white" +
                "[out]",
                "-map", "[out]", "-map", "2:0",
                "-acodec","mp3",
                //"-shortest " +
                "simple_lapse.mp4"};
Process ffmpeg = Runtime.getRuntime().exec(cmd);

希望有所帮助