在Android应用

Question

在学习本教程时：https://github.com/cine-io/android-ffmpeg-with-rtmp并且在Ubuntu 14.04 64位中成功编译后，在尝试执行ffmpeg时出现IOException：

String abspath = getApplicationInfo().nativeLibraryDir;

        // Change the permissions
        try {
            Runtime.getRuntime().exec("chmod -R 777 "+ abspath).waitFor();
        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        String cameraPath = "/storage/emulated/0/DCIM/Camera/";
        String cmd = "ffmpeg -i "+ cameraPath + "VID_20150728_150045662.mp4 -y "+ cameraPath + "output.mp4";

        ProcessBuilder processBuilder = new ProcessBuilder(cmd);

        final Map<String, String> environment = processBuilder.environment();

        environment.put("LD_LIBRARY_PATH", getDir("lib", 0).getAbsolutePath());

        try {
            Process process = processBuilder.start();
        } catch (IOException e) {
            e.printStackTrace();
        }

IOException是：

  

运行exec（）时出错。命令：[ffmpeg -i   /storage/emulated/0/DCIM/Camera/VID_20150728_150045662.mp4 -y   /storage/emulated/0/DCIM/Camera/output.mp4]工作目录：null   环境：[ANDROID_ROOT = / system，   EMULATED_STORAGE_SOURCE = / mnt / shell / emulated，LOOP_MOUNTPOINT = / mnt / obb，   EMULATED_STORAGE_TARGET = / storage / emulated，ANDROID_BOOTLOGO = 1，   LD_LIBRARY_PATH = /数据/数据/ douglasanunciacao.ndksample / app_lib，   EXTERNAL_STORAGE = / storage / emulated / legacy，ANDROID_SOCKET_zygote = 11，   ANDROID_DATA = /数据，   PATH = / sbin目录：/供应商/ bin中：/系统/ sbin目录：/系统/ bin中：/系统/ XBIN，   ANDROID_ASSETS = / system / app，ASEC_MOUNTPOINT = / mnt / asec，   BOOTCLASSPATH = /系统/框架/ core.jar添加：/system/framework/conscrypt.jar：/system/framework/okhttp.jar：/system/framework/core-junit.jar：/system/framework/bouncycastle.jar：/系统/框架/ ext.jar：/system/framework/framework.jar：/system/framework/framework2.jar：/system/framework/telephony-common.jar：/system/framework/voip-common.jar：/系统/framework/mms-common.jar:/system/framework/android.policy.jar:/system/framework/services.jar:/system/framework/apache-xml.jar:/system/framework/webviewchromium.jar:/系统/框架/电话-msim.jar：/system/framework/oem-services.jar：/system/framework/qcmediaplayer.jar，   ANDROID_PROPERTY_WORKSPACE = 9,0，ANDROID_STORAGE = / storage]

有谁知道这个问题的解决方案？

Answer 1

您可能需要在命令中获取ffmpeg的完全限定路径。

如果它位于/data/data/douglasanunciacao.ndksample/app_lib文件夹中，则String cmd = "/data/data/douglasanunciacao.ndksample/app_lib/ffmpeg -i "+ cameraPath + "VID_20150728_150045662.mp4 -y "+ cameraPath + "output.mp4";