Apps run as unpriveleged users and so can't access the audio device directly. You are supposed to do sound through the java apis.
pgil wrote: > I would like to open an mp3 file with my own audio player(based on > mplayer and FFmpeg) I packaged in a apk file. It runs fine using > command line and the executable version but not when packaged in apk. > I got the messages using adb logcat window: > > I/stdout ( 2115): PCM: Samplerate: 48000Hz Channels: Stereo Format > s16le > I/stdout ( 2115): [AO PCM] Info: Faster dumping is achieved with -vc > null -vo null -ao pcm:fast > I/stdout ( 2115): [AO PCM] Info: To write WAVE files use -ao > pcm:waveheader (default). > I/stderr ( 2115): [AO PCM] Failed to open /dev/msm_pcm_out for > writing! > I/stderr ( 2115): Failed to initialize audio driver 'pcm:file=/dev/ > msm_pcm_out' > I/stderr ( 2115): Could not open/initialize audio device -> no sound. > I/stdout ( 2115): Audio: no sound > I/stdout ( 2115): Video: no video > I/stdout ( 2115): Exiting... (End of file) > > I put the permission in the manifest file as follows: > > <uses-permission > android:name="android.permission.WRITE_SECURE_SETTINGS"></uses- > permission> > <uses-permission android:name="android.permission.WRITE_SETTINGS"></ > uses-permission> > <uses-permission android:name="android.permission.RECORD_AUDIO"></ > uses-permission> > <uses-permission > android:name="android.permission.MODIFY_AUDIO_SETTINGS"></uses- > permission> > <uses-permission android:name="android.permission.FACTORY_TEST"></ > uses-permission> > <uses-permission android:name="android.permission.HARDWARE_TEST"></ > uses-permission> > <uses-permission android:name="android.permission.INTERNET"></uses- > permission> > <uses-permission > android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses- > permission> > > > Any idea about what's wrong! Any help would be appreciated. > > best regards -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
