Tôi đang cố gắng trích xuất Bản nhạc 0 (đoạn video) của một tệp avi bằng cách sử dụng MediaExtract và mã hóa thành định dạng h264 bằng MediaCodec. Sau đây là cách tôi định cấu hình mediaCodecKhông thể khởi tạo bộ đa phương tiện khi sử dụng setDataSource()
public MediaCodec configure_codec(){
Log.d("OUT","configure starts");
MediaCodec codec = MediaCodec.createEncoderByType("video/avc");
MediaFormat format = MediaFormat.createVideoFormat("video/avc", 320, 240);
format.setInteger(MediaFormat.KEY_BIT_RATE, 700000);
format.setInteger(MediaFormat.KEY_FRAME_RATE, 15);
format.setInteger(MediaFormat.KEY_COLOR_FORMAT,MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420Planar);
format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 5);
//Configure codec for encoding
codec.configure(format, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
Log.d("OUT","codec configured");
return codec;
}
Vấn đề tôi đang gặp phải trong phần này.
public MediaExtractor extract_video()
{
MediaExtractor extractor = new MediaExtractor();
//problem in this line
try{
extractor.setDataSource(file_in);
}catch(Throwable th){
Log.d("OUT", th.getMessage());
}
MediaFormat format = extractor.getTrackFormat(0);
String mime = format.getString(MediaFormat.KEY_MIME);
Log.d("OUT", String.format("MIME TYPE: %s", mime));
extractor.selectTrack(0);
return extractor;
}
Đây là nhật ký.
07-01 10:53:53.284: D/OUT(1779): Main starts
07-01 10:53:54.024: I/Choreographer(1779): Skipped 82 frames! The application may be doing too much work on its main thread.
07-01 10:53:54.373: I/Choreographer(1779): Skipped 247 frames! The application may be doing too much work on its main thread.
07-01 10:53:54.433: D/gralloc_goldfish(1779): Emulator without GPU emulation detected.
07-01 10:54:00.194: I/Choreographer(1779): Skipped 36 frames! The application may be doing too much work on its main thread.
07-01 10:54:00.336: D/OUT(1779): Button Start
07-01 10:54:00.336: D/OUT(1779): start starts
07-01 10:54:00.344: D/OUT(1779): /mnt/sdcard/test.avi
07-01 10:54:00.344: D/OUT(1779): /mnt/sdcard/result.h264
07-01 10:54:00.344: D/OUT(1779): configure starts
07-01 10:54:00.394: I/OMXClient(1779): Using client-side OMX mux.
07-01 10:54:00.504: I/SoftAVCEncoder(1779): Construct SoftAVCEncoder
07-01 10:54:00.534: I/ACodec(1779): setupVideoEncoder succeeded
07-01 10:54:00.534: E/OMXNodeInstance(1779): OMX_GetExtensionIndex failed
07-01 10:54:00.544: D/OUT(1779): codec configured
07-01 10:54:00.734: E/WVMExtractor(1779): Failed to open libwvm.so
07-01 10:54:00.734: D/OUT(1779): Failed to instantiate extractor.
07-01 10:54:00.744: D/AndroidRuntime(1779): Shutting down VM
07-01 10:54:00.755: W/dalvikvm(1779): threadid=1: thread exiting with uncaught exception (group=0x40a13300)
07-01 10:54:00.924: E/AndroidRuntime(1779): FATAL EXCEPTION: main
07-01 10:54:00.924: E/AndroidRuntime(1779): java.lang.IllegalArgumentException
07-01 10:54:00.924: E/AndroidRuntime(1779): at android.media.MediaExtractor.getTrackFormatNative(Native Method)
07-01 10:54:00.924: E/AndroidRuntime(1779): at android.media.MediaExtractor.getTrackFormat(MediaExtractor.java:195)
07-01 10:54:00.924: E/AndroidRuntime(1779): at com.app.convert_final.encoder_pack.extract_video(encoder_pack.java:46)
07-01 10:54:00.924: E/AndroidRuntime(1779): at com.app.convert_final.encoder_pack.start(encoder_pack.java:81)
07-01 10:54:00.924: E/AndroidRuntime(1779): at com.app.convert_final.MainActivity$1.onClick(MainActivity.java:27)
07-01 10:54:00.924: E/AndroidRuntime(1779): at android.view.View.performClick(View.java:4084)
07-01 10:54:00.924: E/AndroidRuntime(1779): at android.view.View$PerformClick.run(View.java:16966)
07-01 10:54:00.924: E/AndroidRuntime(1779): at android.os.Handler.handleCallback(Handler.java:615)
07-01 10:54:00.924: E/AndroidRuntime(1779): at android.os.Handler.dispatchMessage(Handler.java:92)
07-01 10:54:00.924: E/AndroidRuntime(1779): at android.os.Looper.loop(Looper.java:137)
07-01 10:54:00.924: E/AndroidRuntime(1779): at android.app.ActivityThread.main(ActivityThread.java:4745)
07-01 10:54:00.924: E/AndroidRuntime(1779): at java.lang.reflect.Method.invokeNative(Native Method)
07-01 10:54:00.924: E/AndroidRuntime(1779): at java.lang.reflect.Method.invoke(Method.java:511)
07-01 10:54:00.924: E/AndroidRuntime(1779): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
07-01 10:54:00.924: E/AndroidRuntime(1779): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
07-01 10:54:00.924: E/AndroidRuntime(1779): at dalvik.system.NativeStart.main(Native Method)
07-01 10:54:03.394: I/Process(1779): Sending signal. PID: 1779 SIG: 9
Tôi nên giải quyết vấn đề này như thế nào? libwvm.so là gì? Tại sao nó không mở được?
Dưới đây là làm thế nào tôi gọi là chức năng:
public void start()
{
this.running = true;
Log.d("OUT","start starts");
Log.d("OUT", file_in);
Log.d("OUT", file_out);
codec = configure_codec();
extractor = extract_video();
now_start();
}
MediaInfo của "test.avi"
General
Complete name : D:\test.avi
Format : AVI
Format/Info : Audio Video Interleave
File size : 967 KiB
Duration : 2s 500ms
Overall bit rate : 3 169 Kbps
Video
ID : 0
Format : JPEG
Codec ID : MJPG
Duration : 2s 500ms
Bit rate : 2 782 Kbps
Width : 320 pixels
Height : 240 pixels
Original height : 480 pixels
Display aspect ratio : 4:3
Frame rate : 30.000 fps
Color space : YUV
Chroma subsampling : 4:2:2
Bit depth : 8 bits
Scan type : Interlaced
Compression mode : Lossy
Bits/(Pixel*Frame) : 1.207
Stream size : 849 KiB (88%)
Audio
ID : 1
Format : PCM
Format settings, Endianness : Little
Format settings, Sign : Signed
Codec ID : 1
Duration : 2s 500ms
Bit rate mode : Constant
Bit rate : 352.8 Kbps
Channel(s) : 1 channel
Sampling rate : 22.05 KHz
Bit depth : 16 bits
Stream size : 108 KiB (11%)
Alignment : Aligned on interleaves
Interleave, duration : 33 ms (1.00 video frame)
Full mã ở đây: http://pastebin.com/WiCp4SPq encoder_pack.java
http://pastebin.com/JjyR9pdH Main_Activity.java
Bạn có đăng mã thực hiện chiến lược này không? – JellicleCat