Decodificación de video usando FFMpeg para Android
Traté de decodificar video usando la biblioteca FFMpeg a partir de los ejemplos de ejemplo disponibles en Internet, lo descubro con la nueva versión de ffmpeg, aquí está el código que llamé desde mi archivo de clase,
private static native int decodeVideo(String filename);
decodeVideo(getString(R.string._sdcard_abc_3gp));
ahora en el archivo .c ubicado en el directorio JNI, escribí este código,
jint Java_ru_dzakhov_ffmpeg_test_MainActivity_decodeVideo(JNIEnv* env, jobject
javaThis,jstring filename) {
AVFormatContext *pFormatCtx;
int i, videoStream;
AVCodecContext *pCodecCtx;
AVCodec *pCodec;
AVFrame *pFrame;
AVFrame *pFrameRGB;
AVPacket packet;
int frameFinished;
int numBytes;
uint8_t *buffer;
// Register all formats and codecs
av_register_all();
// Open video file
const jbyte *str;
str = (*env)->GetStringUTFChars(env, filename, NULL);
if(av_open_input_file(&pFormatCtx, str, NULL, 0, NULL)!=0)
{
LOGI("Can't open file '%s'\n", str);
return 1;
}
else
{
LOGI("File is opened\n");
LOGI("File '%s', Codec %s",pFormatCtx->filename,pFormatCtx->iformat->name);
}
// Dump information about file onto standard error
LOGI("dump_format");
dump_format(pFormatCtx, 0, filename, 0);
LOGI("dump_format DONE");
// Find the first video stream
videoStream=-1;
for(i=0; i<pFormatCtx->nb_streams; i++)
if(pFormatCtx->streams[i]->codec->codec_type==CODEC_TYPE_VIDEO)
//if(pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO)
{
LOGI("videoStream:: %d",videoStream);
videoStream=i;
break;
}
if(videoStream==-1)
return -1; // Didn't find a video stream
// Get a pointer to the codec context for the video stream
pCodecCtx=pFormatCtx->streams[videoStream]->codec;
// Find the decoder for the video stream
pCodec=avcodec_find_decoder(pCodecCtx->codec_id);
if(pCodec==NULL) {
fprintf(stderr, "Unsupported codec!\n");
LOGI("Unsupported codec!\n");
return -1; // Codec not found
}
// Open codec
if(avcodec_open(pCodecCtx, pCodec)<0){
LOGI("Codec Opened!\n");
return -1; // Could not open codec
}
// Allocate video frame
pFrame=avcodec_alloc_frame();
// Allocate an AVFrame structure
pFrameRGB=avcodec_alloc_frame();
if(pFrameRGB==NULL){
LOGI("checking --->>> pFrameRGB==NULL\n");
return -1;
}
// Determine required buffer size and allocate buffer
LOGI("Determine required buffer size and allocate buffer\n");
numBytes=avpicture_get_size(PIX_FMT_RGB24, pCodecCtx->width,
pCodecCtx->height);
LOGI("numBytes %d",numBytes);
buffer=(uint8_t *)av_malloc(numBytes*sizeof(uint8_t));
// Assign appropriate parts of buffer to image planes in pFrameRGB
// Note that pFrameRGB is an AVFrame, but AVFrame is a superset
// of AVPicture
avpicture_fill((AVPicture *)pFrameRGB, buffer, PIX_FMT_RGB24,
pCodecCtx->width, pCodecCtx->height);
// Read frames and save first five frames to disk
i=0;
while(av_read_frame(pFormatCtx, &packet)>=0) {
// Is this a packet from the video stream?
if(packet.stream_index==videoStream) {
// Decode video frame
avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished,&packet);
//packet.data, packet.size);
// Did we get a video frame?
if(frameFinished) {
// Convert the image from its native format to RGB
/*Temporarily down
*
* img_convert((AVPicture *)pFrameRGB, PIX_FMT_RGB24,
(AVPicture*)pFrame, pCodecCtx->pix_fmt, pCodecCtx->width,pCodecCtx->height);*/
// Save the frame to phone memory
LOGI("Saving Frame\n");
SaveFrame(pFrameRGB, pCodecCtx->width, pCodecCtx->height, ++i);
LOGI("After Saving Frame\n");
}
}
// Free the packet that was allocated by av_read_frame
av_free_packet(&packet);
}
// Free the RGB image
av_free(buffer);
av_free(pFrameRGB);
// Free the YUV frame
av_free(pFrame);
// Close the codec
avcodec_close(pCodecCtx);
// Close the video file
av_close_input_file(pFormatCtx);
return 0;
}
después de compilar el código obtengo esto en el registro,
07-04 10:58:38.961: D/dalvikvm(1010): Trying to load lib /data/data/ru.dzakhov.ffmpeg.test/lib/libmylib.so 0x4051e878
07-04 10:58:38.971: D/dalvikvm(1010): Added shared lib /data/data/ru.dzakhov.ffmpeg.test/lib/libmylib.so 0x4051e878
07-04 10:58:38.971: D/dalvikvm(1010): No JNI_OnLoad found in /data/data/ru.dzakhov.ffmpeg.test/lib/libmylib.so 0x4051e878, skipping init
07-04 10:58:39.011: I/System.out(1010): Creating Engine
07-04 10:58:39.011: I/mylib(1010): initiated
07-04 10:58:39.011: I/System.out(1010): Decoding Video
07-04 10:58:39.011: I/System.out(1010): passing video::/sdcard/NativeMedia.ts
07-04 10:58:39.101: W/dalvikvm(231): disableGcForExternalAlloc: false
07-04 10:58:39.121: I/DEBUG(71): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
07-04 10:58:39.121: I/DEBUG(71): Build fingerprint: 'htc_asia_india/htc_icong/icong:2.3.3/GRI40/68450.5:user/release-keys'
07-04 10:58:39.121: I/DEBUG(71): pid: 1010, tid: 1010 >>> ru.dzakhov.ffmpeg.test <<<
07-04 10:58:39.121: I/DEBUG(71): signal 4 (SIGILL), code 1 (ILL_ILLOPC), fault addr 8102de90
07-04 10:58:39.121: I/DEBUG(71): r0 0000ac28 r1 40521b98 r2 40526340 r3 42157cc8
07-04 10:58:39.121: I/DEBUG(71): r4 bee7d368 r5 00000004 r6 40521b98 r7 42157c88
07-04 10:58:39.121: I/DEBUG(71): r8 bee7d348 r9 42157c80 10 42157c6c fp 42f0f04c
07-04 10:58:39.121: I/DEBUG(71): ip 8102de91 sp bee7d348 lr 80018378 pc 8102de90 cpsr a0000030
07-04 10:58:39.121: I/DEBUG(71): d0 4140000041600000 d1 3ff0000041680000
07-04 10:58:39.121: I/DEBUG(71): d2 bf80000000000000 d3 0000000000000000
07-04 10:58:39.121: I/DEBUG(71): d4 0000000000000000 d5 3ff000003f800000
07-04 10:58:39.121: I/DEBUG(71): d6 bff000003f800000 d7 4160000000000000
07-04 10:58:39.121: I/DEBUG(71): d8 0000000000000000 d9 0000000000000000
07-04 10:58:39.121: I/DEBUG(71): d10 0000000000000000 d11 0000000000000000
07-04 10:58:39.121: I/DEBUG(71): d12 0000000000000000 d13 0000000000000000
07-04 10:58:39.121: I/DEBUG(71): d14 0000000000000000 d15 0000000000000000
07-04 10:58:39.121: I/DEBUG(71): scr 20000012
07-04 10:58:39.221: I/DEBUG(71): #00 pc 0002de90 /data/data/ru.dzakhov.ffmpeg.test/lib/libmylib.so
07-04 10:58:39.221: I/DEBUG(71): #01 pc 0004f13c /system/lib/libdvm.so
07-04 10:58:39.221: I/DEBUG(71): #02 pc 0001d584 /system/lib/libdvm.so
07-04 10:58:39.221: I/DEBUG(71): #03 pc 00022b8c /system/lib/libdvm.so
07-04 10:58:39.221: I/DEBUG(71): #04 pc 00021a80 /system/lib/libdvm.so
07-04 10:58:39.221: I/DEBUG(71): #05 pc 0006060a /system/lib/libdvm.so
07-04 10:58:39.221: I/DEBUG(71): #06 pc 0006828e /system/lib/libdvm.so
07-04 10:58:39.221: I/DEBUG(71): #07 pc 0001d584 /system/lib/libdvm.so
07-04 10:58:39.221: I/DEBUG(71): #08 pc 00022b8c /system/lib/libdvm.so
07-04 10:58:39.231: I/DEBUG(71): #09 pc 00021a80 /system/lib/libdvm.so
07-04 10:58:39.231: I/DEBUG(71): #10 pc 0006045c /system/lib/libdvm.so
07-04 10:58:39.231: I/DEBUG(71): #11 pc 0004c430 /system/lib/libdvm.so
07-04 10:58:39.231: I/DEBUG(71): #12 pc 00037638 /system/lib/libandroid_runtime.so
07-04 10:58:39.231: I/DEBUG(71): #13 pc 00038456 /system/lib/libandroid_runtime.so
07-04 10:58:39.231: I/DEBUG(71): #14 pc 00008ca2 /system/bin/app_process
07-04 10:58:39.231: I/DEBUG(71): #15 pc 00014f24 /system/lib/libc.so
07-04 10:58:39.231: I/DEBUG(71): code around pc:
07-04 10:58:39.231: I/DEBUG(71): 8102de70 003d9cd0 00000408 0029e598 0029e5de
07-04 10:58:39.231: I/DEBUG(71): 8102de80 0029e5d8 0029e5d8 0029e5cc 0029e5c8
07-04 10:58:39.231: I/DEBUG(71): 8102de90 4ff0e92d b0994604 f0004615 6823f945
07-04 10:58:39.231: I/DEBUG(71): 8102dea0 46294620 32a4f8d3 47982200 46044f81
07-04 10:58:39.231: I/DEBUG(71): 8102deb0 a8172300 22004621 9300447f f9c0f060
07-04 10:58:39.231: I/DEBUG(71): code around lr:
07-04 10:58:39.231: I/DEBUG(71): 80018358 3497c004 3488c004 3afffff9 e2888004
07-04 10:58:39.231: I/DEBUG(71): 80018368 eafffff9 e899000c e594c008 e12fff3c
07-04 10:58:39.231: I/DEBUG(71): 80018378 e3550000 1594c00c 188c0003 e914a3f0
07-04 10:58:39.231: I/DEBUG(71): 80018388 e1a05e22 e5946004 e3a02000 e4d6c001
07-04 10:58:39.231: I/DEBUG(71): 80018398 e35c0000 0a000007 e2822001 e35c0044
07-04 10:58:39.231: I/DEBUG(71): stack:
07-04 10:58:39.231: I/DEBUG(71): bee7d308 000001b4
07-04 10:58:39.231: I/DEBUG(71): bee7d30c c0000000
07-04 10:58:39.231: I/DEBUG(71): bee7d310 80018540 /system/lib/libdvm.so
07-04 10:58:39.231: I/DEBUG(71): bee7d314 0000cf98
07-04 10:58:39.231: I/DEBUG(71): bee7d318 42157c6c
07-04 10:58:39.231: I/DEBUG(71): bee7d31c afd139d9 /system/lib/libc.so
07-04 10:58:39.231: I/DEBUG(71): bee7d320 0002de91
07-04 10:58:39.241: I/DEBUG(71): bee7d324 0000000e
07-04 10:58:39.241: I/DEBUG(71): bee7d328 80018540 /system/lib/libdvm.so
07-04 10:58:39.241: I/DEBUG(71): bee7d32c 00000070
07-04 10:58:39.241: I/DEBUG(71): bee7d330 42157c6c
07-04 10:58:39.241: I/DEBUG(71): bee7d334 00238100
07-04 10:58:39.241: I/DEBUG(71): bee7d338 00000000
07-04 10:58:39.241: I/DEBUG(71): bee7d33c 00000000
07-04 10:58:39.241: I/DEBUG(71): bee7d340 df002777
07-04 10:58:39.241: I/DEBUG(71): bee7d344 e3a070ad
07-04 10:58:39.241: I/DEBUG(71): #00 bee7d348 423692b4
07-04 10:58:39.241: I/DEBUG(71): bee7d34c 0000cf98
07-04 10:58:39.241: I/DEBUG(71): bee7d350 40521b98
07-04 10:58:39.241: I/DEBUG(71): bee7d354 8102de91 /data/data/ru.dzakhov.ffmpeg.test/lib/libmylib.so
07-04 10:58:39.241: I/DEBUG(71): bee7d358 80018540 /system/lib/libdvm.so
07-04 10:58:39.241: I/DEBUG(71): bee7d35c 0000cf98
07-04 10:58:39.241: I/DEBUG(71): bee7d360 bee7d368
07-04 10:58:39.241: I/DEBUG(71): bee7d364 800499df /system/lib/libdvm.so
07-04 10:58:39.241: I/DEBUG(71): bee7d368 42157c80
07-04 10:58:39.241: I/DEBUG(71): bee7d36c 42d58795
07-04 10:58:39.241: I/DEBUG(71): bee7d370 8102de91 /data/data/ru.dzakhov.ffmpeg.test/lib/libmylib.so
07-04 10:58:39.241: I/DEBUG(71): bee7d374 bee7d418
07-04 10:58:39.241: I/DEBUG(71): bee7d378 00016de0
07-04 10:58:39.241: I/DEBUG(71): bee7d37c 0000ac28
07-04 10:58:39.241: I/DEBUG(71): bee7d380 00000001
07-04 10:58:39.241: I/DEBUG(71): bee7d384 bee7d418
07-04 10:58:39.241: I/DEBUG(71): bee7d388 42157c80
07-04 10:58:39.241: I/DEBUG(71): bee7d38c 40521b98
07-04 10:58:39.241: I/DEBUG(71): bee7d390 423692b4
07-04 10:58:39.241: I/DEBUG(71): bee7d394 800499a1 /system/lib/libdvm.so
07-04 10:58:39.241: I/DEBUG(71): bee7d398 42157c80
07-04 10:58:39.241: I/DEBUG(71): bee7d39c 8004f13f /system/lib/libdvm.so
07-04 10:58:39.241: I/DEBUG(71): #01 bee7d3a0 00000002
07-04 10:58:39.251: I/DEBUG(71): bee7d3a4 0000000e
07-04 10:58:39.251: I/DEBUG(71): bee7d3a8 bee7d418
07-04 10:58:39.251: I/DEBUG(71): bee7d3ac 0000cf98
07-04 10:58:39.251: I/DEBUG(71): bee7d3b0 400198b8
07-04 10:58:39.251: I/DEBUG(71): bee7d3b4 42d5861c
07-04 10:58:39.251: I/DEBUG(71): bee7d3b8 42157c98
07-04 10:58:39.251: I/DEBUG(71): bee7d3bc bee7d410
07-04 10:58:39.251: I/DEBUG(71): bee7d3c0 40521b98
07-04 10:58:39.251: I/DEBUG(71): bee7d3c4 8001d588 /system/lib/libdvm.so
¿No se puede entender cuál es el problema exacto? Aquí se usa la función SaveFrame que parece
void SaveFrame(AVFrame *pFrame, int width, int height, int iFrame) {
FILE *pFile;
char szFilename[32];
int y;
// Open file
LOGI("Opening file!");
sprintf(szFilename, "frame%d.ppm", iFrame);
pFile=fopen(szFilename, "wb");
if(pFile==NULL)
return;
// Write header
fprintf(pFile, "P6\n%d %d\n255\n", width, height);
//LOGI("width::"+width+"Height::"+height);
// Write pixel data
for(y=0; y<height; y++){
LOGI("writing file");
fwrite(pFrame->data[0]+y*pFrame->linesize[0], 1, width*3, pFile);
}
// Close file
fclose(pFile);
}
en el registro no recibí ningún registro que coloqué en el código!
Por favor, ayúdame,
Gracias