解码video使用FFMpeg为Android

我试图解码使用FFMpeg库从互联网上的示例例子的video,我想出了新版本的ffmpeg,这里是我从我的类文件调用的代码,

private static native int decodeVideo(String filename); decodeVideo(getString(R.string._sdcard_abc_3gp)); 

现在在位于JNI目录的.c文件中,我写了这个代码,

  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; } 

编译后我得到这个日志中的代码,

 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 

不明白什么是确切的问题吗? 这里用SaveFrame函数看起来像,

 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); } 

在日志中我没有得到任何我放在代码中的日志!

请帮帮我,

谢谢

Solutions Collecting From Web of "解码video使用FFMpeg为Android"

看着导致问题的指示…

$ rasm2 -a arm -d 4ff0e92d stclcs 0,cr15,[r9,#316]!

stc指令文档 。

search它,可能无法从用户空间执行此操作: 尝试在Android上执行MRC或MCR指令时获取ILL_ILLOPC(非法操作码)

然而,这不应该是你的问题真的吗? 🙂

尝试只在本地打印一些日志消息(或者至less在av_register_all()之前),不要添加任何其他额外的库,看看你是否正确。

我认为你用不适合Android的编译器选项构buildFFmpeg。

我build议遵循android-ffmpeg-tutorial ,它在Android上有FFmpeg的工作示例。 它也参考了关于为Android构buildFFmpeg的文章。

你也可以看看FFmpeg播放器AndroidFFmpeg更高级的Android代码,即使在Genymotion模拟器,我也testing过。 详细说明如何build立,从框中工作。

您的代码使用不推荐的FFmpeg调用,上述链接中的代码已针对此问题进行了更新。