Fatal signal 11 (SIGSEGV) at 0xdeadbaad (code=1)

Hello I have problem to use the FFmpeg in the ImageTargets.cpp . I want to use the FFmpeg to decode the video file, then convert frame to OpenGL ES texture. Here is my ffmpeg and openGL ES code in the ImageTargets.cpp: [CODE] JNIEXPORT void JNICALL Java_com_qualcomm_QCARSamples_ImageTargets_ImageTargetsRenderer_drawFrame(JNIEnv *, jobject) { ... while((i==0) && (av_read_frame(pFormatCtx, &packet)>=0)) { if(packet.stream_index==videoStream) { avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet); if(frameFinished) { LOGI("packet pts %llu", packet.pts); img_convert_ctx = sws_getCachedContext(img_convert_ctx, pCodecCtx->width, pCodecCtx->height, pCodecCtx->pix_fmt, target_width, target_height, PIX_FMT_RGB24, SWS_BICUBIC, NULL, NULL, NULL); if(img_convert_ctx == NULL) { LOGE("could not initialize conversion context\n"); return; } sws_scale(img_convert_ctx, (const uint8_t* const*)pFrame->data, pFrame->linesize, 0, pCodecCtx->height, pFrameRGB->data, pFrameRGB->linesize); videoTextures[0]->mWidth = 512; videoTextures[0]->mHeight = 256; videoTextures[0]->mData = pFrameRGB->data[0]; glClearColor(0.0f, 0.0f, 0.0f, 1.0f); glGenTextures(1, &s_texture); videoTextures[0]->mTextureID = s_texture; glBindTexture(GL_TEXTURE_2D,s_texture); glPixelStorei(GL_UNPACK_ALIGNMENT, 2); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); if(0 == got_texture) { glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, videoTextures[0]->mWidth, videoTextures[0]->mHeight, 0, GL_RGB, GL_UNSIGNED_BYTE, (GLvoid *) videoTextures[0]->mData); glTexSubImage2D(GL_TEXTURE_2D, 0, 0,0, videoTextures[0]->mWidth, videoTextures[0]->mHeight, GL_RGB, GL_UNSIGNED_BYTE, (GLvoid *) videoTextures[0]->mData); }else { glTexSubImage2D(GL_TEXTURE_2D, 0, 0,0, videoTextures[0]->mWidth, videoTextures[0]->mHeight, GL_RGB, GL_UNSIGNED_BYTE, (GLvoid *) videoTextures[0]->mData); LOGI("glTexSubImage2D!!"); } LOGI("size of texture: %d x %d", videoTextures[0]->mWidth, videoTextures[0]->mHeight); i = 1; error = glGetError(); if( error != GL_NO_ERROR ) { LOGE("couldn't create texture!!"); } else { got_texture = 1; LOGE("no error"); } } } av_free_packet(&packet); } isFirstRender = 0; }[/CODE] Then I call this method in the onResume() of ImageTargets.java, I use a thread to control the drawFrame(), let the texture changes according to the frame rate. Here is my code: [CODE] private Handler videoHandler = new Handler(){ @Override public void handleMessage(Message msg) { mGlView.queueEvent(new Runnable() { public void run() { mRenderer.drawFrame(); } }); }; }; protected void onResume() { DebugLog.LOGD("ImageTargets::onResume"); super.onResume(); ImageTargetsRenderer.mainActivityHandler = new Handler() { @Override public void handleMessage(Message msg) { ........ new Thread(){ public void run(){ int stopFlag = 0; while(unStop){ try { sleep(msPerFrame);// ms per frame videoHandler.sendEmptyMessage(0); stopFlag++; if(stopFlag == videoFrameNum - 1) unStop = false; } catch (InterruptedException e) { e.printStackTrace(); } } } }.start(); } }; }[/CODE] The texture works correctly, but after decoded some frames, it always error , the error message is: [CODE]06-18 20:32:50.362: A/libc(31948): @@@ ABORTING: HEAP MEMORY CORRUPTION IN dlfree 06-18 20:32:50.362: A/libc(31948): Fatal signal 11 (SIGSEGV) at 0xdeadbaad (code=1) [/CODE] Why emerge this error? Anyone with a solution? Thanks. Joe.