我試圖從使用FFmpeg的視頻轉換爲jni中的OpenGL ES紋理,但是我得到的所有圖像都是黑色紋理。我輸出了帶有glGetError()
的OpenGL,但沒有錯誤。將FFmpeg幀轉換爲OpenGL ES紋理
這裏是我的代碼:
void* pixels;
int err;
int i;
int frameFinished = 0;
AVPacket packet;
static struct SwsContext *img_convert_ctx;
static struct SwsContext *scale_context = NULL;
int64_t seek_target;
int target_width = 320;
int target_height = 240;
GLenum error = GL_NO_ERROR;
sws_freeContext(img_convert_ctx);
i = 0;
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_getContext(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);
LOGI("sws_scale");
videoTextures = new Texture*[1];
videoTextures[0]->mWidth = 256; //(unsigned)pCodecCtx->width;
videoTextures[0]->mHeight = 256; //(unsigned)pCodecCtx->height;
videoTextures[0]->mData = pFrameRGB->data[0];
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glGenTextures(1, &(videoTextures[0]->mTextureID));
glBindTexture(GL_TEXTURE_2D, videoTextures[0]->mTextureID);
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_RGBA, videoTextures[0]->mWidth, videoTextures[0]->mHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, (GLvoid *)videoTextures[0]->mData);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0,0, videoTextures[0]->mWidth, videoTextures[0]->mHeight, GL_RGBA, GL_UNSIGNED_BYTE, (GLvoid *)videoTextures[0]->mData);
}else
{
glTexSubImage2D(GL_TEXTURE_2D, 0, 0,0, videoTextures[0]->mWidth, videoTextures[0]->mHeight, GL_RGBA, GL_UNSIGNED_BYTE, (GLvoid *)videoTextures[0]->mData);
}
i = 1;
error = glGetError();
if(error != GL_NO_ERROR) {
LOGE("couldn't create texture!!");
switch (error) {
case GL_INVALID_ENUM:
LOGE("GL Error: Enum argument is out of range");
break;
case GL_INVALID_VALUE:
LOGE("GL Error: Numeric value is out of range");
break;
case GL_INVALID_OPERATION:
LOGE("GL Error: Operation illegal in current state");
break;
case GL_OUT_OF_MEMORY:
LOGE("GL Error: Not enough memory to execute command");
break;
default:
break;
}
}
}
}
av_free_packet(&packet);
}
我已經成功地改變了pFrameRGB中到Java位,但我只是想將其更改爲在C代碼的紋理。
編輯1我輸出了紋理ID,它是0;紋理ID可能爲零?我更改了我的代碼 ,但它始終爲零。
編輯2 紋理顯示,但它是一團糟。