vim3视频硬解可以直接输出RGB或者BGR，而不是YUV(NV12)吗？

zylo117 · April 28, 2021, 8:06am

请问vim3硬解可以直接输出RGB或者BGR或者其他格式，而不是YUV(NV12)吗？

numbqq/aml_hardware_decode_demo/blob/ionvideo/ionplayer.c#L298


            printf("read file error!\n");
            rewind(fp);
        }
        isize = 0;
        do {
            vframebuf_t vf;
            ret = amlv4l_dequeuebuf(amvideo, &vf);
            if (ret >= 0) {
                printf("vf idx%d pts 0x%x\n", vf.index, vf.pts);
                fwrite(vbuffer[vf.index].ptr, vbuffer[vf.index].size, 1, yuv);
				fflush(yuv);
                ret = amlv4l_queuebuf(amvideo, &vf);
                if (ret < 0) {
                    //printf("amlv4l_queuebuf %d\n", ret);
                }
            } else {
                //printf("amlv4l_dequeuebuf %d\n", ret);
            }
            ret = codec_write(pcodec, buffer + isize, Readlen);
            if (ret < 0) {

现在根据ionplayer获得的是yuv nv12格式，要在opencv中转换到bgr才能用，就挺吃cpu的，想问可不可以直接在硬解芯片中完成转换？谢谢

numbqq · April 28, 2021, 10:35am

自己改下代码：

github.com

numbqq/aml_hardware_decode_demo/blob/ionvideo/ionplayer.c#L150


amvideo = new_amvideo(FLAGS_V4L_MODE);
if (!amvideo) {
    printf("amvideo create failed\n");
    ret = -ENODEV;
    goto fail;
}
amvideo->display_mode = 0;
amvideo->use_frame_mode = 0;
ret = amvideo_init(amvideo, 0, width, height,
        V4L2_PIX_FMT_NV12, MESON_BUFFER_SIZE);
if (ret < 0) {
    printf("amvideo_init failed\n");
    amvideo_release(amvideo);
    goto fail;
}
ret = amvideo_start(amvideo);
if (ret < 0) {
    amvideo_release(amvideo);
    goto fail;
}

zylo117 · April 28, 2021, 3:37pm

github.com

numbqq/aml_hardware_decode_demo/blob/ionvideo/ionplayer.c#L114


        if (vbuffer[i].ptr) {
            munmap(vbuffer[i].ptr, vbuffer[i].size);
            CMEM_free(&vbuffer[i].buffer);
        }
    }
}
static int AllocBuffers(int width, int height)
{
    int i, size, ret;
    CMEM_init();
    size = width * height * 3 / 2;
    for (i = 0; i < MESON_BUFFER_SIZE; i++) {
        ret = CMEM_alloc(size, &vbuffer[i].buffer);
        if (ret < 0) {
            printf("CMEM_alloc failed\n");
            FreeBuffers();
            goto fail;
        }
        vbuffer[i].index = i;
        vbuffer[i].size = size;
        vbuffer[i].ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, vbuffer[i].buffer.mImageFd, 0);

还有这个地方也要改成这个才能工作

size = width * height * 3;

就差h265硬解输出画面异常，解决这个就完美了