HarmonyOS 使用265硬编码时如何指定输出码率？

Question

通过HarmonyOS265硬编码时，输入一个surface，如何指定输出是8bit还是10bit的呢？

Answer 1

编码不能输入surface，编码surface模式，是编码这边给个surface出去，外部往surface里填充8bit或10bit流，填充10bit流时，在config阶段，OH\_MD\_KEY\_PROFILE要配成HEVC\_PROFILE\_MAIN\_10级别。填充8bit流时，不配置会走默认，输入是几bit流，输出就是几bit流。

int32_t VideoEncoder::Configure(const SampleInfo &sampleInfo)
{
  OH_AVFormat *format = OH_AVFormat_Create();
  CHECK_AND_RETURN_RET_LOG(format != nullptr, AVCODEC_SAMPLE_ERR_ERROR, "AVFormat create failed");
  OH_AVFormat_SetIntValue(format, OH_MD_KEY_WIDTH, sampleInfo.videoWidth);
  OH_AVFormat_SetIntValue(format, OH_MD_KEY_HEIGHT, sampleInfo.videoHeight);
  OH_AVFormat_SetDoubleValue(format, OH_MD_KEY_FRAME_RATE, sampleInfo.frameRate);
  OH_AVFormat_SetIntValue(format, OH_MD_KEY_PIXEL_FORMAT, sampleInfo.pixelFormat);
  OH_AVFormat_SetIntValue(format, OH_MD_KEY_VIDEO_ENCODE_BITRATE_MODE, CBR);
  OH_AVFormat_SetIntValue(format, OH_MD_KEY_BITRATE, sampleInfo.bitrate);
  OH_AVFormat_SetIntValue(format, OH_MD_KEY_PROFILE, sampleInfo.hevcProfile);
  if (sampleInfo.isHDRVivid) {
    OH_AVFormat_SetIntValue(format, OH_MD_KEY_I_FRAME_INTERVAL, 100);  // 100: I_FRAME_INTERVAL
  }
  AVCODEC_SAMPLE_LOGI("====== VideoEncoder config ======");
  AVCODEC_SAMPLE_LOGI("%{public}d*%{public}d, %{public}.1ffps", sampleInfo.videoWidth, sampleInfo.videoHeight,
    sampleInfo.frameRate);
  // 1024: ratio of kbps to bps
  AVCODEC_SAMPLE_LOGI("BitRate Mode: %{public}d, BitRate: %{public}" PRId64 "kbps", VBR, sampleInfo.bitrate / 1024);
  AVCODEC_SAMPLE_LOGI("====== VideoEncoder config ======");

  int ret = OH_VideoEncoder_Configure(encoder_, format);
  CHECK_AND_RETURN_RET_LOG(ret == AV_ERR_OK, AVCODEC_SAMPLE_ERR_ERROR, "Config failed, ret: %{public}d", ret);
  OH_AVFormat_Destroy(format);
  format = nullptr;
  return AVCODEC_SAMPLE_ERR_OK;
}