e814cb64e7
根因（实测确认，非推测） 上游 nvenc 0.1.0 的 encode_picture 只设置 picture_type=NV_ENC_PIC_TYPE_IDR， 却从未设置 encode_pic_flags=NV_ENC_PIC_FLAG_FORCEIDR。NVENC 会据此忽略请求、 继续输出 P 帧。首帧之所以「看起来正常」，是因为 frame_idx==0 本来就强制 IDR， 与该字段无关——这也是该缺陷长期未被发现的原因。 证据（同一 frame_count=4，修复前后） - 修复前：输出 NAL 首字节 0x61 → 0x61 & 0x1F = 1 = 普通 P 片 - 修复后：输出 NAL 首字节 0x65 → 0x65 & 0x1F = 5 = IDR 片 影响 这解释了构建运行手册 §6.1 记录的「静止桌面黑屏」：NVENC 路径的重编 IDR 从未 真正生效，KeyFrameReq 拿不到 IDR 就无法从解码错误中恢复。 改动 - 新增 vendor/nvenc（上游为 MIT 许可，可自由修改分发，符合商用要求） - vendor/nvenc/src/safe/encoder.rs：picture_type=IDR 时置 ForceIDR； IntraRefresh 时置 ForceIntra。改动处有「本项目补丁」注释标记 - agent/Cargo.toml：nvenc 改为 path 依赖指向 vendor 版本 建议后续向上游提 PR（github.com/AlsoSylv/nvenc），以降低长期维护成本。 验证：跳帧后发 KeyFrameReq，第 3 帧即收到 IDR 并解码成功
27 lines
1.5 KiB
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27 lines
1.5 KiB
Plaintext
Notice Regarding Standards. I do not provide a license or sublicense to
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any Intellectual Property Rights relating to any standards, including but not
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limited to any audio and/or video codec technologies such as MPEG-2, MPEG-4;
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(collectively, the "Media Technologies"). For clarity, you will pay any
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royalties due for such third party technologies, which may include the Media
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Technologies that are owed as a result of me providing the Software to you.
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Copyright 2025 AlsoSylv
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Permission is hereby granted, free of charge, to any person obtaining a copy
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE. |