# 常见问题

- [苹果电脑无法找到 Camin 摄像头](https://help.camin.cn/faq/camin-camera-installation-instructions.md)
- [Windows无法找到 Camin 摄像头](https://help.camin.cn/faq/failed-loading-camin-virtual-camera.md)
- [在 Classin 大屏录制异常，怎么办？](https://help.camin.cn/faq/zai-classin-da-ping-lu-zhi-yi-chang-zen-me-ban.md)
- [视频播放卡顿，怎么办？](https://help.camin.cn/faq/shi-pin-bo-fang-ka-dun-zen-me-ban.md)
- [如何找回没有正常保存的视频](https://help.camin.cn/faq/recover-videos.md)
- [投屏失败](https://help.camin.cn/faq/tou-ping-shi-bai.md)
- [PPT上传失败](https://help.camin.cn/faq/ppt-shang-chuan-shi-bai.md)
- [画笔太粗](https://help.camin.cn/faq/hua-bi-tai-cu.md)
- [使用虚拟背景后人像消失](https://help.camin.cn/faq/shi-yong-xu-ni-bei-jing-hou-ren-xiang-xiao-shi.md)
- [CamIn 在 ClassIn 中黑屏](https://help.camin.cn/faq/camin-zai-classin-zhong-hei-ping.md)
- [如何将圆形头像修改成方形？](https://help.camin.cn/faq/ru-he-jiang-yuan-xing-tou-xiang-xiu-gai-cheng-fang-xing.md)
- [头像如何放大或缩小？](https://help.camin.cn/faq/tou-xiang-ru-he-fang-da-huo-suo-xiao.md)
- [CamIn 可以免费体验专业版吗？](https://help.camin.cn/faq/camin-ke-yi-mian-fei-ti-yan-zhuan-ye-ban-ma.md)
- [会员到期后，加密分享的视频还能看吗？](https://help.camin.cn/faq/hui-yuan-dao-qi-hou-jia-mi-fen-xiang-de-shi-pin-hai-neng-kan-ma.md)
- [Mac 版启动时提示输入密码后直接退出](https://help.camin.cn/faq/mac-ban-qi-dong-shi-ti-shi-shu-ru-mi-ma-hou-zhi-jie-tui-chu.md)


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