-2 opencv runtime_error ai_generated partial

cv2.error: OpenCV(4.8.0) /modules/videoio/src/cap_images.cpp: 错误: (-2:未指定错误) 找不到编码器用于编解码器 0x47504A4D

cv2.error: OpenCV(4.8.0) /modules/videoio/src/cap_images.cpp: error: (-2:Unspecified error) could not find encoder for codec 0x47504A4D

ID: opencv/video-writer-codec-not-found

其他格式: JSON · Markdown 中文 · English
75%修复率
88%置信度
1证据数
2023-06-20首次发现

版本兼容性

版本状态引入弃用备注
4.6.0 active — — —
4.7.0 active — — —
4.8.0 active — — —
4.9.0 active — — —

根因分析

指定的编解码器（例如 MJPG、H264）不被系统上安装的 FFmpeg 或编码器后端支持。

English

The specified codec (e.g., MJPG, H264) is not supported by the installed FFmpeg or encoder backend on the system.

generic

官方文档

https://docs.opencv.org/4.x/dd/d9e/classcv_1_1VideoWriter.html

解决方案

  1. List available encoders with 'ffmpeg -encoders' and use a codec that appears in the list. Common working codecs: 'mp4v' (for MP4), 'XVID' (for AVI), 'MJPG' for motion JPEG.
  2. Install a more complete FFmpeg build (e.g., from conda-forge or compile with --enable-libx264) to add missing codecs.

无效尝试

常见但无效的做法:

  1. Reinstall OpenCV with --with-ffmpeg flag 65% 失败

    The issue is not build-time but runtime; FFmpeg may be installed but the specific codec might be missing or disabled in the FFmpeg build.

  2. Change codec ID to a random fourcc code 90% 失败

    Random codecs are even less likely to be supported; must use a codec known to work with the installed FFmpeg.

  3. Use .avi extension instead of .mp4 50% 失败

    The extension does not determine the codec; the fourcc code must match a supported encoder.