I've seen this post [here](http://answers.opencv.org/question/20436/opencvffmpegx264/), but I think I'm having a different problem with the said combo. Code:
cv::VideoWriter writer(output_path.string(), CV_FOURCC('X','2','6','4'), 60, frame_size);
Output:
> OpenCV: FFMPEG: tag 0x34363258/'X264'> is not supported with codec id 28 and> format 'mp4 / MP4 (MPEG-4 Part 14)'> OpenCV: FFMPEG: fallback to use tag> 0x00000021/'!???'
The video produced is unreadable. The FFmpeg I have is packaged by ubuntu maintainers, and it lists it was configured with "--enable-libx264". I made a repost [here](http://stackoverflow.com/questions/34024041/writing-x264-from-opencv-3-with-ffmpeg-on-linux) on SO. Any idea how I can make this combination work? Is it an OpenCV bug, FFmpeg bug, or neither?
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