How to write MP4 with OpenCV3

When trying to write MP4 file (H264), I tired code of

    fourcc = cv2.VideoWriter_fourcc(*'MP4V')
    //or
    fourcc = cv2.VideoWriter_fourcc(*'X264')
    voObj = cv2.VideoWriter('output.mp4',fourcc, 15.0, (1280,360))

fourcc = cv2.VideoWriter_fourcc(*'MP4V')

//or

fourcc = cv2.VideoWriter_fourcc(*'X264')

voObj = cv2.VideoWriter('output.mp4',fourcc, 15.0, (1280,360))

And I got error saying:

<span class="pln">FFMPEG</span><span class="pun">:</span><span class="pln"> tag </span><span class="lit">0x5634504d</span><span class="pun">/</span><span class="str">'MP4V'</span> <span class="kwd">is</span> <span class="kwd">not</span><span class="pln"> supported </span><span class="kwd">with</span><span class="pln"> codec id </span><span class="lit">13</span> <span class="kwd">and</span><span class="pln"> format </span><span class="str">'mp4 / MP4 (MPEG-4 Part 14)'</span>

FFMPEG: tag 0x5634504d/'MP4V' is not supported with codec id 13 and format 'mp4 / MP4 (MPEG-4 Part 14)'

This problem is solved by changing the fourcc to the ASCII number directly to cv2.VideoWriter(), i.e.

    outputVideo.open(writeName, 0x00000021, texHelper-&gt;caps[0].get(cv::CAP_PROP_FPS), S, true);

1	outputVideo.open(writeName, 0x00000021, texHelper->caps[0].get(cv::CAP_PROP_FPS), S, true);

reference:

https://devtalk.nvidia.com/default/topic/1029451/jetson-tx2/-python-what-is-the-four-characters-fourcc-code-for-mp4-encoding-on-tx2/

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