title: how to conver a m4v(mpeg) codec raw video to a mp4 file which can be played?
body: <p>I uses the following command that can extract the mpeg4 raw video file：</p>
  <pre><code>ffmpeg -i D:\mp4v-mp4\test\360.mov -vcodec copy -an -f rawvideo D:\mp4v-mp4\test\360CmdSplit_std.dat
  </code></pre>
  <p>but how can I convert the rawvideo file back to a playable mp4 file.
  I have tried the follow cmd, but failed:</p>
  <pre><code>ffmpeg -y -f m4v -i D:\mp4v-mp4\test\360CmdSplit_std1.dat -vcodec copy D:\mp4v-mp4\test\tmp360.mp4
  </code></pre>