Google Chrome not playing video in mp4 using mediaelement.js?

Question

Google Chrome

I'm using the latest version of the mediaelement.js library on my website to play html5 videos.
Something strange is happening with Google Chrome. It plays one video but doesn't want to play another video. Both are in mp4 format. And in the case of the second video, there is no fallback to the webm format.
Both videos are converted with ffmpeg:

ffmpeg -i input.mov \
  -acodec libfaac -ab 96k \
  -vcodec libx264 -vpre slower -vpre main \
  -level 21 -refs 2 -b 345k -bt 345k \
  -threads 0 -s 640x360 output.mp4

Without the mediaelement.js library, the first video plays fine in mp4, but the second one switches to webm.
Links:
random.net.ua/video_test/video1.html ok
random.net.ua/video_test/video2.html ok
random.net.ua/video_test/video1-mediaelement.html ok
random.net.ua/video_test/video2- mediaelement.html fail
Question on stackoverflow: stackoverflow.com/questions/11393050/google-chrome...

Answer 1

It seems that google chrome has dropped support for h264. And one more thing: I understand correctly that you encode video in webm using x264?