Trying to mux a mov file to mp4

[Deepika]

Hi,

I just need to change the contianer format from mov to mp4 and retain 
the h264 and aac streams that it contains.
I tried this pipeline, But the output .mp4 file has only audio and no video.
gst-launch filesrc location=a.mov ! qtdemux name=qtd ! queue2 
qtd.video_00 ! mp4mux name=mux ! filesink location=a.mp4 qtd.audio_00 ! mux.

I tried some variations of this pipeline
gst-launch filesrc location=a.mov ! qtdemux name=qtd !  qtd.video_00 ! 
queue2 ! mp4mux name=mux ! filesink location=a.mp4 qtd.audio_00 ! queue2 
! mux.

gst-launch filesrc location=a.mov ! queue2 ! qtdemux name=qtd !  
qtd.video_00 ! queue2 ! mp4mux name=mux ! filesink location=a.mp4 
qtd.audio_00 ! queue2 ! mux.

These do not preroll or throw up an error.

Any idea on how to solve this?

Regards,
Deepika