Run tag detector with .mp4 video

[Mahroo]

Hi, thanks for your valuable work. 
I want to run a command similar to this:
roslaunch tagslam sync_and_detect.launch bag:=`rospack find tagslam`/example/example.bag

however, instead of example.bag I have a .mp4 video (colorful) which I converted it to the .bag file by following steps here. When I run the original example I see the information on frames and apriltags, however, when I run the same command with a new .bag file I get nothing. I attached the screenshot of my terminal. 

That would be great if you can help me with this issue. 

Best, 

Mahroo

[Bernd Pfrommer]

The issue lies most likely with the launch file you are using to start sync_and_detect.

Please post your launch file, and post the output of

rosbag info name_of_the_bag_file.bag

[Mahroo]

Thanks for your reply, the problem was with the bag file and now it's working as expected.