rosbag2video.py
rosbag to video file conversion tool
by Maximilian Laiacker 2020
post@mlaiacker.de
with contributions from Abel Gabor 2019
baquatelle@gmail.com
For use with ROS2 bags, please refer to the foxy branch.
For use with ROS1 bags, please proceed with the instructions below.
ffmpeg is needed and can be installed on Ubuntu with:
sudo apt install ffmpeg
ros and other stuff
sudo apt install python3-roslib python3-sensor-msgs python3-opencv
rosbag2video.py [--fps 25] [--rate 1] [-o outputfile] [-v] [-s] [-t topic] bagfile1 [bagfile2] ...
Converts image sequence(s) in ros bag file(s) to video file(s) with fixed frame rate using ffmpeg
ffmpeg needs to be installed!
--fps Sets FPS value that is passed to ffmpeg
Default is 25.
-h Displays this help.
--ofile (-o) sets output file name.
If no output file name (-o) is given the filename '<prefix><topic>.mp4' is used and default output codec is h264.
Multiple image topics are supported only when -o option is _not_ used.
ffmpeg will guess the format according to given extension.
Compressed and raw image messages are supported with mono8 and bgr8/rgb8/bggr8/rggb8 formats.
--rate (-r) You may slow down or speed up the video.
Default is 1.0, that keeps the original speed.
-s Shows each and every image extracted from the rosbag file (cv_bride is needed).
--topic (-t) Only the images from topic "topic" are used for the video output.
-v Verbose messages are displayed.
--prefix (-p) set a output file name prefix othervise 'bagfile1' is used (if -o is not set).
--start Optional start time in seconds.
--end Optional end time in seconds.
./rosbag2video.py camera_and_state.bag
rosbag2video, by Maximilian Laiacker 2020 and Abel Gabor 2019
############# COMPRESSED IMAGE ######################
/image_raw/compressed with datatype: sensor_msgs/CompressedImage
frame= 77 fps= 13 q=28.0 size= 1280kB time=00:00:00.96 bitrate=10922.2kbits/s speed=0.156x