Reading mcap files in a script

[samialperen]

I have recorded mcap files with ros2 bag record as follows ros2 bag record -s mcap /my_topic

I have verified that on Foxglove, I can read these mcap files without any problem. However, when I try to do it in a python script, it does not work.
Here is my script:

# Reading from a MCAP file
from mcap_ros2.reader import read_ros2_messages

for msg in read_ros2_messages("my_recording.mcap"):
    print(f"{msg.channel.topic}: f{msg.ros_msg}")

I am getting the following error:

  File "/usr/local/lib/python3.10/dist-packages/mcap_ros2/reader.py", line 67, in read_ros2_messages
    reader = make_reader(fd, decoder_factories=[DecoderFactory()])
  File "/usr/local/lib/python3.10/dist-packages/mcap/reader.py", line 224, in make_reader
    return SeekingReader(
  File "/usr/local/lib/python3.10/dist-packages/mcap/reader.py", line 252, in __init__
    read_magic(ReadDataStream(stream, calculate_crc=False))
  File "/usr/local/lib/python3.10/dist-packages/mcap/stream_reader.py", line 92, in read_magic
    magic = struct.unpack("<8B", stream.read(MAGIC_SIZE))
  File "/usr/local/lib/python3.10/dist-packages/mcap/data_stream.py", line 31, in read
    raise EndOfFile()
mcap.exceptions.EndOfFile

I feel like I am missing something very basic. Can someone help me out with this? Thank you in advance! :)

[samialperen]

Edit: False alarm --> corrupted bag file was the reason, closing the discussion