# --- 1. Read HDF5 ---

import h5py
import segyio
import numpy as np

# --- 1. Read HDF5 ---
with h5py.File('my_seismic_input.h5', 'r') as hf:
    # Assuming data is in '/traces' and headers in '/trace_headers'
    traces = hf['/traces'][:] # Read all traces into memory (adjust for large files)
    headers = hf['/trace_headers'][:] # Read headers (structured array)
    # Extract metadata as needed

# --- 2. Prepare for SEG-Y ---
num_traces, num_samples = traces.shape
# Create a blank SEG-Y file structure
with segyio.create('output.segy', (num_traces, num_samples)) as f:
    # --- 3. Write Headers (Simplified) ---
    f.text[0] = b'Converted from HDF5' # Example text header
    # Map headers to binary_header (complex mapping required)
    # f.binary_header.trace_count = num_traces

    # --- 4. Write Traces ---
    for i in range(num_traces):
        f.trace[i] = traces[i, :] # Write trace data
        # Map headers[i] to f.header[i] (requires careful field mapping)
        # e.g., f.header[i][segyio.TraceField.TRACENO] = i

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