Change or update audio start with video texture start frame I am looking for a way to link the video texture start frame with the audio start frame in the video sequencer. 

My intention is as follows 


Import multiple movies as Image plane in Blender
Then import the respective audio track in blender video sequencer. Align the audio track by matching the start frame in the video texture and video sequencer. This is a manual process. But I am ok with it. I am not sure how to link the start frame of video with the start frame of audio. - This is what I need.
Then animate camera pan and zoom and update the video start texture according to the animation manually.
Then I expect the audio start frame to be adjusted automatically - This is what I want to happen


I searched google and found that drivers in blender can be used for these purposes. But soon realized that there are no drivers for both the options. I also tried to create a custom property. But had no success.

Please suggest
Here is a workaround solution

A custom property, named "audio" is added to the movie texture, with a value of the soundstrip name.  Every time the script is run it updates the audio strip, pointed to by the audio key, to have the same frame_start as the tex.

import bpy

context = bpy.context
scene = context.scene
sequences = scene.sequence_editor.sequences_all
# all the textures with audio custom prop
textures = [t for t in bpy.data.textures if "audio" in t.keys()]

for t in textures:
    audio_strip = sequences.get(t["audio"])
    if audio_strip:
        audio_strip.frame_start = t.image_user.frame_start