我正在开发一个Android应用程序，它将文本转换为相应的视频，我使用Python和Java。视频存储在Android Studio的assets目录中。模型访问asset目录但不读取数据。这是我的代码

#python
import cv2
import numpy as np
import spacy
import nltk
from nltk.corpus import wordnet
from itertools import chain
import os
import time
AssetManager = Python.getPlatform().getApplication().getAssets()
nltk.download('wordnet')
# Load the SpaCy language model
nlp = spacy.load("en_core_web_sm")
# Function to process text and concatenate videos
def process_text_and_generate_video(input_text, asset_manager, context):
word=''
# Tokenize using spacy
doc = nlp(input_text)
# Initialize a dictionary to map POS tags
pos_dict = {"NOUN": "noun", "VERB": "verb", "ADJ": "adj", "ADV": "adv", "PRON": "pron", "ADP": "adp"}
# Array to store video frames
frames = []
# Iterate through spacy's tokenized results
for token in doc:
    word = token.text
    pos_tag = token.pos_
    if pos_tag in pos_dict:
        try:
            # Copy the video file from assets to a temporary directory
          file_path = f"assets/{word}.mp4"
            print(f"Trying to open file: {file_path}")
            with asset_manager.open(file_path) as fd:
              
  temp_file_path = os.path.join(context.getCacheDir(), f"{word}.mp4")
                    with open(temp_file_path, 'wb') as out:
                        out.write(fd.read())
            # Read video frames into a numpy array
            cap = cv2.VideoCapture(temp_file_path)
            ret, frame = cap.read()
            if ret:
                frames.append(frame)
        except Exception as e:
            print(f"Exception occurred: {e}")
    else:
        # Get synonyms of the word
        synonyms = wordnet.synsets(word)
        synonyms = set(chain.from_iterable([word.lemma_names() for word in synonyms]))
        # Check if any synonym has a corresponding video in the directory
        for synonym in synonyms:
            try:
                # Copy the video file from assets to a temporary directory
                file_path = f"assets/{synonym}.mp4"
                print(f"Trying to open file: {file_path}")
                with asset_manager.open(file_path) as fd:
                    temp_file_path = os.path.join(context.getCacheDir(), f"{synonym}.mp4")
                    with open(temp_file_path, 'wb') as out:
                        out.write(fd.read())
                # Read video frames into a numpy array
                cap = cv2.VideoCapture(temp_file_path)
                ret, frame = cap.read()
                if ret:
                    frames.append(frame)
                break
            except Exception as e:
                print(f"Exception occurred: {e}")
# If no videos were found for the word or its synonyms, look for videos that match each letter of the word
if not frames:
    for letter in word.lower():  # Convert to lowercase because file names are in lowercase.
        try:
            # Copy the video file from assets to a temporary directory
            file_path = f"assets/{letter}.mp4"
            print(f"Trying to open file: {file_path}")
            with asset_manager.open(file_path) as fd:
                temp_file_path = os.path.join(context.getCacheDir(), f"{letter}.mp4")
                with open(temp_file_path, 'wb') as out:
                    out.write(fd.read())
            # Read video frames into a numpy array
            cap = cv2.VideoCapture(temp_file_path)
            ret, frame = cap.read()
            if ret:
                frames.append(frame)
        except Exception as e:
            print(f"Exception occurred: {e}")
# If no videos were found at all, print a message and return None.
if not frames:
    print("No match found")
    return None
# Concatenate video frames.
final_clip = np.concatenate(frames)
# Export the concatenated video using cv2.VideoWriter().
fourcc = cv2.VideoWriter_fourcc(*'MP4V')
height, width, _ = final_clip[0].shape  # get the width and height of the first frame
output_file_path = os.path.join(context.getFilesDir(), 'my_concatenation.mp4')
out = cv2.VideoWriter(output_file_path, fourcc, 30.0, (width, height))
for frame in final_clip:
    out.write(frame)
out.release()
time.sleep(1)
return output_file_path if os.path.exists(output_file_path) else None

字符串
...java

package com.example.myapplication_fyppsl;
import android.content.Context;
import android.os.AsyncTask;
import android.widget.MediaController;
import android.widget.Toast;
import android.widget.VideoView;
import com.chaquo.python.PyObject;
import com.chaquo.python.Python;
import java.io.IOException;
public class VideoProcessingTask extends AsyncTask<String, Void, String> {
    private VideoView videoView;
    private Context context;
    public VideoProcessingTask(VideoView videoView,Context context) {
        this.videoView = videoView;
        this.context = context;
    }
    @Override
    protected String doInBackground(String... strings) {
        String input = strings[0];
        Python py = Python.getInstance();
        PyObject pyf = py.getModule("displayAnimation");
        try {
            String[] files = context.getAssets().list("");
            for(String name : files) {
                System.out.println("File : " + name);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        // pass the AssetManager and get back the path of created file.
        PyObject obj = pyf.callAttr("process_text_and_generate_video", input, context.getAssets(), context);
        // Check if obj is null before calling toString()
        return obj == null ? null : obj.toString();
    }
    @Override
    protected void onPostExecute(String result) {
        super.onPostExecute(result);
        // Check if result is None before trying to set the video path
        if (result == null) {
            Toast.makeText(context, "No videos found for your input.", Toast.LENGTH_SHORT).show();
            return;
        }
        // Set the path of the Video or URI from result of doInBackground method.
        videoView.setVideoPath(result);
        // Create a MediaController and attach it to the VideoView
        MediaController mediaController = new MediaController(context);
        mediaController.setAnchorView(videoView);
        // Attach the MediaController to the VideoView
        videoView.setMediaController(mediaController);
        // Start the VideoView
        videoView.start();
    }
}

型
我试了很多方法来找出出了什么问题，但我仍然无法找到它。
1.检查所有权限
1.路径
1.视频格式
1.视频标题

1. Gradle配置