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import streamlit as st
from streamlit_lottie import st_lottie
from utils import write_vtt, write_srt
import ffmpeg
import requests
from typing import Iterator
from io import StringIO
import numpy as np
import pathlib
import os
st.set_page_config(page_title="Auto Subtitled Video Generator", page_icon=":movie_camera:", layout="wide")
# Define a function that we can use to load lottie files from a link.
@st.cache(allow_output_mutation=True)
def load_lottieurl(url: str):
r = requests.get(url)
if r.status_code != 200:
return None
return r.json()
APP_DIR = pathlib.Path(__file__).parent.absolute()
LOCAL_DIR = APP_DIR / "local_transcript"
LOCAL_DIR.mkdir(exist_ok=True)
save_dir = LOCAL_DIR / "output"
save_dir.mkdir(exist_ok=True)
col1, col2 = st.columns([1, 3])
with col1:
lottie = load_lottieurl("https://assets6.lottiefiles.com/packages/lf20_cjnxwrkt.json")
st_lottie(lottie)
with col2:
st.write("""
## Auto Subtitled Video Generator
##### ➠ Upload a video file and a transcript as .srt or .vtt file and get a video with subtitles.
##### ➠ Processing time will increase as the video length increases. """)
def getSubs(segments: Iterator[dict], format: str, maxLineWidth: int) -> str:
segmentStream = StringIO()
if format == 'vtt':
write_vtt(segments, file=segmentStream, maxLineWidth=maxLineWidth)
elif format == 'srt':
write_srt(segments, file=segmentStream, maxLineWidth=maxLineWidth)
else:
raise Exception("Unknown format " + format)
segmentStream.seek(0)
return segmentStream.read()
def split_video_audio(uploaded_file):
with open(f"{save_dir}/input.mp4", "wb") as f:
f.write(uploaded_file.read())
audio = ffmpeg.input(f"{save_dir}/input.mp4")
audio = ffmpeg.output(audio, f"{save_dir}/output.wav", acodec="pcm_s16le", ac=1, ar="16k")
ffmpeg.run(audio, overwrite_output=True)
def main():
uploaded_video = st.file_uploader("Upload Video File", type=["mp4", "avi", "mov", "mkv"])
# get the name of the input_file
if uploaded_video is not None:
filename = uploaded_video.name[:-4]
else:
filename = None
transcript_file = st.file_uploader("Upload Transcript File", type=["srt", "vtt"])
if transcript_file is not None:
transcript_name = transcript_file.name
else:
transcript_name = None
if uploaded_video is not None and transcript_file is not None:
if transcript_name[-3:] == "vtt":
with open("uploaded_transcript.vtt", "wb") as f:
f.writelines(transcript_file)
f.close()
with open(os.path.join(os.getcwd(), "uploaded_transcript.vtt"), "rb") as f:
vtt_file = f.read()
if st.button("Generate Video with Subtitles"):
with st.spinner("Generating Subtitled Video"):
split_video_audio(uploaded_video)
video_file = ffmpeg.input(f"{save_dir}/input.mp4")
audio_file = ffmpeg.input(f"{save_dir}/output.wav")
ffmpeg.concat(video_file.filter("subtitles", "uploaded_transcript.vtt"), audio_file, v=1, a=1).output("final.mp4").global_args('-report').run(quiet=True, overwrite_output=True)
video_with_subs = open("final.mp4", "rb")
col3, col4 = st.columns(2)
with col3:
st.video(uploaded_video)
with col4:
st.video(video_with_subs)
st.download_button(label="Download Video with Subtitles",
data=video_with_subs,
file_name=f"{filename}_with_subs.mp4")
elif transcript_name[-3:] == "srt":
with open("uploaded_transcript.srt", "wb") as f:
f.writelines(transcript_file)
f.close()
with open(os.path.join(os.getcwd(), "uploaded_transcript.srt"), "rb") as f:
srt_file = f.read()
if st.button("Generate Video with Subtitles"):
with st.spinner("Generating Subtitled Video"):
split_video_audio(uploaded_video)
video_file = ffmpeg.input(f"{save_dir}/input.mp4")
audio_file = ffmpeg.input(f"{save_dir}/output.wav")
ffmpeg.concat(video_file.filter("subtitles", "uploaded_transcript.srt"), audio_file, v=1, a=1).output("final.mp4").run(quiet=True, overwrite_output=True)
video_with_subs = open("final.mp4", "rb")
col3, col4 = st.columns(2)
with col3:
st.video(uploaded_video)
with col4:
st.video(video_with_subs)
st.download_button(label="Download Video with Subtitles",
data=video_with_subs,
file_name=f"{filename}_with_subs.mp4")
else:
st.error("Please upload a .srt or .vtt file")
else:
st.info("Please upload a video file and a transcript file")
if __name__ == "__main__":
main()
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