is there any possibility of unmixing a file? I have use overlay to mix 2 audios, but I want to get back the original first audio. Is there something in pydub that I can use?
sound1 = AudioSegment.from_mp3("/path/to/file1.mp3")
sound2 = AudioSegment.from_mp3("/path/to/file2.mp3")
output = sound1.overlay(sound2, position=5000)
output.export("mixed_sounds.mp3", format="mp3")
The original audio in the sound1 variable has not been modified, so you can use it right away if you like.
If you mean recovering just the audio from sound1 from the exported “mixed_sounds.mp3” file, without acccess to the original data, that is not possible unless you know very specific things (for example if sound2 is silent and you know when sound1 starts and ends)
Related
Some streams have StreamTitle tag set and it changes from time to time. Is that information send only when it changes in the stream? For example in this stream StreamTitle is used to tell the artist and the name of current song:
ffprobe -v error -show_entries format_tags http://st.downtime.fi/sun.mp3
Is the StreamTitle tag exclusive to MP3 streams? Can one have it in Opus streams as well?
Can such information be added to the output file created when recording the stream by ffmpeg for example, to be able to see which song is playing when playing the recording later? Could another tag be used to tell program name which may also alter in time?
I am working on a project that requires sound snippets to be played from MP3 files in a playlist. The files are full songs.
I have tried pygame mixer and I can pass the start time of the file, but I cannot pass the end time that I want the music to stop, or be able to fade-in and fade out the current snippet.
I have looked at the vlc and ffmpeg libraries, but I do not see the functionality I am looking for.
I'm hoping someone may be aware of a library out there that may be able to do what I am trying to accomplish.
I finally figured out how to do exactly what I wanted to do!
In the spirit of helping others I am posting an answer to my own question.
My development environment:
Mac OS Mojave 10.14.6
Python 3.7.4
PyAudio 0.2.11
PyDub 0.23.1
Here it is in it's most rudimentary form:
import pyaudio
from pydub import AudioSegment
# Assign a mp3 source file to the PyDub Audiosegment
mp3 = AudioSegment.from_mp3("path_to_your_mp3_file")
# Specify starting and ending offsets from the beginning of the stream
# then apply a fadein and fadeout. All values are in millisecond (seconds * 1000).
mp3 = mp3[int(43000):int(58000)].fade_in(2000).fade_out(2000)
# In the above example the music will start 43 seconds into the track with a 2 second
# fade-in, and only play for 15 seconds with a 2 second fade-out. If you don't need
# these features, just comment out the line and the full mp3 will play.
# Assign the PyAudio player
player = pyaudio.PyAudio()
# Create the stream from the chosen mp3 file
stream = player.open(format = player.get_format_from_width(mp3.sample_width),
channels = mp3.channels,
rate = mp3.frame_rate,
output = True)
data = mp3.raw_data
while data:
stream.write(data)
data=0
stream.close()
player.terminate()
It isn't in the example above, but there is a way to process the stream and increase/decrease/mute the volume of the music.
One other thing that could be done is to set up a thread to pause the processing (writing) of the stream, which would emulate a pause button in a player.
I am able to use the moviepy library to add a watermark to a section of video. However when I do this it is taking the watermarked segment, and creating a new file with it. I am trying to figure out if it is possible to simply splice in the edited part back into the original video, as moviepy is EXTREMELY slow writing to the disk, so the smaller the segment the better.
I was thinking maybe using shutil?
video = mp.VideoFileClip("C:\\Users\\admin\\Desktop\\Test\\demovideo.mp4").subclip(10,20)
logo = (mp.ImageClip("C:\\Users\\admin\\Desktop\\Watermark\\watermarkpic.png")
.set_duration(20)
.resize(height=20) # if you need to resize...
.margin(right=8, bottom=8, opacity=0) # (optional) logo-border padding
.set_pos(("right","bottom")))
final = mp.CompositeVideoClip([video, logo])
final.write_videofile("C:\\Users\\admin\\Desktop\\output\\demovideo(watermarked).mp4", audio = True, progress_bar = False)
Is there a way to copy the 10 second watermarked snippet back into the original video file? Or is there another library that allows me to do this?
What is slow in your use case is the fact that Moviepy needs to decode and reencode each frame of the movie. If you want speed, I believe there are ways to ask FFMPEG to copy video segments without rencoding.
So you could use ffmpeg to cut the video into 3 subclips (before.mp4/fragment.mp4/after.mp4), only process fragment.mp4, then reconcatenate all clips together with ffmpeg.
The cutting into 3 clips using ffmpeg can be done from moviepy:
https://github.com/Zulko/moviepy/blob/master/moviepy/video/io/ffmpeg_tools.py#L27
However for concatenating everything together you may need to call ffmpeg directly.
I have 2 functions as below:
def select_audio():
os.chdir("/home/norman/songbook")
top1.lower(root)
name=tkFileDialog.askopenfilename()
doit="play " + name
top1.lift(root)
os.system(doit)
def select_video():
os.chdir("/home/norman/Videos")
top2.lower(root)
name=tkFileDialog.askopenfilename()
doit="mpv --fs " + name
top2.lift(root)
os.system(doit)
They are selected from buttons to allow choosing and playing audio files or video files.
They work to some extent.
Videos are in a different directory and at the same level as the audio files.
It doesn't matter which I choose first I see the correct directory so I can play say a video, if after it's finished I choose audio it still shows the video directory.
Similarly if I first choose audio it still shows the audio directory if I select videos.
I have no idea why it does this. I am not an experienced programmer as you can probably tell from the code.
Some suggestions:
Use a raw string to make sure that Python doesn't try to interpret anything following a \ as an escape sequence:
Change os.chdir("/home/norman/whatever") to os.chdir(r"/home/norman/whatever")
It won't solve this problem, but it will avoid you future problems.
For tkFileDialog use the initialdir option:
Change name=tkFileDialog.askopenfilename() to
name=tkFileDialog.askopenfilename(initialdir=r"home/norman/whatever", parent=root)
I'm looking to combine a range of different audio files (mp3) in Python. One of the requirements is that I need to be able to specify a delay at the end of each file. To illustrate, something like:
[file1.mp3--------3 seconds----------][delay---------2 seconds--------][file2.mp3]-------------4 seconds][delay---------2 seconds][file3.mp3----------3 seconds---------]
Does anyone here know of any mp3 libraries that can accomplish this? Python isn't really a necessity here. If it'll be easier in another language, that'll be fine.
I think FFmpeg can do this, given the right arguments. No real need to use a library.
To combine wav or aiff files, you can do something like this: (inspiration from here)
import aifc
def concatenate(*items):
data = []
for item in items:
f = aifc.open(item, 'rb')
data.append([f.getparams(), f.readframes(f.getnframes())])
f.close()
output = aifc.open('output.aif', 'wb')
output.setparams(data[0][0])
for item in data:
output.writeframes(item[1])
output.close()
See the link for the wav format (it's pretty much the same, but with the wave library)
To add silence, I would just make a one second silent file using your favorite audio editor and then concatenate in the proper amount of silence.