ffmpeg-python | Python bindings for FFmpeg - with complex filtering support | Video Utils library
kandi X-RAY | ffmpeg-python Summary
kandi X-RAY | ffmpeg-python Summary
There are tons of Python FFmpeg wrappers out there but they seem to lack complex filter support. ffmpeg-python works well for simple as well as complex signal graphs.
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Top functions reviewed by kandi - BETA
- Render a graphviz graph
- Sort a graph
- Given an upstream node and a graph return all the outgoing edges
- Get the color for a node
- Split an audio file using ffmpeg
- Create a directory
- Apply a filter to a stream
- Get the chunk times in a file
- Run ffmpeg asynchronously
- Wrapper for ffmpeg
- Compile ffmpeg
- Return the arguments for a given stream specification
- Describe a audio file
- Apply color channelmixer
- Read a single frame as JPEG
- Set a setpts expression
- Auxiliary function that yields tqdm progress bar
- Watch the progress of the progress bar
- Generate a thumbnail
- Apply zoomans to stream
- Apply hue filter
- Crop a stream
- Create an input node
- Run ffprobe on a file
- Process a single frame
- Concatenate streams together
ffmpeg-python Key Features
ffmpeg-python Examples and Code Snippets
Lines of Code : 42License : Permissive (Apache-2.0)
Copystream = ffmpeg.input('dummy.mp4')
stream = ffmpeg.filter(stream, 'fps', fps=25, round='up')
stream = ffmpeg.output(stream, 'dummy2.mp4')
ffmpeg.run(stream)
(
ffmpeg
.input('dummy.mp4')
.filter('fps', fps=25, round='up')
.output('dum process1 = (
ffmpeg
.input(in_filename)
.output('pipe:', format='rawvideo', pix_fmt='rgb24', vframes=8)
.run_async(pipe_stdout=True)
)
process2 = (
ffmpeg
.input('pipe:', format='rawvideo', pix_fmt='rgb24', s='{}x{}'.format(w 
License : No LicenseCopyfrom ffmpeg import video
# 输入视频
input_file = "demo.mp4"
# 输出视频
out_file = "demo_out.mp4"
# 图片列表
img_data = [
{
"img": "demo1.png",
"x": "",
"y": "",
"str_time": "5",
"end_time": " '''Example streaming ffmpeg numpy processing.
Demonstrates using ffmpeg to decode video input, process the frames in
python, and then encode video output using ffmpeg.
This example uses two ffmpeg processes - one to decode the input video
and one t #!/usr/bin/env python
from __future__ import unicode_literals, print_function
from tqdm import tqdm
import argparse
import contextlib
import ffmpeg
import gevent
import gevent.monkey; gevent.monkey.patch_all(thread=False)
import os
import shutil
impo #!/usr/bin/env python
from __future__ import unicode_literals
import argparse
import errno
import ffmpeg
import logging
import os
import re
import subprocess
import sys
logging.basicConfig(level=logging.INFO, format='%(message)s')
logger = logging ffmpeg -i pvp2.mp4 -vsync cfr pvp2cfr2.mp4
ffmpeg -i pvp2cfr2.mp4 -filter:v fps=30 pvp2cfr30.mp4
...
Metadata:
handler_name : VideoHandler
vendor_id : [0][0][0][0]
Stream #0:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 159 kb/s (default)
Metadata:
handler_name : Soffmpeg \
-y \
-i './SARS/SARS.mp3' \
-pattern_type glob -framerate 0.1 -i './SARS/*.jpg' \
-vf scale=size=hd1080:force_original_aspect_ratio=increase \
'./SARS/output.mp4'
pip install ffmpegio-core
process = ffmpeg.run_async(stream, cmd=APPLICATION, pipe_stdin=True, overwrite_output=True, quiet=True)
process.stdin.write('q'.encode("GBK"))
process.communicate()
process.wait()
Community Discussions
Trending Discussions on ffmpeg-python
QUESTION
I am trying to open a video and using python get a frame array with frame by frame for post-processing.
I am in android termux, I have ffmpeg and opencv2 installed with python3.
When I try to open the video with
...ANSWER
Answered 2022-Apr-08 at 18:37I ended up using ffmpeg instead of opencv. Turns out opencv can't handle vfr mp4 on android and it only supports a very limited set of .avi.
I was able to use a ffmpeg filter and re-encode the video to a cfr.
I used a 2 pass transformation to make it a constant 30fps video.
QUESTION
I am developing an Electron application. In this application, I am spawning a Python process with a file's path as an argument, and the file itself is then passed to ffmpeg (through the ffmpeg-python module) and then goes through some Tensorflow functions.
I am trying to handle the case in which the user closes the Electron app while the whole background process is going. From my tests though, it seems like ffmpeg's process stays up no matter what. I'm on Windows and I'm looking at the task manager and I'm not sure what's going on: when closing the Electron app's window, sometimes ffmpeg.exe will be a single process, some other times it will stay in an Electron processes group.
I have noticed that if I kill Electron's process through closing the window, the python process will also close once ffmpeg has done its work, so I guess this is half-working. The problem is, ffmpeg is doing intensive stuff and if the user needs to close the window, then the ffmpeg process also NEEDS to be killed. But I can't achieve that in any way.
I have tried a couple things, so I'll paste some code:
main.js
ANSWER
Answered 2022-Apr-03 at 08:49Alright, I was finally able to fix this! Since ffmpeg-python is just a collection of bindings for good old ffmpeg, the executable itself is still at the core of the module. This also means that when ffmpeg is running, a screen similar to this:
QUESTION
I'd like to achieve this result (to place a text with gradint or whatever picture-fill on top of a video): So I decided to make a picture of gradient: and then with chroma-key technique transform it to this (with transparent background): and then place it over the video.
Here is the code with ffmpeg-python:
ANSWER
Answered 2022-Feb-12 at 13:46We may draw the text on black background, and use alphamerge for creating transparent background with colored gradient text.
Then we can overlay the gradient (with the transparent background) on the input video.
I don't know if my suggested solution is the most elegant, but it is not lower the brightness of the gradient picture.
The suggested solution applies the following stages:
- Define synthetic black video source (1 frame).
- Draw white text on the black video frame.
- Add the "white text on black background" as alpha channel of the gradient image.
Only the white text is opaque, and the black background is fully transparent. - Overlay the above frame over the video.
Start by creating synthetic yellow video file (with sine audio) for testing:
QUESTION
I'm trying to apply a custom python function on every frame of a video, and create the video with modified frames as output. My input video is a mkv file, with variable framerate, and I'd like to get the same thing as output, so one frame in the input matches one in the output at the exact same time.
I tried to use this example of ffmpeg-python. However, it seems that the timestamp info are lost in the pipes. The output video has 689 frames when the input only has 300 (the durations also aren't a match, with 27s vs 11s for the input).
I also tried to first process each frame in my video and save the transformed version as PNGs. Then I "masked" the input video with the processed frames. This seems to be better because the output video has the same 11s duration than the input, but the frame count doesn't match (313 vs 300).
Code for the python-ffmpeg solution:
...ANSWER
Answered 2022-Feb-18 at 11:30I'll answer my own question, as I've been able to solve the issue with the help of kesh in the comments.
There are basically two things:
vsync passthroughis required for the input video, to keep the number of frames- another external tool (MKVToolNix) has to be used twice to extract timestamps from the initial video and apply them to the output
Below is the relevant code to perform the whole operation using python and subprocess. You can use the following line on both input and output video to check that the timestamps are indeed the same for each frame: ffprobe -show_entries packet=pts_time,duration_time,stream_index video.mkv
QUESTION
How can I use multiple map values for different resolutions in ffmpeg-python?
...ANSWER
Answered 2021-Sep-23 at 11:17you can give multiple map values in ffmpeg-python like:
QUESTION
I kinda figured out, the problem needs to deal with apache mpm event... When I send my request on the first client, my script is getting executed linear. When I send my request from the second client, he is literally starting at that point in the code where the last request currently is. So that might be a problem with shared memory between those threads, but I'm not an apache professional, maybe somebody has an idea?
I used apache mpm prefork before, so every request is getting his own process and own memory etc., but there was a problem reading jpg files with that one and it worked after I changed apache to mpm event, see the following: https://github.com/python-pillow/Pillow/issues/5834#issue-comment-box
Inside my VM (running same apache version with mpm event) everything is working fine.
I've got a python script with flask running via wsgi on an apache2 webserver. Inside of that script I got following lines (458-461):
...ANSWER
Answered 2021-Dec-04 at 15:39Okay, for the love of God Im done... needed 4 days for that **** to find out, I had an apache mod activated (fcgid) which literally assign every single line of ur code to a single thread... so I deactivated that one and now its working without any issues...
So in short - what I did:
QUESTION
I am using FFmpeg-python bindings for using FFmpeg. I have to take input from x11grab, for which I already have an equivalent command in shell i.e,
ffmpeg -nostdin -hide_banner -nostats -loglevel panic -video_size 1920x1080 -r 60 -framerate 30 -f x11grab -i :1 -f alsa -ac 2 -i pulse -preset fast -pix_fmt yuv420p file.mkv &
I have gone through docs of FFmpeg-Python to create an equivalent command, however, I could not find any example of x11grab in the documentation.
I wanted to use a binding to make the code more readable, the command works with subprocess.call() / os.system()
...ANSWER
Answered 2021-Nov-28 at 20:07The syntax resembles the following code sample:
QUESTION
I'm using ffmpeg-python. I would like to change the sample rate of the audio file.
In ffmpeg-, it seems that you can change the sample rate as follows.
...ANSWER
Answered 2021-Nov-26 at 15:57I soleved.
I can set **kwargs like this.
QUESTION
I'm using ffmpeg-python to burn an SRT into a video file. My code looks something like this:
...ANSWER
Answered 2021-Oct-25 at 21:09It looks like fonts_dir should include the font file name.
Instead of fonts_dir = "fonts-main/apache", try:
QUESTION
I have a ".ts" file. It is the baseband frame of a DVBS signal which have been recorded. It has some Programs and streams. I use FFmpeg to reconstruct the streams. When I use FFmpeg, this context is shown which contains service_name. How I can export a list of Programs (Not streams) and service_names? ffmpeg.exe -i '.\log_dvbs.ts'
...ANSWER
Answered 2021-Oct-08 at 16:21Using ffprobe:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install ffmpeg-python
The latest version of ffmpeg-python can be acquired via a typical pip install:.
Convert video to numpy array
Generate thumbnail for video
Read raw PCM audio via pipe
JupyterLab/Notebook stream editor
Tensorflow/DeepDream streaming
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