Recherche avancée

Sur d’autres sites (4599)

• Get middle line from the output of a command

  14 décembre 2022, par Kishore T

  The following command list the duration of I-frames present in a video file.

  


  ffprobe -i ./test.mp4 -v quiet -skip_frame nokey -select_streams v:0 -of flat -show_entries frame=pkt_pts_time | awk -F'=' '{gsub(/"/, "", $NF); print $NF}'


  


  I'm trying to get the duration of I-frame that is in middle. The output of the above command will be like

  


  0.066667
2.066667
4.066667
9.066667
14.066667
19.066667
24.066667


  


  How do I get the middle value ? Here, I would like to get 9.066667 as the result. If the number of lines is even (say I've 2 values), I need to get the 1st value.

  


  I tried using wc to get the number of lines and sed to print the middle line. But, this straightforward solution required me to run the command twice. I tried piping the command, but I didn't find any solution for storing the value in a variable (from the wc command) and using the same in another command (sed command) while retaining the piped output.

  


• Docker fails to import FFMPEG or does not find it

  8 décembre 2022, par stxss

  So I'm trying to create a telegram bot using python and ffmpeg and I want to deploy it to a server through a docker image.

  


  I already looked through a lot of resources as I've been looking at the same 5 lines of code for the past three days and neither discords, stack overflow previous answers have helped me.

  


  This is my dockerfile where half of the program works (apart from the ffmpeg functionality).

  


  FROM python:3.9

RUN mkdir /app
WORKDIR /app

COPY requirements.txt ./
RUN pip3 install --no-cache-dir --user -r requirements.txt

COPY . .

ENTRYPOINT ["/usr/bin/python3", "./app.py" ]


  


  With this code I get the following error when trying to use a function that invokes ffmpeg functionality.

  


  Traceback (most recent call last):
File "/root/.local/lib/python3.9/site-packages/pyrogram/dispatcher.py", line 240, in handler_worker
await handler.callback(self.client, *args)
File "/app/./app.py", line 274, in choice_from_inline
await helpers.trim_file(trim_length, "audio", chat_id_for_join.strip())
File "/app/helpers.py", line 53, in trim_file
output = ffmpeg.output(
File "/root/.local/lib/python3.9/site-packages/ffmpeg/_run.py", line 313, in run
process = run_async(
File "/root/.local/lib/python3.9/site-packages/ffmpeg/_run.py", line 284, in run_async
return subprocess.Popen(
File "/usr/lib/python3.9/subprocess.py", line 951, in __init__
self._execute_child(args, executable, preexec_fn, close_fds,
File "/usr/lib/python3.9/subprocess.py", line 1823, in _execute_child
raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'ffmpeg'


  


  Another issue is that when changing the ENTRYPOINT (or using CMD) to ["python3", "./app.py" ] everything works well locally but as soon as I try to deploy, the deployment/docker container just doesn't work or crash because I get the error of ModuleNotFoundError: No module named 'ffmpeg'.

  


  I have already tried setting up different ENV PATH and ENV PYTHONPATH, does absolutely nothing.
I have tried to use COPY --from=jrottenberg/ffmpeg /usr/local ./ and it also doesn't work.
I have tried to explicitly use RUN apt-get install -y ffmpeg and similar commands, pip, pip3, etc.. it just doesn't work.

  


  I tried to use the copy command to access the /root/.local/lib/python3.9/site-packages/ffmpeg/_run.py but I either get a permission denied or a file does not exist error.

  


  I am also using the ffmpeg-python wrapper and am using a windows machine if that's of any importance.

  


  At this point I'm contemplating of finding another way of implementing the functionality I want without using ffmpeg.

  


  I think I added everything I had, if needed more I can provide.

  


• subprocess.call can't find file/shutil.which failed in pycharm

  4 décembre 2022, par Percy Yang

  I am trying to transform a mp3 to a wav file in pycharm using subprocess

  


  import subprocess
subprocess.call(['ffmpeg', '-i','test.mp3','test.wav'])


  


  It returns error of not finding file, so I change the 'ffmpeg' to its path on my pc and it work.

  


  The problem is that I am making an app and others might install ffpmeg on other's location (since it is download with zip and can be unzip at any place), but I don't know how to get its full path.

  


  I tried using os module

  


  import os
print(os.path('ffmpeg.exe'))


  


  but it seems like it is not able to get the path of exe

  


  Traceback (most recent call last):&#xA;  File "C:\Users\Percy\PycharmProjects\APP\test3.py", line 8, in <module>&#xA;    print(os.path(&#x27;ffmpeg.exe&#x27;))&#xA;TypeError: &#x27;module&#x27; object is not callable&#xA;</module>

  


  I also tried shutil module

  


  import shutil
print(shutil.which('ffmpeg'))
print(shutil.which('ffmpeg.exe'))


  


  but it returns 2 None (prob wrong cause I am 100% sure I have installed ffmpeg)

  


  None
None


  


  I want to ask if there is any way to get the full path of ffmpeg in pycharm or any method that I can make ffmpeg install in designated path with the app when it is downloaded by users