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• Demuxing RTSP stream using GStreamer and sending to FFmpeg using MPEG-TS via TCP

  25 janvier 2023, par Brian Schrameck

  I am trying to run a pipeline that will read an h264/aac stream from RTSP and push it to an FFmpeg TCP socket (that FFmpeg instance will re-publish as another RTSP stream, I know it's odd). Requirements :

  


  

  • The RTSP client at the start of this pipeline MUST be GStreamer (i.e. I can't use FFmpeg to read the RTSP stream, only to publish).

  


  • The RTSP client at the end of the pipeline MUST be FFmpeg.

  


  


  My pipeline works for video but adding audio has been a challenge. Here's the current GStreamer pipeline :

  


  gst-launch-1.0 rtspsrc location=rtsp://{camIp}/live name=cam \
  cam. ! rtph264depay ! h264parse ! queue ! mux. \
  cam. ! rtpmp4gdepay ! aacparse ! queue ! mux. \
  mpegtsmux name=mux ! tcpclientsink host=${ip} port=${port} sync=false


  


  Then, FFmpeg is listening like this :

  


  ffmpeg -f mpegts -i tcp://${ip}:${port} \
  -rtsp_transport tcp -vcodec copy -an -f rtsp rtsp://${rtspIp}:${rtspPort}/d8a5bb19e63326d7


  


  This pipeline works if I remove the audio by removing cam. ! rtpmp4gdepay ! aacparse ! queue ! mux. in my GStreamer chain. However, with audio added FFmpeg won't publish the data to my RTSP client ; FFmpeg starts probing the GStreamer output and then exits for no apparent reason.

  


• 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.

  


• How to setup ffmpeg in docker container

  15 novembre 2022, par TorR

  I want to compress the video from project directory using ffmpeg in python

  


  the video is saved from cv2.VideoCapture(rtsp_url)

  


  Normally it run without problem in my local machine, but when I dockerize my app it seems docker container can't recognize ffmpeg or I missed something.

  


  def compress(name):
    with open(name) as f:
        output = name[0:-4] + "-f"+ ".mp4"
        input = name
        subprocess.run('ffmpeg -i ' + input + ' -vcodec libx264 ' + output)

video = cv2.VideoCapture(rtsp_url) # This is where the video comming from
fileName = saveToProjDir(video) # Save the video to project directory and return the name
compress(fileName) # Compress the video



  


  It throws exception

  


  
Exception in thread Thread-8 (compress):
Traceback (most recent call last):
  File "/usr/local/lib/python3.11/threading.py", line 1038, in _bootstrap_inner
    self.run()
  File "/usr/local/lib/python3.11/threading.py", line 975, in run
    self._target(*self._args, **self._kwargs)
  File "/app/main.py", line 59, in compress
    subprocess.run('ffmpeg -i ' + input + ' -vcodec libx264 ' + output)
  File "/usr/local/lib/python3.11/subprocess.py", line 546, in run
    with Popen(*popenargs, **kwargs) as process:
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/subprocess.py", line 1022, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "/usr/local/lib/python3.11/subprocess.py", line 1899, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'ffmpeg -i cam1_2022-11-15125845.avi -vcodec libx264 cam1_2022-11-15125845-f.mp4'



  


  This is how I docker my python app.

  


  
FROM python:3.11.0

WORKDIR /app/

ENV VIRTUAL_ENV = /env
RUN python3 -m venv $VIRTUAL_ENV
ENV PATH="$VIRTUAL_ENV/bin:$PATH"

COPY requirements.txt .

RUN pip install -r requirements.txt
RUN apt-get -y update
RUN apt-get install ffmpeg libsm6 libxext6  -y

ADD main.py .
CMD ["python","/app/main.py"]