↓Skip to main content
  1. Posts/

Install pyav inside Ubuntu Docker

··491 words·3 mins·
Table of Contents

Building a usable Docker image with all the packages living peacefully is hard. Here is how to install pyav using Docker.

Environment:

  • system: Ubuntu 18.04
  • python: 3.6.9
  • pip: 20.3

change apt source
#

First, a not-necessary but huge time saver is to change the apt source used. Here in China, the official debian apt source is really slow. We can change it to aliyun or tsinghua. Their access speed is quite high in China.

Here is the relevant snippet to change apt resource.

ARG APT_FILE=/etc/apt/sources.list

# change apt repo source
RUN mv $APT_FILE $APT_FILE.bak && \
  touch $APT_FILE && \
  echo  "deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse" >> $APT_FILE && \
  echo "deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse" >> $APT_FILE && \
  echo "deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse" >> $APT_FILE && \
  echo "deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse" >> $APT_FILE && \
  echo "deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse" >> $APT_FILE && \
  echo "deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse" >> $APT_FILE && \
  echo "deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse" >> $APT_FILE && \
  echo "deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse" >> $APT_FILE && \
  echo "deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse" >> $APT_FILE && \
  echo "deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse" >> $APT_FILE

Install dependency packages
#

Second, we need to install necessary packages:

RUN apt-get update && apt-get install -y python-dev pkg-config

Note that installation instructions given in pyav doc here does not work. It seems that the installed version of libavformat and other libs are too old. If we use that, we will see error message like this (also reported here and here):

Error
building 'av.codec.codec' extension
creating build/temp.linux-x86_64-3.6/src/av/codec
x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -I/usr/include/python3.6m -Iinclude -I/usr/include/x86_64-linux-gnu -Ibuild/temp.linux-x86_64-3.6/include -I/usr/include/python3.6m -Ibuild/temp.linux-x86_64-3.6/include -c src/av/codec/codec.c -o build/temp.linux-x86_64-3.6/src/av/codec/codec.o
src/av/codec/codec.c: In function ‘__pyx_pymod_exec_codec’:
src/av/codec/codec.c:6061:36: error: ‘AV_CODEC_CAP_HARDWARE’ undeclared (first use in this function); did you mean ‘AV_CODEC_CAP_DR1’?
    __pyx_t_7 = __Pyx_PyInt_From_int(AV_CODEC_CAP_HARDWARE); if (unlikely(!__pyx_t_7)) __PYX_ERR(0, 124, __pyx_L1_error)
                                    ^~~~~~~~~~~~~~~~~~~~~
                                    AV_CODEC_CAP_DR1
src/av/codec/codec.c:6061:36: note: each undeclared identifier is reported only once for each function it appears in
src/av/codec/codec.c:6082:36: error: ‘AV_CODEC_CAP_HYBRID’ undeclared (first use in this function); did you mean ‘AV_CODEC_CAP_DR1’?
    __pyx_t_7 = __Pyx_PyInt_From_int(AV_CODEC_CAP_HYBRID); if (unlikely(!__pyx_t_7)) __PYX_ERR(0, 128, __pyx_L1_error)
                                    ^~~~~~~~~~~~~~~~~~~
                                    AV_CODEC_CAP_DR1
error: command 'x86_64-linux-gnu-gcc' failed with exit status 1

----------------------------------------
Failed building wheel for av
Running setup.py clean for av
Failed to build av

Add apt source for libav
#

Instead, we need to install the ffmpeg-4 apt source:

# add a new ffmpeg source, the builtin is too old
RUN apt-get update && apt-get install -y software-properties-common &&\
    add-apt-repository -y ppa:jonathonf/ffmpeg-4

After that, install the dependency lib for pyav:

RUN apt-get update && apt-get install -y \
    ffmpeg \
    libavformat-dev \
    libavcodec-dev \
    libavdevice-dev \
    libavutil-dev \
    libswscale-dev \
    libswresample-dev \
    libavfilter-dev

Finally, use pip to install pyav, it should be fine to install:

RUN pip install  -i https://pypi.tuna.tsinghua.edu.cn/simple av

Ref
#

Related

Install Python3 in Ubuntu Docker
·176 words·1 min
How to Download Files from Google Cloud Storage in the Databricks Workspace Notebook
··551 words·3 mins
PyAV for video processing
·270 words·2 mins