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• ffmpeg : Make output file duration that of the file with the longest length [closed]

  27 février 2024, par losercantcode

  I'm going crazy trying to figure this out.

  


  Essentially I'm trying to apply sidechain compression using ffmpeg (for the sake of speed and automation). a2.mp3 in this example is the full length track and a1.wav is a short 5 second, spoken-word clip. The code currently applies the sidechain compression well, but the output file is only that of the spoken-word clips length, so 5 seconds. Is it at all possible to make the output match that of a2.mp3's length instead ? Switching around the input order is not something that's possible as it'll apply the compression to the incorrect track.

  


  Essentially, i'm trying to make it so i'm just layering the spoken-word file on top of the audio track without having to pre-pad the file. I'd rather, if it's possible, this just happen with one block of code within the in one program. I'm interested to see if this is at all possible within ffmpeg.

  


  ffmpeg -i a2.mp3 -i a1.wav -filter_complex "[1:a]asplit=2[sc][mix];[0:a][sc]sidechaincompress=threshold=0.000976563:ratio=10:level_sc=0.015625:release=100:attack=10[compr];[compr][mix]amix=duration=longest[aout]" -map "[aout]" output.wav


  


  a1.wav is mon, a2.mp3 is stereo.

  


  Attempted to implement amix=duration=longest to no avail. Research similar problems on the Stack Exchange that gave unrelated answers.

  


• Websocket connection in Docker

  22 avril 2024, par Akhil Varghese

  I have a Node.js app that takes an RTSP URL as input and provide a jsmpeg websocket stream as output. The focus of app is to generate a web compatible stream from an RTSP stream, and I have acheived this using a package rtsp-relay.
The app is working fine in locally.
But after dockerizing the app, I am not receiving the output stream. The stream is getting terminated.

  


  The log is


  


  The Dockerfile is :
I am building the ffmpeg from source in docker.

  


  
# Install necessary packages
RUN apt-get update && \
    DEBIAN_FRONTEND=noninteractive apt-get install -yq \
    autoconf \
    automake \
    build-essential \
    cmake \
    git \
    libass-dev \
    libfreetype6-dev \
    libgnutls28-dev \
    libmp3lame-dev \
    libsdl2-dev \
    libtool \
    libva-dev \
    libvdpau-dev \
    libvorbis-dev \
    libxcb1-dev \
    libxcb-shm0-dev \
    libxcb-xfixes0-dev \
    meson \
    ninja-build \
    pkg-config \
    texinfo \
    wget \
    yasm \
    zlib1g-dev \
    libunistring-dev \
    libaom-dev \
    libdav1d-dev \
    libnuma-dev \
    libopus-dev && \
    rm -rf /var/lib/apt/lists/*

# Create directories
RUN mkdir -p /ffmpeg_sources /ffmpeg_build /bin
RUN apt-get update
RUN  apt-get install -y nasm
RUN  apt-get install -y yasm

# Build and install NASM
WORKDIR /ffmpeg_sources
RUN wget https://www.nasm.us/pub/nasm/releasebuilds/2.16.01/nasm-2.16.01.tar.bz2 && \
    tar xjvf nasm-2.16.01.tar.bz2 && \
    cd nasm-2.16.01 && \
    ./autogen.sh && \
    ./configure --prefix="/ffmpeg_build" --bindir="/bin" && \
    make && \
    make install

# Build and install x264
RUN apt-get update
RUN apt-get install -y libx264-dev


# Build and install x265
RUN apt-get install -y libx265-dev libnuma-dev

# Build and install libvpx
RUN git clone --depth 1 https://chromium.googlesource.com/webm/libvpx.git && \
    cd libvpx && \
    ./configure --prefix="/ffmpeg_build" --disable-examples --disable-unit-tests --enable-vp9-highbitdepth --as=yasm && \
    make && \
    make install

# Build and install fdk-aac
RUN git clone --depth 1 https://github.com/mstorsjo/fdk-aac && \
    cd fdk-aac && \
    autoreconf -fiv && \
    ./configure --prefix="/ffmpeg_build" --disable-shared && \
    make && \
    make install

# Build and install opus
RUN git clone --depth 1 https://github.com/xiph/opus.git && \
    cd opus && \
    ./autogen.sh && \
    ./configure --prefix="/ffmpeg_build" --disable-shared && \
    make && \
    make install

# Build and install SVT-AV1
RUN git clone --depth=1 https://gitlab.com/AOMediaCodec/SVT-AV1.git && \
    cd SVT-AV1 && \
    cd Build && \
    cmake .. -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Release && \
    make && \
    make install


# Build and install dav1d
RUN git clone --depth 1 https://code.videolan.org/videolan/dav1d.git && \
    mkdir -p dav1d/build && \
    cd dav1d/build && \
    meson setup -Denable_tools=false -Denable_tests=false --default-library=static .. --prefix "/ffmpeg_build" --libdir="/ffmpeg_build/lib" && \
    ninja && \
    ninja install

# Build and install ffmpeg
RUN wget -O ffmpeg-snapshot.tar.bz2 https://ffmpeg.org/releases/ffmpeg-snapshot.tar.bz2 && \
    tar xjvf ffmpeg-snapshot.tar.bz2 && \
    cd ffmpeg && \
    ./configure \
      --prefix="/ffmpeg_build" \
      --pkg-config-flags="--static" \
      --extra-cflags="-I/ffmpeg_build/include" \
      --extra-ldflags="-L/ffmpeg_build/lib" \
      --extra-libs="-lpthread -lm" \
      --ld="g++" \
      --bindir="/bin" \
      --enable-gpl \
      --enable-gnutls \
      --enable-libaom \
      --enable-libass \
      --enable-libfdk-aac \
      --enable-libfreetype \
      --enable-libmp3lame \
      --enable-libopus \
      --enable-libsvtav1 \
      --enable-libdav1d \
      --enable-libvorbis \
      --enable-libvpx \
      --enable-libx264 \
      --enable-libx265 \
      --enable-nonfree \
      --extra-ldflags="-lm -lstdc++ -L/ffmpeg_build/lib -Wl,-rpath,/ffmpeg_build/lib" \
      --extra-cflags="-I/ffmpeg_build/include" \
      --extra-libs="-lpthread -lm -lstdc++" && \
    make && \
    make install && \
    hash -r

# Update PATH
ENV PATH="/ffmpeg_build/bin:${PATH}"

# Cleanup
RUN rm -rf /ffmpeg_sources

# Source profile
RUN echo "source /root/.profile" >> ~/.bashrc



WORKDIR /usr/src/app
RUN apt-get update
RUN apt-get install -y nodejs
RUN apt-get install -y npm
COPY package*.json ./
RUN npm install
COPY . .
EXPOSE 2000
CMD ["npm", "start"]


  


  While checking the network rules in the Docker image with the command : iptables -L
I am getting the following response :


  


  I am able to access every API of the dockerized app, and I receive the responses and logs. but I'm not receiving the jsmpeg stream through the websocket connection.

  


  I'm uncertain about the exact problem or how to resolve it.If you have encountered a similar issue before, and have a solution, I would greatly appreciate your assistance.

  


• Revision 36454 : uniformiser les inputs du formulaire de login

  19 mars 2010, par brunobergot@… — Log

  uniformiser les inputs du formulaire de login