Question 80617 in Docker Question posted in
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Docker alpine: ffprobe not found, despite installing ffmpeg with apk in Dockerfile

I have a Go program that executes ffmpeg and ffprobe commands, so I need to install them in my Docker container.

Here is my Dockerfile:

FROM golang:1.17.7-alpine

WORKDIR /src
COPY go.mod go.sum ./
RUN go mod download
COPY . .
RUN go build -o ./server cmd/service/main.go

RUN apk update
RUN apk upgrade
RUN apk add --no-cache ffmpeg

FROM alpine
COPY --from=0 /src/server /usr/bin/server
CMD ["server"]

However, when I run container, it says:

exec: "ffprobe": executable file not found in $PATH

How can I fix it?

Tags:

2

Answers


  1. 0

    Because ffmpeg is a runtime dependency, not a build tool, you have to add it in the FROM alpine section, not the FROM golang:1.17.7-alpine section, such that it’s installed on the image that your server is actually run in, not the system image that your server is compiled against.

    The smallest change to your original code that makes it work, then, would just consist of moving lines around, without needing to change anything further:

    FROM golang:1.17.7-alpine
WORKDIR /src
COPY go.mod go.sum ./
RUN go mod download
COPY . .
RUN go build -o ./server cmd/service/main.go

FROM alpine
RUN apk update
RUN apk upgrade
RUN apk add --no-cache ffmpeg
COPY --from=0 /src/server /usr/bin/server
CMD ["server"]
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  2. 0

    Just refactor you Dockerfile as bellow:

    FROM golang:1.17.7-alpine AS builder

WORKDIR /src
COPY . .
RUN go mod tidy

RUN go build -o ./server cmd/service/main.go

FROM alpine
RUN apk update && apk add --no-cache ffmpeg
COPY --from=builder /src/server /usr/bin/server
CMD ["server"]
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