How Can I Use Go\'s `os/exec` Package to Pipe PhantomJS Output to FFmpeg for Video Creation?

Employing Golang's Exec Package: Execute Commands with Pipe and Record Webpage with PhantomJS

In an attempt to capture a webpage using PhantomJS and seamlessly pipe the resulting images to ffmpeg for video creation, you've encountered a challenge. Executing the command directly in the terminal yields the desired results, but the stumbling block lies when running it through Go's os/exec package.

To overcome this hurdle and avoid the laborious task of writing images to files, you've explored the possibility of executing the entire command as a single entity. Here's a solution that could help:

import (
    "fmt"
    "os/exec"
)

func main() {
    cmd := "phantomjs runner.js | ffmpeg -y -c:v png -f image2pipe -r 25 -t 10  -i - -c:v libx264 -pix_fmt yuv420p -movflags +faststart dragon.mp4"
    output, err := exec.Command("bash", "-c", cmd).Output()
    if err != nil {
        fmt.Printf("Failed to execute command: %s", cmd)
    }
    fmt.Println(string(output))
}

In this approach, instead of relying on the os/exec package directly, we employ a 'bash' command to execute the entire string as a single entity. This allows us to maintain the pipe functionality and execute the command seamlessly.

Upon successful execution, the output from ffmpeg will be captured in the 'output' variable, and you can proceed to handle the results as you require.

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