quick mp4 segmenter

choppa.coffee

exec            = require('child_process').exec;

args = process.argv.splice(2);

if args != 4
    console.log 'usage: file totalTime dT outRoot'

file = args[0]
totalTime = parseFloat args[1]
dT = parseInt args[2], 10
outRoot = args[3]

nChunks = Math.ceil(totalTime/dT)

lastTime = totalTime - (nChunks - 1) * dT

cliArray = []

for i in [0...nChunks]
    time = dT
    time = lastTime if i == nChunks-1
    cli = 'echo ffmpeg -v quiet -y -ss ' + i*dT + ' -t ' + time + '  -i ' + file + ' -c copy -sn ' + outRoot + i + '.mp4'
    cliArray[i] = cli

console.log cliArray


runChain = (cliArray,i) ->
    cli = cliArray[i]
    exec cli, (err,sout,serr) ->
        if err
            console.log err
            process.exit 1
        else
            console.log sout
            console.log serr
            i++
            if i < cliArray.length
                runChain cliArray, i
            else 
                console.log 'done 1'
        null
    null
runChain cliArray, 0