Don't glom the arguments together. Pass each as a separate array element: "-i", the URL string, "-c", "copy", the output string. And you don't need to quote the arguments, just pass them as is. I hope that makes sense -- I'd make it more code-like if I were at my desk rather than on my phone. --Andy On Sat, Jun 25, 2016, at 11:37 PM, Graham Cox wrote: > HI all, > > I am using NSTask to wrap ffmpeg, the video conversion utility. > > I am able to invoke ffmpeg alright, but it’s unclear how the argument > list should be passed through NSTask. I tried making my various > arguments into one big string, but ffmeg doesn’t parse it, instead > writing an error. > > Here’s my code: > > NSString* execPath = [[[self class] ffMPEGURL] path]; > > NSString* argString = [NSString stringWithFormat:@"-i \"%@\" -c > copy %@", [url absoluteString], [self.outputFileURL > absoluteString]]; > > self.ffMPEGTask = [NSTask launchedTaskWithLaunchPath:execPath > arguments:@[argString]]; > > > What the argument string should look like is: > > -i <source url> -c copy <dest file> > > > ffmpeg responds: > > Unrecognized option 'i "http://<the stream url>" -c copy > file:///<destination file>'. > Error splitting the argument list: Option not found > > > Obviously I need to pass the arguments differently, but it’s not clear > what I need to do. > > —Graham > > > > _______________________________________________ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/cocoa-dev/aglee%40mac.com > > This email sent to ag...@mac.com _______________________________________________
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