Convert 5 individual 1080i m2ts with Dolby AC3 to MP4 1080p 50fps

[jagabo]

I though you wanted to join all five inputs to one output.

[bloodhand]

That was the plan if I couldn't find a way to sync sound and, at the same time, to have all the inputs merged. Therefore, I would have encoded all 5 inputs individually with synced sound and the only way to obtain 4 final outputs with a desired size would have been to first merge the 5 encoded inputs into one and then split this back to the 4 desired final outputs. But it's great that I don't have to go through all this.

Many thanks again.