* modules/stream_out/transcode.c: small cleanup + added an fps (to specify the output frame rate) and an audio-sync option (to add/drop video frames to keep a constant framerate while being synchronised on the audio track).
* modules/stream_out/transcode.c: small cleanup + added an fps (to specify the output frame rate) and an audio-sync option (to add/drop video frames to keep a constant framerate while being synchronised on the audio track).

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