I am using live streaming H264/AAC as input, and need to transcode additional lower resolution live stream output. Also, I will passtrhu the input to output but I need these two to be H264 keyframe aligned streams to be usable as HLS, Smooth, Mpeg-dash futher downstream in my workflow....

My "idea" is to get ffmpeg to insert keyframes at exactly same frames and using equal PTS and DTS in the output as found in the input stream? Is that doable or is there another way to do it without transcoding the original input which I want to remain at it's original bitrate and video quality?



thanx for any advice
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Haris Zukanovic

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