I am an new to Natron and really excited. One thing that turned out as a problem right in the beginning were glitches (in the read node?) while writing/exporting the video. When writing my my project (split screen of 4 input videos) I always get corrupted or frozen frames. I first tried with mp4/h264 from my Canon camera: mpeg block corruption artifacts in the result, In my second attemt, mkv/huffyuv skipped several random frames in two of the four videos,
My question is: What is is the ideal video format (container and video/audio codecs) for Natron?
I agree with @magdesign.
In the Writer node properties panel, there is even an “Overwrite” check box, which is checked by default. If a render fails, just uncheck it and relaunch the full render, it will only render the missing frames.
Be careful though: I am not sure your ffmpeg command will produce 16 bits png if the input video is 10 bits or more. I would prefer dpx or exr frames for that purpose.