Hello everyone,
I started normalizing and cutting the first talk today. The result is
here:

https://thomas.glanzmann.de/curl-meet-2017/2017-03-19_01_Dan_Fandrich_Advanced_HTTP_Scripting_with_curl.mp4 (38M)

This is without audio processing from my father, may I'll update the
sound track later on. But I think the result is pretty good. I'll try to
finish the rest of recordings within a week. I'll leave the videos under
this location, but I assume that Daniel will host them on the curl
website as well.

I tried with chrome, and mpv. Firefox on Debian chokes on me. If someone
finds a fix for that, let me know. That is what I did:

Video ahead of Audio
====================
I synced on the first slide turn (you can see it and you can hear it becaus Dan
hits the keyboard so that you can hear it)

Video: 2:01
Audio: 0:59
Difference: 62 seconds

# 4 seconds need to be removed from Video before Dan starts the talk
# The talk is exactly 1990 seconds long.
ffmpeg -y -ss 4 -i DR-100_0038.mp3 -t 1990 -c copy cut_DR-100_0038.mp3

# Normalize Audio to a decent volume.
ffmpeg-normalize cut_DR-100_0038.mp3

# Remove first 66 (62 + 4) seconds The talk is exactly 1990 seconds
# long. Do _not_ use copy otherwise you don't have a key frame to hit
# the time index correctly.
ffmpeg -y -ss 66 -i advanced_scripting.mkv -t 1990 -async 1 cut_advanced_scripting.mp4

# Merge Video and Audio
ffmpeg -i cut_advanced_scripting.mp4 -i normalized-cut_DR-100_0038.mp3 -vcodec copy -acodec copy -map 0 -map 1 merged_advanced_scripting.mp4

Cheers,
        Thomas
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Received on 2017-03-19