Recorded Zoom files

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asik1
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Re: Recorded Zoom files

Post by asik1 »

rwernyei wrote: Tue Mar 16, 2021 1:34 pm asik1,
YouTube trimmer requires YouTube ID or Url. I guess your advice would be helpful for those trimming YouTube videos?
Indeed, but what in a trimmed zoom if not for the world to watch?
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rwernyei
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Re: Recorded Zoom files

Post by rwernyei »

In my world your advice does not apply. Due to the pandemic, the norm for legal depositions is Zoom with timestamp. Content is only shared amongst privileged parties and the Court. Private or unlisted YouTube channels/videos can be compromised.
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Re: Recorded Zoom files

Post by cybernick »

rwernyei wrote: Tue Mar 16, 2021 5:30 am My experience with Zoom recordings is that it tries to optimize the recording based on one's screen resolution. I have an Acer Nitro 5 laptop with native Display resolution 1920x1080 and overclocked Refresh rate of 101 Hz.

Try this:
Test 1: Record 10-15 secords and stop recording. Look at your Zoom mp4 properties: 1280x720, 1804 kbps, 1936kbps, 25 fps, 132kbps 1(mono) 32 kHz
Test 2: Record webcam image for 10 secords or so and now share your screen moving your cursor on the screen for a couple of seconds, now stop sharing and stop recording. Check your new Zoom mp4 properties: 1920x1080, 1804 kbps, 1936kbps, 25 fps, 132kbps 1(mono) 32 kHz
Test 3: Zoom settings in the above screenshot under Recording if you check Record video during screen sharing and also check Place video next to the shared screen in the recording you will get an entirely different resolution using the same procedure in Test 2. After recording and sharing screen you will end up with a mp4 with properties: 2200x1080, 1804 kbps, 1936kbps, 25 fps, 132kbps 1(mono) 32 kHz

Personally, discovering this glitch I use the Test 2 method for all my recordings. Meetings with several participants with screen share privileges throughout the recording I still share my screen for a couple of seconds, stop share and then stop recording to ensure my ending mp4 resolution will be 1920x1080. I find this method has always delivered. Hope this helps.

Also I find FFmpeg does the best at making simple cuts to my Zoom recordings based on start and end times in seconds. Example: 3 hour video, I trim the last 10 seconds off. I use a script like: ffmpeg -i D:\Z\zoom_0.mp4 -ss 00:00:00 -to 02:59:50 -c copy output.mp4

Z represents the name of the folder where I store my mp4 after my Zoom recording. The above script takes Smart Rendering to a whole new level. Encodes an exact copy with edit in less than 15 seconds!
That is very cool. It is cool that works. I wish "zoom" had a simple setting in the recording tab instead looking to workaraound?

thanks
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