Author Topic: Thoughts on AVCHD vs MP4 for technology videos on YouTube  (Read 526 times)

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Offline Tony_G

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Thoughts on AVCHD vs MP4 for technology videos on YouTube
« on: March 24, 2019, 01:43:52 am »
Hey All,

I've been doing my channel in 35MBps MP4 on Canon R600 & R700 cameras. I've never really thought about using AVCHD but I just acquired Adobe Premiere Pro and they have a transfer utility that understands the AVCHD format.

All the information seems to imply that AVCHD has better resolution and is easier to work with but when I took some sample clips I really couldn't notice any difference.

Anyone have any experience/thoughts on whether one should move to AVCHD or just stick with MP4.

Thanks,

TonyG

Offline blueskull

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Re: Thoughts on AVCHD vs MP4 for technology videos on YouTube
« Reply #1 on: March 24, 2019, 02:21:12 am »
Doesn't matter that much. Repetitive compression kills more than a crappy initial compression.
Don't transcode until final exporting, that's why pro studios have gigantic footage storage albeit they can trim the fat of some partially failed shots and chose not to.

I just shot four identical clips in 28M AVCHD, 28M MP4, 50M XAVC and 50M 4K 30P XAVC.
The 4K looks the worst due to flickering caused by lower fps, and the rest look similarly, with the 50M XAVC having a *slight* edge.
The MP4 looks almost identical to AVCHD, so I normally pick MP4 for easier importing and faster transcoding.
I do plan to expand to 4K, but sensor heating is a known issue among Sony A series, and nothing deteriorates image more than a hot sensor.
So for me, I'm sticking with 1080p MP4 for quick internal lecture videos and XAVC for production. XAVC also does 120fps slow motion, so that's a future capability if I need.

If you have to trim some clips before final exporting, consider using ffmpeg with -c option. This allows you to copy selected stream data without transcoding them.
It may introduce prepending and appending frozen or black scenes if your input format doesn't support low interval I-frame, but it serves the purpose of reducing file size.
 

Offline amyk

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Re: Thoughts on AVCHD vs MP4 for technology videos on YouTube
« Reply #2 on: March 24, 2019, 04:24:01 am »
I think MP4 (H.264) is fine for basically all videos today.
 

Offline rsjsouza

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Re: Thoughts on AVCHD vs MP4 for technology videos on YouTube
« Reply #3 on: March 25, 2019, 05:09:40 pm »
I think MP4 (H.264) is fine for basically all videos today.
Well, it is fine for videos up to 1080p. According to the rederence below, AVCHD goes beyond that.

https://m.dvdfab.cn/resource/video/avchd-vs-mp4

I always get confused between the MPEG-4 codec and the MP4 container. I think this was a deliberate choice to confuse people in favour of MP4, but maybe it is just me... :P
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Offline EEVblog

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Re: Thoughts on AVCHD vs MP4 for technology videos on YouTube
« Reply #4 on: March 26, 2019, 12:14:54 am »
I used to use 28Mbps AVCHD but have switched to 20Mbps XAVC S MP4 on the new camera. 60Mbps if it's 4K
Majority of tech videos don't need high bitrate because there is little moving footage. i.e. tripod shots of products and/or talking head etc.
 

Offline rsjsouza

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Re: Thoughts on AVCHD vs MP4 for technology videos on YouTube
« Reply #5 on: March 26, 2019, 02:28:19 am »
I used to use 28Mbps AVCHD but have switched to 20Mbps XAVC S MP4 on the new camera. 60Mbps if it's 4K
Majority of tech videos don't need high bitrate because there is little moving footage. i.e. tripod shots of products and/or talking head etc.
Dave, for technical content, do you see much advantages to 4k? (Apart from the coolness factor, of course).

I know that a talking head video does not benefit at all but, when showing a PCB, do you see it as a benefit to having the extra resolution so you don't see the need to take hi-res photos of the board?
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Oh, the "whys" of the datasheets... The information is there not to be an axiomatic truth, but instead each speck of data must be slowly inhaled while carefully performing a deep search inside oneself to find the true metaphysical sense...
 

Offline EEVblog

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Re: Thoughts on AVCHD vs MP4 for technology videos on YouTube
« Reply #6 on: March 27, 2019, 10:04:51 am »
I used to use 28Mbps AVCHD but have switched to 20Mbps XAVC S MP4 on the new camera. 60Mbps if it's 4K
Majority of tech videos don't need high bitrate because there is little moving footage. i.e. tripod shots of products and/or talking head etc.
Dave, for technical content, do you see much advantages to 4k? (Apart from the coolness factor, of course).
I know that a talking head video does not benefit at all but, when showing a PCB, do you see it as a benefit to having the extra resolution so you don't see the need to take hi-res photos of the board?

Yes, for teardowns I would usually shoot 4K, it lets you zoom in to more detail in editing if needed.
There are reports that 4K rendered down to 1080p is sharper and better quality than 1080p footage shot on the same camera. I think I did a test of this on the 2nd channel someone at the time, but don't recall. But 1080p60 beats 4K rendered down to 1080p30
 
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