Why are my MP4s so large in Camtasia Mac?

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I have recently switched from Camtasia Studio for PC to Camtasia for Mac.  Using my PC, I produced a 4 minute 1280x720 MP4 video at 56% quality with a frame rate of 15 fps, and it was 10 MB.  I just produced one on my Mac with the same settings, of 6:45 and it is 98 MB, rather than 18 as I would expect.  Even if I cut the quality level down to 10%, which is absolutely unacceptable visually, the file is 30 MB. 

What would the  difference be and what can I do about it?  I can't switch back to my PC, and I am producing over 14 hours of content - there's no way I can accommodate files this large. 

Thank you in advance for any ideas. 
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Laura Shoe

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Posted 5 years ago

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Laura Shoe

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I have tried reverting to 2.8.3 so I can access more settings in export, but still can't get file sizes that aren't at least 5x what I get on my PC.  On PC, I am producing a file with:
Frame Rate Automatic (30)
Keyframe rate 5
Bitrate mode: quality mode
H264 Profile: Baseline
H264 level: automatic
Video quality: 50%
Audio Bitrate 128 kbps
Audio Format AAC
(stereo audio, 44.1 kHz)

On Mac I have tried to replicate this with:
Video settings
Video format: H.264
Data rate: 128 kbps
Frame rate: 30
Key frame every 5 frames
H.264 video options: restrict profiles to Baseline
H.264 video options: Faster encode (single pass)

Audio settings
Format: AAC-LC (all other options grayed out except None)
Data rate: 128 kbps
channels: stereo
output sample rate 44.1 kHz
Encoding quality: good

What am I doing wrong, or is Camtasia Mac just not able to produce reasonably sized files?
(Edited)
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brianmt68

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Hey laura, looks like the mac settings you used 30fps to export instead of 15fps like your PC. This would create a bigger file even if you reduce the quality of the compression. I think if you make the aspect ratio smaller and keep the quality higher you might have more luck. Doubling the framerate on your MAC settings would make a difference. Hope this helps a little. It's a good idea to create, edit and export with the same framerate. Apologize if im reading it wrong but thought I'd give it a shot.
Brian
Christinemariestudio.com
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Laura Shoe

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Techsmith employees, I am wondering how to interpret your silence on this.  Is my only option to install Windows on my Mac and run Camtasia Studio?
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Kelly Mullins, TechSmith Employee & Helper

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Hi Laura,
Silence on this particular post by TechSmith employees only means we didn't see it - there are a lot of posts that come in on a daily basis and it's easy for some to get missed. Additionally, since this is a user-to-user style forum, we sometimes rely on other users in the community to sometimes answer other user's questions.

So, not having a TechSmith employee weigh in on this topic actually doesn't mean anything at all.
Kelly
(Edited)
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Donna

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This is an issue for me as well.

I had a 23 mb video that I imported. The length is 3 mins. . I added a trailer frame plus pictures (3) whose total size is 330 kb. I am exporting to MP4 and it is taking FOREVER and the file size is unusable.

I tried uploaded to YT - same result. I've tried other suggestions that I've read but nothing reduces the file size or the TIME!!!!

It's awful. Please fix this. Please.
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Kelly Mullins, TechSmith Employee & Helper

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Hi,

There are many variables that go into the final size of a video when using Camtasia Mac.Things like your dimensions, what kid of video you are using, etc. You don't say if the recordings you are using are screen recordings or if they are real-world video, gaming video etc.

Camtasia as a rule works better with screen capture recordings versus HD, real world, or high motion videos.

Usually if you just use the default export options you will get the best results in terms of file size and quality.
You can also try putting your videos through an app like Handbrake to see if it reduces the file size before you put them into Camtasia.
You can also do this with your exported videos to see if it will further reduce the file size.

Kelly
User Assistance
TechSmith
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Sarah Benoit

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Kelly, your answers are not really that helpful to those of us having issues. I have been using Camtasia for the PC regularly without issue for screen capture videos I do for my online classroom without issue, now while on the road I had to use my MAC and the files are also huge for some reason as Laura mentioned. I am not importing video files or doing anything other than recording my screen as usual. Is there anyone who can answer Laura's original question, which was why are the files so large and therefore essentially impossible to upload online? Also is there any way to fix this issue? On my PC version I can choose what type and size of mp4 I export but when I use the Mac version I don't see these options. Any help is appreciated.
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Brian

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I'm facing the same problem. To change the MP4 options on Mac, you need to use Share > Advanced Export. In the file dialog, next to filetype at the bottom, click on Options to bring up the frame rate, aspect ration, and quality. I've been trying to find a sweet spot for quality vs file size, but I'm still getting massive files for short recordings. Might try using ffmpeg next to crunch it down a little more.
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Kelly Mullins, TechSmith Employee & Helper

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Hi,
I'm sorry you are having this trouble.

I would like to recommend you open a ticket for this in our Technical Support system. They can give you more general information about what might be causing the large files and also help walk you through setting changes you might need to get your file size down to something more manageable.

TechSmith technical support is a free service and you can submit a ticket here:
https://support.techsmith.com/hc/en-us/requests/new

Please
Note: Copy and paste the URL to this post into your Technical Support ticket. 


Or call: 1.517.381.2300
Toll Free: 800.517.3001 (U.S. & Canada Only)
8:00 AM to 7:00 PM EST Monday through Friday

Our Technical Support team strives to get back with you within 24 business hours.


Kelly
User Assistance
TechSmith

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Oliver Oursin

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It seems that the support ticket did not resolve it as I saw on the other forum topic. As I said there, I think this is totally unacceptable. It is hard to believe that TechSmith does not know about the fact that Camtasia on Mac is unusable. The file sizes it creates are horrifying beyond believe. I can only recommend to use NCH Debut instead. It create a 16MB file for exactly the same video, length, etc. where Camtasia takes 130MB+.

TechSmith, first step for you is to acknowledge the issue. 2nd step is to fix it. At least I would do that if I were interested in the Mac market.
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Sarah Benoit

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Official Response
Thanks for telling me to open a support ticket Kelly. They were able to give me really good instructions on how to fix this issue and clarified the steps involved. They responded within one day of my ticket so here is the fix for MAC users. Sorry it took me a couple weeks to get back in here and share. I have not used handbrake yet since the advanced settings Joseph gave made the file about 1/3 of the size which worked. Still pretty large but workable. I'll let everyone know if I have any issues with handbrake in the future. Here is what they gave me. The key was choosing "Main Concept mp4". I had not done that when I was trying to figure it out.

FROM Joseph Beaubien November 20, 2015 18:42

Hello Sarah,

Thank you for contacting TechSmith Technical Support. If you are looking to lower the file size of your videos created in Camtasia for Mac, I would recommend using the Share>Advanced Export, then select main concept and options to bring up the advanced export option. Once you have the advanced export option, you do have the option to adjust the file size using the quality slider there (which I would recommend setting to about 50-25% to get a smaller file size in your video: http://www.screencast.com/t/LTrtta2g4A

If your file size is still to large, you can try using a trans-coding application (Such as Handbrake) to re-encode your video to see if that helps with your issues. Here is a link to Handbrake (http://handbrake.fr) to re-encode the video and use the "web optimized" options to set the correct items for web playback. I made a screenshot with some steps here that walks you through the interface: Http://screencast.com/t/jaUq8s48

Please let me know if you have any questions.

Kind Regards,
Joe
Technical Support Specialist



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Kelly Mullins, TechSmith Employee & Helper

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Hi Sarah,
Thanks so much for taking the time to come back and post this information. I know others will find this to be very helpful and I appreciate you taking the time to help others.

Kelly
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Laura Shoe

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This reply from Techsmith is in response to the question, "How do I reduce file size in Camtasia Mac?"  It is not a response to the question, "How do I get file sizes with Camtasia Mac that are comparable to Camtasia Studio on PC, with comparable quality, and without having to use some third party program after producing the file?" The response to the latter question, which I submitted a ticket for,  is "You can't." The options I was given by support were to either keep my PC around so I could use Camtasia Studio, or run Windows on my Mac. 
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Oliver Oursin

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I am still sitting frustrated. With the settings as described (quality at 25%) I am still getting a 3x bigger file on a Mac versus a PC - plus the MP4 from the PC is a MUCH HIGHER quality while the Mac is blurry etc. So using the US$ 30.- NCH Debut software seems to be a much better deal, given that it does bring really good quality and small file sizes. Just as the Camtasia Studio does on Windows.

Don't get me wrong. I am using Camtasia for years and I love(d) it, until I experienced how bad the Mac version is, not just from a file size or quality, but also with things such as markers etc.

It simply does not work on a Mac to combine a reasonable file size with a reasonable quality, hence my comment to not using Camtasia on a Mac.

Furthermore, the ignorance of TechSmith about this issue tells me that there won't be a fix ever. Because why would you fix something that you do not believe broken?
(Edited)
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Sarah Benoit

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I would definitely try Handbrake. I used it today following the instructions Techsmith gave me and it has worked well to compress the file size. Also send them a support ticket as Kelly suggested. They respond usually within 24 hours and are willing to try and help with this issue since they are aware this is frustrating for MAC users.
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Sarah Benoit

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FYI Oliver I def agree that my PC version works better overall for file size and quality. I won't be using my Mac again any time soon. It takes to much extra time. But if you need to get a file out of a MAC recording like I did you can get something usable.

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