"frame-rate"... don't you mean bitrate?Originally Posted by DB83
In my tests, file size does change with frame size using the WMV encoder in Magix: 640x480 Quality 90 was 2.998MB, 1920x1080 Quality 90 was 8.506MB (as you would expect, using a "quality"-based encoding setting, as opposed to an "average" or "constant" bitrate setting).
@video.wmv, I wouldn't be too hung-up on frame rates; the video isn't of people or actual live motion. For screen capture-type videos, as yours is, lower frame rates can be quite acceptable.
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@Alwyn
Gracias por la conversión correcta de velocidad de cuadros a velocidad de bits. -
Amazing that so far "everybody" in this thread recommended the obsolete Windows Media Encoder and ignored the much-better / less-sucky Expression Encoder 3.
@ the OP: if you choose the .AVI route, then use the Xvid codec. It's freeware and does support Full-HD resolutions. I myself prefer the ancient DivX , but DivX became abandonware and difficult-to-find.Last edited by El Heggunte; 26th Jul 2024 at 09:39. Reason: clarity
"Programmers are human-shaped machines that transform alcohol into bugs." -
Hello all
I will try to answer each question separately. This coming week I will return to class (we are ending the winter break) so I can test videos on clients' PC.
Maybe you are right. But the point is, reducing 50% of the fps (30 fps -> 15 fps) can really reduce the file size significantly? I am asking seriously, I am not an expert, sorry for the question.
I also want to point out that sometimes I add images with transitions in some of the screen capture videos. It is not a universal formula. Sometimes I want to illustrate something I am saying with high quality images, and so the video can lag within those 3-4 seconds of images.
The software and the OS are too old that mp4 files cannot be reproduced using "Show a video" tool. I am not able to modify this because it does not depend on me.
From your answers I learn it. What I was saying is that it amazes me that the software tool that @DB83 used also reported a low bitrate. So that software is wrong, too? That was my question.Last edited by video.wmv; 28th Jul 2024 at 12:22.
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I don't think 72 mb is a bad result. I am looking for results that are less than 100 mb maybe.
Which software did you use? Which config?
I wish that can be real, but as I said in the last message, that does not depend on me. I need to export with these unused formats, sorry. -
I think this does not matter at all. Does 30 fps or 24 fps make any difference at all?
As said previously, my videos are all not the same. Some videos are only screen capture-type videos, some others are animated, some others combine screen capture with high quality images, etc.
To solve this, all the videos must have the same general config: exported with Camtasia @ 30 fps, 720p in some cases, 480p in other cases. That's mostly all. If I change to 15 fps, the videos that have transitions will not look great.
But if you found that 20 fps videos have a significant less size than 30 fps videos, then I will change it, no problem. -
^^ A lot of wine has washed thro this skull since I wrote
If memory serves I used Windows Media Encoder (as rec) + 1280*720 + low quality. Like I said, MS no longer offer this for download so you have to get it from elsewhere and I still have an antiquated Win7 system. But if you can get this to work do your own tests since I might have missed something along the way. And there were several tests I did before this result. -
Yes it can. Look at the size of the file I uploaded compared to the original you uploaded. It's 40 percent smaller and still readable (except the greyed out text). Considering 25 percent of the original file is audio, and the exact same audio was copied to my new file, the video stream is reduced by more than 50 percent.
At the time I thought the original video was typical of what you were dealing with so that's why I took that route. Real world full motion video will not be smooth and will flicker at 15 fps. And you will not be able to get real world full motion video (like in your later post) with any quality with bitrates that low with older codecs, even at 15 fps.
They claim to support "mp4" but it's not clear what they mean by that. Maybe it doesn't support the mp4 container. And it looks like it doesn't work with h.264 video (at least without downloading and installing an h.264 decoder). They may mean the MPEG 4 Part 2 codec, examples of which are Microsoft MPEG4, Divx, and Xvid. But none of those will be able to compress as well as newer codecs like h.264 (AVC), h.265 (HEVC), VP9, VC-1, or AV1. -
Want my help? Ask here! (not via PM!)
FAQs: Best Blank Discs Best TBCs Best VCRs for capture Restore VHS -
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Thanks for the help. I just took a screenshot of the 2nd video and here is what it says:
[Attachment 81141 - Click to enlarge] -
"Programmers are human-shaped machines that transform alcohol into bugs."
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Yes it works! Sound good, video is good.
The only thing is that my impression when I was passing the video to the students' PC, it takes nearly 1 minute in total. And the size is 50 MB. The WMV-converted-video has larger size but it took ~30 seconds. Why is that?
After all, I like your proposal. Could you share how you end up with those videos?Last edited by video.wmv; 2nd Aug 2024 at 12:54.
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I used standalone AviDemux app, it's freeware and avail here on this site.
After installation just copy attached preset files into the Plugins\autoScripts folder.
So y just open video to process -> go menu Auto -> pick preset -> press Ctrl+S (SaveVideo) -> select destination -> Done
Encoding time somewhat depends on clip complexity, but should be around its duration.
For convenience preset name include ~bitrate per minute, so you can easy predict output size
Lower bitrate ones intended for presentation style videos - a lot of blank space, some texts, not much details or movement.
Higher bitrate is for real life footage, with a lot of details or movement. -
Hello sir, I downloaded the appimage on a Ubuntu virtual machine. I granted "Allowing executing file as program" permission, double-clicked and opened the Avidemux program, but I am not able to find any Plugins\autoScripts folder. I am a Linux newbie, so how can I find it? Or how to extract the files and open the Avidemux program?
Thank you -
I downloaded the appimage on a Ubuntu virtual machine.
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Sorry for the confusion. I'm on Windows but I use a VM to run Ubuntu. I downloaded the AppImage Avidemux for the Ubuntu OS. But I don't know how to extract/create the desired folder so that I can run one of the .py scripts you have attached and produce a video.
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I finally decided to install Avidemux on Windows and I am 'exporting' the videos myself, I will test some videos tomorrow, thank you again!!
I have a question. Why did you decide the following configuration:
1) 1280x720 - (8 MBpm)
2) 1360x768 - (3,7MBpm)
3) 1440x816 - (4,5MBpm)
but not something like?:
1') 1280x720 - (8 MBpm)
2') 1280x720 - (3,7MBpm)
3') 1280x720 - (4,5MBpm)
I mean, from my understanding a higher resolution (like 1440x816 has more pixels than 1280x720) implies a bigger file size, but this is not the case since I compared 1) and 3) and 3) has smaller file size than 1). Why did you mix the resolution and the bitrate?Last edited by video.wmv; 7th Aug 2024 at 00:37.
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Low bitrate presets are intended for presentation style videos (with a lot of blank space, texts, but not much movement). Such videos don't need much bitrate to maintain quality. OTH too low resolution makes it soft after stretching to bigger screen, like 1920*1080. But if your student screens are 1280*720, then yes, I'd use 1280* resolution for all presets.
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Hello @buzz1891, thank you for your kind help!! That makes sense.
I tried to export a video using Avidemux with one of your presets and used the NetSupport School's Show Video tool, but after a few minutes, some of the students' computers began to hang and while the video was playing I had to move them to other computers that continued playing the video without freezing. It had never happened to me, it's the first time. After another like 5 minutes half of the computers froze. Do you know what it could be?Last edited by video.wmv; 17th Aug 2024 at 13:11.
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@video.wmv
I can only guess that *Show video tool* relies in internal, vastly outdated decoder. Can you confirm that 1360 & any other of 2 presets fail too? (1360* uses slightly different video encoder). Another option is to go *configure* for audio and try CBR mode instead of ABR. -
I used 1440x816 preset to export the videos, but I can try to show using one of the other 2 presets, yeah why not.
Let me test and comment the results.
I showed two of those videos in the same class and both froze some computers. These computers have Win 7 and some of them are 32-bit, even Google Chrome installed on them has some lag issues, I asked to install Firefox and it runs faster. As you can see, the computers are outdated in most of the cases.
Test CBR instead of ABR for every preset? That are a lot of tests lol
Thank youLast edited by video.wmv; 18th Aug 2024 at 19:49.
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That are a lot of tests
But it still possible that it's just performance issue of the students PCs, for that case I'd monitor task manager for CPU load figures. -
Hello @buzz1891
Some videos that I open on Avidemux and export using Camtasia 1080p config are not possible to render because of this window dialog:
[Attachment 82179 - Click to enlarge]
After clicking No it shows:
[Attachment 82180 - Click to enlarge]
I used 1360x768 (3,7MBpm) script you provided.
For the same video, the other 2 scripts you provided Avidemux success on rendering it. Do you know why that script is failing? How can we fix it? Because I want to export using that script (or with fixes) because it produces lower sized videos.
Thank you
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