however, AVI renders can result in huge file sizes
I often have to make multiple MP4 renders [due to file size issues] to use in a single composite project which I final render to MP4
the 1st MP4 renders are accomplished with a custom production, where the video quality has been set to at least 70% [vs. the CS default which is 50%]; this greatly improves the MP4 quality; the higher the quality of the MP4 source clips, the higher the quality of the re-render made from the MP4 source clips; I also set quality to 70% for the final render
note: you can use even higher MP4 quality settings, but I've not seen much difference between 70% and 100%, just file size grows substantially
so again, if the 1st render will not be hosted [shared], make it to AVI; but if the 1st render has to be shared, use MP4 at 70%, the re-render at 70%
- Edit MP4 video like trim, crop, rotate, merge, split, watermark, subtitle, compress, effect, edit video image, adjust video bitrates/channel, audio channel, extract audio file from video etc.
- Besides editing MP4 videos, it also helps to edit AVI, MOV, MKV, DV, VOB, RMVB, FLV, MPEG, AVCHD, etc.
- Besides editing videos like MP4, it also can edit MP3, M4A, AIFF, AC3, CAF, WAV, WMA, FLAC, Apple Lossless, OGG etc.
- Aside from editing MP4, it also helps to convert any video or audio to portable devices like iPhone, iPad, iPod, HTC, Blackberry, PS3, Android etc.
THAT'S IT. How easy is THAT?! It works GREAT.
your original file had a low frame rate; it is likely that your productions used much higher frame rates[?]; this would significantly increase the individual file sizes
next time you need to break up a large clip, make partial timeline selection, right click the selection, add to Library; repeat for rest of project selections
then, put each section's Library asset on timeline, and treat as separate project; edit; produce
since your original file was a very low frame rate, do custom productions, and set a low frame rate; that should help reduce those file sizes
Carol, here is my 2 cents.
6kbps is so low it would be inaudible. I know because I just tested a short clip with my voice because this topic intrigued me. I would experiment with the audio settings to find something you can live with.
I also created a 5 fps recording for my tests.
You need to set you frame rate to 5fps manually to get a video produced at the same frame rate. Camtasia will produce it at 30fps by default when the frame rate is set to automatic. This will reduce the file size somewhat but surprisingly not by very much.
For what it's worth here are my test results. The video was edited and recorded using the same dimensions that you are working with.This is the file size of my 30 second video at 30 fps and 128kbps audio.
This one is produced at 5fps with audio at 128kbps.
This is the inaudible 5fps video at 6kbps.
So it looks like audio is the key factor here. Finding that level that still sounds OK may be another matter. I used the default video settings and the video looked good but it was also a Camtasia recording so your results may vary.
I don't know how helpful this truly is but this should give you an idea of what occurs using different production settings.
Thank you all for taking the time to give me the above information, this has been really useful.
I now have a better understanding of frame rates, bit rates, dimensions, etc and how to set them in the custom production settings in Camtasia. The result is that I have reduced the size of the file while still keeping the visual quality and acceptable audio.