Hi:
I bought Sound Forge Audio Studio v.10 at the suggestion of a friend for simple editing of audio from .mov camera videos.
It has sufficient video capability for me, actually more than I anticipated, but I am plagued by not understanding which actions I apply result in nearly identical file size (minimal increase) and other times massive file increases. I saw a similar discussion under another product's category.
My question is at the end of this, but I have explored many different software paths and like everyone else sometimes have different needs, so I explained my twisted path...
Basically trying to deal with horrible audio quality in every form of digital camera (still or video) I have recorded musical performances with, I have attempted editing audio with it remaining attached, separately, then re-muxed (other software before discovering SFAS), and attaching (dubbing?) separately recorded files from a digital audio recorder.
Detaching and re-attaching audio was causing significant file length increases in other programs...far worse than 'clock drift'...like almost doubling the timeline. Three different cameras.
SFAS is the first program that actually showed me what was happening to my files...they were imported at the nominal 29.97 (30) fps I expected, but when saving the results, the frame rate was some totally unfamiliar number like 18.64 FPS (I don't remember exactly). SFAS would display the 'different' FPS number, but also allow me to type the correct numeric value back in and save it successfully. Several other 'freeware' programs never even recognized the frame rate was being changed. It's definitely NOT a SFAS problem. SFAS just reveals the frame rate corruption.
The guy who recommended it is a software engineer in a totally unrelated industry but he said he used this program instead of a free program because 'you get what you pay for' and it's not his area of interest to dig into audio/video containers. What he did say, however, was that, particularly with consumer grade or cameras that have video capability as an 'extra' feature, there are too many hardware and software protocols for manufacturers to comply with 100% in all situations...they do what they need to for their requirements, for economic reasons. He said basically if you 'break' a file's interleaving with the kinds of experiments I was trying, all bets are off.
I could never find anyone who experienced the same audio frame rate corruption problem because people who have professional needs buy the proper industry standard hardware and software they need instead of hacking & bandaging things as I was.
A separate detour was surgically removing the electret mic from two cameras and hacking an external mic jack onto the cameras...to improve what audio was captured to minimize the post-processing necessary. That worked but introduced new issues.
So, what I would like to learn is why I am sometimes able to save (or was it export?) as .mov, files I import as .mov and perform audio editing, or splitting or trimming operations on, without massive file size (like 75-100x) increases. It's like some operations cause transcoding and others don't. It seems like all is well until I save as mov. I assume I MUST save-as after reattaching the video or the result won't get saved.
I typically save the audio as .wav after detaching the video and performing audio edits. I might have tried saving audio-only files as .mov because it was in the save-as menu, but think it produced a massive file so I assumed it was wrong.
Thank you
Murray