Sound and jpeg

Question

Using iMovie '09 (8.0.6), I had combined jpegs with an MP3. I added the jpegs to the sound files so that I could place them on YouTube. The process went well enough, but the sound was inconsistent in quality -- uneven volume, sometimes echos -- so someone in Tech Support said that I would get better results from the new iMovie. I have downloaded iMovie 10, but I can't reproduce the results.
This is my goal:
1. Attach one MP3 sound file to a set of 21 jpegs that change through the duration of the movie.
2. Keep the images from shifting around as they change.
3. Use the screen aspect ration of an iPhone, 4:3.
4. Do this 4 times.
Here is the article that was my starting place. https://support.google.com/youtube/answer/1696878?hl=en
What I did was to drag a jeep to the staging area, and then I dragged an MP3 into the project area.
Next I used the gear icon to specify the clip length, and I clicked the "Every clip equal" option, so that all of the jpegs would appear for the same amount of time.
I used a set of 21 jpegs. They progress in saturation from 0% to 100%, in 20 steps, so that the image appears to steadily gain color through the length of the movie.
Now, in iMovie 10, I am having trouble specifying the clip length.
I also find that the pixel size of the movie has changed, so it no longer matches the dimensions of the jpeg.
Here is a link to the older movie. https://www.youtube.com/watch?v=BaNfHekRIKs&list=UUuhnyLkerlWFdLYaf4b34VA

Answer 1

Would QT Pro be the correct program?
It certainly is one application that can do this. The basic work flow would be as follows:
1) Open an MPEG-4 audio file.
2) Use the "Open File..." File menu option to open the associated JPEG file in a second "player" window.
3) Press Command-A and Command-C to copy the JPEG player content to memory and then close the player.
4) If not already active, re-select the MPEG-4 audio player and press Command-A to select all audio content.
5) Use the "Add to Selection & Scale" edit menu option to paste the JPEG image across the entire selected duration of audio.
6) You can save the audio video segment at this time if you wish.
7) Repeat steps 1 thru 6 as needed to create additional player segments.
8) Create a new player.
9) Open or select a previously create audio/video segment and paste it to the "new" player.
10) Repeat step 9 to order the segments to the new player as desired.
11) Use the "Save As..." File menu option to name and store the final movie.
While somewhat repetitive, the process of creating your movie is very easy to perform.
I have IMOVIE 6 HD but I can't seem to add the MPEG4 track as an audio track.
iMovie could be used but GarageBand might be easier to work with here. The basic work flow would be as follows:
1) Create a new GarageBand "Podcast" project.
2) Drag 'n Drop each of your audio tracks to the project window in their proper order. (They can be added as separate tracks if you want to "overlap" the audio or merged together as a single track with or without a break between audio segments.)
3) Add the individual JPEG files to the "podcast" track in their proper order and slide, stretch and/or shrink the duration of each JPEG display to match its associated audio segment.
4) Export the finished project to your desired compression format based on how you plan to use/distribute the content.