Art, I just dragged and dropped MP3 files from a windows explorer window onto the sound track are of the GUI... it's a very clumsy UI with very limited editing capabilities.

tbrown,

I haven't tried the software as I don't have a use for this, but there are some instructional videos on the publishers website that cover different aspects of using the software. In one of them that I watched, it talks about how to change transition timing as well as select the type you want.

tbrown, double click on the transition square beside each image in teh timeline bar to launch the transition chooser wizard for that transition.

Harry Mangurian, if you mean the Ken Burns effect... I cannot see such an option in the giveaways user interface

Csángó Katalin, What does pretty hard mean? Please expand on that.

Rick_S, interrupted, fragmented, every operation must be repeated until something happens - probably something incompatible with my machine. It's my experience to think of someone else, just because he already means it's different (fractal growth)

Katalin , If that is his response, thank you. I notice that you use the same last name. How do fractals figure into it? Can you clarify your experience? We have a lot of different people here with different backgrounds, and I ask for clarity when I don't understand something. It works best for communication.

wynford, that is because it re-encodes meda multiple times in the slidshow generation process! First it re-encodes the added sound track media files into individual uncompressed PCM WAV files in the current users "Documents\Photo Slide Show Time\Temp"

Then when you go to export it in your chosen format if first renders the images and transitions into an AVI file.... only when that file generation phase is complete does it then re-encode it all into the chosen output format... using priated copy of GPLv3 FFMPEG included in the package installed into the current users "Documents\Photo Slide Show Time\ffmpeg" folder.
Mines still encoding that initial temporary AVI file which is now at just over 3Gbytes in size and growing so and has been going for about 1hour and 20 minutes... because the file is actively being written to it is locked against reading so I cannot check what codec the video is being encoded in and if the AVI is incorporating the sound track WAV files too or if they will be added when the AVI is re-encoded into the output H264 mkv format... Show status bar in export wizard has yet to show any progress yet so it may only show some progress when FFMPEG.EXE is finally launched to do the final re-encode. Currently this looks like it will be doing lossy re-encoding twice, unless the AVI is generated with uncompressed video and audio streams.. which would be rather gross...

TK, looks like this outputs the semifinal.avi using legacy Video For Windows API rather than the later the later legacy DirectShow API since when the file reaches 4GByte in size it stops growing any further as that is a hard limit on AVI file size when using VFW API.
The existance of AForge.Video.VFW.dll in the installations folder also hints that they use this video API... This restricts the max resolution and duration combination the program will be capable of producing.

Once the AVI file showed it had stalled at 4.00GBytes I cancelled the export as I knew it would never complete succesfully and checked and the AVI file only contained the Video stream compressed using MS VIDEO1 CRAM FourCC code. So it uses a seriously lossy poor compression method before finally producing the lossy re-encoding using a more modern codec like H264 but no HEVC x265 or VP9 codecs are offered and no UHD resolutions either. Proves my point in other comment they are clinging tenaciously onto the trailing edge of technology.

wynford, I was wrong when I said it re-encodes the semifinal.avi into the resultant chosen format it's way worse than that! I left it processing a 4 minute 1920x1080 AVC+ AAC mkv output while I slept and it did complete. It re-encodes semifinal.avi into final.avi which has the previously converted soundtrack uncompressed WAV files merged into a single output.wav file then combined into that final.avi and THEN it re-encodes the final.AVI into the final lossy compressed chosen output format the best codecs on offer being AVC H264 and AAC for sound. The intermediate rendering and encoding using the obsolete Microsoft Video 1 CRAM codec wrecks any colour or greyscale gradients in the slides as it downsamples the pictures down to 16bit total colour resolution per pixel instead of what is usually at least 24bit per pixel. There is nothing we can do to improve this like changing it to use say HuffYUV lossless codec for ALL the intermediate AVI files AND use DirectShow NOT Video For Windows API so these intermediate pass AVI files are not restricted to 4.0GByte in size...

DeltaVee,

You can add one photo at a time, or add all photos from a specific folder. There are some instructional videos on the publishers website, maybe take a look and you might find that you actually like the software.