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Converting HD 16:9 to SD 16:9

smokinglizard
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Converting HD 16:9 to SD 16:9

Tue Oct 08, 2013 8:31 pm
Hello, everyone!

I apologize if this question's been asked dozens of times before, but how does one go about converting HD video to SD while preserving the aspect ration (i.e., letterboxing) in Kdenlive? Is there a rendering option to do this? I need to render HD video to DVD. Any advice would be very much appreciated.

Thanks!
Norm
User avatar TheDiveO
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Re: Converting HD 16:9 to SD 16:9

Wed Oct 09, 2013 6:02 am
Didn't had to do this myself so far, so take your grain of salt. Why not first rendering to full HD and then using Handbrake to convert to SD?

There's a thread that may be helpful: https://forum.handbrake.fr/viewtopic.php?f=5&t=24247


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capslock
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Re: Converting HD 16:9 to SD 16:9

Wed Oct 09, 2013 6:45 am
Once you have choosen a matching project profile (some HD I suppose) and edited your footage, you can render your video to any of the available options from the render dialog. This may be SD or DVD, mpeg2 or mpeg4 or even HD with some lower bitrate - anything is possible.

If you need several output formats, you may save some time with rendering your video to a lossless format or HD with a high bitrate and then transcode (using any of ffmpeg, handbrake, mencoder, ...) the rendered movie to anything you need. This way effects and transitions, which slow down rendering, have to be computed only once for the lossless master.
smokinglizard
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Re: Converting HD 16:9 to SD 16:9

Fri Oct 11, 2013 2:35 pm
capslock wrote:Once you have choosen a matching project profile (some HD I suppose) and edited your footage, you can render your video to any of the available options from the render dialog. This may be SD or DVD, mpeg2 or mpeg4 or even HD with some lower bitrate - anything is possible.


Thanks, guys, for the replies! It's great to find folks who are so helpful.

I was thinking about doing the above...but will rendering using DVD option preserve the aspect ratio? Or will it smush the video into the 4:3 frame and stretch everything vertically? Or maybe cut the left and right borders? The best solution is letterboxing...otherwise important stuff will get cut out left and right...or get stretched vertically, which is awful.

I guess I just have to try it.

I'll also go check out handbrake.
ttguy
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Re: Converting HD 16:9 to SD 16:9

Mon Oct 14, 2013 12:37 pm
As long as you choose a 16:9 project and 16:9 output render format then your aspect ratio should be fine. You should not need to letterbox it. Output to a 16:9 aspect ratio format and then letterbox it as necessary if you are playing back on a 4:3 device. Let the letterboxing only happen if necessary because you are using a 4:3 viewing platform.
User avatar TheDiveO
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Re: Converting HD 16:9 to SD 16:9

Tue Oct 15, 2013 5:26 am
This is a commercial pay-software for Apple and Windows. Looking at the description I only see sales pitch and nothing that open source software such as handbrake can't do better for less bucks. The original poster works with Kdenlive on a Linux system, so how does a Windows/Apple software help?


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User avatar google01103
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Re: Converting HD 16:9 to SD 16:9

Tue Oct 15, 2013 9:10 am
moderator note: the post referred to by TheDiveO regarding commercial pay-software was removed for violation of forum rules.


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