Registered Member
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Hi,
until recently, I used kdenlive version 15.12.3. Now, I upgraded my system and installed a new Ubuntu, with that also a new version of kdenlive, which is now version 19.12.3. With this new version, I suddenly get much larger file sizes when exporting videos. I use the same codecs H.264/AAC and tried different options in the GUI, but resulting file sizes are about twice as large. I am trying to find the reason why this happens, and try to get the old file sizes back. I still have the old config files, so I would like to ask: Is there a way to do export using the exact same settings as I used with the old version? Thanks in advance, Leif |
Registered Member
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Have you tried adjusting the crf setting in the profile of the render dialog? You can also choose a slower speed setting which will afford your computer more time and power to create a similar quality file with better compression.
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Registered Member
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Adjusting crf or speed did not help, unfortunately. So here I analyzed two files with mediainfo, the first one i rendered with the old version of kdenlive, the second one with the new version. For rendering the new file, I chose the same crf as for the old file. The files have the same resolution, same FPS, and very similar duration and content (screencast lecture, white background, few colors). I noticed that the audio stream size is almost the same, but it is the video stream size that differs a lot.
Old file: Video stream size: 3.39 MiB
New file: Video stream size: 44.4 MiB
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Registered Member
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I solved the issue: I downloaded an old version of kdenlive and took the profile named "H.264" and used that in the new version. The file format seems to have changed though, so I used a new profile and only changed the args, and it worked. Here is the profile that works for me now.
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Registered Member
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I am experiencing a similar problem and I am at a loss here. I use the same version of Kdenlive: 19.12.3. The proposed solution does not give good results for me.
My situation is this: - I have created a screencast with OBS. The filesize is 60MB, ca. 26 min. - I have edited this video in Kdenlive: extracted and enhanced the audio, cut out unwanted parts. This results in a video of about 24 min. - After rendering (profile used: Generic (HD for web, mobile devices...)) the resulting file is 225MB and the video quality not nearly as good. I ran ffprobe on the two files, first the OBS-file used as input in Kdenlive:
and the rendered output file:
Does anyone spot what's going on here? Help is much appreciated! Thank you in advance. |
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