Hey guys, so I have some videos that were recorded in 720p with a screen recorder awhile ago, but the actual video I was screen recording was a 480p video that had an aspect ratio of 4:3 not 16:9. Anyways, I was wondering if there was a way to convert these videos so that it was just a normal 480p video without the black bars on the side so that the file size would be a lot smaller.
+ Reply to Thread
Results 1 to 6 of 6
Encoded for the same quality the size won't be a whole lot smaller as static black takes next to no bits to encode. However, to remove them just crop them away. You can do that within some programs. Others use AviSynth or VDub for cropping.
...but the actual video I was screen recording was a 480p video that had an aspect ratio of 4:3 not 16:9.
Unless I've misunderstood what you've written. Or you didn't explain clearly.
Alright thanks for the quick response. I have a lot of videos, and if the file size won't change much then I am going to just leave it. Thanks anyways
i would them alone 'as is'
but practice with the screen recorder and learn to set the recorded window sized to the video stream
so your next recordings, will be recorded without any excess black screen area
First you have to check how much you should crop
1st way FFmpeg
First you should know about FFMpeg so if you don't first download it place it in exactly the folder where your video is and then press shift and right click then select open command window here, and in that you could type in these commands.
For that run this command with ffmpeg
ffmpeg -y -i yourvideo -vf cropdetect -f mp4 NUL
then Ctrl+c it. go a bit up there you can see the resolution you should crop with so with that in mind do the next command
ffmpeg -i yourvideo -vf crop="whatever you got from the previous command",scale=-1:480 -acodec copy -crf 18 out.mp4
You should not type what you see in this screenshot but what appears in yours.
Also if your video starts from a black, dark scene you should try this command
ffmpeg -y -i yourvideo -ss 00:00:10 -vf cropdetect -f mp4 NUL (assuming that all gets brightened up from 10 seconds into the video)
Can you please post a sample of that video maybe 5-10 seconds then maybe i could give you a proper command with ffmpeg
2nd way Handbrake
Import your video into handbrake and it automatically do the cropping for you
Last edited by Adithya; 22nd Mar 2016 at 05:36.