MrAH, thanks for the update. It appears that the interface has changed since I posted this. It used to be -b for video bitrate and -ab for audio bitrate, but it has changed to -b:[stream specifier]. The command is slightly incomplete. JasonB Hey buddy, this is great. Do you know how to do this using NodeJS? The results, taking the same x as base and applying cropping, scaling and a filter : With no special options: 95M encoding time: 1m19s.
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With only -b k added, the size dropped to 77M encoding time: 1m17s. With only -preset veryslow and no -b , it became 70M encoding time: 6m14s With both -b k and -preset veryslow , the size becomes 77M K smaller than just -b k. With -preset veryslow -crf 28 , I get a file of 39M which took 5m47s with no visual quality difference to me. Lekensteyn Lekensteyn Rumroedeln Rumroedeln 41 3 3 bronze badges.
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Jimbo Bryant Jimbo Bryant 31 2 2 bronze badges. Hope this helps someone! Sign up or log in Sign up using Google.
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Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. MP4 Converter v2. Convert vob mpeg avi wmv asf and other video to mp4 for play on various devices [ Icecream Media Converter 1.
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Icecream media converter handles video to video audio to audio and video to audio conversion to and from multiple formats [ Convert pdf to jpg bmp gif png tif formats on mac os x pdf to jpg converter for mac is a mac application that fast converts pdf documents to image files like jpg png bmp gif or tiff [ How can I reduce a video's size with ffmpeg? Ask Question. Asked 7 years, 7 months ago. Active 29 days ago. Viewed k times. I haven't used it but the ffmpeg man page shows a -fs option to limit the output size, does something like ffmpeg -i in.
The main issue is which codecs you use.. Many most? You can typically get a tight encoding by using the H. The container and codecs you use is up to you and your phone O Jan 11 '12 at Kevin This wants more parameters for conversion. See this answer. Quoted below for convenience: Calculate the bitrate you need by dividing 1 GB by the video length in seconds. Vicky Chijwani Vicky Chijwani 2, 1 1 gold badge 13 13 silver badges 13 13 bronze badges. This is a four year some time.
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Second command, using -crf 24 took a Have an upvote! Might be good to note that you can now use libx for even more size reduction. Used ffmpeg -i input. It reduced a mb video to 9mb.. Very little change in video quality. Thank you!
Tom Kelly Tom Kelly 4 4 silver badges 6 6 bronze badges. Vicky Chijwani provides the code in the example above. This is better suited to a comment but it was my first activity on this site.
I calculated the target bitrate for BL using the proposed method. Correct or best Answer It is always best to first lower the resolution to the maximum supported by your target display.
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You can lower the resolution more if that is not something that concerns you. If the video doesn't include fast action scenes, you may want to lower the frame rate. John Pankowicz John Pankowicz 1 1 silver badge 5 5 bronze badges. Went from 4Gb to 2Gb with this, thanks!! After the first pass, you'll note that the last line gives you the average bitrate you will use at the next steps Juliano B. Nequirito Juliano B.
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