I uplad the idevice clips directly to the ffmpeg.
#Ffmpeg crf 18 install#
Note: i like 's free and it has commandline so I can create my own interface with php html & js and use it on various machines without the need to install it in every device I use. Maybe I could gain more size/quality with another software? With some extra parameters i can adjust some really old analog videos that are deinterlaced in a really bad way. I'm really happy with the size/quality, I gained an average of 30% in space with no visible quality loss. I really don't remember where, but i read that the ffmpeg is not a good videoconverter.
#Ffmpeg crf 18 software#
Is ffmpeg or another software compatible with CPU+GPU encoding?
so expensive softwares use cuda only for preview purpose. It would be nice to add some more speed to the conversions by using both the gpu and the cpu.but for my understanding they cannot work together? and using only GPU is a drastically quality loss.cpu si more precise, GPU is faster in calculation are too imprecise from what I read. Is ffmpeg (with the setting I use) a good converter to keep the same video quality than the source reducing the space occupied by and average of 30-40% ? Not that I'm not happy with the speed (using quad core's) but i recently read again about cuda opencl and there is also the simple fact that I'm not using other converters than ffmpeg since alot of time.
#Ffmpeg crf 18 mp4#
I convert the audio but keep the ac3 as second audio track mapping the ffmpeg streams.this allows me to watch the mp4 on browsers and mobile devices but I'm able to keep the surround sound to playback on some tv's, advanced media players or devices like apple tv. Some camcorder clips with m2ts already have the avc/h264 compatible codec so i just copy the stream.
movflags +faststart //move the metadata in the front of the video so it loads faster b:a 128k // audio bitrate 128k is like mp3 192k metadata:s:a language=eng // set a language, visible on modern devices refs 4 // preferred on most modern devices level 3.1 // preferred on most modern devices profile:v main // preferred on most modern devices pix_fmt yuv420p // preferred on most modern devices preset veryslow // placebo,slow,fast,ultrafast=big file crf 21 // try different numbers between 18-26 metadata date=THEDATE // set a nice title, visible on modern devices
metadata title=THETITLE // set a nice title, visible on modern devices i INPUTFILE // replace with the input file Said that O'm using the preset at very slow (there is also placebo but the final video file is only 1% smaller in size). ffmpeg allows me to set the -crf (18-24 usually) and -preset (veryslow, fast.) witch allows me to reduce the filesize drastically mantaining the same
some had fixed default export setings, most had a lower video quality at the same filesize. I also tested some of them and personally i could not find the proper export settings or i was not impressed by the results. I read that many expensive video conversion softwares are not able to handle low bitrate videos properly.
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