- #NORMALIZE MULTIPLE VIDEO FILES FFMPEG OS X 720P#
- #NORMALIZE MULTIPLE VIDEO FILES FFMPEG OS X INSTALL#
- #NORMALIZE MULTIPLE VIDEO FILES FFMPEG OS X FULL#
- #NORMALIZE MULTIPLE VIDEO FILES FFMPEG OS X ANDROID#
Remember, most devices also have a maximum resolution and bitrate they can handle.
#NORMALIZE MULTIPLE VIDEO FILES FFMPEG OS X ANDROID#
IPhone, iPhone 3G, old low-end Android devices, other embedded players
IPhone 3GS, iPhone 4, iPad, low-end Android phones You should always choose the best profile your target devices support.ĭesktop browsers, iPhone 4S+, iPad 2+, Android 4.x+ tablets, Xbox 360, Playstation 3 Profile constrains H.264 to a subset of features - higher profiles require more CPU power to decode and are able to generate better looking videos at same bitrate. The values in the table were optimized for lecture-type content recorded with SD cameras, so if you want to encode something more dynamic (like Transformers ) ) I suggest you bump the bitrate up a little. Some general resolution/bitrate guidelines that we've found to work well at Viidea: Resolution When choosing bitrate you need to remember, it is directly connected to resolution - storing pictures of certain resolution requires more bits, so if you want higher resolution videos, you'll have to choose higher bitrate for them to not look like garbage.Ī rule of thumb to calculate file size from bitrate is:įilesize (in MB) = (bitrate in Mbit/s * 8) * (video length in seconds) Set too low, it will cause the video to look very blocky (especially in fast-moving scenes) and set too high will make your files excessively large.
It directly determines file size of the video along with the quality.
#NORMALIZE MULTIPLE VIDEO FILES FFMPEG OS X 720P#
Typically people use 360p (that's a shorthand naming made popular by HD televison, meaning picture has height of 360 with width corresponding to wanted aspect ratio), 480p, 720p and 1080p resolutions, as those correspond to common screen sizes, which avoids excessive blurriness.Ĭontrary to popular belief, resolution does not affect file size.īitrate tells the encoder about how many bits should each second of video have. If you choose a low resolution, the video will be small and it will be blurry when users will put it full-screen. Resolution gives “sharpness” to the overall image. Now you'll have to decide on two things - the resolution, bitrate and profile you want those videos in.
Step 2: Choose resolution, bitrate and profile If you already know what “bitrates, profiles etc.” are and just want the command lines skip to step 4 or sample command lines. As I don't use any machines with OS X you'll have to check for yourself.
#NORMALIZE MULTIPLE VIDEO FILES FFMPEG OS X INSTALL#
OS X users: MacPorts should be able to compile and install FFmpeg with libvpx and libx264. Windows users: Zeranoe has great static builds of FFmpeg for Windows with libx264 and libvpx included. Don't forget libx264 for H.264 and libvpx for VP8/WEBM if you want that support. I strongly suggest you use a stable FFmpeg build (that's 0.9 at the moment) instead of git master. Ubuntu users: UbuntuForums has a great guide for compiling newest FFMpeg build. Most distribution builds are very old, buggy and have numerous issues. So here's my guide for encoding web videos using recent FFMpeg versions for Flash and HTML5.
#NORMALIZE MULTIPLE VIDEO FILES FFMPEG OS X FULL#
Web is full of articles about encoding videos with FFmpeg, however most of them are obsolete and use old non-working FFmpeg parameters.
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