Original 2012-11-16, Updated 2016-04-05: cleanup and information about overlaying images.
- For Mac it can be downloaded using fink. Mpeg: To convert images to an mpeg movie it is necessary to also install mpeg2encode, which is available from the same places (note, this may be in the 'unstable' branch of fink). To convert a series of numbered ppm files to an mpg movie: convert -delay 6 -quality 95 test.ppm movie.mpg.
- The timings on a Mac system were as follows: 'animate41.ncl' - 163.0 seconds 'animate42.ncl' - 129.8 seconds. Click on thumbnail image for an animation. The animation was created by generating a series of PNG images, and then calling: convert animate.00.png animate4.gif.
- MNG is an extension to PNG that does; it was designed by members of the PNG Group. MPEG-4 Part 14 or MP4 is a digital multimedia format most commonly used to store video and audio, but can also be used to store other data such as subtitles and still images.
- Make a Transparent Image (PNG or GIF) Easily with Preview for Mac OS X Jan 27, 2013 - 27 Comments It’s extremely easy to make an image transparent with the help of Preview app, the built-in image editing app that comes along with all Macs with Mac OS X.
Video Converter for Mac is the user-friendly software that converts from MOD to QuickTime.MOV file on Mac, and any other format to just about other major of formats you want. A group of device presets available to convert your videos for playback on your portable device with right size.
Rar file converter for mac. When using ffmpeg to compress a video, I recommend using the libx264 codec, from experience it has given me excellent quality for small video sizes. I have noticed that different versions of ffmpeg will produce different output file sizes, so your mileage may vary.
To take a list of images that are padded with zeros (
pic0001.png
, pic0002.png
…. etc) use the following command:where the %04d means that zeros will be padded until the length of the string is 4 i.e
0001
…0020
…0030
…2000
and so on. If no padding is needed use something similar to pic%d.png
or %d.png
.-r
is the framerate (fps)-crf
is the quality, lower means better quality, 15-25 is usually good-s
is the resolution-pix_fmt yuv420p
specifies the pixel format, change this as needed
the file will be output (in this case) to:
test.mp4
Specifying start and end frames
-start_number
specifies what image to start at-vframes 1000
specifies the number frames/images in the video
Little Mac Png
Overlaying image on video
Assuming that you have an overlay image that is the same size as the video, you can use the following command to add it during the ffmpeg compression process.
~/path_to_overlay.png
is the full/relative path to the overlay image[0:v][1:v]
joins the two video streams together, stream 1 is the set of images, stream 2 is the overlay fileoverlay=0:0
specifies the position of the overlay, in this case the overlay image is assumed to be the same size as the video so no offset is needed. The offset is specified asoverlay=x:y
where x is the x offset in pixels and y is the y offset in pixels
You can use this technique to overlay multiple files on top of each other, or even have a dynamic overlay.
-filter_complex
is a really flexible command and can do much much more than is shown here. See the ffmpeg filters documentation for more information.Adding a mp3 to a video
Adding sound to a video is straightforward
-i MP3FILE.mp3
The audio filename-acodec copy
Copies the audio from the input stream to the output stream
Converting a video to mp4 from a different format
![Mac png editor Mac png editor](https://infoidevice.fr/wp-content/uploads/2011/12/Up-–-Flying-Away.jpg)
If the video has already been compressed the following can be used to change the codmpression to h264:
Playback Issues for Quicktime/Other Codecs
Quicktime and some other codecs have trouble playing certain pixel formats such as 4:4:4 Planar and 4:2:2 Planar while 4:2:0 seems to work fine
Add the following flag to force the pixel format:
Mac Png Editor
Finer Bitrate control (to control size and quality)
you can use the -b flag to specify the target bitrate, in this case it is 4 megabits per second
Using -vpre with a setting file
![Convert svg to png mac Convert svg to png mac](https://is4-ssl.mzstatic.com/image/thumb/Music111/v4/59/e8/fa/59e8fa6a-5abf-d61a-f1af-f70fa5db2bd3/Friday13th_Prt1-8_2000x3000.jpg/1200x630bb.png)
Convert Webp To Png Mac
-vpre
is the quality setting, better quality takes longer to encode, some alternatives are: default, normal, hq, max. Note that the -vpre
command only works if the corresponding setting file is available.