# Png files to mp4

**URL:** <https://discourse.julialang.org/t/png-files-to-mp4/23978>\
**Category:** General Usage\
**Tags:** question\
**Created:** [May 7, 2019, 8:11pm UTC](https://discourse.julialang.org/t/png-files-to-mp4/23978 "2019-05-07T20:11:05Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![stillyslalom](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/stillyslalom/32/45687_2.png) [@stillyslalom](https://discourse.julialang.org/u/stillyslalom)\
**Post date:** [May 8, 2019, 6:53am UTC](https://discourse.julialang.org/t/png-files-to-mp4/23978/6 "2019-05-08T06:53:54Z")

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Unfortunately, VideoIO.jl is only capable of video input, not output (at least as of the last time I checked). See: [https://github.com/JuliaIO/VideoIO.jl/issues/36](https://github.com/JuliaIO/VideoIO.jl/issues/36)  
The most versatile option is, as Tamas mentioned, calling an external program, which is the approach taken by [https://github.com/yakir12/FFmpegPipe.jl](https://github.com/yakir12/FFmpegPipe.jl). If you need more control, you can build your own ffmpeg command pipe as I did [here](https://discourse.julialang.org/t/creating-a-video-from-a-stack-of-images/646/8).

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