MP4 is a container format that can store video, audio and subtitle data (as well as more depending on content). In order to playback MP4 files you need three different things, a splitter (used with playback software to access the actual video and audio data), decoders/codecs/filters and playback software.
Your Samsung Galaxy S4 has its own way to split the MP4 container file to access audio and video data (and control extras like subtitles) and it also comes with built-in video software to playback the MP4 file. However, it does not guarantee that it has installed the appropriate decoders/codecs to playback the MP4 files.
Therefore, to playback MP4 files smoothly on your Samsung Galaxy S4, the most convenient way for to is to convert MP4 files to Galaxy S4 compatible video playback codecs such as MPEG4 or H.264.
You can download and install Samsung Galaxy S4 Video Converter, the program has already includes software to play MP4 files and supports to encode the MP4 files to Galaxy S IV compatible video playback codec MPEG4 and H.264 codec with ease. Samsung Galaxy S4 Video Converter for Mac is for Mac users.
How to convert MP4 to H.264 MP4 for Galaxy S4?
1. Install and run this MP4 to Galaxy S4 converter, run it, add MP4 video into it.
2. Click “Foramt” bar, choose “Common Video > H.264 Video (*.mp4)”
Tip: Befoer the conversion, you can edit the MP4 video, here, you can trim, crop the video for your Galaxy S4. Generally speaking, these default settings will generate files that best suited for watching on Galaxy S4. If you have higher expectations on the final output files, you can click “Settings” button and go to “Profile Settings” window to adjust audio and video parameters. For playing HD movies on Galaxy S4, you can choose “1280 * 720” as output video resolution.
3. Click convert button to start MP4 to Galaxy S4 conversion.
Other guide for playing movies on Galaxy S4
How to watch MKV on Galaxy S4?
How to watch M4V on Galaxy S4?
How to watch WMV on Galaxy S4?
How to watch AVCHD on Galaxy S4?
How to watch iTunes movies on Galaxy S4?
How to watch iTunes music on Galaxy S4?
How to watch DVD on Galaxy S4?
How to watch 1080P movies on Galaxy S4?
How to watch Blu-ray on Galaxy S4?
How to watch Mp4 on Galaxy S4?
Galaxy S4 Video Format