How to Convert AVI to FLV in Mac/Win (Yosemite/Windows 8.1 included)

This tutorial shows you the detailed steps on converting AVI files to FLV on Yosemite/Windows 8.1 so that you can play and share the AVI movies conveniently.

Have many AVI files stored in your computer and wanna upload it to the internet for sharing with someone? Modern sites widely use FLV as the format for transmitting video through the internet, so in that case, you would need a tool to convert from AVI into FLV, right?(Learn difference between AVI and FLV) Luckily, most video converters nowadays (like free online converters) will allow you to easily do AVI to FLV conversion, then which is the best and which one is compatible with the latest Yosemite and Windows 8.1?

Convert AVI to FLV

Here you are highly recommended a professional app- Pavtube Video Converter Ultimate(Windows 8.1 compatible) to be your assistant to help you finish the task. In addition to converting AVI movies to FLV, it can also convert AVI to other popular video formats like MP4, M4V, WMV, MOV, etc. with intact video quality. Besides the excellent converting feature, it also supports built-in video editor that allows you to edit video by cropping, trimming, adjusting video effects, adding subtitles, etc. Mac version is iMeida Converter for Mac(Yosemite 10.10 compatible). Read the review here.

Convert AVI to FLV in Mac/Win (Yosemite/Windows 8.1 included)

Step 1. Load AVI video files

Run the program and click "Add Video" to import the AVI videos. You can also directly drag the video clips into the program for conversion. If need, you can check the “Merge into one file” box to join several video clips together.

AVI to FLV Converter

Step 2. Select the output video format


Now you should choose “FLV-Flash Video Format(*.flv)” from Flash Video as the output video format by clicking the "Format" column. Also you can convert AVI to PowerPointDVD player and Kindle Fire HDX.

FLV video format

P.S. This conversion app provides 100+ video presets for Transformer, Galaxy Tab, iPad, Apple TV, Galaxy Tab, Nook HD and more, allowing you to convert AVI movies to fit your different portable media players.


Step 3. Customize the output video (optional)


You can click Edit button to trim your favorite part from the video, crop video frame size, adjust visual effects, add watermarks, subtitles and more to personalize your videos. 

Tip:  If you want to convert AVI for uploading to YouTube, turn to trim option, and choose to reserve the part you need. Just choose the chapter which you need to trim, to set "start time" or "end time", type the portion which you want to save. If the video clips you've trimmed are still longer than 15 minutes, you can choose to split the long video into smaller parts so as to share on YouTube without limit. 

Plus, click the Settings icon, you can adjust the video size, frame rate, bitrate, etc.

FLV video settings

Step 4. Start to encode AVI videos to FLV


When all the settings are OK, you can click the "Convert" button on the main interface to start converting AVI to FLV format on Yosemite/Windows 8.1. After the conversion, you can tap the Open button to locate the converted files and then upload the AVI Video to YouTube, Facebook, etc. simply.

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