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Convert AVI to MP4

Videos which are published on should always be MP4-videofiles with a width of 1024pixels. In this guide you will learn step by step how to convert AVI-files to MP4-files using the software “Mediacoder” and how to calculate and set up the correct resolution.

Preparations

• First you need to download the freeware “Mediacoder” which you can find here:

Press “Get 32-Bit Installer“ to download the right version and install it afterwards.

• You also need the “Nero AAC Codec” which we use to encode the sound. You can download it here:

After downloading and extracting the zip-archive you need to copy the 3 files from the “win32” folder to your “…/Mediacoder/Codecs” folder. You don’t need the other extracted files.

• To load the correct conversion settings you will need the “h264.xml” preset file: PRESETFILELINK_IN_OWL

Save it to any folder where you are able to find it easily.

Conversion

1. Start the Mediacoder.

2. A browser-window will pop up where you should activate the “Do not show this welcome page on next startup” checkmark and then press “Start Mediacoder”.

3. Click on the “Add… Add File” button to chose your video or drag and drop it into the main window.

4. Click on “File/Load Preset“ to load the “h264.xml” file. This will automatically load the correct video and audio settings.

5. Go to the „Picture“-tab and activate the “Resize” checkbox.

6. Calculate the correct resolution for 1024 * X. You can find the resolution of your video in the „Properties“-window to the right of the main window. Divide the second number by the first and multiply it by 1024.

For example: The source file has a resolution of 1600x1164. You divide 1164 by 1600 and multiply it by 1024. The result is 745. Now you can simply put „1024x745“ into the textfield.

If you do not want to calculate the resolution manually you can also use the „Online Aspect Ratio Calculator“ which you can find here:

You can simply put in the source resolution on the left side, 1024 on the upper right side and click on calculate to receive the correct height for the 1024 * X resolution.

Important: If you want to convert several videos at once you have to uncheck the “Global” checkmark on the right-hand side of the resolution-text-field and manually type in the correct resolution for the different videos.

7. Click on the “Start” Button. When the conversion is finished you can find the mp4-video in the same folder and with the same name the source file had.

8. Important: Check the length of the video. It sometimes happens that Mediacoder deletes a part at the end of the video for no apparent reason.

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Convert AVI to MP4

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