Tips to Synchronize Audio and Video

Sometimes you will discover that the videos and audio you recorded are out of sync. What will you deal with these desynchronized videos that you spent hours recording? I found that desynchronized videos unbearable, so here I will show you how to sync video and audio.

It is often the codec issue to sync video and audio in recording process. To choose the right video and audio codec is of great importance. There are two ways to embed audio into video files.

One way is to record video with audio by using screen recording software

Screen Recording Suite enables you to add your own voice to the video via microphone. In order to synchronize video and audio perfectly, you need to pre-set your settings first.

1.Open the “options” dialog box and go to “video file” tag
2.Check the video and audio codec

No matter for video or audio, the higher the codec is, the better the quality. And the size of file will not be larger accordingly. The output video format is Windows Media Video 9 by default which fits perfectly with the audio codec Windows Media Audio 9.2.
For Bitrate, the higher it is, the better the output of image. But the file size will be larger, too. So it is very reasonable to set it as 1500.

3.Enable audio

You can choose to record system sound, microphone or both. The format is output as 256kbps, 44khz, CBR by default. It is also the optimized setting to sync video and audio.

Both video and audio settings are offered plenty of choices to choose from. You can change them to synchronize video and audio excellently. For recording online videos, you’d better choose codec close to the original.

4.Go to the “MSIC” and adjust “Audio Repeater”

You can adjust the buffering time (total buffer) and buffering number (buffers) to make video and audio synchronized. The delay of the audio varies with the buffering time. Buffering number determines the integrality of the audio. It is recommendable to set the priority as high.

Another way is to record video and audio separately

After recording your video, you can use Windows live movie maker to add audio and achieve audio video synchronization.

But you must pay attention to the format of your recorded video. Windows live movie maker supports formats like wmv, mp4, avi etc. Screen Recording Suite records video to wmv by default. You are also able to use its Video Converter to process the video, if necessary.

For audio, it supports many popular audio formats, such as mp3, m4a, wma and so on. If you only want to record voice from microphone, you can use the Sound Recorder on your computer. The audio will be only recorded as wma format.

For an advanced one to record audio from sound card and microphone, Streaming Audio Recorder is a good choice. It is a versatile audio recorder that can record various streaming audio from system and microphone. There are many formats offered, e.g. mp3, wma, aac etc.

Now click “add music” on its interface, and adjust the audio length by dragging the bar, or insert audio files into certain timing to synchronize audio and video.

Written by: Alice Wang on May 8, 2012