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<blockquote data-quote="Mike Brown" data-source="post: 207493" data-attributes="member: 1310">Timecode and &quot;clock&quot; are two different things. Timecode merely labels the frames of video with an address, it has nothing to do with playback or record speed. I can shoot 24p footage and label it with 60FPS timecode or on and on and on. This can be as incorrect or as correct as you make it, with no impact on playback or record speed. Often in post production workflows, footage and audio will have many different pieces of timecode metadata.... source timecode, edit timecode, burned in timecode, etc and they can all be different and reference different things.Clock (word clock in audio land.... gen lock, blackburst bi-level or tri-level sync in video land) ensures that fields or frames or samples are taken or reproduced at the same time.Colin, it sounds like to me you need to do a 30FPS to 29.97FPS pull down on your audio to match the video. If the audio is slow then instead do a 29.97 to 30 pull up. DAW&#039;s like ProTools have simple tools to accomplish this.Alternatively you can mess around doing some custom sample rate conversion with some simple stoichiometry. Figure out the percentage difference in length the video is from the audio and then apply the same percentage difference as a pull up/down sample rate conversion. This will bring them perfectly in sync.</blockquote>

[QUOTE="Mike Brown, post: 207493, member: 1310"] Timecode and "clock" are two different things. Timecode merely labels the frames of video with an address, it has nothing to do with playback or record speed. I can shoot 24p footage and label it with 60FPS timecode or on and on and on. This can be as incorrect or as correct as you make it, with no impact on playback or record speed. Often in post production workflows, footage and audio will have many different pieces of timecode metadata.... source timecode, edit timecode, burned in timecode, etc and they can all be different and reference different things. Clock (word clock in audio land.... gen lock, blackburst bi-level or tri-level sync in video land) ensures that fields or frames or samples are taken or reproduced at the same time. Colin, it sounds like to me you need to do a 30FPS to 29.97FPS pull down on your audio to match the video. If the audio is slow then instead do a 29.97 to 30 pull up. DAW's like ProTools have simple tools to accomplish this. Alternatively you can mess around doing some custom sample rate conversion with some simple stoichiometry. Figure out the percentage difference in length the video is from the audio and then apply the same percentage difference as a pull up/down sample rate conversion. This will bring them perfectly in sync. [/QUOTE]

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