Video Timecode

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Why video timecode and blacked tapes are so important

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Video Timecode

  1. 1. Video Timecodes Please download full version to activate animations
  2. 2. Video Timecodes
  3. 3. What is Timecode? <ul><li>When you open a brand new video tape it is completely blank. If you put it in a camcorder and press play, you will get a screen full of static: </li></ul>
  4. 4. What is Timecode? <ul><li>...although many modern camcorders spare us the eyestrain by covering the static with a blue screen: </li></ul>
  5. 5. What is a Timecode? <ul><li>… the tape is completely blank – there is absolutely nothing on it. This creates a problem when we come to record some footage... </li></ul>
  6. 6. What is a Timecode? <ul><li>Basically, a completely blank tape is not primed. It is like painting a window frame without first using undercoat – there’s nothing to bond to : </li></ul>
  7. 7. What is a Timecode? <ul><li>Video editing systems rely on a hidden recording on a tape. This recording is called the timecode . The timecode keeps precise track of where you are on a tape, a bit like a tape counter </li></ul>
  8. 8. What is a Timecode? <ul><li>Timecodes obviously measure time. Here’s what the numbers mean: </li></ul>Hours Minutes Seconds Frames
  9. 9. What is a Timecode? <ul><li>Timecodes obviously measure time. Here’s what the numbers mean: </li></ul>H ours M inutes S econds F rames Timecode is usually expressed as: HH:MM:SS:FF … so in this case: 10:20:28:18
  10. 10. The SMPTE Standard <ul><li>Some timecode trivia… </li></ul><ul><li>This format of timecode is called SMPTE (pronounced ‘simptee’) </li></ul><ul><li>SMPTE stands for S ociety of M otion P icture and T elevision E ngineers </li></ul>
  11. 11. Why Timecodes Matter <ul><li>The good news is that when you make your first recording on a new tape a timecode is recorded automatically : </li></ul>
  12. 12. Why Timecodes Matter <ul><li>The good news is that when you make your first recording on a new tape a timecode is recorded automatically : </li></ul>
  13. 13. The Big Problem <ul><li>This is fine if you are going to make one long recording on a tape. However, if you keep starting and stopping the tape there is a good chance that the timecode will have gaps in it : </li></ul>
  14. 14. The Big Problem <ul><li>This is fine if you are going to make one long recording on a tape. However, if you keep starting and stopping the tape there is a good chance that the timecode will have gaps in it : </li></ul>
  15. 15. The Big Problem <ul><li>Now the bad news : these gaps confuse video editing software and often cause problems when capturing video: </li></ul>
  16. 16. The Solutions <ul><li>There are two solutions to this problem: </li></ul><ul><li>Record black video (ie leave the lens cap on) over the entire tape before you film. This is the professional solution and is known as </li></ul><ul><li>‘ blacking a tape ’ </li></ul><ul><li>Or ensure that you leave the tape recording for at least 10 seconds at both the start and end of a recording. This is not ideal but is often used </li></ul>
  17. 17. Video Timecodes

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