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audio out of sync after export, can anybody help?
HEy how you doin?,
i have a little problem
i want to export a sequence with h.264 mov file
in the edit everythings seems fine and is on sync, when i export
with h.264 encoder into quicktime it doesn’t. i use the following settings:25fps
720 x 576 (4:3)
aspect ratio: d1/dv pal
bit depth: maximum
no fields
audio: 1 frame interleavepicture quality is really good,audio too
but it seems the longer i playback (in quicktime player) the more the audio gets out of sync…
what i do notice is that the images that are out of sync move a lil bit slower then in the edit softwarecan somebody tell me what i did wrong?
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1 Reply
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I realise this is a really late response but hopefully this answer will help anyone else who’s having the same problem!
Sounds like the original audio file is of a different sample rate to the exported audio. Check the properties of the original audio file (Right click and select properties) and the sample rate will probably be either 44100Hz or 48000Hz. When exporting check the audio settings and make sure you set the sample rate to the same rate (44100 or 48000) as your audio file.
Here are the effects of getting the sample rate wrong:
Original audio – 44100Hz (44.1kHz, CD Quality)
Exported Audio – 48000Hz (48kHz, Pro Video quality)
Result: Exported audio is faster than the original and slightly higher pitchedOriginal audio – 48000Hz (48kHz, Pro Video quality)
Exported Audio – 44100Hz (44.1kHz, CD Quality)
Result: Exported audio is slower than the original and slightly lower pitchedWhat you should do is:
If your original audio is 44100Hz:
Original audio – 44100Hz
Exported audio – 44100Hz
Result – accurate playbackor your original audio is 48000Hz:
Original audio – 48000Hz
Exported audio – 48000Hz
Result – accurate playbackBasically sample rate for audio is like the frame rate for video! If you have 10 frames for every second (fps) but play back 20fps the video will play back twice as fast as it was filmed! Hope this helps!
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