Avisynth Sync Audio Video | Audio-Digital.net

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FPS - Avisynth wiki

http://avisynth.nl/index.php/FPS

Changes the frame rate without changing the frame count, causing the video to play faster or slower.. AssumeFPS(clip clip, float fps [, bool sync_audio]) AssumeFPS(clip clip, int numerator [, int denominator, bool sync_audio]) . AssumeFPS(clip clip1, clip clip2 [, bool sync_audio]) AssumeFPS(clip clip1, string preset [, bool sync_audio]) . clip clip / clip1 =

AssumeSampleRate - Avisynth wiki

http://avisynth.nl/index.php/AssumeSampleRate

AviSource("video_audio.avi") # Let's say that this clip loses audio sync: # by the end, the audio is behind by 200 milliseconds.Ar = AudioRate # original audio sample rate dur = AudioDuration # total duration in seconds adj = -0.200 # correction needed (decrease audio duration by 200 msec) # Adjust audio duration: AssumeSampleRate(Round(dur / (dur+adj) * Ar)) # Video and audio …

FindAudioSyncScript - Avisynth wiki

http://avisynth.nl/index.php/FindAudioSyncScript

FindAudioSyncScript. From Avisynth wiki. Jump to: navigation, search. I would like to share this script as an approach to finding the appropriate DelayAudio value to use to correct lip sync errors in video material. It has always been a pain trying to find the right delay offset by simply tweaking the delay and watching the results over and ...

Avisynth+ QTGMC audio out of sync - digitalFAQ Forum

http://www.digitalfaq.com/forum/video-restore/10577-avisynth-qtgmc-audio.html

The issue is that audio is out of sync. In the beginning it's not very noticeable but closer to the end audio is ahead by a few seconds. No such issue on the source file or when souce file is encoded without avisynth. I tried to figure out the reason and I found that Media Player Classic provides this info on the source file (Ctrl + G):

DelayAudio - Avisynth wiki

http://avisynth.nl/index.php/DelayAudio

DelayAudio(clip, float seconds). DelayAudio delays the audio track by seconds seconds.seconds can be negative and/or have a fractional part.. Example: # plays audio half a second earlier DelayAudio(-0.5) PS: if audio loaded from separate file (for example WavSource), it's better do negative delay after AudioDub this clip, or else it may cause problems.

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