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Audio Sync for MP3 and AAC files in AVISynth - Doom9's …
https://forum.doom9.org/showthread.php?t=156200
Audio Sync for MP3 and AAC files in AVISynth. I want to test the sync of decoding mp3 and aac audio sources. I will be using the WAVSource, AVISource, DirectShowSource, NicMPG123Source, bassAudioSource and FFAudioSource API calls when I can. What I found is that when decoding mp3 files, use NicAudio if possible, and DirectShow might work also.
FindAudioSyncScript - Avisynth wiki
http://avisynth.nl/index.php/FindAudioSyncScript
FindAudioSyncScript - Avisynth wiki FindAudioSyncScript I would like to share this script as an approach to finding the appropriate DelayAudio value …
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):
Audio goes out of sync with avisynth+ tfm script - VideoHelp
https://forum.videohelp.com/threads/398625-Audio-goes-out-of-sync-with-avisynth-tfm-script
Audio goes out of sync with avisynth+ tfm script. The filters work pretty good on the video but the audio goes out of sync. After the filters have done the work obviously the video's actually shorter than it was by a long way so the audio ends up overrunning it. Being a beginner at all this I'm in way over my head at this point as my previous ...
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 …
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.
FPS - Avisynth wiki
http://avisynth.nl/index.php/FPS
Audio will remain synchronized, although the length of the audio data may slightly differ from that of the video data after the conversion. This is because the output can only contain an integer number of frames. This effect will be more pronounced for shorter clips. The difference in length should be ignored.
DirectShowSource - Avisynth wiki
http://avisynth.nl/index.php/DirectShowSource
Troubleshooting video and audio problems AviSynth will by default try to open only the media it can open without any problems. If one component cannot be opened it will simply not be added to the output. This will also mean that if there is a problem, you will not see the error.
Audio sync issue with capture device and SVP 'Auto ...
https://www.svp-team.com/forum/viewtopic.php?id=1835
I am capturing via a USB capture device and experiencing major audio sync the more threads I set SVP to use. At 2 threads there is no discernible issue, but at Auto (which I think means 8 threads in my case) the audio leads the video by something like 750ms. I'm using MPC-HC, SVP-core, ffdshow and AVIsynth.
Convert VFR to CFR using Avisynth - Thoughts on InfoTech
https://griffeltavla.wordpress.com/2013/01/18/convert-vfr-to-cfr-using-avisynth/
Dump the audio of your clip (the simpson episode) to a wave-file (often called demuxing). 2. Encode the audio to whatever format you’d like, for example AAC. 3. Load the clip into avisynth using ffmpegsource with the timecodes option as in my posted example. 4. (Optional) Do any post processing you’d like (like deinterlacing). 5.
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