Audio sync issues

Discussion in 'AnyStream' started by selenium, Dec 29, 2020.

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  1. selenium

    selenium New Member

    I find it odd that nobody seems to have posted issues with the audio being out of sync with the video.

    I have tried two different computers. One has wired connection with 70Mbs+ connection, and both of sufficient CPU, RAM etc. It happens with both Amazon and Netflix. I have tried recording with nothing else occurring either on the PC or on the network.

    After about 10 minutes the audio goes out of sync by about 1 second. At some point it does resync but it happens off and on throughout the recording.

    It does not happen when I stream directly from the provider.
     
  2. RedFox 1

    RedFox 1 Super Moderator

    I have done extensive testing, over 500 hours of TV shows and movies and I have never experienced this, but that doesn't mean it isn't happening, it's just not happening to me. Please upload a .log file and let us see what's going on.
     
  3. DannyBoi

    DannyBoi Well-Known Member

    happens sometime to mine to :(
     
  4. Mark Heim

    Mark Heim New Member

    this happens to me too.
    when I play a movie downloaded in mp4 it is very (one second) out of sync. I think the mediaplayer mede8er can not reproduce this mp4 file right.
    So I convert it to mkv.
    Now it is from the beginning out of sync but only a few milliseconds. My mediaplayer mede8er can now fix this.
    So I have to click at the beginning of the movie a few times to enjoy.
     
  5. DannyBoi

    DannyBoi Well-Known Member

    its also out of sync in mkv to and on my tv :( really annoying
     
  6. Prospere

    Prospere RedFox Development Team

    I am sorry to know that, but I can't do a thing without logs and titles in question.
     
  7. Watcher0363

    Watcher0363 Well-Known Member

    The first time I encountered this is with the Highlander series. The whole series is slightly to a lot out of sync. Not sure if it is because for some reason the show is released in a wide screen version. When clearly the show was from the 4:3 era of the filming.
     
  8. dead_search

    dead_search New Member

    I bought the life time licence too. And also encountered this with the movie "Bedknobs and Broomsticks" (german version). But I watched the movie on AP too and there the movie was also asynchronous.

    Does AS copy the stream 1:1 or is AS fixing something at the end of the download process?
     
  9. TubeBar

    TubeBar Well-Known Member

    The video and audio is 1:1 from what I can see (by looking at encrypted file vs. AS decrypted) as the size matches, but impossible to compare since obviously they are completely different bytes. AS does repack the streams into a mp4 container, so if there is an error it could be in that part. Have you tried manually demuxing and remuxing w/ something like ffmpeg? I haven't run across this but also haven't checked every file.
     
  10. ZonedOutt

    ZonedOutt New Member

    It seems to be a random sync problem, like some parts of the videos are in sync & then some are out of sync.

    Attached a log file since nobody else seems to be doing so.
     

    Attached Files:

  11. selenium

    selenium New Member

    Unfortunately the videos I downloaded I had already deleted the log files for. I did a new download yesterday and that was completely fine!

    I am wondering if the difference was perhaps the one I downloaded yesterday was a newish film (2014) whereas the previous out of sync files were oldish films ( Back to the Future, National Lampoon). Perhaps a different audio codec?

    Next time I download a video which is out of sync (presumably older film) I will upload the log file.
     
  12. ocd

    ocd Well-Known Member

    I was looking into audio sync on something I tried downloading and ffprobe gave the following warning:

    "Invalid SampleDelta (large negative number) in STTS, at 0 st:2"

    This may be benign, see https://lists.ffmpeg.org/doxygen/2.8/mov_8c_source.html#l02721, but the value doesn't look like a valid timestamp: converted to hex, it's 0x80e8xxxx.

    Do the devs want the astlog for this file? (If so, are astlogs safe to post publicly? Couldn't NF or AZ look at the title and timestamps and identify the user?)
     
  13. Prospere

    Prospere RedFox Development Team

    Yes, please do.
     
  14. Prospere

    Prospere RedFox Development Team

    We can't speak for Netflix or Amazon. However, it is not impossible (given certain amount of effort, of course). If you feel uncomfortable posting your log file here, you could always contact RedFox support at https://www.redfox.bz/support.html
    You will not be able to attach a log there, but you could attach it to your reply to our reply.
     
    whatever_gong82 likes this.
  15. ZonedOutt

    ZonedOutt New Member

    I'm still having this problem, Anybody else??