Exporting Video to Mac has audio out of sync. Any suggestions?

[Catahoula]

Hi,

New to Android and the Forums. I have searched for my issue but not finding any answers and hope you may have some solutions.

I have some 1080 video I shot on my SII. I have transferred the video, which is in mp4 format, via USB from the phone to my Mac. When I play back the audio is out of sync. I have several video players and it occurs on all including some specifically (ivi) for HD playback.

I repeated the transfer on USB as well as Kies Air and same problems.

There is no out of sync issue when I play directly on the SII only once I transfer.

I have also uploaded to YouTube, direct from the phone, but it has not processed on YouTube and I think it has hung up (it has been awhile and only a 215MB file) - may have to redo.

Any ideas on why this is occurring and how to correct it? Thanks in advance for any help!

[Doomed]

Buy a better computer

Mite be the way it's possessed, have you given something like vlc player a try. I know you can adjust the sync on that.

Also try some smaller test videos on the phone, with different settings (VGA, 720HD instead of HD). Also can you try on a different computer and different OS.

[MrPerfect]

Hi,

i have (had) the same problem. Since I have updated my Galaxy S2 to Android version 4.0.x my 720p videos cannot be played with Quicktime, iPhoto or iMovie on my Mac.
The video plays, but the sound is noisy after some seconds and sounds crazy.

I have figured out, that the reason must be a bug in the new Android audio and video formats. The VLC player plays it correctly but says in the message window that there are PTS errors with the audio stream:
main warning: audio output out of sync, adjusting dates (-40112 us)
main warning: not synchronized (-40112 us), resampling
This may be the reason, why Quicktime does not play it correctly.

Based on this i used the VLC player to transcode the audio stream without touching the video. Follow these steps:

1. in VLC open the Streaming/Export Wizard
2. select Transcode
3. select the defective *.mp4 file
(4. Do not transcode the Video - do not set the check box)
5. Select transcode Audio: MPEG 4 Audio and 192 kbit/s
6. Encapsulation Format: select nothing --> MPEG 4 / MP4 should be selected automatically
7. ok, start the transcoding

The transcoded video will have no sound in Quicktime Player :-(
But if you open it in iMovie you can play it correctly and cut it. :-))

If you have multiple files you want to cut it is necessary to write an automation script either using apple script or by writing a bash script:

---------------------------

#!/bin/bash
echo test

vlc="/Applications/VLC.app/Contents/MacOS/VLC"
inputextension="mp4"

for a in *$inputextension; do
$vlc -vvv "$a" --intf=rc --sout "#transcode{acodec=mp4a,ab=192}:standard{access=fi le,mux=mp4,dst=\"${a%.*}_acorrect.$inputextension\ "}" vlc://quit
done

---------------------------

Run this script in a terminal in the folder where the defective *.mp4 files are located.


If somebody has a solution to have also sound in the quicktime player - please post it.

bye, Torsten

[fablepd]

Same problem here with Android 4.0.4 on my Galaxy S2. Is there any update to solve this bad problems ?

Thanks for your attention.
Bye, Fabio.