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[Q] Audio stutter in AAC format

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ChungHung.Chen
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Default [Q] Audio stutter in AAC format

Dear Devs,
I have a MKV file with AAC audio, it played smoothly in PC.
But audio has shutters with MX Player ( HW / HW+ / SW are all tested )
Also tested by 3 different android devices, same results.
Could you help to solve this problem?
Here is the AAC file (85MB) which extracted from MKV.
Thanks!!
BR,
Chung-Hung Chen
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CDB-Man
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What are the 4 devices you tested it on?
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ChungHung.Chen
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Originally Posted by CDB-Man View Post
What are the 4 devices you tested it on?
Sorry for typo, tested on 3 devices.

Moto XT910 / CM11-nightly-20140828 w/ stock CM11 kernel
Nexus 7 2012 / stock 4.4.4 w/ stock kernel
Asus ME301T / stock 4.2.1 w/ stock kernel

All tested with lastest version of MX player Pro.
If any other information needed, please let me know.
Thanks.

Sent from my XT910 using XDA Free mobile app
BR,
Chung-Hung Chen
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ChungHung.Chen
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Any progress or need more information?
BR,
Chung-Hung Chen
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bleu8888
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Originally Posted by ChungHung.Chen View Post
Any progress or need more information?
I've checked your .aac file but audio itself played with no lag.
I think this is not audio issue but video issue. Would you send full or part of .mkv file?
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ChungHung.Chen
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Quote:
Originally Posted by bleu8888 View Post
I've checked your .aac file but audio itself played with no lag.
I think this is not audio issue but video issue. Would you send full or part of .mkv file?
Thanks
Hi,
Here is the Test Video.
Which created by latest MKVMerge.
Thanks for your help.
BR,
Chung-Hung Chen
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bleu8888
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Quote:
Originally Posted by ChungHung.Chen View Post
Hi,
Here is the Test Video.
Which created by latest MKVMerge.
Thanks for your help.
It is the problem of .mkv file itself. Audio track contains less frames than video track.
So MX Player is stuttering to keep a/v sync.
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ChungHung.Chen
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Quote:
Originally Posted by bleu8888 View Post
It is the problem of .mkv file itself. Audio track contains less frames than video track.
So MX Player is stuttering to keep a/v sync.
Thanks for your information.
Because my audio track is from another source.
So the root cause is different frame rate of A/V source?
Does any method/tool to fix this issue?
RE-encode whole MKV file?
BR,
Chung-Hung Chen
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bleu8888
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(Last edited by bleu8888; 8th September 2014 at 08:40 AM.)
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Quote:
Originally Posted by ChungHung.Chen View Post
Thanks for your information.
Because my audio track is from another source.
So the root cause is different frame rate of A/V source? -> Yes
Does any method/tool to fix this issue? -> I have no idea. May someone else answer it.
RE-encode whole MKV file? -> Yes. there is no such feature in MX Player to stretch audio frames in realtime.
...
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CDB-Man
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Quote:
Originally Posted by ChungHung.Chen View Post
Thanks for your information.
Because my audio track is from another source.
So the root cause is different frame rate of A/V source? <-- Yes
Does any method/tool to fix this issue? <-- not any simple ways. You could force re-time/timeshift of the audio stream on mux. You could reencode the audio and slow playback speed.
RE-encode whole MKV file?
You should really be asking on a video encoding forum instead. Combining video/audio tracks from different sources is always not a simple task if they differ in any major area, such as length.
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Please hit Thanks when someone helps you out!

The Developer/Owner of MX Player is bleu8888. Please post a thread in the MX Player sub-forum for support.
For bugs or glitches, always include an MX Log Collector report.

I do not answer MX Player questions in PM. Post a thread in the MX Player sub-forum for support.


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