# Audio Problem in Video recording using MP4Writer in iOS.

**URL:** <https://community.wowza.com/t/audio-problem-in-video-recording-using-mp4writer-in-ios/53601>\
**Category:** Wowza GoCoder SDK\
**Tags:** recording\
**Created:** [July 2, 2019, 3:45pm UTC](https://community.wowza.com/t/audio-problem-in-video-recording-using-mp4writer-in-ios/53601 "2019-07-02T15:45:29Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Frederick\_Ackroyd](https://avatars.discourse-cdn.com/v4/letter/f/f05b48/32.png) [@Frederick\_Ackroyd](https://community.wowza.com/u/Frederick_Ackroyd)\
**Post date:** [July 2, 2019, 3:45pm UTC](https://community.wowza.com/t/audio-problem-in-video-recording-using-mp4writer-in-ios/53601/1 "2019-07-02T15:45:29Z")

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Hi Support,

I am facing an issue when video is recorded using MP4Writer in iOS. When we play saved stream on android player its audio is muted but same stream is playing fine on iOS with no audio issue.

I shared a sample video with you in following link:  
[https://ltd-livestream-stg.s3.amazonaws.com/79938322/79938322-1562074128164.mp4](https://ltd-livestream-stg.s3.amazonaws.com/79938322/79938322-1562074128164.mp4)

Can you tell us why are we facing an audio issue on android? Is there some configuration issue on iOS side?

We are waiting for your response.

Regards,

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**Author:** ![Frederick\_Ackroyd](https://avatars.discourse-cdn.com/v4/letter/f/f05b48/32.png) [@Frederick\_Ackroyd](https://community.wowza.com/u/Frederick_Ackroyd)\
**Post date:** [July 3, 2019, 5:46pm UTC](https://community.wowza.com/t/audio-problem-in-video-recording-using-mp4writer-in-ios/53601/2 "2019-07-03T17:46:59Z")

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Hi Rose,

No, This is another issue related to recorded stream using iOS device i-e iPhone7+, iPhone X, iPhone XS Max, when we played recorded stream on Samsung S9+ or any other android devices then audio gets muted. Can you check following [Link](http://ltd-livestream-stg.s3.amazonaws.com/79938322/79938322-1562074128164.mp4) on android video player then you will have the idea about the audio muted issue.

Thanks,

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**Author:** ![Rose\_Power-Wowza\_Com](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/rose_power-wowza_com/32/431_2.png) [@Rose\_Power-Wowza\_Com](https://community.wowza.com/u/Rose_Power-Wowza_Com)\
**Post date:** [July 3, 2019, 5:53pm UTC](https://community.wowza.com/t/audio-problem-in-video-recording-using-mp4writer-in-ios/53601/3 "2019-07-03T17:53:31Z")

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Ok, I’ll look into with the SDK team.

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**Author:** ![Jason\_Tuchler](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/jason_tuchler/32/462_2.png) [@Jason\_Tuchler](https://community.wowza.com/u/Jason_Tuchler)\
**Post date:** [July 5, 2019, 5:38pm UTC](https://community.wowza.com/t/audio-problem-in-video-recording-using-mp4writer-in-ios/53601/4 "2019-07-05T17:38:18Z")

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Hello @Frederick Ackroyd

This sounds likely like an audio codec issue. Can you confirm that you see this issue with multiple iOS devices?

Also what Android device and Android OS version are you testing for playback of this MP4 stream?

Regards,

JasonT

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**Author:** ![Frederick\_Ackroyd](https://avatars.discourse-cdn.com/v4/letter/f/f05b48/32.png) [@Frederick\_Ackroyd](https://community.wowza.com/u/Frederick_Ackroyd)\
**Post date:** [July 10, 2019, 1:20pm UTC](https://community.wowza.com/t/audio-problem-in-video-recording-using-mp4writer-in-ios/53601/5 "2019-07-10T13:20:13Z")

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Hello Jason,

Thanks for your answer. We have never faced the audio codec issue on iOS platform, but we have faced the audio codec issue on android latest devices like Pixel 3XL(Android P), Samsung S10+(Android P), Samsung S9+(Android P), Pixel 2XL(Android P) etc.

Thanks