Title: MP4 videos play in browser but not in iOS app (Aruba Drive / Nextcloud)

[Raffaele108]

Hello,

I would like to report an issue regarding the Nextcloud iOS application.

Environment

• Service provider: Aruba Drive Advanced (hosted Nextcloud)
• Devices tested: iPhone and iPad
• Same behavior on both devices
• Access through the official Nextcloud iOS app

Problem
MP4 video files stored on my Aruba Drive account can be played correctly when accessing the service through a web browser (Safari or desktop browser).

However, the exact same files cannot be played from within the Nextcloud iOS application.

The problem occurs on multiple Apple devices, which suggests it is not related to a specific device.

Additional information

• The files are not corrupted.
• Browser playback works correctly.
• The issue affects streaming from the iOS app.
• The same behavior is reproducible on both iPhone and iPad.

Could you please verify whether this is a known issue with the current iOS application or with compatibility between the iOS client and hosted Nextcloud services such as Aruba Drive?

If additional logs or tests are needed, I will be happy to provide them.

Thank you for your support.
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[marinofaggiana]

Hi, do you have a movie file for test ?

[Raffaele108]

Yes, Nextcloud is connected to my Aruba cloud, where I have many MP4 and MP3 files. There are no problems with MP3 files, but MP4 files no longer work. This is a problem for me because I could view the files directly from the browser, but the Nextcloud application allows me to view MP4 files with the subtitles in an .srt file. This is not possible in the browser. So I can always run a test: the video files are identified but not played. I tried this with two different iPad models, even different versions, and with an iPhone. The problem suddenly appeared a week ago. Before, everything worked perfectly on all devices.

[marinofaggiana]

Please send a test file thanks

[Raffaele108]

Where? How? I'm already trying to open some files in the associated cloud like I always do, but they won't open. MP3s and PDFs open, but MP4s won't. I don't know what else I should do.

[Raffaele108]

This is what I see when I try to open a video.

[motherboard1999]

Same as here #3979

[Raffaele108]

Yes, the problem seems to be the same, but I don't know how to fix it. Furthermore, the problem occurred simultaneously on two iPads and an iPhone. I believe there is some incompatibility issue with Apple products. I hope this problem is resolved soon, perhaps with a new version, because this malfunction casts a shadow over an app that used to work perfectly.

[marinofaggiana]

Nextcloud iOS has been using a dual viewer for some versions, so it's a good idea to take advantage of the PIP integration. By default, it tries to open the file with the internal iOS AVPlayer; if it gives an error, switch to VLC.
MP4 files are now well tolerated by AVPlayer, but if they contain a codec that isn't fully compatible, they won't be displayed or will present problems.

For this reason, we've decided to add an option in the "More" menu when the video is ready to play ("Always play with VLC") that forces the player to use VLC, otherwise the file cannot be viewed with both players.

This should solve the problems.

The trial version is available in TestFlight 35.1.0 build 5.

[Raffaele108]

Ho Matteo, Thank you very much for your quick response and for implementing this solution. I really appreciate your work. I am not currently using TestFlight, so I will wait for the App Store release. Could you please let me know if this change will be included in the next public iOS release and, if possible, when you expect it to be available? Otherwise, can you tell me how to proceed with Testflight? I'm not very knowledgeable about these things, so I'd need some guidance, such as how to find the link to install this trial version? Thank you again. Il giorno gio 30 lug 2026 alle 11:22 Marino Faggiana < ***@***.***> ha scritto:

…

*marinofaggiana* left a comment (nextcloud/ios#4209) <#4209 (comment)> Nextcloud iOS has been using a dual viewer for some versions, so it's a good idea to take advantage of the PIP integration. By default, it tries to open the file with the internal iOS AVPlayer; if it gives an error, switch to VLC. MP4 files are now well tolerated by AVPlayer, but if they contain a codec that isn't fully compatible, they won't be displayed or will present problems. For this reason, we've decided to add an option in the "More" menu when the video is ready to play ("Always play with VLC") that forces the player to use VLC. This should solve the problems. The trial version is available in TestFlight 35.1.0 build 5. Screenshot.2026-07-30.alle.11.14.55.png (view on web) <https://github.com/user-attachments/assets/811a9c64-7e86-4001-a23f-d0861b96e59b> — Reply to this email directly, view it on GitHub <#4209?email_source=notifications&email_token=CJ3LKECOHH3DVZKXITG4ROL5HMHTPA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTKMJSHA4TKMZXHE22M4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KYZTPN52GK4S7MNWGSY3L#issuecomment-5128953795>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/CJ3LKEFO4V6VCT5HVJA65AD5HMHTPAVCNFSNUABEKJSXA33TNF2G64TZHM3TKMRYG43TGOB3JFZXG5LFHM2DSOBYGU4DMMBTHGQXMAQ> . Triage notifications, keep track of coding agent tasks and review pull requests on the go with GitHub Mobile for iOS <https://github.com/notifications/mobile/ios/CJ3LKEGIALLHE7MYABJUXB35HMHTPA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTKMJSHA4TKMZXHE22M4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KUZTPN52GK4S7NFXXG> and Android <https://github.com/notifications/mobile/android/CJ3LKEBQLH2KANAHZTZJB335HMHTPA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTKMJSHA4TKMZXHE22M4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2K4ZTPN52GK4S7MFXGI4TPNFSA>. Download it today! You are receiving this because you authored the thread.Message ID: ***@***.***>

[marinofaggiana]

https://testflight.apple.com/join/RXEJbWj9

[Raffaele108]

TestFlight 35.1.0 build 5. Il giorno gio 30 lug 2026 alle 11:45 Marino Faggiana < ***@***.***> ha scritto:

…

*marinofaggiana* left a comment (nextcloud/ios#4209) <#4209 (comment)> https://testflight.apple.com/join/RXEJbWj9 — Reply to this email directly, view it on GitHub <#4209?email_source=notifications&email_token=CJ3LKEBHUWAKVXFPRZBULTD5HMKNJA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTKMJSHEZDEOJWGA3KM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KYZTPN52GK4S7MNWGSY3L#issuecomment-5129229606>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/CJ3LKED7PKYZECJPVV42GLL5HMKNJAVCNFSNUABEKJSXA33TNF2G64TZHM3TKMRYG43TGOB3JFZXG5LFHM2DSOBYGU4DMMBTHGQXMAQ> . Triage notifications, keep track of coding agent tasks and review pull requests on the go with GitHub Mobile for iOS <https://github.com/notifications/mobile/ios/CJ3LKECZ3UKH3ZGIKUHGJJ35HMKNJA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTKMJSHEZDEOJWGA3KM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KUZTPN52GK4S7NFXXG> and Android <https://github.com/notifications/mobile/android/CJ3LKEHB3NTGSBN4UYNJKRD5HMKNJA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTKMJSHEZDEOJWGA3KM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2K4ZTPN52GK4S7MFXGI4TPNFSA>. Download it today! You are receiving this because you authored the thread.Message ID: ***@***.***>

[Raffaele108]

Matteo , I downloaded the trial version but it does not appear as you will see in the screenshot the option always open with VLC TestFlight 35.1.0 build 5. Il giorno gio 30 lug 2026 alle 11:58 raffaele rambaldi < ***@***.***> ha scritto:

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TestFlight 35.1.0 build 5. Il giorno gio 30 lug 2026 alle 11:45 Marino Faggiana < ***@***.***> ha scritto: > *marinofaggiana* left a comment (nextcloud/ios#4209) > <#4209 (comment)> > > https://testflight.apple.com/join/RXEJbWj9 > > — > Reply to this email directly, view it on GitHub > <#4209?email_source=notifications&email_token=CJ3LKEBHUWAKVXFPRZBULTD5HMKNJA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTKMJSHEZDEOJWGA3KM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KYZTPN52GK4S7MNWGSY3L#issuecomment-5129229606>, > or unsubscribe > <https://github.com/notifications/unsubscribe-auth/CJ3LKED7PKYZECJPVV42GLL5HMKNJAVCNFSNUABEKJSXA33TNF2G64TZHM3TKMRYG43TGOB3JFZXG5LFHM2DSOBYGU4DMMBTHGQXMAQ> > . > Triage notifications, keep track of coding agent tasks and review pull > requests on the go with GitHub Mobile for iOS > <https://github.com/notifications/mobile/ios/CJ3LKECZ3UKH3ZGIKUHGJJ35HMKNJA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTKMJSHEZDEOJWGA3KM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KUZTPN52GK4S7NFXXG> > and Android > <https://github.com/notifications/mobile/android/CJ3LKEHB3NTGSBN4UYNJKRD5HMKNJA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTKMJSHEZDEOJWGA3KM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2K4ZTPN52GK4S7MFXGI4TPNFSA>. > Download it today! > You are receiving this because you authored the thread.Message ID: > ***@***.***> >

[marinofaggiana]

Then it already opens in VLC so your file is not decodable.

[Raffaele108]

So, could the problem be something else? The strange thing is that the same problem occurs on multiple devices and multiple versions of Apple products. Il giorno gio 30 lug 2026 alle 12:57 Marino Faggiana < ***@***.***> ha scritto:

…

*marinofaggiana* left a comment (nextcloud/ios#4209) <#4209 (comment)> Then it already opens in VLC so your file is not decodable. — Reply to this email directly, view it on GitHub <#4209?email_source=notifications&email_token=CJ3LKEFJKTQMZ5BNOHCUV2L5HMS2ZA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTKMJSHE4TGNZQG442M4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KYZTPN52GK4S7MNWGSY3L#issuecomment-5129937079>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/CJ3LKECVMEP2N2DPYEPFPNL5HMS2ZAVCNFSNUABEKJSXA33TNF2G64TZHM3TKMRYG43TGOB3JFZXG5LFHM2DSOBYGU4DMMBTHGQXMAQ> . Triage notifications, keep track of coding agent tasks and review pull requests on the go with GitHub Mobile for iOS <https://github.com/notifications/mobile/ios/CJ3LKEABSJCOU76KJX4GNDT5HMS2ZA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTKMJSHE4TGNZQG442M4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KUZTPN52GK4S7NFXXG> and Android <https://github.com/notifications/mobile/android/CJ3LKEGFAJAXNXK7BETS2GT5HMS2ZA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTKMJSHE4TGNZQG442M4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2K4ZTPN52GK4S7MFXGI4TPNFSA>. Download it today! You are receiving this because you authored the thread.Message ID: ***@***.***>