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Note: good answer on SO: MP4 video not playing on Safari iPhone.

In a blog post, I have a video embedded with <video><source src="..." that works for everyone (Firefox, Chrome, at least on PC / Linux / ...), but it specifically doesn't work on Safari iPhone.

Even if you access the video directly by its link on Safari iPhone, it doesn't work either: example: https://gget.it/io64/h264test13576.mp4

It only displays a gray background.

Any idea what it could be?

It has been encoded by OBS:

Video: MPEG4 Video (H264) 864x550 30fps 1989kbps [V: Video Media Handler (h264 high L3.1, yuv420p, 864x550, 1989 kb/s)]
Audio: AAC 48000Hz stereo 3kbps [A: Sound Media Handler [eng] (aac lc, 48000 Hz, stereo, 3 kb/s)]

OBS settings:

Note: I have aleady read these 3 questions, but without any clue about why the MP4 that I linked here doesn't work:

mp4 H264 video won't play in iPhone safari

H.264 encoded .mp4 not playable on iphone

Mp4 file not playing on Ipad/iPhone

(not a duplicate)

Note: good answer on SO: MP4 video not playing on Safari iPhone.

In a blog post, I have a video embedded with <video><source src="..." that works for everyone (Firefox, Chrome, at least on PC / Linux / ...), but it specifically doesn't work on Safari iPhone.

Even if you access the video directly by its link on Safari iPhone, it doesn't work either, it only displays a gray background.

Any idea what it could be?

It has been encoded by OBS:

Video: MPEG4 Video (H264) 864x550 30fps 1989kbps [V: Video Media Handler (h264 high L3.1, yuv420p, 864x550, 1989 kb/s)]
Audio: AAC 48000Hz stereo 3kbps [A: Sound Media Handler [eng] (aac lc, 48000 Hz, stereo, 3 kb/s)]

OBS settings:

Note: I have aleady read these 3 questions, but without any clue about why the MP4 that I linked here doesn't work:

mp4 H264 video won't play in iPhone safari

H.264 encoded .mp4 not playable on iphone

Mp4 file not playing on Ipad/iPhone

In a blog post, I have a video embedded with <video><source src="..." that works for everyone (Firefox, Chrome, at least on PC / Linux / ...), but it specifically doesn't work on Safari iPhone.

Even if you access the video directly by its link on Safari iPhone, it doesn't work either: example: https://gget.it/io64/h264test13576.mp4

It only displays a gray background.

Any idea what it could be?

It has been encoded by OBS:

Video: MPEG4 Video (H264) 864x550 30fps 1989kbps [V: Video Media Handler (h264 high L3.1, yuv420p, 864x550, 1989 kb/s)]
Audio: AAC 48000Hz stereo 3kbps [A: Sound Media Handler [eng] (aac lc, 48000 Hz, stereo, 3 kb/s)]

OBS settings:

Note: I have aleady read these 3 questions, but without any clue about why the MP4 that I linked here doesn't work:

mp4 H264 video won't play in iPhone safari

H.264 encoded .mp4 not playable on iphone

Mp4 file not playing on Ipad/iPhone

(not a duplicate)

Note: good answer on SO: MP4 video not playing on Safari iPhone.

In a blog post, I have a video embedded with <video><source src="..." that works for everyone (Firefox, Chrome, at least on PC / Linux / ...), but it specifically doesn't work on Safari iPhone.

Even if you access the video directly by its link on Safari iPhone, it doesn't work either: example: https://gget.it/io64/h264test13576.mp4

It only displays a gray background.

Any idea what it could be?

It has been encoded by OBS:

Video: MPEG4 Video (H264) 864x550 30fps 1989kbps [V: Video Media Handler (h264 high L3.1, yuv420p, 864x550, 1989 kb/s)]
Audio: AAC 48000Hz stereo 3kbps [A: Sound Media Handler [eng] (aac lc, 48000 Hz, stereo, 3 kb/s)]

OBS settings:

Note: I have aleady read these 3 questions, but without any clue about why the MP4 that I linked here doesn't work:

mp4 H264 video won't play in iPhone safari

H.264 encoded .mp4 not playable on iphone

Mp4 file not playing on Ipad/iPhone

(not a duplicate)