On Wed, 1 Sep 2021 16:20:08 +1000, Matthew Geier wrote:

>If you don't have all the required 'codecs' one MP4 file may play on your machine while another may not.

>You can also get audio and no video or video and no audio you have one of the decoders but not both.


On Wed, 1 Sep 2021 15:39:56 +1000, Dudley Horscroft wrote:

>Problem with some set ups is that it takes a long time to convert

>the mp4 to an mp3 which is then playable on normal set ups.


On my Windows 10 Pro desktop both MP4s I've uploaded play natively on Firefox, Chrome and Edge.
After download, they play in VLC, arguably the most popular and most versatile video player.
After download, they play in Windows Media Player (yuk!).
They play on my Android Samsung S21 5G (yes, the phone's been vaccinated too!)
I can't find my iPad at the moment so I can't check it in Safari.

I don't know what else to suggest, Dudley, as I can't make the MP4s misbehave or not play. You must have a very non-standard system setup which is odd because looking at your message header I can see that you're using Thunderbird on a Windows x64 machine as your email client, so the files should play ok, as above.

Attached is an image of the very standard settings I use for recoding Sony HD .MTS movie files into web friendly .MP4 files.

Yuri.

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Gallery at https://tinyurl.com/trams4me
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