Video format for mobile

J. Landman Gay jacque at
Thu Apr 9 14:03:26 EDT 2020

On 4/9/20 9:53 AM, Bryan Anderson via use-livecode wrote:
> The .mp4 file spec allows for 3 different audio formats. AAC, MPEG1-Layer1 and MPEG1-Layer2. AAC is by far the most often used audio codec.
> I just made a quick video using each audio codec, and the only one that plays audio in LC is the AAC version (MacOS, LC 9.5.0). To make sure you’re video is the right format, download the sample stack in the bug report at <>. I know that video works, at least on Mac.
> On MacOS. Quicktime is the default player on the Mac still today, but it’s not the same QuickTime from years ago that LC depended on. If “About QuickTime Player” shows version 10.5, you’re on the new one. QuickTime Player 7 uses the deprecated APIs.

I have QT 10.5 and it plays the video. Firefox does too. On Android, Chrome plays it. So it 
looks like LC mobile player could be the problem.

I downloaded the file from your bug report, set a LC player to the filepath on my Mac, and got 
the same empty black screen.

Jacqueline Landman Gay         |     jacque at
HyperActive Software           |

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