Video plays in chrome but not in Firefox

Hi Faizal!

Could you please send us a report via our built-in video checker? The way the video checker works is that you need to come in as admin and open the video checker and send us a report about the video. It works on desktops.

Thanks!

You can also use the built-in video checker, take a screenshot of the report and post it here. We never publish private information.

Lucia

Hello Faizal,

the video checker checks the video from one of our servers, it appears your are blocking access to the video when the referring URL doesn’t match your site. It makes the video a bit harder to download. We added that HTTP header and now our video checker should be able to check your videos.

I checked and the video still plays on iPhone with iOS 11 and on Android 6.0, but not on Android 4.4, even when using the latest Google Chrome. So it appears older Android phones don’t send the referrer information for videos.

However that is not the cause of broken playback in Firefox. Here is the debug info from Firefox:

Media resource https://....mp4 could not be decoded, error: Error Code: NS_ERROR_DOM_MEDIA_METADATA_ERR (0x806e0006)
Details: virtual RefPtr mozilla::MP4Demuxer::Init(): Parse MP4 metadata failed

Here is the video information from our video checker:

Mime Type: video/mp4
Format: f4v
Duration: 02:06:39.66
Bitrate: 247 kb/s
Video: Input #0, mov,mp4,m4a,3gp,3g2,mj2
Stream #0:0(eng): Video: h264 (Main), yuv420p(tv), 1280x720 [SAR 1:1 DAR 16:9], 181 kb/s, 15.41 fps, 16 tbr, 1k tbn, 40 tbc (default)
Stream #0:1(eng): Audio: aac (LC), 44100 Hz, mono, fltp, 56 kb/s (default)

Here is the same analysis for some MP4 video which plays:

Mime Type: video/mp4
Format: mp42
Duration: 00:04:38.11
Bitrate: 877 kb/s
Video: Input #0, mov,mp4,m4a,3gp,3g2,mj2
Stream #0:0(und): Video: h264 (Constrained Baseline), yuv420p(tv, bt709), 640x360 [SAR 1:1 DAR 16:9], 743 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
Stream #0:1(und): Audio: aac (LC), 44100 Hz, stereo, fltp, 131 kb/s (default)
Moov position: 98184 bytes

I’m noticing that your video uses strange fps count of 15.41. However the bigger issues seems to be that the Moov position is missing in the analysis.

I had to analyze the whole file with qtfaststart to get it. It’s at 9106904 bytes which might be too much for Firefox. The moov should be at the start of the file (or close to it) to ensure fast video playback start times and compatibility.

Also the format is f4v which might be even bigger issue. I improved our video checker to show a warning about the f4v video format that it won’t play in Firefox. We will see how many reports we get and then adjust our recommendation.

Thanks,
Martin

Hello Faizal,

I removed the link to your website.

Thanks,
Martin