Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

Cerca nel supporto

Attenzione alle mail truffa. Mozilla non chiederà mai di chiamare o mandare messaggi a un numero di telefono o di inviare dati personali. Segnalare qualsiasi attività sospetta utilizzando l'opzione “Segnala abuso”.

Ulteriori informazioni

Questa discussione è archiviata. Inserire una nuova richiesta se occorre aiuto.

Does Firefox support .mp4 video?

  • 3 risposte
  • 1 ha questo problema
  • 1 visualizzazione
  • Ultima risposta di WoodyFF

more options

On page https://support.mozilla.org/en-US/kb/html5-audio-and-video-firefox?redirectslug=viewing-html5-audio-and-video&redirectlocale=en-US

I find "AAC and H.264/MPEG-4 AVC are patented audio/video compression formats. They can be viewed in Firefox using built-in OS libraries (so neither Mozilla nor you need to pay a fee) if embedded in the MP4 container format (.mp4, .m4a, .m4p, .m4b, .m4r, .m4v file types)."

But when I create an HTML page with the following HTML5 code:

<!DOCTYPE html>
<html>
<body>
</body>
This is a test of video.
<video src="C:/MyVideoFile.mp4" controls>
</video>
</html>

I get the error "No video with supported format and MIME type found". Does Firefox in fact support .mp4 video? If so, what changes do I need to make in the HTML?

On page https://support.mozilla.org/en-US/kb/html5-audio-and-video-firefox?redirectslug=viewing-html5-audio-and-video&redirectlocale=en-US I find "AAC and H.264/MPEG-4 AVC are patented audio/video compression formats. They can be viewed in Firefox using built-in OS libraries (so neither Mozilla nor you need to pay a fee) if embedded in the MP4 container format (.mp4, .m4a, .m4p, .m4b, .m4r, .m4v file types)." But when I create an HTML page with the following HTML5 code: <pre><nowiki><!DOCTYPE html> <html> <body> </body> This is a test of video. <video src="C:/MyVideoFile.mp4" controls> </video> </html></nowiki></pre> I get the error "No video with supported format and MIME type found". Does Firefox in fact support .mp4 video? If so, what changes do I need to make in the HTML?

Modificato da cor-el il

Soluzione scelta

After further experimentation, the error is due to the path in src. It should be either

<video src="file://C:/MyVideoFile.mp4" controls>

OR

<video src="MyVideoFile.mp4" controls>
if the .mp4 is in the same directory as the HTML file (other relative paths are possible)
Leggere questa risposta nel contesto 👍 0

Tutte le risposte (3)

more options

EDIT: The sample HTML I included got rendered (and there is no such file as MyVideo.mp4). Here it is again, replacing angle brackets with square brackets for visibility: [!DOCTYPE html] [html] [body] /body This is a test of video. [video src="C:/MyVideoFile.mp4" controls] /video /html

more options

See if this helps: Separate Security Issue: Update your Flash Player or remove it using these links; Uninstall Flash Player | Windows {web link} Uninstall Flash Player | Mac {web link}

Note: Windows users should download the ActiveX for Internet Explorer. and the plugin for Plugin-based browsers (like Firefox).

Note: Windows 8 and Windows 10 have built-in flash players and Adobe will cause a conflict. Install the plugin only. Not the ActiveX.

Flash Player Version: 32.0.0.344

https://get.adobe.com/flashpl.183ayer/ Direct link scans current system and browser Note: Other software is offered in the download. <Windows Only>

https://get.adobe.com/flashplayer/otherversions/ Step 1: Select Operating System Step 2: Select A Version (Firefox, Win IE . . . .) Note: Other software is offered in the download. <Windows Only> +++++++++++++++++++++++++++++++++++ See if there are updates for your graphics drivers https://support.mozilla.org/en-US/kb/upgrade-graphics-drivers-use-hardware-acceleration

more options

Soluzione scelta

After further experimentation, the error is due to the path in src. It should be either

<video src="file://C:/MyVideoFile.mp4" controls>

OR

<video src="MyVideoFile.mp4" controls>
if the .mp4 is in the same directory as the HTML file (other relative paths are possible)