Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

No h.264 playback on youtube

more options

When I try to enable html5 playback on youtube for most firefox browser. I find that h.264 playback is not allowed. Consequently I don't think I can play in 2x. I thought firefox natively adopted h.264 already. Am I mistaken?

When I try to enable html5 playback on youtube for most firefox browser. I find that h.264 playback is not allowed. Consequently I don't think I can play in 2x. I thought firefox natively adopted h.264 already. Am I mistaken?

Asịsa ahọpụtara

Do you have the codecs installed to play H.264 (MP4) videos?

On Windows XP you need to have the media.directshow.enabled set to true on the about:config page.

Gụọ azịza a na nghọta 👍 2

All Replies (3)

more options

Asịsa Ahọpụtara

Do you have the codecs installed to play H.264 (MP4) videos?

On Windows XP you need to have the media.directshow.enabled set to true on the about:config page.

more options

thanks. for whatever reason the problem resolved spontaneously. if i didn't have the codecs to play h.264 (mp4) videos would I have to install them manually? (i have some other computers that have this problem). Where would I get them? are they codecs for firefox or windows as a whole?

more options

out of curiosity i'm on a different computer running windows 7 and i have the same problem. i don't even see the option to enable the line you mentioned in about:config. How do i install the appropriate codecs?