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Some (rare) videos encoded with h264 stay black

  • 12 replies
  • 3 have this problem
  • 3415 views
  • آخر ردّ كتبه Harest

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Hi,

It's the second time today i see a video with this codec (as stated by VLC) : H264 - MPEG-4 AVC (part 10) (avc1), that's not visible in Firefox, while it's audible. Here is the video url : https://web.poecdn.com/public/news/2018-05-02/VLS_news.mp4 Previous one that also didn't work : https://web.poecdn.com/public/news/2018-04-17/NewRainofArrows.mp4

Some working with the same codec, still as stated by VLC can be found here : https://www.pathofexile.com/forum/view-thread/2034078 ; Change : Different CDN, no sound in these video. For a direct video link, here's one : https://imgur.com/BySFQ45.mp4

Not sure what's the issue here, if there's something new unsupported in openh264 or if it's just an issue for some users. I know i'm not the only one experiencing it, cf. https://www.reddit.com/r/pathofexile/comments/8csmvo/skill_revamps_part_3/dxhi8f6/

Edit : Seems like Imgur uses x264 (http://www.videolan.org/x264.html) to encode their videos (ftypisom : MP4 Base Media v1 [IS0 14496-12:2003]), while GGG (poecdn) used something else (Mainconcept Video Media Handler ; ftypmp42 : MP4 v2 [ISO 14496-14]).

Edit² : Bug report.

Modified by Harest

All Replies (12)

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I have the same issue. Audio no video.

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Started FF v59 in Safe Mode. Still no video

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Should i submit a bug report for this issue ?

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I called for more help. Wait a few days first.

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Bug 1479203 Some (rare) videos encoded with h264 stay black (audio only)

Well done.

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Did you try the current Firefox release (61) to see whether the videos work with that version? Both videos work for me with the Firefox 61 release (both have picture and sound).

You can check the Web Console to see if there are media related error messages

See also:


I don't think that devs can do much with this bug report. A proper bug report needs steps to reproduce and at least more information about your computer. You can attach your troubleshooting information.

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@Cor-el : I'm on the latest stable firefox release yes, so 61.0.1, and it still doesn't work.

The only step to reproduce i've is to visit the urls i provided. They never worked from ff 59 (and probably even before) to 61, on win7 x64 as stated here. Also troubleshooting info are already available in this thread i assume. Even if it's slightly unaccurate since several months passed since. I added the current info in the bug report.

Modified by Harest

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I tried those very two links and it looks like that site is bandwidth intensive usage that is why the lag is there but the video did run for me. I think your hardware isn't up to task for that feed. So what kinda GPU and CPU and RAM are your specs? The second you said that fail is so bandwidth hog that I think that is what is going on as to why your thinking it failed when it is sucking up so my bandwidth to run it.

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@WestEnd : Definitely not a bandwidth issue for me. It loads pretty quickly, i've a 100/5 Mbits connection. My conf is quite old now so indeed in general i avoid watching anything in 1080p60 as i'll not be able to do much else if i want a steady stream. Conf : Core 2 Quad Q9400 @2.67Ghz, ATI 7870 2 Go, 8 Go RAM, Win7 x64.

The thing is, i didn't mention it in the OP apparently, it works in VLC just fine.

Modified by Harest

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Harest said

@WestEnd : Definitely not a bandwidth issue for me. It loads pretty quickly, i've a 100/5 Mbits connection. My conf is quite old now so indeed in general i avoid watching anything in 1080p60 as i'll not be able to do much else if i want a steady stream. Conf : Core 2 Quad Q9400 @2.67Ghz, ATI 7870 2 Go, 8 Go RAM, Win7 x64. The thing is, i didn't mention it in the OP apparently, it works in VLC just fine.

That "i've a 100/5 Mbits connection." is their theoretical ISP Speed that isn't always true 100% of the time and the site itself can be limited as well. So unless their side is clean 100mbps no interruption or to many task running then there would be no problem but I have Fiber which is far better than Cable and it shows it is bandwidth Hog intensive just to watch the full screen video.

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@WestEnd : I mean, i know when it's my connection or something else ^^. I know how to check the network tab, see when the video is fully loaded (it is before even starting to play it), etc. Their server is kinda slow to deliver the video indeed (38 Mo for a video of 9s), but it's definitely not the issue here. I even downloaded the video when i did this report to check from playing the video locally.

Modified by Harest