i've centos 7. i installed vlc 3, but having this problem, I installed vlc via yum but problem is
not solved. sound is comming but video is not running.

Codec not supported:
VLC could not decode the format "h264" (H264 - MPEG-4 AVC (part 10))

which codec should i install to decode video stream.

First make sure that you have enabled EPEL.
https://www.redhat.com/en/blog/whats...ow-do-i-use-it
Then
If you still have video problems, try this repository:
https://rpmfusion.org/

Again, as with most of your threads over the past TWELVE YEARS, you omit important details. How did you install it?? What command?? What was the output?? What 'problem is not solved'? If it's the *VERY CLEAR* error message of h264/MPEG-4...would that not tell you exactly what you should install??? Did you not read/understand that message???

If you just put "centos 7 h264 codec" into Google, it would give you as the *VERY FIRST HIT*:
https://linuxconfig.org/how-to-insta...centos-7-linux

...instructions on how to do exactly what you need. Did you do any research/show any effort of your own???

@TBOne. You need to calm down! Yes, some people find computers and software confusing, and are not good at finding information, but that's no reason to be rude. I see too much of this sort of thing. I don't know if it's the elitism of an older generation of Linux users (it's common with Debian and Slackware users) or just the intolerance one associates with the USA, but I'm tired of it.

3 members found this post helpful.

Perfectly calm thanks. And there is "not good at finding information", and there is "don't bother looking, and ask for a handout instead". Feel free to check out the OP's posting history for the past *TWELVE YEARS*. Look at the message here...can you honestly say, given what's posted, that there wasn't a search term there? They said:

• CentOS 7
• VLC
• h264
• codec

Just those things give the exact answer. I never mind giving a hand up, but I certainly am tired of giving handOUTS. This isn't a help desk...people need to show some efforts of their own, especially someone who claims to be teaching, has twelve years experience, and is a C/C++ programmer. Not talking about a new user here. Or where the OP asked about codecs eight years ago, with a similar problem, and didn't bother following up:
https://www.linuxquestions.org/quest...-a-4175519394/

...or a similar one from three years ago:
https://www.linuxquestions.org/quest...eo-4175662955/

Spout off about 'intolerance' all you want, but at some point, people need to do at least SOMETHING for themselves. Doing an Internet search just isn't that hard.

2 members found this post helpful.

https://reolink.com/blog/how-to-play-h264-files-in-vlc/

Could the files you have come from a security camera?

H.264 is a widely distributed/known format. Can be in anything from a Matroska format file (MKV) to an MP4 file.
https://en.wikipedia.org/wiki/Advanced_Video_Coding

No matter where they come from, H.264 files need the same codec.

I've usually not had any issue playing files under VLC.
Generally it is the best. However Cento isn't a good base OS since it isn't designed for media.


Read the link I posted for some tips.

https://www.loc.gov/preservation/dig...dd000081.shtml