Proprietary Codec Support (H264, MP3)

[Feko]

Hello,

I'm trying to play audio, using tag and CefSharp. No success so far.
After long searches, seems like I need ffmpegsumo.dll from the same exact version as CEF. (#444)
But, I'm using CEF 3.2526.1359, and as described here: https://codereview.chromium.org/1141703002 , CEF3 now statically links ffmpeg... What is "statically link"? What should I do to be able to play audio?

Thanks in advice!

[Feko]

Just as a test, I tried another release of CefSharp: Release 43, CEF 3.2357.1287
This time, with ffmpegsumo.dll provided by default. Same issue as described in #444 Audio controls appear, but speaker is disabled, and no sound.
Tried downloading CEF release from cefbuilds.com (3.2357.1287.g861c26e_windows32) and using those dlls... same thing. What am I doing wrong?

[amaitland]

What is "statically link"?

The code has been compiled into the libcef.dll, so there is no longer a need for a separate dll.

After long searches, seems like I need ffmpegsumo.dll from the same exact version as CEF. (#444)

Did you try the example URL linked in #444? It plays fine for me?

Just as a test, I tried another release of CefSharp: Release 43, CEF 3.2357.1287

For this release you would require ffmpegsumo.dll

What am I doing wrong?

Are you trying to play audio that requires a proprietary codec? e.g. mp3? Licensing restrictions prohibit CEF/CefSharp from distributing binary's that provide support.

[Feko]

Hi, thanks for your reply :)
Oh sorry, I didn't tried that example, I was working on a test page I've created.
I was trying to play MP3/M4A... After your answer, I tried OGG Vorbis on CefSharp 43 + ffmpegsumo.dll, and it worked just fine!!
But in this project, I really need support to those proprietary formats... How can I achieve that?

Thanks!

[amaitland]

But in this project, I really need support to those proprietary formats... How can I achieve that?

Quite a lot of effort is required. See https://groups.google.com/d/msg/cefsharp/BJLMXl9c204/HMJlp8mZzF0J for a guide (little outdated).

You'd also need to look at acquiring the relevant licenses to use/distribute those codecs.

[jankurianski]

With the expiration of the MP3 patent, MP3 codec support is planned to be included by default in Chromium 62. Therefore it will make its way into CEF and eventually CefSharp (if a contributor is interested in creating a future CefSharp release against 62).

http://magpcss.org/ceforum/viewtopic.php?f=7&t=15066
https://bugs.chromium.org/p/chromium/issues/detail?id=746579

[perlun]

Intresting @jankurianski. I have started working with #2203, and can run CefSharp with CEF 62. But it still claims MP3 support is not available when I check http://www.html5test.com

---

Ah, it turns out it didn't make it for Chromium 62. 😭 😭 😭 I think our best bet then is to recompile CEF from source, backporting https://chromium.googlesource.com/chromium/third_party/ffmpeg/+/6ff143c61bc81049d730872b23e4993ca18080fc to the Chromium 62 branch... 🙁

[jankurianski]

@perlun looks like even to build you would need to wait for https://bugs.chromium.org/p/chromium/issues/detail?id=787575 to be fixed also (linked issue from original MP3 issue). May be easier just to wait until official build of CEF 63 rather than fork CEF and deal with all the maintenance and bug fix merging headaches.