The VideoLAN Forums

Nice one. I think there are two issues. The first is as mentioned the demux. The VLC demux does not handle this scenario as well as the avformat demux, dropping frames/freezing rather than just corrupting frames. Secondly, as I am testing on macOS even if you force VLC to use the avformat demux, the...

I have in the past tried to use the Win32Compile page, sometimes it has worked, other times I've had to disable one or two plugins or contribs, but generally when trying to rebuild after grabbing some later VLC code I use to have a feeling of dread that it might not build and there would be some inv...

So a general Q for the devs on this, out of curiosity why does VLC have it's own demuxes for certain types, eg mpegts, mp4, rather than use ffmpegs? Is this a historical thing where the support wasn't previously existing (or good enough) in ffmpeg? Or maybe VLC didn't always use ffmpeg?

Actually, I figured it out - the solution is to force avformat demux instead of letting it use the VLC mpegts. This replicates the mpv behaviour.

Below is an HEVC encoded file that has had 1% of packets (as in 1316 UDP-sized packets of 7 x 188 TS packets) randomly removed from it. When I play this in VLC the behaviour is for the stream to freeze repeatedly, as if it just gives up trying to display any corrupted frames. Sometimes it freezes fo...

I’m curious about this too.

I can’t get libvlc to internally buffer less than about 2-3s of a TS using the imem access input, even with all stream filter cache plugins removed.

Good to hear. I hope the Apple platforms can be supported in an efficient and reliable way.

OpenGL is deprecated on macOS, and isn't the renderer of choice on Windows...

...something I've noticed for a while now is that if you feed the library via the imem callbacks a transport stream, and lets say at some point there is a break in the stream, i.e. the receiver is receiving UDP-sized chunks of 1316 (7 x 188 TS packets) and then misses a number of 1316 chunks, this c...

More specifically, is it used to maintain audio sync at normal playback speed? More generally, if I am using amem and passing audio to SDL2 for output, can I rely on the AV pts being in-sync as passed to the video/audio callbacks without adding any other audio filters, or do I need other filters to ...

In my case it’s a stream received over the internet using a custom protocol but much like HLS in that it sends chunks. I then pass this data into libvlc using imem, although with certain settings of my player app it may buffer a number of chunks before passing them to libvlc. Trying to figure out if...

Thank you very much for that!

More of a general Q - I am trying to understand what each of these do and how they fit in with using the imem callback input. If I remove these plugins then my code still works, so what is their precise purpose, as I cannot find any high level documentation. I observe: - that it tries to use “prefet...

Hi As things stand this plugin forces the S16N format, for reasons I'm not too sure about. There was a TODO comment, so I guess it never got looked at, although it seems quite a trivial change to me. Anyway, I've modified it to work with any format - after all, surely it's up to the audio setup call...

Deleted - will send patch to the mailing list.

I figured out I needed to modify the function EsOutProgramMeta() to propagate the psz_title to the meta too. So the code looks like this: /* */ char **ppsz_all_keys = vlc_meta_CopyExtraNames(p_meta ); info_category_t *p_cat = NULL; if( psz_title || psz_provider || ( ppsz_all_keys[0] && *ppsz...

Not sure what exactly you are asking - it's a custom video player linking to libVLC which uses the imem callbacks to receive data, and a custom vout plugin (vbridge that receives HW surfaces), but the pseudo code is like this: - create media, attach MediaParsed event - create player, attach MediaPla...

I'm using the imem callback interface to feed libVLC the data, and I was hoping to be able to use the above event to read the media track information such as video size, frame rate, codec etc. However, when the above event arrives the track info hasn't been filled in, everything is zero. A short whi...

If someone could point me towards how/where the title gets set to imem:// that would help, I can't find it.

Ok, no problem. I think I saw somewhere in the code it was setting the title meta from the TS stream, so I am guessing imem, file etc later overwrite it. Maybe I will figure out where that happens and disable it for my build.

Thanks.

I can't see such an option. Did you mean --video-title? Wouldn't that just override it to a specific string?

I want it just to pick up the service_name from the TS data.

I'm encoding my source using FFmpeg libraries, output format is TS, and as a test I'm setting the service_name meta to "ServiceNameGoesHere" and service_provider to "ServiceProviderGoesHere". When I look up the corresponding meta data (Title and Publisher) I find Title has been c...

Ok I saw lots of other bug reports in this forum but nevermind I’ve now managed to log a bug report, so feel free to delete this thread.

I would have logged this as a bug on your system but the login page isn't responding for me. This TS file was produced by FFmpeg, and encoded using NVENC HEVC with yadif_cufa used to deinterlace the source file which was a directshow capture in ASF format. https://www.dropbox.com/s/yekpa39j0vpxb01/t...