Hi, Why using a file as intermediate transport and not some network stream. Vlc can play a rtsp or raw ts stream without problem. And what is the purpose of ffmpeg (iow can't it be done by vlc itself) Marc
On November 11, 2024 9:08:24 AM GMT+01:00, Bo Berglund via lazarus <lazarus@lists.lazarus-ide.org> wrote: >I have created a video player/editor based on PasLibVlc some 5-6 years ago and >it works for the original purposes. This is on Windows 10. It was created to >handle mp4 files, but it can open other video file formats as well, thanks to >the VLC back-end. > >Now I have a new use which it cannot perform properly: > >In order to be able to view an Internet video stream when it is being >downloaded >using ffmpeg I could not use mp4 format since such a file is not playable until >it has been closed by ffmpeg. At close ffmpeg writes crucial information to the >file which allows playback. > >So I tested to set the ffmpeg output format to be a ts (transport stream) file >which I want to view before the download ends. This type of file should be >playable at all times. > >But if I open the file for viewing the PasLibVlc library reads the current >length at that time into some internal property, which never changes... > >I.e. the length of the playing video is not increasing as the donwnload >progresses. > >This means that only that part which was present at the time of opening the >file >for viewing will be available since the player exits when it reaches the >percieved "end". > >I have tried adding a refresh function to my player but it does not work. > >And it does not even help to close and re-open the video file, somehow the >information has been cached somewhere and the old length data reappears. > >The only way I have found to actually get a new length is to open a completely >different video file and then re-open the original file, then the length >updates... > >So it seems like there is some caching being done by VLC, which affects playing >of the same file and giving the erroneous file length.... > >QUESTION: >--------- >So my question is if I would try to use the LazVlc package instead of >PasLibVlc, >is there a command to clear any cached VLC data so a re-opening of a file >during >recording will get the correct current length of it? > > >Notice that the VLC Player itself behaves in the same way, open the ts file at >some time and note the length, then close it, wait a bit and then re-open the >file and the OLD length is again shown! > >So I cannot use that player either, I need to build my own viwer if the >existing >player/editor cannot be made to work for this scenario... > > -- _______________________________________________ lazarus mailing list lazarus@lists.lazarus-ide.org https://lists.lazarus-ide.org/listinfo/lazarus
