The ivtv (pvr-250/150/350/500) driver can produce TS streams in constant bit-rate. I might have a utility which can do it for you if you are in a bind.
Joe On Tue, 2005-08-02 at 15:30 +0200, Johannes Stezenbach wrote: > On Thu, Jul 28, 2005 sebastien Pastor wrote: > > I ve been asked to produce some Mpeg2-TS output (this output will be > > carried out by our satellite provider). The video sources i have are DV > > files. So i thought i could use ffmpeg to transcode to MPEG2 PS then VLC > > to convert into TS but ... our satellite provider requirements are > > strict : they want : 2500Kb/s rate in CBR.. Using ffmpeg the result is > > not sooo good (many artifacts visible) and even after fiddling around > > with the thousands of mpeg2 options i can t get a good result .... So i > > thought i ve reached the limit of software encoding ... ? > > So here are my questions to you mpeg2 experts : do you think if i move > > to an mpeg2 compression card i should be able to get better results even > > @ low rates with strict CBR ? Would you recommend a card for this > > purpose ? Have heard about the hauppauge 350 card, do you reckon i > > should go for this (even it looks like it is a TV Tuner as well ...) ? > > If yes how could i proceed to make the card compress my DV files (using > > VLC ?) > > I don't know much about mpeg encoding, but I think consumer grade > hardware encoders won't give you the best possible quality, because > they need to encode in real time, but have limited processing power. > > ffmpeg or other encoders should be able to give you better results, but > I think they won't give you strict bitrates even in CBR mode. You would > need to do a few experiments to find a parameter setting to ensure > the maximum bitrate never exeeds your limit, while still using > as much as possible of the available bandwidth, and add some > stuffing later to ensure the reulting stream has strict CBR. > > I don't know if there is an OpenSource tool to do that. Usually the > broadcasters have tools to do that, though. > > HTH, > Johannes > > _______________________________________________ > mpeg2 mailing list > mpeg2@linuxtv.org > http://www.linuxtv.org/cgi-bin/mailman/listinfo/mpeg2 > _______________________________________________ mpeg2 mailing list mpeg2@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/mpeg2
