On Tue, Sep 20, 2011 at 4:20 AM, j-b-m <[email protected]> wrote: > Hi. > > Following Kdenlive bug 2318 ( http://kdenlive.org/mantis/view.php?id=2318 ), > I discovered a bug in FFmpeg's argument handling, bug report is here: > > https://ffmpeg.org/trac/ffmpeg/ticket/491 > > The bug was acknowledged, but the answer from an FFmpeg's developer is that > we should use the "vb" option instead of the "b" option to set the video > bitrate (that is compatible with previous versions). > > However, in my tests, the "vb" option works in FFmpeg, but not in MLT: > > ffmpeg -i 00006.MTS -acodec mp2 -vcodec mpeg2video -vb 12000k test.mpg > > gives a high bitrate output clip. > > melt 00006.MTS -consumer avformat:test2.mpg acodec=mp2 vcodec=mpeg2video > vb=12000k > > gives a default low bitrate output clip. > > Dan, do you have an idea if this is easily fixable? Probably related to > AVOption... >
ffmpeg the utility strips off the first character if it is a, v or s and the remainder matches an option name. MLT does not do that, and I am not sure I want to do that. I prefer to report and use the option names straight-up and not do this prefixing and stripping dance. Then, a recent change in libav* is that a single option can apply to multiple codecs and formats. I am not sure where all of this is going. At the end of the day, there is no (and never was) "vb" AVOption - only "b". There used to be a discrete "ab" AVOption. Is that gone now effectively making the API users adopt the 'a' and 'v' prefix dance? I will have to look into this and compare it to what libav is doing. -- +-DRD-+ ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense. http://p.sf.net/sfu/splunk-d2dcopy1 _______________________________________________ Mlt-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/mlt-devel
