Hello, I am trying to benchmark Dirac against Theora. As source I am using the first few minutes of Elephants Dream.
I am trying to encode the video with the help of GStreamer and libschroedinger. At the moment, my encoding command looks like this: #SMALLEST - produces 5,6 MB outputfile in rather bad quality, much worse than theora, but 2,4 MB smaller than theora gst-launch multifilesrc location=raw_png_360/%05d.png index=1 \ caps="image/png,framerate=30/1,pixel-aspect-ratio=1/1" ! \ pngdec ! ffmpegcolorspace ! video/x-raw-yuv,format=\(fourcc\)I420 ! \ schroenc \ enable-phasecorr-estimation=true enable-hierarchical-estimation=false \ rate-control=1 bitrate=500000 ! \ oggmux ! progressreport ! filesink location=ed_dirac.ogg As you can see, I am using the following options for schroedinger encoder: enable-phasecorr-estimation=true enable-hierarchical-estimation=false rate-control=1 bitrate=500000 That gives me a file with rather bad quality, worse than Theora. I am trying to produce a file, that has nearly the same size than the video encoded with Theora but with better quality. To get a bit better quality, i tried to use a flexible bitrate, but here i get confused with the options: schroenc offers the options min-bitrate and max-bitrate. So I tried using them the following way: However that gives me a 152,8 MB file (of course in much better quality). However I didn't expect that it grows that big. I tried several combination but it seems like, that setting min-bitrate/max-bitrate leads to a much greater file. I somehow think thats because of the rate-control parameter. I don't really understand which effect it has. Can you tell me what it does mean? Or how I can use min-bitrate/max-bitrate correctly? Of course, any suggestions how to increase the quality of the encoded video are welcomed :). But i can't use dirac-research, as the encoded video produces a video that can't be properly decoded with schroedinger (at least with the ubuntu package). Thanks in advance! _______________________________________________________________________ EINE FÜR ALLE: die kostenlose WEB.DE-Plattform für Freunde und Deine Homepage mit eigenem Namen. Jetzt starten! http://unddu.de/[EMAIL PROTECTED] ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Schrodinger-devel mailing list Schrodinger-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/schrodinger-devel
