No I got the link. I guess that preset will most likely remove B frames as they have latency.
For the P-frames, I do want them to get better compression, just not the B frames. Does the zerolatency preset remove all P frames? -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Alex Cohn Sent: Saturday, February 09, 2013 11:24 PM To: This list is about using libavcodec, libavformat, libavutil, libavdevice and libavfilter. Subject: Re: [Libav-user] Problem with using libavcodec with AV_CODEC_ID_H264 On Sun, Feb 10, 2013 at 12:38 AM, Ashwin Chandra - SISA <[email protected]> wrote: > 1. Just as a sanity check, to disable b-frames, I just set the max_bframes > parameter to 0? > 2. If GOP size is 1, wouldn't that always be I frames? No predictional > ones?] You probably missed the link yesterday: http://libav-users.943685.n4.nabble.com/Libav-user-FFmpeg-x264-settings-for-zero-delay-encoding-tp4655209p4655212.html. There is "preset" and "tune" options in ffmpeg, you can set them that way: #include "opt.h" av_opt_set(codecContex->priv_data, "preset", "ultrafast", 0); av_opt_set(codecContex->priv_data, "tune", "zerolatency", 0); where codecContex is AVCodecContext. For other x264 options that isn't presented in ffmpeg you could use "x264opts" option: av_opt_set(codecContex->priv_data, "x264opts", "no-mbtree:sliced-threads:sync-lookahead=0", 0); Regarding P-frames, I thought you wanted to remove them, too. Sincerely, Alex _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
