#2686: Native AAC encoder collapses at high bitrates on some samples -------------------------------------+------------------------------------- Reporter: Kamedo2 | Owner: Type: defect | Status: open Priority: normal | Component: avcodec Version: git-master | Resolution: Keywords: aac | Blocked By: regression | Reproduced by developer: 1 Blocking: | Analyzed by developer: 0 | -------------------------------------+-------------------------------------
Comment (by klaussfreire): v7 patch is attached. It's not commitable or complete yet. I know it was the idea, but I ran out of time, and since you'll be free and needing improvements to test... well... This patch fixes some important bugs regarding RD limit computation in transients. It also has a more robust tonality boost (form factor in this patch) method, which accounts for what psy already does (I noticed it does its own bit). In essence, it was necessary to actually count nonzero lines. This, I believe, is mostly what was wasting bits on speech. Speech still takes more bits, but less. Mahler (brass I guess in general) still sounds artifacty. I think I know how to fix it (and it might indeed fix some other stuff). But I haven't had time to incur there. I haven't had time to see the sample rates issue. So maybe later, you've got it mostly done anyway ;) -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2686#comment:212> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker _______________________________________________ FFmpeg-trac mailing list FFmpeg-trac@avcodec.org http://avcodec.org/mailman/listinfo/ffmpeg-trac