Lynne 9b11fefb88 aacenc: remove support for AAC Main profile ... The Main profile of AAC is... terrible. It enables the use of delta coding across coefficients of two frames to try to increase compression, and it enabled one more pole for TNS filters. What the AAC authors failed to take into account were basic mathematics, as MDCT leakage (e.g. the spread of each frequency when represented in a discrete spectrum) is significant in most audio codecs. This leads to huge variations between each frame, basically rendering prediction completely pointless. In fact, enabling AAC-Main prediction does not, in general, even recoup the metadata losses from signalling the profile and prediction properties in the first place. So you lose efficiency by using AAC Main. The rumor is that it was put in the AAC spec for patent reasons, though patent-wise, it has about as much use as a patent for a bicycle designed for use by snakes. The only other thing AAC Main changes is it permits 3-pole TNS filters. When AAC's bands are absolutely tiny, except for very high frequency bands, where you're likely to use PNS instead. Just get rid of it.		2025-02-26 17:12:04 +01:00
..
doxy
examples	doc/examples/decode_filter_video: switch to new buffersink options	2024-09-30 09:10:20 +02:00
.gitignore
APIchanges	avutil/log: support logging of date and time information	2025-02-16 15:41:40 +01:00
authors.texi	Use https for repository links	2023-03-01 21:59:10 +01:00
bitstream_filters.texi	doc/bitstream_filters: elaborate on h264_redundant_pps	2024-11-09 10:02:34 -06:00
bootstrap.min.css	doc/html: fix styling issue with Texinfo 7.0	2023-11-08 23:54:23 +01:00
build_system.txt	fate: Add a target for listing failed tests	2024-12-11 14:10:22 +02:00
codecs.texi	doc/codecs: add missing enhancements value for export_side_data	2024-12-02 12:53:54 -03:00
community.texi	doc/community: update conflict of interest rule according to GA vote	2024-04-01 15:38:28 +02:00
decoders.texi	lavc/hevcdec: implement decoding MV-HEVC	2024-09-23 17:15:02 +02:00
default.css
demuxers.texi	avformat/hls: Be more picky on extensions	2025-01-26 01:12:28 +01:00
developer.texi	doc/developer: add examples to clarify code style	2024-11-25 17:17:56 +01:00
devices.texi
doxy-wrapper.sh	doc: fix generating doxy with out-of-tree builds	2021-06-11 19:28:27 +02:00
Doxyfile	doc/Doxyfile: Add FF_PAD_STRUCTURE to PREDEFINED	2022-10-17 09:55:19 +02:00
encoders.texi	aacenc: remove support for AAC Main profile	2025-02-26 17:12:04 +01:00
errno.txt
faq.texi	doc/faq: use texi's @tie instead of 0xA0 for non-breaking space	2024-01-10 19:52:23 +01:00
fate.texi	fate: Add a target for listing failed tests	2024-12-11 14:10:22 +02:00
fate_config.sh.template	fate: Allow running multiple rounds of tests with differing settings	2023-12-19 13:34:25 +02:00
ffmpeg-bitstream-filters.texi
ffmpeg-codecs.texi
ffmpeg-devices.texi
ffmpeg-filters.texi
ffmpeg-formats.texi
ffmpeg-protocols.texi
ffmpeg-resampler.texi
ffmpeg-scaler.texi
ffmpeg-utils.texi
ffmpeg.texi	ffmpeg_demux: add option readrate_catchup	2025-02-24 15:16:59 +05:30
ffmpeg.txt
ffplay.texi	fftools/ffplay: add hwaccel decoding support	2023-11-15 01:20:11 +08:00
ffprobe.texi	fftools/ffprobe: add analyze_frames option for CC and grain detection	2024-12-13 22:41:31 -06:00
ffprobe.xsd	fftools/ffprobe: print lossless frame flag	2025-01-05 22:23:16 +01:00
fftools-common-opts.texi	fftools/opt_common: add time and datetime log flags	2025-02-16 15:41:40 +01:00
filter_design.txt
filters.texi	avfilter/libplacebo: use a transparent default fillcolor	2025-02-19 18:33:21 +01:00
formats.texi	avformat/demux: add duration_probesize AVOption	2024-04-02 19:53:40 +02:00
general.texi	doc/general: move contents into a separate file.	2020-09-08 14:29:19 +02:00
general_contents.texi	avcodec: add ADPCM IMA XBOX decoder	2024-12-22 16:08:33 +11:00
git-howto.texi	doc/git-howto: remove outdated line about gitolite	2024-11-08 15:59:13 +10:00
indevs.texi	avdevice/decklink_dec: extend available actions on signal loss	2024-09-09 23:47:49 +02:00
infra.txt	doc/infra: List at what companies the name servers are hosted and who provides the servers	2024-11-28 23:19:00 +01:00
issue_tracker.txt
lexicon
libav-merge.txt
libavcodec.texi
libavdevice.texi
libavfilter.texi
libavformat.texi
libavutil.texi
libswresample.texi
libswscale.texi
mailing-list-faq.texi	doc/mailing-list-faq: remove dead link	2024-08-14 18:25:37 +02:00
Makefile	doc: use HOSTEXESUF when calling print_options	2024-04-24 00:09:38 +02:00
metadata.texi	doc/muxers: add ffmetadata	2024-03-18 17:59:19 +01:00
mips.txt	doc/mips: Update list of files with MIPS copyright notice	2024-05-27 19:04:08 +02:00
multithreading.txt	avcodec/codec_internal: Remove FF_CODEC_CAP_ALLOCATE_PROGRESS	2024-04-19 13:18:04 +02:00
muxers.texi	libavformat/hlsplaylist: add subtitle_varname for naming subtitle streams	2024-10-13 23:01:59 +08:00
nut.texi
optimization.txt	configure: drop yasm support	2024-10-06 01:32:47 +02:00
outdevs.texi	avdevice: deprecate sdl outdev	2024-02-28 10:28:49 +01:00
patchwork
platform.texi	configure: drop yasm support	2024-10-06 01:32:47 +02:00
print_options.c
protocols.texi	doc/protocols: fix/improve RTP documentation	2025-01-17 23:33:26 +01:00
rate_distortion.txt
resampler.texi	swresample/swresample: add a used channel layout option using the new API	2023-02-19 18:28:45 -03:00
scaler.texi
snow.txt
style.min.css	doc: add styles for good/bad code examples	2024-11-25 17:17:57 +01:00
swresample.txt
swscale.txt
t2h.init
t2h.pm	doc/t2h: Support texinfo 7.1 and 7.2 pretest	2025-02-06 18:00:34 -03:00
tablegen.txt
texi2pod.pl	doc/texi2pod: support @float.	2020-09-08 14:29:19 +02:00
texidep.pl	configure, etc: switch to shebang without space	2024-04-09 16:01:24 +02:00
transforms.md	x86/tx_float: add 15xN PFA FFT AVX SIMD	2022-09-23 12:35:27 +02:00
undefined.txt
utils.texi	avutil/channel_layout: add a 9.1.6 layout	2024-12-13 16:35:47 -03:00
writing_filters.txt	Update missed irc links	2021-06-18 18:58:25 +02:00