This commit adds lossless compression capability to the experimental
branch. The lossless experiment can be enabled using --enable-lossless
in configure. When the experiment is enabled, the encoder will use
lossless compression mode by command line option --lossless, and the
decoder automatically recognizes a losslessly encoded clip and decodes
accordingly.
To achieve the lossless coding, this commit has changed the following:
1. To encode at lossless mode, encoder forces the use of unit
quantizer, i.e, Q 0, where effective quantization is 1. Encoder also
disables the usage of 8x8 transform and allows only 4x4 transform;
2. At Q 0, the first order 4x4 DCT/IDCT have been switched over
to a pair of forward and inverse Walsh-Hadamard Transform
(http://goo.gl/EIsfy), with proper scaling applied to match the range
of the original 4x4 DCT/IDCT pair;
3. At Q 0, the second order remains to use the previous
walsh-hadamard transform pair. However, to maintain the reversibility
in second order transform at Q 0, scaling down is applied to first
order DC coefficients prior to forward transform, and scaling up is
applied to the second order output prior to quantization. Symmetric
upscaling and downscaling are added around inverse second order
transform;
4. At lossless mode, encoder also disables a number of minor
features to ensure no loss is introduced, these features includes:
a. Trellis quantization optimization
b. Loop filtering
c. Aggressive zero-binning, rounding and zero-bin boosting
d. Mode based zero-bin boosting
Lossless coding test was performed on all clips within the derf set,
to verify that the commit has achieved lossless compression for all
clips. The average compression ratio is around 2.57 to 1.
(http://goo.gl/dEShs)
Change-Id: Ia3aba7dd09df40dd590f93b9aba134defbc64e34
Allows building the library with the gcc -pedantic option, for improved
portabilty. In particular, this commit removes usage of C99/C++ style
single-line comments and dynamic struct initializers. This is a
continuation of the work done in commit 97b766a46, which removed most
of these warnings for decode only builds.
Change-Id: Id453d9c1d9f44cc0381b10c3869fabb0184d5966
aligned buffers improve performace. this change brings vpxenc &
vp8_scalable_patterns in line with the other examples.
Change-Id: I4cf9f3e4728b901161905dd7ccb092e774ffb15f
Rather than using the static default maximum keyframe spacing
provided by vpx_codec_enc_config_default() set the default
value to 5 times the frame rate. Five seconds is too long for
live streaming applications, but is a compromise between seek
efficiency and giving the encoder freedom to choose keyframe
locations.
The five second value is from James Zern's suggestion in
http://article.gmane.org/gmane.comp.multimedia.webm.user/2945
Change-Id: Ib7274dc248589c433c06e68ca07232e97f7ce17f
This is the first patch to add superblock (32x32) coding
order capabilities. It does not yet do any mode selection
at the SB level, that will follow in a further patch.
This patch encodes rows of SBs rather than
MBs, each SB contains 2x2 MBs.
Two intra prediction modes have been disabled since they
require reconstructed data for the above-right MB which
may not have been encoded yet (e.g. for the bottom right
MB in each SB).
Results on the one test clip I have tried (720p GIPS clip)
suggest that it is somewhere around 0.2dB worse than the
baseline version, so there may be bugs.
It has been tested with no experiments enabled and with
the following 3 experiments enabled:
--enable-enhanced_interp
--enable-high_precision_mv
--enable-sixteenth_subpel_uv
in each case the decode buffer matches the recon buffer
(using "cmp" to compare the dumped/decoded frames).
Note: Testing these experiments individually created
errors.
Some problems were found with other experiments but it
is unclear what state these experiments are in:
--enable-comp_intra_pred
--enable-newentropy
--enable-uvintra
This code has not been extensively tested yet, so there
is every likelihood that further bugs remain. I also
intend to do some code cleanup & refactoring in tandem
with the next patch that adds the 32x32 modes.
Change-Id: I1eba7f740a70b3510df58db53464535ef881b4d9
The commit added a new command line option --test-decode to vpxenc.
The option enables encoder to decode compressed frames and test recon
buffers from the decode against those from encode for mismatch.
There are a few limitations on this option currently, one of them
being the match test is not done on a number of lagged frames at
the end of an encoding.
Change-Id: I80c29b46dcdcea9f48107a506b235743068862fe
this commit added a command line option to skip first n frames from
input file to facilitate debugging and testing.
Change-Id: I4ffc5f85fa7e193ea4bdee08cb236717de8beef1
The maximum psnr has a marginal impact on the overall output in high
quality encodings, the change will make sure the psnr output to be
consistent with encoder internal stats.
Change-Id: I35cf2f85008ec127a7d91c9eb69fa7811798ae32
Propagate debug setting to the EBML struct. When writing the application
name, this allows us to strip the version code and keep the output
metadata static.
Change-Id: I8e06c6abd743bedbff5af6242bbdae5d55754538
When we do 2-pass encoding, elapsed time is accumulated through
whole 2-pass process, which gives incorrect time and fps results
for second pass. This change fixed that by resetting the time
accumulator for second pass.
Change-Id: Ie6cbf0d0e66e6874e7071305e253c6267529cf20
Produce the token partitions on-the-fly, while processing each MB.
Context is updated at the beginning of each frame based on the
previoud frame's counters. Optimally encoder outputs partitions in
separate buffers. For frame based output, partitions are concatenated
internally.
Limitations:
- enabled just in combination with realtime-only mode
- number of encoding threads has to be equal or less than the
number of token partitions. For this reason, by default the encoder
will do 8 token partitions.
- vpxenc supports partition output (-P) just in combination with
IVF output format (--ivf)
Performance:
- Realtime encoder can be up to 13% faster (ARM) depending on the number
of threads and bitrate settings. Constant gain over the 5-16 speed
range.
- Token buffer reduced from one frame to 8 MBs
Quality:
- quality is affected by the delayed context updates. This again
dependents on input material, speed and bitrate settings. For VC
style input the loss seen is up to 0.2dB. If error-resilient=2
mode is used than the effect of this change is negligible.
Example:
./configure --enable-realtime-only --enable-onthefly-bitpacking
./vpxenc --rt --end-usage=1 --fps=30000/1000 -w 640 -h 480
--target-bitrate=1000 --token-parts=3 --static-thresh=2000
--ivf -P -t 4 -o strm.ivf tanya_640x480.yuv
Change-Id: I127295cb85b835fc287e1c0201a67e378d025d76
Add the ability to specify multiple output streams on the command line.
Streams are delimited by --, and most parameters inherit from previous
streams.
In this implementation, resizing streams is still not supported. It
does not make use of the new multistream support in the encoder either.
Two pass support runs all streams independently, though it's
theoretically possible that we could combine firstpass runs in the
future. The logic required for this is too tricky to do as part of this
initial implementation. This is mostly an effort to get the parameter
passing and independent streams working from the application's
perspective, and a later commit will add the rescaling and
multiresolution support.
Change-Id: Ibf18c2355f54189fc91952c734c899e5c072b3e0
dynamicly assign ARG_CTRL_CNT_MAX and
add check to make sure argument instance
doesnt already exist before creating a duplicate
Change-Id: I4f78a9c5346cda8e812cd89c077afe8996493508
To avoid a dependency on vpx_version.h, call the vpx_codec_version_str()
function and build up the string manually.
Change-Id: Ie650e9b8f2aaaffaa31da5e9ef3b566b972321b4
Since this is the only ABI incompatible change since the last release,
convert it to use the control interface instead. The member of the
configuration struct is replaced with the VP8E_SET_MAX_INTRA_BITRATE_PCT
control.
More significant API changes were expected to be forthcoming when this
control was first introduced, and while they continue to be expected,
it's not worth breaking compatibility for only this change.
Change-Id: I799d8dbe24c8bc9c241e0b7743b2b64f81327d59
Using small values for --buf-sz= in command line causes
floating point exception due to division by zero.
Change-Id: Ibfe2d44db922993a78ebc9a4a1087d9625de48ae
As reported in issue 331, vpxenc encoded incorrect webm file header
on big endian machines. This change fixed that.
Change-Id: I31924ebd476a87f3e88b9b5424540bf781d2b86f
For clips that are near 60fps and have a lot of alt refs, it's possible
that the ring buffer holding the previous frames sizes/pts could wrap
around, leading to a division by zero.
In addition to checking for this condition in the ring buffer loop,
the buffer size is made dependent on the actual frame rate in use,
rather than defaulting to 60, which should improve accuracy at frame
rates >= ~60.
Change-Id: If5a04d6e847316dc5f7504f25c01164cf9332be8
Add the --rate-hist=n option, which displays a histogram with n
buckets for the rate over the --buf-sz window.
Change-Id: I2807b5a1525c7972e9ba40839b37e92b23ceffaf
Add the --q-hist=n option, which displays a histogram with n buckets for
the quantizer selected on each frame.
Change-Id: I59b020c26b0acae0b938685081d9932bd98df5c9
Create a new input parameter to allow specifying
the packed frame stereo 3d format. A default value
of mono will be written in the absence of user
specified input
Change-Id: I576d9952ab5d7e2076fbf1b282016a9a1baaa103
Identified as a possible cause of issue #308, the code was silently
ignoring realloc failures, which would lead to corruption, memory
leaks, and likely a crash. The best we can do in this case is die
gracefully.
Change-Id: Ie5f6a853d367015be5b9712bd742778f3baeefd9
Map an enum to the --end-usage values, so you can specify
--end-usage=cq instead of --end-usage=2. The numerical values still
work for historical scripts, etc, but this is more user friendly.
Change-Id: I445ecd9638f801f5924a71eabf449bee293cdd34
Cast size_t to (unsigned long) and print it with the %lu format
string, which is more portable than C99's explict %zu for size_t.
This truncates on Windows x64 but otherwise works on 32 and 64 bit
platforms. In practice the stats file is unlikely to be so large.
Change-Id: I0432b3acf85fc6ba4ad50640942e1ca4614b21cb
Adds following targets to configure script to support RVCT compilation
without operating system support (for Profiler or bare metal images).
- armv5te-none-rvct
- armv6-none-rvct
- armv7-none-rvct
To strip OS specific parts from the code "os_support"-config was added
to script and CONFIG_OS_SUPPORT flag is used in the code to exclude OS
specific parts such as OS specific includes and function calls for
timers and threads etc. This was done to enable RVCT compilation for
profiling purposes or running the image on bare metal target with
Lauterbach.
Removed separate AREA directives for READONLY data in armv6 and neon
assembly files to fix the RVCT compilation. Otherwise
"ldr <reg>, =label" syntax would have been needed to prevent linker
errors. This syntax is not supported by older gnu assemblers.
Change-Id: I14f4c68529e8c27397502fbc3010a54e505ddb43
The merge includes hooks to for CQ mode and other code
changes merged from the test branch.
CQ mode attempts to maintain a more stable quantizer within a clip
whilst also trying to adhere to a guidline maximum bitrate.
The existing target data rate parameter is used to specify the
guideline maximum bitrate.
A new parameter allows the user to specify a target CQ level.
For normal (non kf/gf/arf) frames, the quantizer will not drop BELOW the
user specified value (0-63). However, in some cases the encoder may
choose to impose a target CQ that is above that specified by the user,
if it estimates that consistent use of the target value is not compatible
with guideline maximum bitrate.
Change-Id: I2221f9eecae8cc3c431d36caf83503941b25e4c1
stats_close() was not freeing memory for
single pass runs. It now takes in arg_passes
to determine when it should free memory.
Change-Id: I6623b7e30b76f9bf2e16008490f9b20484d03f31
Add a new encoder control, VP8E_SET_TUNING, to allow the application
to inform the encoder that the material will benefit from certain
tuning. Expose this control as the --tune option to vpxenc. The args
helper is expanded to support enumerated arguments by name or value.
Two tunings are provided by this patch, PSNR (default) and SSIM.
Activity masking is made dependent on setting --tune=ssim, as the
current implementation hurts speed (10%) and PSNR (2.7% avg,
10% peak) too much for it to be a default yet.
Change-Id: I110d969381c4805347ff5a0ffaf1a14ca1965257
read_frame would incorrectly insert detect->buf into img
for ivf files. detect->position now set to 4 if input file is
detected to be ivf in file_is_ivf to keep this from occuring.
Change-Id: I5e235dd3033985bc62707a35c13af5984620208e
remove warning comment in vpxenc.c: in case of 1x1 picture,
detect_bytes will be equal to '3' and we'll fall back to
RAW_TYPE.
fix read_frame() by tracking the pre-read buffer length
in the struct detect
Change-Id: If1ed86ee5260dcdbc8f9d10da6cbb84a4cc2f151
When the first pts equaled 0 ivfenc was incorrectly increasing the
pts by 1. I changed the pts and last pts to be signed. I also set
the default value of last pts to -1.
Change-Id: I30bcec5af9b16d93fa9e3abbea7764b133e9cd73
Change Ice204e86 identified a problem with bitrate undershoot due to
low precision in the timestamps passed to the library. This patch
takes a different approach by calculating the duration of this frame
and passing it to the library, rather than using a fixed duration
and letting the library average it out with higher precision
timestamps. This part of the fix only applies to vpxenc.
This patch also attempts to fix the problem for generic applications
that may have made the same mistake vpxenc did. Instead of
calculating this frame's duration by the difference of this frame's
and the last frame's start time, we use the end times instead. This
allows the framerate calculation to scavenge "unclaimed" time from
the last frame. For instance:
start | end | calculated duration
======+=======+====================
0ms 33ms 33ms
33ms 66ms 33ms
66ms 99ms 33ms
100ms 133ms 34ms
Change-Id: I92be4b3518e0bd530e97f90e69e75330a4c413fc
The old value 1000 was too low, which caused the effective duration and
frame rate calculation to have an 1% error for typical 30 frame/second
inputs. Symptom of the issue has been that most 2 pass encodings were
undershooting target bit rate by 1% or so for 30 fps input.
Change-Id: Ice204e86f844ceb9ce973456f2b995cc095283cf
Defaulting to 320x240 for raw streams is arbitrary and error-prone.
Instead, require that the width and height be set manually if they
can't be parsed from the input file.
Change-Id: Ic61979857e372eed0779c2677247e894f9fd6160
STDIO streams are opened in text mode by default on Windows. This patch
changes the stdin/stdout streams to be in binary mode if they are being
used for I/O from the vpxenc or vpxdec tools.
Fixes issue #216. Thanks to mw AT hesotech.de for the fix.
Change-Id: I34525b3ce2a4a031d5a48d36df4667589372225b
This eliminates a large set of warnings exposed by the Mozilla build
system (Use of C++ comments in ISO C90 source, commas at the end of
enum lists, a couple incomplete initializers, and signed/unsigned
comparisons).
It also eliminates many (but not all) of the warnings expose by newer
GCC versions and _FORTIFY_SOURCE (e.g., calling fread and fwrite
without checking the return values).
There are a few spurious warnings left on my system:
../vp8/encoder/encodemb.c:274:9: warning: 'sz' may be used
uninitialized in this function
gcc seems to be unable to figure out that the value shortcut doesn't
change between the two if blocks that test it here.
../vp8/encoder/onyx_if.c:5314:5: warning: comparison of unsigned
expression >= 0 is always true
../vp8/encoder/onyx_if.c:5319:5: warning: comparison of unsigned
expression >= 0 is always true
This is true, so far as it goes, but it's comparing against an enum, and the C
standard does not mandate that enums be unsigned, so the checks can't be
removed.
Change-Id: Iaf689ae3e3d0ddc5ade00faa474debe73b8d3395
If --psnr option is enabled vpxenc will output PSNR values for the
entire file. Added a \n before final output to make sure the output
is on its own line. Overall and Avg psnr matches the values written
to opsnr.stt file.
Change-Id: I869268b704fe8b0c8389d318cceb6072fea102f8
MKV requires a unique(ish) TrackID element in the track info header.
Instead of the current hard-coded ID, take a hash of the video track
and use that. This value is not written in the deterministic output
mode, despite being a deterministic value itself, to give flexibility
to change the hash algorithm and not affect bisecting across the
change.
Change-Id: I807fc3ea6d1427a151c3ef703269b67e80aef860
By baking the version number into the output file, a hash of the file
will vary from commit to commit, even if the output is otherwise bit
exact. Add a -D option to suppress this behavior, for use when
bisecting or other debugging.
Change-Id: I5089a8ce5719920ffaf47620fa9069b81fa15673
Requiring the output file to be specified with the -o option opens up
the possibility of supporting multiple input files in the future.
Change-Id: I14c9b75e9b21184b47081e1ccf30cf4c91315964
The new WebM output support should be preferred to IVF, but we can't
change the default behavior of the ivf* tools. There are a few other
default behaviors for these tools that are counterintuitive for
historical reasons, and changing the binary name provides the
opportunity to clean those up as well. This patch takes the first
step by renaming the binaries.
Change-Id: I647008ae37cc352dd27ec1da7ed13489e0609b24
