1. 11 Apr, 2010 1 commit
  2. 07 Apr, 2010 1 commit
  3. 05 Apr, 2010 1 commit
    • Fiona Glaser's avatar
      Massive cosmetic and syntax cleanup · 58d2349d
      Fiona Glaser authored
      Convert all applicable loops to use C99 loop index syntax.
      Clean up most inconsistent syntax in ratecontrol.c, visualize, ppc, etc.
      Replace log(x)/log(2) constructs with log2, and similar with log10.
      Fix all -Wshadow violations.
      Fix visualize support.
      58d2349d
  4. 31 Mar, 2010 1 commit
  5. 27 Mar, 2010 7 commits
    • Fiona Glaser's avatar
      New "superfast" preset, much faster intra analysis · 0b720fee
      Fiona Glaser authored
      Especially at the fastest settings, intra analysis was taking up the majority of MB analysis time.
      This patch takes a ton more shortcuts at the fastest encoding settings, decreasing compression 0.5-5% but improving speed greatly.
      Also rearrange the fastest presets a bit: now we have ultrafast, superfast, veryfast, faster.
      superfast is the old veryfast (but much faster due to this patch).
      veryfast is between the old veryfast and faster.
      faster is the same as before except with MB-tree on.
      
      Encoding with subme >= 5 should be unaffected by this patch.
      0b720fee
    • Fiona Glaser's avatar
      Add tune for still image compression · aad44376
      Fiona Glaser authored
      There has been some demand for this from companies looking to use x264 for still image compression (it can outperform JPEG or JPEG-2000 by a factor of 2 or more).
      Still image compression is a bit different; because temporal stability isn't an issue, we can get away with far more powerful psy settings.
      aad44376
    • Fiona Glaser's avatar
      Document slow/fast firstpass in --fullhelp · e4404fa3
      Fiona Glaser authored
      e4404fa3
    • Alexander Strange's avatar
      Reformat profile restrictions in --fullhelp. · 639b18a6
      Alexander Strange authored
      Put "no interlaced", "no lossless" on their own line to avoid them
      running into the default options list.
      639b18a6
    • Fiona Glaser's avatar
      "CRF-max" support with VBV · 7ff23daa
      Fiona Glaser authored
      This is a rather curious feature that may have more use than is initially obvious.
      In CRF mode with VBV enabled, CRF-max allows the user to specify a quality level which the encoder will never go below, even due to the effects of VBV.
      This is not the same as qpmax, which is not aware of issues like scene complexity.
      Setting this WILL cause VBV underflows in any situation where the encoder would have needed to exceed the relevant CRF to avoid underflow.
      
      Why might one want to do this even if it would cause VBV underflows?
      In the case of streaming, particularly ultra-low-latency streaming, it may be preferable to drop frames than to display frames that are of too low a quality.
      Thus, in extremely complex scenes, rather than display completely awful video, the streaming server could simply drop to a lower framerate.
      Scenecuts, which normally look terrible under situations like single-frame VBV, could be handled by just displaying them a bit later and dropping frames to compensate.
      In other words, it's better to see the scenecut 150ms delayed than for it to look like a blocky mess for 150ms.
      
      On the caller-side, this would be handled by detecting the output size of x264's frames and dropping future frames to compensate if necessary.
      
      This can also be used in normal encoding simply to ensure that VBV does not hurt quality too much (at the cost of potentially causing underflows).
      This can help quite a lot when using single-frame VBV and sliced threads, where VBV can often be somewhat unstable.
      7ff23daa
    • Kieran Kunhya's avatar
      Blu-ray support: NAL-HRD, VFR ratecontrol, filler, pulldown · bb9b16b4
      Kieran Kunhya authored
      x264 can now generate Blu-ray-compliant streams for authoring Blu-ray Discs!
      Compliance tested using Sony BD-ROM Verifier 1.21.
      Thanks to The Criterion Collection for sponsoring compliance testing!
      
      An example command, using constant quality mode, for 1080p24 content:
      x264 --crf 16 --preset veryslow --tune film --weightp 0 --bframes 3 --nal-hrd vbr --vbv-maxrate 40000 --vbv-bufsize 30000 --level 4.1 --keyint 24 --b-pyramid strict --slices 4 --aud --colorprim "bt709" --transfer "bt709" --colormatrix "bt709" --sar 1:1 <input> -o <output>
      
      This command is much more complicated than usual due to the very complicated restrictions the Blu-ray spec has.
      Most options after "tune" are required by the spec.
      --weightp 0 is not, but there are known bugged Blu-ray player chipsets (Mediatek, notably) that will decode video with --weightp 1 or 2 incorrectly.
      Furthermore, note the Blu-ray spec has very strict limitations on allowed resolution/fps combinations.
      Examples include 1080p @ 24000/1001fps (NTSC FILM) and 720p @ 60000/1001fps.
      
      Detailed features introduced in this patch:
      
      Full NAL-HRD compliance, with both VBR (no filler) and CBR (filler) modes.
      Can be enabled with --nal-hrd vbr/cbr.
      libx264 now returns HRD timing information to the caller in the form of an x264_hrd_t.
      x264cli doesn't currently use it, but this information is critical for compliant TS muxing.
      
      Full VFR ratecontrol support: VBV, 1-pass ABR, and 2-pass modes.
      This means that, even without knowing the average framerate, x264 can achieve a correct bitrate in target bitrate modes.
      Note that this changes the statsfile format; first pass encodes make before this patch will have to be re-run.
      
      Pulldown support: libx264 allows the calling application to specify a pulldown mode for each frame.
      This is similar to the way that RFFs (Repeat Field Flags) work in MPEG-2.
      Note that libx264 does not modify timestamps: it assumes the calling application has set timestamps correctly for pulldown!
      x264cli contains an example implementation of caller-side pulldown code.
      
      Pic_struct support: necessary for pulldown and allows interlaced signalling.
      Also signal TFF vs BFF with delta_poc_bottom: should significantly improve interlaced compression.
      --tff and --bff should be preferred to the old --interlaced in order to tell x264 what field order to use.
      
      Huge thanks to Alex Giladi and Lamont Alston for their work on code that eventually became part of this patch.
      bb9b16b4
    • Yusuke Nakamura's avatar
      Timecode input/output · 4d3c4787
      Yusuke Nakamura authored
      --tcfile-in allows a user to specify a timecode v1 or v2 file to override input timestamps.
      Useful for dealing with VFR input, especially when FFMS/LAVF support isn't available.
      --tcfile-out writes a timecode v2 file containing the timecodes of the output file.
      New --timebase option allows a user to change the stream timebase.
      Intended primarily for forcing timebase with timecode files if necessary.
      When using --seek, note that x264 will seek in the timecode file as well.
      4d3c4787
  6. 24 Feb, 2010 1 commit
  7. 23 Feb, 2010 4 commits
  8. 15 Feb, 2010 1 commit
  9. 30 Jan, 2010 3 commits
    • Yusuke Nakamura's avatar
      Fix regression in r1406 · a424adb4
      Yusuke Nakamura authored
      Bitrate was printed incorrectly for some input framerates.
      a424adb4
    • Fiona Glaser's avatar
      Fix abstraction violations in x264.c · 0d387291
      Fiona Glaser authored
      No calling application--not even x264cli--should ever look inside x264_t.
      0d387291
    • Yusuke Nakamura's avatar
      Improve DTS generation, move DTS compression into libx264 · afc36d0b
      Yusuke Nakamura authored
      This change fixes some cases in which PTS could be less than DTS.
      
      Additionally, a new parameter, b_dts_compress, enables DTS compression.
      DTS compression eliminates negative DTS (i.e. initial delay) due to B-frames.
      The algorithm changes timebase in order to avoid duplicating DTS.
      Currently, in x264cli, only the FLV muxer uses it.  The MP4 muxer doesn't need it, as it uses an EditBox instead.
      afc36d0b
  10. 28 Jan, 2010 1 commit
  11. 21 Jan, 2010 1 commit
    • Fiona Glaser's avatar
      Add support for multiple --tune options · eba30280
      Fiona Glaser authored
      Tunes apply in the order they are listed in the case of conflicts.
      Psy tunings, i.e. film/animation/grain/psnr/ssim, cannot be combined.
      Also clarify --profile, which forces the limits of a profile, not the profile itself.
      eba30280
  12. 14 Jan, 2010 5 commits
    • Fiona Glaser's avatar
      Make --fps force CFR mode · 0b73a76e
      Fiona Glaser authored
      0b73a76e
    • Fiona Glaser's avatar
      Fix free callback, add x264_encoder_parameters function · 398d0eb3
      Fiona Glaser authored
      x264 would try to use the passed param struct after freeing if the param_free callback was set.
      Probably didn't cause any issues, as probably no programs used the callback in this location yet.
      
      A new x264_encoder_parameters function is now available in the API.
      This function lets the calling application grab the current state of the encoder's parameters.
      Use this in x264cli to ensure that the param struct used for set_param is updated with whatever changes x264_encoder_open has made to it.
      
      Patch partially by Anton Mitrofanov <BugMaster@narod.ru>.
      398d0eb3
    • Fiona Glaser's avatar
      Periodic intra refresh · cde39046
      Fiona Glaser authored
      Uses SEI recovery points, a moving vertical "bar" of intra blocks, and motion vector restrictions to eliminate keyframes.
      Attempt to hide the visual appearance of the intra bar when --no-psy isn't set.
      Enabled with --intra-refresh.
      The refresh interval is controlled using keyint, but won't exceed the number of macroblock columns in the frame.
      Greatly benefits low-latency streaming by making it possible to achieve constant framesize without intra-only encoding.
      Combined with slice-max size for one slice per packet, tests suggest effective resiliance against packet loss as high as 25%.
      x264 is now the best free software low-latency video encoder in the world.
      
      Accordingly, change the API to add b_keyframe to the parameters present in output pictures.
      Calling applications should check this to see if a frame is seekable, not the frame type.
      
      Also make x264's motion estimation strictly abide by horizontal MV range limits in order for PIR to work.
      Also fix a major bug in sliced-threads VBV handling.
      Also change "auto" threads for sliced threads to "cores" instead of "1.5*cores" after performance testing.
      Also simplify ratecontrol's checking of first pass options.
      Also some minor tweaks to row-based VBV that should improve VBV accuracy on small frames.
      cde39046
    • Kieran Kunhya's avatar
      LAVF/FFMS input support, native VFR timestamp handling · 30d76a5e
      Kieran Kunhya authored
      libx264 now takes three new API parameters.
      b_vfr_input tells x264 whether or not the input is VFR, and is 1 by default.
      i_timebase_num and i_timebase_den pass the timebase to x264.
      
      x264_picture_t now returns the DTS of each frame: the calling app need not calculate it anymore.
      
      Add libavformat and FFMS2 input support: requires libav* and ffms2 libraries respectively.
      FFMS2 is _STRONGLY_ preferred over libavformat: we encourage all distributions to compile with FFMS2 support if at all possible.
      FFMS2 can be found at http://code.google.com/p/ffmpegsource/.
      --index, a new x264cli option, allows the user to store (or load) an FFMS2 index file for future use, to avoid re-indexing in the future.
      
      Overhaul the muxers to pass through timestamps instead of assuming CFR.
      Also overhaul muxers to correctly use b_annexb and b_repeat_headers to simplify the code.
      Remove VFW input support, since it's now pretty much redundant with native AVS support and LAVF support.
      Finally, overhaul a large part of the x264cli internals.
      
      --force-cfr, a new x264cli option, allows the user to force the old method of timestamp handling.  May be useful in case of a source with broken timestamps.
      Avisynth, YUV, and Y4M input are all still CFR.  LAVF or FFMS2 must be used for VFR support.
      
      Do note that this patch does *not* add VFR ratecontrol yet.
      Support for telecined input is also somewhat dubious at the moment.
      
      Large parts of this patch by Mike Gurlitz <mike.gurlitz@gmail.com>, Steven Walters <kemuri9@gmail.com>, and Yusuke Nakamura <muken.the.vfrmaniac@gmail.com>.
      30d76a5e
    • Fiona Glaser's avatar
      More help typo fixes · 8c8bfe19
      Fiona Glaser authored
      8c8bfe19
  13. 15 Dec, 2009 1 commit
  14. 11 Dec, 2009 1 commit
  15. 09 Dec, 2009 2 commits
    • Fiona Glaser's avatar
      Bring back slice-based threading support · 6f221210
      Fiona Glaser authored
      Enabled with --sliced-threads
      Unlike normal threading, adds no encoding latency.
      Less efficient than normal threading, both performance and compression-wise.
      Useful for low-latency encoding environments where performance is still important, such as HD videoconferencing.
      Add --tune zerolatency, which eliminates all x264 encoder-side latency (no delayed frames at all).
      Some tweaks to VBV ratecontrol and lookahead (in addition to those required by sliced threading).
      Commit sponsored by a media streaming company that wishes to remain anonymous.
      6f221210
    • Alex Jurkiewicz's avatar
      Add more detailed help for presets/tunes/profiles · a2380187
      Alex Jurkiewicz authored
      Shows what options they represent.
      a2380187
  16. 05 Dec, 2009 1 commit
  17. 30 Nov, 2009 2 commits
    • Fiona Glaser's avatar
      10L in r1353 · ade48a91
      Fiona Glaser authored
      Broke mp4 output.
      ade48a91
    • Steven Walters's avatar
      Enhanced Avisynth input support · 025f01db
      Steven Walters authored
      Requires avisynth_c.h from the Avisynth API headers.
      Reports errors properly from Avisynth script input.
      Automatically construct input scripts for almost any input file.
      Tries ffmpegsource2, DSS2, directshowsource, and many other sourcing methods, based on the input file extension.
      Automatically converts to YV12.
      025f01db
  18. 15 Nov, 2009 1 commit
  19. 10 Nov, 2009 1 commit
  20. 09 Nov, 2009 4 commits
    • Loren Merritt's avatar
      cosmetics · df732ec7
      Loren Merritt authored
      df732ec7
    • Dylan Yudaken's avatar
      Weighted P-frame prediction · ccac8546
      Dylan Yudaken authored
      Merge Dylan's Google Summer of Code 2009 tree.
      Detect fades and use weighted prediction to improve compression and quality.
      "Blind" mode provides a small overall quality increase by using a -1 offset without doing any analysis, as described in JVT-AB033.
      "Smart", the default mode, also performs fade detection and decides weights accordingly.
      MB-tree takes into account the effects of "smart" analysis in lookahead, even further improving quality in fades.
      If psy is on, mbtree is on, interlaced is off, and weightp is off, fade detection will still be performed.
      However, it will be used to adjust quality instead of create actual weights.
      This will improve quality in fades when encoding in Baseline profile.
      
      Doesn't add support for interlaced encoding with weightp yet.
      Only adds support for luma weights, not chroma weights.
      Internal code for chroma weights is in, but there's no analysis yet.
      Baseline profile requires that weightp be off.
      All weightp modes may cause minor breakage in non-compliant decoders that take shortcuts in deblocking reference frame checks.
      "Smart" may cause serious breakage in non-compliant decoders that take shortcuts in handling of duplicate reference frames.
      
      Thanks to Google for sponsoring our most successful Summer of Code yet!
      ccac8546
    • Steven Walters's avatar
    • Anton Mitrofanov's avatar
      Fix large file support, broken in r1302 · f3c9e6f3
      Anton Mitrofanov authored
      f3c9e6f3