Activity for Andrew Stevens
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Andrew Stevens posted a comment on ticket #141
When you want to speed up Enconding mpeg2enc (which it was never built for) A small speedup should be able to gained when you change the options of mpeg2enc to this: -M 8--video-bitrate 20000 --video-buffer 1000 -f 0 -4 4 -2 4 -r 8 -D 8 -o ... The encoding time did go down a little on my machine from 37-39 sec down to 35.5-37 seconds. Measured with time, using several tries. The problem ist that the original developer of mpeg2enc has been offline for a lot of years. If you find things to speed up...
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Minor fixes to the build system. Some small speed improvements
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Ooops. Didn't set ctl_parallel_read in all cases.
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Minor tuning. Set up the parallel reading stuff properly.
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VBR handling fixed.
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Tsk tsk, attempts to link dyn libraries in dyn libraries. Who didn't
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Added initial standard VCD still stream support.
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Completed encapsulation of input streams. Now replace hard-wired
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Mplex now completely refactored. Support for muxing arbirary
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Some changes for stills streams.
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First (possibly ;-)) working version of stills (VCD normal res only).
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Fixed buffer size calculation to allow for overhead of headers etc
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Added basic support for HR VCD stills.
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Added support SVCD Stills
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Moved motion estimation search routines into library to allow re-use elsewhere.
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Added SVCD Stills support. Fixed setting of PTS/DTS in last sector of
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Added support SVCD stills.
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Removed a redundant debugging fprintf.
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Move of motion estimation core routines into utils lib.
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Fixed missing buffer header in (S)VCD.
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Updated for tidied motion estimation search / block difference routine
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Mato Marjanovic's top/bottom instead of odd/even patch.
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Hard-wired stills interval to 30 frame periods.
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Brought some sanity into the naming conventions for
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Replaced references to stdint.h/inttypes.h with properly autoconf'ed
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Fixed bugs in -S and -l handling introduced by new mux despatch loop.
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Ooops how did I not get _intern?
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Added new YUV header library, shifted original lavtools one to "oldyuv4mpeg.*"
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Herbert Riedels's fixes for errors in SVCD still sanity checking.
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Remove build of libmjpeg.a as prelude to removal of sub-dir as it is
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Started a more sensible partitioning of classes into source files.
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Added proper support for VCD mixed stills streams and tidied up some niggles
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Fixed a stupid error in the handling of MPEG-2 padding packets.
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Herbert Riedel's patches to permit clean compilation under Cygwin32.
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Damn, Herbert's __asm__ hack seems to break under Linux... removed those
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Fixed bug in motion estimation module
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Removed doubled surge tolerance bug.
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*** empty log message ***
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Fixed silly bit-pool over-growth for VBR...
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Herbert's corrected asm fix version sans typo!
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Lets try another approach...
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Included Philip Zabel's new header patch (thanks Philip!)
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Fixed bug in yuv4mpeg lib that prevents EOF from being distinguished from
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Fixed file-size limiting bug in liblavrec.
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Fixed bug in mpeg2enc zero M/C chroma variance calculation.
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Minor portability fixes.
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Fixed I/P DTS = PTS next B frame Bug.
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Fixed a niggling buffering bug and made mplex use the common mpegconsts
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Renamed to libutil.a to libmjpegutil.a to avoid a reported name-clash.
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Fixed inconsistent handling of field / progressive default in SVCD
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Added support for YUV4MPEG with unspecified (0.0) frame-rates.
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Corrected "non-atomic" producer->consumer handshake causing a deadlock
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Fixed (hopefully) the buffer management bugs in mplex's audio handling
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Fixed aspect ratio display and tidied buffering stats display.
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Fixed stupid error I left in after working on audio buffering problem.
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Re-enabled mixed stills stream muxing for VCD with some additional sanity
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Fixed getopt portability issue for *BSD.
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The return of the -s flag... by popular request!
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Modification to support automatic period syncing from lavrec.
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Mpeg2enc portability fix for getopt.h
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Removed stale debug error message.
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Added mechanism for default interlace selection with an override for
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Doh!
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Added -config script for for convenient auto*-ing
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Fixed some serious errors in the 3:2 pulldown code in mpeg2enc and mplex.
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Fixed bug whereby individual frames may be allocated more bits than the
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Tidied header generation code to support DVD options.
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Fixed broken stream-end logic caused by corrected bit-stream scanning
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Now adapted for latest mpeg2dec
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Steven Schulz' tidied up version!
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Fixed very silly bug where I'd managed to turn off generation of
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Removed excess debugging mjpeg_info.
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Added accidentally ommitted support for audio in SVCD stills streams.
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Correct second VCD over-tidying. We *must* have always_buffers for audio to
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Tidying up and added moer DVD support.
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Modified mpeg2enc to use an xtag in yuv4mpeg header to communicate
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Minor bug-fixes to I-frame header (Motion vectors) and closed-gop flag
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Tidying up partitioning of class into files.
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Added MMX and extended MMX deinterlacing code.
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Fixed some errors due to spurious EOF's being causedd by the use of
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Added extended MMX version of deinterlacer to yuvdenoise.
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Minor fixes to lav2yuv and lav_io.h to correct minor bug in flag
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Added facility to correct captures grabbed with frames captured `starting with
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Checked in Hitoshi's fixes to the flag setting logic for 3:2 pulldown
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Got rid of some junk that somehow slipped into CVS.
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Fixed error in rubric.
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Brought into sync with the current state of the software.
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Fixed lost error code in main loop (added Emacs local variable to
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Fixed MP3 multiplexing bug.
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Added support for AC3 multiplexing and DVD multiplexing.
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DVD now appears to (more or less) work.
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More DVD support goodies for mplex.
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Added X86 SIMD support for encoding.
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Ooops forgot some temporary headers needed.
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Fixed minor bug in -f 3 handling (param_fieldenc not being set).
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Added pure-MMX support for fast quantisation
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Minor doco updates.
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Modified file probing to allow true single-pass multiplexing.
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Tidied handling of progressive frames.
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