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Remove support for building the player without libavcodec and
libavformat. These libraries are now always required.
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At least libavformat mpegts demuxer may give bad parameters with NULL
AVClass to the av_log callback. Check for this and print a warning
instead of crashing.
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Do the global initialization of libavcodec and libavformat
(avcodec_register_all(), av_register_all()) immediately on program
startup and remove the initialization calls from various individual
modules that use libavcodec/libavformat functionality.
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Map libav* messages with verbosity value higher than AV_LOG_VERBOSE
(likely to be AV_LOG_DEBUG) to MSGL_DBG2 instead of MSGL_V. Before
MSGL_V was used for everything above AV_LOG_INFO.
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Update various code to use newer alternatives instead of deprecated
functions/fields that are being dropped at libav API bump. An
exception is avcodec_thread_init() which is being dropped even though
it's still _necessary_ with fairly recent libav versions, so there's
no good alternative which would work with both those recent versions
and latest libavcodec. I think there are grounds to consider the drop
premature and revert it for now; if that doesn't happen I'll add a
version-test #if check around it later.
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Enable all of libavcodec, libavformat, libswscale, and libpostproc
together (libavutil is always required).
based on svn commit by diego:
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32226 b3059339-0415-0410-9bf9-f77b7e298cf2
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Move av_log callback handling from vd_ffmpeg.c to a new file
av_log.c and install the callback immediately when starting the
program. Main functionality improvements of the new code:
- The old version only installed the callback when opening an FFmpeg
video decoder. If nothing had triggered that then av_log() messages
from other sources (libavformat, audio decoding, swscale usage)
bypassed MPlayer's output system completely. Now the callback is
always installed.
- Current av_log message severity levels are handled correctly. The
old code used MSGL_ERR for some messages that should be MSGL_V.
- Message type is now set for libavformat contexts
(MSGT_DEMUXER / MSGT_MUXER).
- The old code did "mp_msg_test(type, mp_level)" before actually
determining the type, so that it always used MSGT_FIXME. This led
to some messages being incorrectly dropped in case the user
had specified module-specific verbosity levels. The old check in
question was originally motivated by performance problems when
there were a lot of callbacks; however it's not clear whether the
part about it skipping the type determination was intentional (most
of the performance problems must have come from the way the
original code used snprintf) and in my tests current FFmpeg
libraries have not generated unreasonable amounts of callbacks
anyway.
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