Calculate the duration as accurately as possible to improve decoding of samples
where the last frame is smaller than the rest.
Example:
Take lossless-audio/luckynight-partial.tak from the FATE suit and convert it
to TTA muxed into matroska:
ffmpeg -i $(SAMPLES)/lossless-audio/luckynight-partial.tak -c:a tta lucky.mka
The framemd5 output for lucky.mka without this patch:
0, 0, 0, 46080, 184320, 7c3751ddd571d2903c3cf0ab4b3e3d0a
0, 46080, 46080, 46080, 184320, 6b70c782ba1da3f933fde2daa4f96b73
0, 92160, 92160, 46080, 184320, dcf70d89c54b9a4f0b302d4ec4fb302d
0, 138240, 138240, 46080, 184320, 48713ca38b388d2ea4abf5b86ed1226f
0, 184320, 184320, 46080, 184320, 12188a23648e7ebfb07cd6fe9197b2ea
0, 230400, 230400, 46080, 184320, 49653ab8186a5d4a044ed284671a26e0
0, 276480, 276480, 46080, 184320, 5e82c6a7fe58c7ea612c03a0a2927dd4
0, 322560, 322560, 46080, 184320, 83dc449dbd9eab5f2e8ad2b4403d6a21
0, 368640, 368640, 46080, 184320, bdd6b92c23d30978d4e802d305b0fc49
With this patch:
0, 0, 0, 46080, 184320, 7c3751ddd571d2903c3cf0ab4b3e3d0a
0, 46080, 46080, 46080, 184320, 6b70c782ba1da3f933fde2daa4f96b73
0, 92160, 92160, 46080, 184320, dcf70d89c54b9a4f0b302d4ec4fb302d
0, 138240, 138240, 46080, 184320, 48713ca38b388d2ea4abf5b86ed1226f
0, 184320, 184320, 46080, 184320, 12188a23648e7ebfb07cd6fe9197b2ea
0, 230400, 230400, 46080, 184320, 49653ab8186a5d4a044ed284671a26e0
0, 276480, 276480, 46080, 184320, 5e82c6a7fe58c7ea612c03a0a2927dd4
0, 322560, 322560, 46080, 184320, 83dc449dbd9eab5f2e8ad2b4403d6a21
0, 368640, 368640, 46080, 184320, bdd6b92c23d30978d4e802d305b0fc49
0, 414720, 414720, 4230, 16920, b50b440c5bbcecb8e9fbece643447593
The duration without this patch was calculated as 418950000000, which is bigger
than uint32_t and as such stored as 2338172288.
With this patch the duration is correctly calculated as 418950.
Signed-off-by: James Almer <jamrial@gmail.com>
Approved-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
FFmpeg README
-------------
1) Documentation
----------------
* Read the documentation in the doc/ directory in git.
You can also view it online at http://ffmpeg.org/documentation.html
2) Licensing
------------
* See the LICENSE file.
3) Build and Install
--------------------
* See the INSTALL file.
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