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base repository: FFmpeg/FFmpeg
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head repository: FFmpeg/FFmpeg
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compare: 59003fe7c064
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- 4 commits
- 2 files changed
- 3 contributors
Commits on Sep 30, 2012
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qt-faststart is terribly slow when the input file and the output file are on a slow disk like a SD card. By increasing the copy_buffer from 1K to 32M I decreased the processing time on a sample file from 1600 seconds to 4 seconds. The timing difference is during 'copying rest of file'. S:\SD_VIDEO\PRG001>e:\utils\qt-faststart 00005.mp4 5.mp4 ftyp 0 32 free 32 8 mdat 40 13744391 moov 13744431 141848 patching stco atom... patching stco atom... writing ftyp atom... writing moov atom... copying rest of file... Execution time: 1576.259 s S:\SD_VIDEO\PRG001>s:\utils\qt-faststart 00005.mp4 5.mp4 ftyp 0 32 free 32 8 mdat 40 13744391 moov 13744431 141848 patching stco atom... patching stco atom... writing ftyp atom... writing moov atom... copying rest of file... Execution time: 3.846 s Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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qt-faststart: dont allocate a bigger buffer than needed
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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qt-faststart: simplify code by using FFMIN
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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