[FFmpeg-trac] #9782(avformat:new): avformat_find_stream_info too slow with open TS stream
FFmpeg
trac at avcodec.org
Wed Jun 15 08:46:57 EEST 2022
#9782: avformat_find_stream_info too slow with open TS stream
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Reporter: GJJ | Owner: (none)
Type: defect | Status: new
Priority: important | Component: avformat
Version: git-master | Resolution:
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Changes (by Marton Balint):
* cc: Marton Balint (added)
Comment:
It seems that part of code is some hack for broken files from the old
times.
I have sent a patch which eliminates it more completetly.
https://patchwork.ffmpeg.org/project/ffmpeg/patch/20220615053442.8300-1-cus@passwd.hu/
Also note that for ffmpeg tests I needed to specify -scan_all_pmts 0 to be
able to test this, otherwise it does not really make a difference, because
ffmpeg implicitly sets it to 1 which ultimately causes the code in
avformat_find_stream_info() to effectively read the whole probesize during
probing.
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Ticket URL: <https://trac.ffmpeg.org/ticket/9782#comment:7>
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