[Libav-user] FFmpeg version 3.1's avcodec_decode_video2 is slower than 3.0.5.

Hwangho Kim loveall0926 at gmail.com
Mon Jan 9 10:54:16 EET 2017

> 2017. 1. 9. 오후 1:07, Carl Eugen Hoyos <ceffmpeg at gmail.com> 작성:
> 2017-01-09 1:33 GMT+01:00 Hwangho Kim <loveall0926 at gmail.com>:
>> I’ve been tried to find a way for producing this problem in macOS.
>> But I’m not good to macOS programming so I couldn’t make a
>> test program for this.
> If you can neither explain how to reproduce nor provide ffmpeg -i
> output for a file you tested, please run git bisect to find the change
> introducing the issue.
> Carl Eugen
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> Libav-user mailing list
> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user

I re-fix my email. Sorry for that.

I did git bisect based on

Bad : 3.1
Good : 3.0.5

and I was reached with checking bad or good for the video.

Bisecting: 2 revisions left to test after this

which was almost there.

But I couldn’t reach the final point because some functions and variables were changed or disappeared from this suggested commit
for example  av_get_default_channel_layout and  av_frame_get_pkt_duration.

commit 0705f5960c9d272cef1309c090000865b991c9c7
Author: Anton Khirnov <anton at khirnov.net <mailto:anton at khirnov.net>>
Date:   Tue Feb 9 12:36:13 2016 +0100

    avplay: do not use AVStream.codec for decoding
    AVStream.codec is now deprecated. Allocate a separate codec context

But as you can see there were only 2 revisions remained and I guess this might be the one or very close commit for that making this happen.

Would it be helpful?

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