[FFmpeg-devel] [PATCH] libavformat/concatdev.c: Add unified_time_base opt

Ye Chuan yechuan0102 at hotmail.com
Tue Mar 1 14:33:21 EET 2022

There is some bug on my mail application , when it open the .eml file , the space may be erase by the application, so the patch will not pass the test online

From: ffmpeg-devel <ffmpeg-devel-bounces at ffmpeg.org> on behalf of Nicolas George <george at nsup.org>
Date: Tuesday, March 1, 2022 at 8:18 PM
To: FFmpeg development discussions and patches <ffmpeg-devel at ffmpeg.org>
Subject: Re: [FFmpeg-devel] [PATCH] libavformat/concatdev.c: Add unified_time_base opt
Ye Chuan (12022-03-01):
> In some case, the input files have different time base even though
> they share the same codec and codec parameters,
> While processing the packet, it will adjust the pts/dts by its own
> time base instead of the unified one of the output stream, which may
> lead to wrong pts/dts or unexpected speed change.
> So this patch add the "unified_time_base" opt, which could be setted by
> "-unified_time_base 1"
> With the option, it will concatenate the input streams whose time base
> are different , and won't course speed change issue.
> Signed-off-by: Chuan Ye <yechuan0102 at hotmail.com>
> ---
> libavformat/concatdec.c | 31 ++++++++++++++++++++++++-------
> 1 file changed, 24 insertions(+), 7 deletions(-)

Thanks for the patch. I need to examine exactly what it does.

In the meantime, I do not know why you keep posting new versions of this
patch every few minutes. Please take your time. And before next time:

>     int segment_time_metadata;
> +    int unified_time_base;

Mangled indentation.

Missing documentation.

Spelling mistake in the title of the commit message.


  Nicolas George

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