[vlc-devel] [PATCH 2/3] demux: avformat: fix negative PTS/DTS
remi at remlab.net
Thu Aug 31 12:44:20 CEST 2017
Le 31 août 2017 12:24:03 GMT+02:00, Zhao Zhili <quinkblack at foxmail.com> a écrit :
>On 2017年08月31日 17:58, Francois Cartegnie wrote:
>> Le 31/08/2017 à 08:48, Zhao Zhili a écrit :
>>> modules/demux/avformat/demux.c | 41
>>> 1 file changed, 29 insertions(+), 12 deletions(-)
>> If the timestamps are negative from the start, I don't see
>> why the issue should be on the API user side.
>> But, this seems the same as last February discussion around
>> "mux/avformat: normalize pts and dts in AVPacket"
>> which had regressions.
>I'm trying to fix a case like this:
>original_start_time = 1000 * 1000 us;
>original_pts = 1000 * 1000 us;
>original_dts = 960 * 1000 us;
>new_pts = original_pts - original_start_time + VLC_TS_0 = 1 us;
>new_dts = original_dts - original_start_time + VLC_TS_0 = -39999 us;
>So it's the difference between PTS and DTS lead to the issue.
>vlc-devel mailing list
>To unsubscribe or modify your subscription options:
Negative timestamps can occur in some legal corner cases. There are no systematic ways to avoid them. You really shouldn't even try.
Just make sure than 0 is not a special value. There is VLC_TS_INVALID for that.
Envoyé de mon appareil Android avec Courriel K-9 Mail. Veuillez excuser ma brièveté.
More information about the vlc-devel