[FFmpeg-user] (mpeg2) how to set "audio delay relative to video" as 0 ?

[linxs]

One more question, why ffmpeg add "-10ms" for video delay relative to video?
Thank you!


2014-09-19 21:39 GMT+08:00 linxs <linxsy at gmail.com>:

> Thank you !
> "asetpts=PTS+0.010/TB" works!
>
>
> 2014-09-18 18:40 GMT+08:00 Stefano Sabatini <stefasab at gmail.com>:
>
>> On date Thursday 2014-09-18 08:58:33 +0800, linxs wrote:
>> > D:\>ffprobe 0.mpg
>> > ffprobe version N-63439-g96470ca Copyright (c) 2007-2014 the FFmpeg
>> > developers
>> >   built on May 25 2014 22:01:51 with gcc 4.8.2 (GCC)
>> >   configuration: --enable-gpl --enable-version3 --disable-w32threads
>> > --enable-av
>> > isynth --enable-bzlib --enable-fontconfig --enable-frei0r
>> --enable-gnutls
>> > --enab
>> > le-iconv --enable-libass --enable-libbluray --enable-libcaca
>> > --enable-libfreetyp
>> > e --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug
>> > --enable-
>> > libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb
>> > --enable-libope
>> > njpeg --enable-libopus --enable-librtmp --enable-libschroedinger
>> > --enable-libsox
>> > r --enable-libspeex --enable-libtheora --enable-libtwolame
>> > --enable-libvidstab -
>> > -enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis
>> > --enable-libvpx
>> > --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265
>> > --enable-
>> > libxavs --enable-libxvid --enable-decklink --enable-zlib
>> >   libavutil      52. 86.100 / 52. 86.100
>> >   libavcodec     55. 65.100 / 55. 65.100
>> >   libavformat    55. 41.100 / 55. 41.100
>> >   libavdevice    55. 13.101 / 55. 13.101
>> >   libavfilter     4.  5.100 /  4.  5.100
>> >   libswscale      2.  6.100 /  2.  6.100
>> >   libswresample   0. 19.100 /  0. 19.100
>> >   libpostproc    52.  3.100 / 52.  3.100
>> > Input #0, mpeg, from '0.mpg':
>> >   Duration: 00:00:14.98, start: 0.529978, bitrate: 953 kb/s
>> >     Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p(tv), 720x576
>> [SAR
>> > 16:1
>> > 5 DAR 4:3], max. 104857 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
>> >     Stream #0:1[0x1c0]: Audio: mp2, 48000 Hz, stereo, s16p, 384 kb/s
>>
>> ffprobe -show_streams?
>>
>> Also you can check the PTS values of the first timestamps, something
>> like:
>> ffprobe -show_packets -of compact -select_streams v INPUT -read_intervals
>> "%+#1"
>> ffprobe -show_packets -of compact -select_streams a INPUT -read_intervals
>> "%+#1"
>>
>> > I added -af "asetpts=PTS+0/TB" to the options of ffmpeg.
>> > The audio delay relative to video of output mpg  is -10ms too. nothing
>> > changed.
>>
>> What about:
>> asetpts=PTS+0.010/TB
>>
>> Please don't top post.
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>>
>
>