[Libav-user] Timestamps for AVPaket

[Eric Hsieh(Psychesnet)]

Dear zhivago,

you can try to set pkt1.pts = 0, and the ffmpeg will calculate for this
packet.


Regards, Eric Hsieh, 09/17

2011/9/17 zhivago <zhivagoserg at yandex.ua>

> Help me please properly set the timestamps. I have created an output
> filter,
> which takes video (MEDIASUBTAYPE_H264) and audio (MEDIASUBTAYPE_AAC). I
> have
> to put it all into a container FLV. To mix the streams, I use libav. How to
> calculate for AVPacket presentation timestamp (pts).
>
>    static const REFERENCE_TIME UNITS_PER_SECOND = 10000000i64;
>         ....
>    REFERENCE_TIME startTime = m_lastSampleTime.startTime;
>
>    AVPacket pkt;
>    av_init_packet( &pkt );
>    pkt.data = pbData;
>    pkt.size = lDataLength;
>    pkt.flags |= AV_PKT_FLAG_KEY;
>
>    if ( video )
>    {
>        ASSERT( m_codecContextVideo );
>
>        num = m_codecContextVideo->time_base.num;
>        den = m_codecContextVideo->time_base.den;
>
>        pkt1.pts          ??? // = ::MulDiv( startTime * den, 1, num *
> UNITS_PER_SECOND );
>        pkt1.stream_index = m_streamVideoOutput->index;
>    }
>    else
>    {
>       ASSERT( m_codecContextAudio );
>
>       num = m_codecContextAudio->time_base.num;
>       den = m_codecContextAudio->time_base.den;
>
>       pkt1.pts          ??? // = ::MulDiv( startTime * den, 1, num *
> UNITS_PER_SECOND );
>       pkt1.stream_index = m_streamAudioOutput->index;
>    }
>
>    ASSERT( m_formatContextOutput );
>
>    if ( AllConnected() )
>    {
>
>        av_interleaved_write_frame( m_formatContextOutput, &pkt1 );
>    }
>    else
>    {
>        av_write_frame( m_formatContextOutput, &pkt1 );
>    }
>
> --
> View this message in context:
> http://libav-users.943685.n4.nabble.com/Timestamps-for-AVPaket-tp3818534p3818534.html
> Sent from the libav-users mailing list archive at Nabble.com.
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