[FFmpeg-user] [Libav-user] avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet) why most of the time frameFinished is zero ?

[cyril poulet]

a packet rarely contains an entire frame. You have to feed the decoder
packets until a frame is finished.
frameFinished is the flag that tells you that a complete frame has been
gathered and decoded, and that you can now work on it

However, seeing the number of messages you left recently, you might want to
find a tutorial instead of posting very simple questions...


2014-05-27 12:34 GMT+02:00 cyril poulet <xenosender at gmail.com>:

> a packet rarely contains an entire frame. You have to feed the decoder
> packets until a frame is finished.
> frameFinished is the flag that tells you that a complete frame has been
> gathered and decoded, and that you can now work on it
>
>
> 2014-05-26 10:36 GMT+02:00 sithruk sana <get2jils at gmail.com>:
>
>> Dear all,
>>
>> I received a packet from rtsp by av_read_frame and decode it through
>>
>>  avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet)
>>
>> After decoding i am checking  the value of frameFinished.
>>
>> Most of the time i get the value of frameFinished is zero.  May be around
>> 50% of the packet.
>>
>>
>> Can u hint me what could be the reason ?
>>
>> It is any way related to 'I', 'P', 'B' packet types ?
>>
>>
>>
>>
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>>
>>
>