[Libav-user] API changes v2.8.x ==> 3.0.x

[salsaman]

On Thu, Aug 18, 2016 at 4:02 PM, Charles <linux2 at orion15.org> wrote:

>     El 17/08/16 a las 23:20, Charles escribió:
>>
>>         Anybody had any luck finding sample code that uses the 3.0 API
>>         There was some traffic back in June that just seemed to end...
>>         Thanks
>>
>>     AFAIK, the 3.0 API does not work.  That is codecpar (which works but
>>     is missing some stuff for encoding) and av_send_packet(),etc. which
>>     do not work at all.
>>     I suggest you wait until ffplay/ffmpeg get translated to that new
>>     api before you try it yourself.
>>
>> What is codecpar ? I have never heard of it.
>>
>> Gabriel.
>>
>
> Gonzalo, kinda figured that out so now just a bunch of warnings...
>
> Gabriel,
>
> @@libavformat/avformat.h+878
>     /**
>      * @deprecated use the codecpar struct instead
>      */
>     attribute_deprecated
>     AVCodecContext *codec;
>
> @@libavformat/avformat.h+1212
>     /*
>      * Codec parameters associated with this stream. Allocated and freed by
>      * libavformat in avformat_new_stream() and avformat_free_context()
>      * respectively.
>      *
>      * - demuxing: filled by libavformat on stream creation or in
>      *             avformat_find_stream_info()
>      * - muxing: filled by the caller before avformat_write_header()
>      */
>     AVCodecParameters *codecpar;
>
>
>
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OK. Is it just a straight replacement, e.g:


 AVCodecContext *cc;

vdecoder=avcodec_find_decoder(cc->codec_id);
avcodec_open2(cc, vdecoder, NULL);

cdata->frame_width=cdata->width = cc->width;
cdata->frame_height=cdata->height = cc->height;

becomes:

AVCodecParameters *cp;

vdecoder=avcodec_find_decoder(cp->codec_id);
avcodec_open2(cp, vdecoder, NULL);

cdata->frame_width=cdata->width = cp->width;
cdata->frame_height=cdata->height = cp->height;


etc ?




also:
avformat_find_stream_info() returns an array of streams...so in the new
version it returns an array of stream and corresponding array of codecpar ?


Regards,
Gabriel.
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