[Libav-user] save YUV420p file

[Misha Penkov]

On 19 June 2012 15:24, Alex Cohn <alexcohn at netvision.net.il> wrote:
> On Fri, Jun 15, 2012 at 10:18 AM, Vijay Ajay <namballa.vijaykumar at gmail.com>
> wrote:
>>
>> Hai all,
>>
>> i am decoding jpeg using
>>
>> avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet);
>>
>> I want  to save pFrame to a file i,e in yuv420  format.
>> Can some one please help me.

Also have a look at http://dranger.com/ffmpeg/tutorial01.html (there's
a more recent version of the source here:
https://github.com/mpenkov/sandpit/blob/master/ffmpeg/tutorial01.c)

> You can use rawvideo format with yuv pixel format. If you want to access an
> `AVFrame` structure directly, you should look at `data[0]` (for Y),
> `data[1]` (for U), and `data[2]` (for V). For Y plane you should read
> `height` lines, `linesize[0]` bytes per line. For U and V planes, there will
> be `height/2` lines, and linesize[1] and linesize[2] will define bytes per
> line for each plane. `linesize` is expected to be the same for U and for V.
>
>> Thanks in advance.
>> vijay
>
>
> Good luck,
> Alex
>
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