[libav-api] Transcoding

Ronald S. Bultje rsbultje at gmail.com
Thu Feb 2 16:20:17 CET 2012


On Thu, Feb 2, 2012 at 2:20 AM, Malay Nema <mnema at yahoo.com> wrote:
> Hello Ronald,
> Thanks for your mail.
> '-vcodec' is an option at the command line level. I am using the libraries
> to manipulate the videos in the memory and then want to save in the form of
> video. After manipulation I do not have any Motion Vector knowledge. It is
> as good as motion JPEG.
> Here is a step by step operation I would like to do
> 1. Read a video (not raw, only till DCT coefficients of Y Cb and Cr bands)
> in to memory.
> 2. Manipulate the DCTs of Y Cb and Cr bands. At this point, we have modified
> DCTs of all the frames without motion vector.
> 3. Feed the DCTs of the Y Cb and Cr into an api to get final video output.
> Here one can specify the bit-rate and quality of the resultant video.
> I am looking forward for api(s) to achieve step 3 above.

We don't provide such an API, unfortunately.


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