[Libav-user] Encoding YUV420SP (PIX_FMT_NV12) with MPEG4

[Hendrik Leppkes]

On Thu, Jul 23, 2015 at 10:56 AM, Oscar Hou <oscarhou at gmail.com> wrote:
>
>
> On 23 July 2015 at 00:40, Paul B Mahol <onemda at gmail.com> wrote:
>>
>>
>> Dana 23. 7. 2015. 08:29 osoba "Oscar Hou" <oscarhou at gmail.com> napisala
>> je:
>> >
>> > Hello,
>> >
>> > I was wondering if there was a way to encode directly from YUV420SP
>> > (PIX_FMT_NV12) to MPEG4 without first converting the format to YUV420P?
>> > Currently the conversion takes a too long to convert 1080p (~150ms per
>> > frame) for me to stream at 30fps. I am attempting to stream the output to
>> > VLC at 30fps but the frames are being dropped.
>> >
>>
>> Do you have yasm disabled in your build?
>>

Thats your reason then, the conversion is only optimized for x86.
And no, there is no way to avoid the conversion, most encoders only
accept YUV420P, and not NV12.

- Hendrik