[Libav-user] QImage(RGB32) to AVFrame(RGB32)

[salsaman]

Actually av_image_alloc() should set it for you so you shouldn't need to
set it yourself.


Gabriel.


http://lives-video.com
https://www.openhub.net/accounts/salsaman

On Wed, Apr 18, 2018 at 10:49 AM, salsaman <salsaman at gmail.com> wrote:

> linesize should be w * 4 for ARGB I think.
>
> Gabriel.
>
>
> http://lives-video.com
> https://www.openhub.net/accounts/salsaman
>
> On Wed, Apr 18, 2018 at 2:04 AM, Valeriy Shtoma <shtomavaleriy at gmail.com>
> wrote:
>
>> Hi to all dear developers,
>>
>> I want to convert QImage to AVFrame and than push it to
>> filter. But when I pushed AVFrame, I got an error:
>>
>>  [in @ 0x11c71c200] Changing frame properties on the fly
>> is not supported by all filters.
>>
>> and than
>>
>>  [libx264 @ 0x10ea52c00] Input picture width (640) is greater
>>  than stride (0)
>>
>> But in this case my picture 1280x720...
>> I know, that my code wrong(not correct pointers and linesize)
>> What I’m doing wrong?
>>
>> My code:
>>
>> Varian 1:
>> AV_PIX_FMT_ARGB or AV_PIX_FMT_RGB32
>>
>> QImage img = ...;
>>  AVFrame *frame = av_frame_alloc();
>>  avpicture_fill((AVPicture*)frame, img.bits(), AV_PIX_FMT_ARGB,
>>  img.width(), img.height());
>>
>> Variant 2:
>> AVFrame *frame = av_frame_alloc();
>> av_image_alloc(frame->data, frame->linesize, w, h, AV_PIX_FMT_ARGB, 1);
>> frame->width = w;
>> frame->height = h;
>> frame->format = AV_PIX_FMT_ARGB;
>> frame->linesize[0] = w;
>> av_image_fill_arrays(frame->data, frame->linesize, (uint8_t*)img.bits(),
>>  AV_PIX_FMT_ARGB, w, h, 1);
>>
>> Thanks for attention. :)
>>
>> Kind Regards,
>> Valeriy V Shtoma
>> _______________________________________________
>> Libav-user mailing list
>> Libav-user at ffmpeg.org
>> http://ffmpeg.org/mailman/listinfo/libav-user
>>
>
>
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