Hello
I am experimenting with the FFMpeg library and now succesful able to encode
MPEG1 (after looking at examples from Fabrice Bellard and others) and XVID
after messing around a bit.
Encoding WMV (1 or 2) is a problem. I have no clue why I can't open the
codec and I can't find a clear example that tells me how to set-up the
context.
avcodec_init();
av_register_all();
AVCodec * pCodec_ =
avcodec_find_encoder(CODEC_ID_WMV1);
if ( ! pCodec_)
{//Codec is found in my case!
return;
}
AVCodecContext * pContext_ = avcodec_alloc_context();
avcodec_get_context_defaults(pContext_);
pContext_->bit_rate = 400000;
pContext_->width = 512;
pContext_->height = 512;
pContext_->time_base.den = 25;//(AVRational){1,25}; // svw change this
for win MSVC
pContext_->time_base.num = 1;//(AVRational){1,25}; // svw change this
for win MSVC
pContext_->gop_size = 10;
pContext_->max_b_frames = 1;
pContext_->pix_fmt = PIX_FMT_YUV420P;
/* open it */
int res = avcodec_open(pContext_, pCodec_);
//The return value is -1!
if (res < 0)
{
av_free(pContext_);
pContext_ = 0;
return;
}
Obiously I need to set up some context parameters correctly. Does anyone
know where I can find how to do this or does anyone have a nice example?
Best regards,
Arthur
_______________________________________________
libav-user mailing list
[email protected]
https://lists.mplayerhq.hu/mailman/listinfo/libav-user
