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x264enc: add some documentation on profile

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This commit is contained in:
Mark Nauwelaerts 2009-04-29 16:57:36 +02:00
parent 87e9e529e7
commit 9a0c38e01e
1 changed files with 9 additions and 0 deletions
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9
ext/x264/gstx264enc.c
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@ -33,6 +33,14 @@
* Alternatively, one may choose to perform Constant Quantizer or Quality encoding, * Alternatively, one may choose to perform Constant Quantizer or Quality encoding,
* in which case the #GstX264Enc:quantizer property controls much of the outcome. * in which case the #GstX264Enc:quantizer property controls much of the outcome.
* *
* The H264 profile that is eventually used depends on a few settings.
* If #GstX264Enc:dct8x8 is enabled, then High profile is used.
* Otherwise, if #GstX264Enc:cabac entropy coding is enabled or #GstX264Enc:bframes
* are allowed, then Main Profile is in effect, and otherwise Baseline profile
* applies. As such, Main is presently the default profile, which is fine for
* most players and settings, but in some cases (e.g. hardware platforms)
* a more restricted profile/level may be necessary.
*
* <refsect2> * <refsect2>
* <title>Example pipeline</title> * <title>Example pipeline</title>
* |[ * |[
@ -522,6 +530,7 @@ gst_x264_enc_init_encoder (GstX264Enc * encoder)
encoder->x264param.i_keyint_max = encoder->keyint_max ? encoder->keyint_max : encoder->x264param.i_keyint_max = encoder->keyint_max ? encoder->keyint_max :
(2 * encoder->fps_num / encoder->fps_den); (2 * encoder->fps_num / encoder->fps_den);
encoder->x264param.b_cabac = encoder->cabac; encoder->x264param.b_cabac = encoder->cabac;
// TODO
encoder->x264param.b_aud = 1; encoder->x264param.b_aud = 1;
encoder->x264param.i_sps_id = encoder->sps_id; encoder->x264param.i_sps_id = encoder->sps_id;
if ((((encoder->height == 576) && ((encoder->width == 720) if ((((encoder->height == 576) && ((encoder->width == 720)