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mpeg2enc: fix interlace-mode detection

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Previously, the code was always assuming progressive input,
fix this by looking at the caps.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2455>
This commit is contained in:
Mathieu Duponchelle 2021-08-05 23:11:26 +02:00
parent a561b1bd86
commit c5d725652d
1 changed files with 19 additions and 1 deletions
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18
ext/mpeg2enc/gstmpeg2encpicturereader.cc
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@ -61,6 +61,7 @@ GstMpeg2EncPictureReader::StreamPictureParams (MPEG2EncInVidParams & strm)
const GValue *par_val;
y4m_ratio_t fps;
y4m_ratio_t par;
const gchar *interlace_mode;
if (!gst_structure_get_int (structure, "width", &width))
width = -1;
@ -90,7 +91,24 @@ GstMpeg2EncPictureReader::StreamPictureParams (MPEG2EncInVidParams & strm)
strm.horizontal_size = width;
strm.vertical_size = height;
interlace_mode = gst_structure_get_string (structure, "interlace-mode");
if (!g_strcmp0(interlace_mode, "interleaved")) {
const gchar *field_order = gst_structure_get_string(structure, "field-order");
if (!g_strcmp0(field_order, "bottom-field-first")) {
strm.interlacing_code = Y4M_ILACE_BOTTOM_FIRST;
} else if (!g_strcmp0(field_order, "top-field-first")) {
strm.interlacing_code = Y4M_ILACE_TOP_FIRST;
} else {
GST_WARNING ("No field-order in caps, assuming top field first");
strm.interlacing_code = Y4M_ILACE_TOP_FIRST;
}
} else if (!g_strcmp0(interlace_mode, "mixed")) {
strm.interlacing_code = Y4M_ILACE_MIXED;
} else {
strm.interlacing_code = Y4M_ILACE_NONE;
}
strm.aspect_ratio_code = mpeg_guess_mpeg_aspect_code (2, par,
strm.horizontal_size, strm.vertical_size);