diff options
| author | Jerome Martinez <jerome@mediaarea.net> | 2023-01-14 13:32:36 +0100 |
|---|---|---|
| committer | Marton Balint <cus@passwd.hu> | 2023-03-26 22:04:44 +0200 |
| commit | 174ca11d915c5258115b208285a232de94d6e14a (patch) | |
| tree | a151d9a747768520457d40c691508f50e6698eae /libavformat/mxfenc.c | |
| parent | cd954aa3c6e522053d6983a8bda8019e0feee826 (diff) | |
| download | ffmpeg-174ca11d915c5258115b208285a232de94d6e14a.tar.gz | |
avformat/mxfenc: fix stored/sampled/displayed width/height
According to MXF specs the Stored Rectangle corresponds to the data which is
passed to the compressor and received from the decompressor, so they should
contain the width / height extended to the macroblock boundary.
In practice however width and height values rounded to the upper 16 multiples
are only seen when muxing MPEG formats. Therefore this patch changes stored
width and height values to unrounded for all non-MPEG formats, even macroblock
based ones.
For DNXHD the specs (ST 2019-4) explicitly indicates to use 1080 for 1088p.
For ProRes the specs (RDD 44) only refer to to ST 377-1 without precision but
no known commercial implementations are using rounded values.
DV is not using 16x16 macroblocks, so 16 rounding makes no sense.
The patch also fixes Sampled Width / Display Width to use unrounded values.
Signed-off-by: Marton Balint <cus@passwd.hu>
Diffstat (limited to 'libavformat/mxfenc.c')
| -rw-r--r-- | libavformat/mxfenc.c | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/libavformat/mxfenc.c b/libavformat/mxfenc.c index c79d0dc4be..9eba208ffb 100644 --- a/libavformat/mxfenc.c +++ b/libavformat/mxfenc.c @@ -1149,8 +1149,9 @@ static int64_t mxf_write_cdci_common(AVFormatContext *s, AVStream *st, const UID { MXFStreamContext *sc = st->priv_data; AVIOContext *pb = s->pb; - int stored_width = 0; - int stored_height = (st->codecpar->height+15)/16*16; + int stored_width = st->codecpar->width; + int stored_height = st->codecpar->height; + int display_width; int display_height; int f1, f2; const MXFCodecUL *color_primaries_ul; @@ -1169,12 +1170,24 @@ static int64_t mxf_write_cdci_common(AVFormatContext *s, AVStream *st, const UID else if (st->codecpar->height == 720) stored_width = 1280; } - if (!stored_width) - stored_width = (st->codecpar->width+15)/16*16; + display_width = stored_width; + switch (st->codecpar->codec_id) { + case AV_CODEC_ID_MPEG2VIDEO: + case AV_CODEC_ID_H264: + //Based on 16x16 macroblocks + stored_width = (stored_width+15)/16*16; + stored_height = (stored_height+15)/16*16; + break; + default: + break; + } + + //Stored width mxf_write_local_tag(s, 4, 0x3203); avio_wb32(pb, stored_width); + //Stored height mxf_write_local_tag(s, 4, 0x3202); avio_wb32(pb, stored_height>>sc->interlaced); @@ -1194,7 +1207,7 @@ static int64_t mxf_write_cdci_common(AVFormatContext *s, AVStream *st, const UID //Sampled width mxf_write_local_tag(s, 4, 0x3205); - avio_wb32(pb, stored_width); + avio_wb32(pb, display_width); //Samples height mxf_write_local_tag(s, 4, 0x3204); @@ -1208,8 +1221,9 @@ static int64_t mxf_write_cdci_common(AVFormatContext *s, AVStream *st, const UID mxf_write_local_tag(s, 4, 0x3207); avio_wb32(pb, 0); + //Display width mxf_write_local_tag(s, 4, 0x3209); - avio_wb32(pb, stored_width); + avio_wb32(pb, display_width); if (st->codecpar->height == 608) // PAL + VBI display_height = 576; @@ -1218,6 +1232,7 @@ static int64_t mxf_write_cdci_common(AVFormatContext *s, AVStream *st, const UID else display_height = st->codecpar->height; + //Display height mxf_write_local_tag(s, 4, 0x3208); avio_wb32(pb, display_height>>sc->interlaced); |