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gxf: Fix 25 fps DV material in GXF being misdetected as 50 fps

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Set DV packet durations using fields_per_frame.
This requires turning gxf_stream_info into the demuxer's context for access to the value in gxf_packet().
Since MPEG-2 seems to work fine this done only for DV.

Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Tomas Härdin 2011-06-23 15:59:33 +02:00 committed by Anton Khirnov
parent d8dbe20241
commit 99fecc64b0
1 changed files with 16 additions and 9 deletions
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25
libavformat/gxf.c
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@ -264,7 +264,7 @@ static int gxf_header(AVFormatContext *s, AVFormatParameters *ap) {
int map_len;
int len;
AVRational main_timebase = {0, 0};
struct gxf_stream_info si;
struct gxf_stream_info *si = s->priv_data;
int i;
if (!parse_packet_header(pb, &pkt_type, &map_len) || pkt_type != PKT_MAP) {
av_log(s, AV_LOG_ERROR, "map packet not found\n");
@ -282,7 +282,7 @@ static int gxf_header(AVFormatContext *s, AVFormatParameters *ap) {
return 0;
}
map_len -= len;
gxf_material_tags(pb, &len, &si);
gxf_material_tags(pb, &len, si);
avio_skip(pb, len);
map_len -= 2;
len = avio_rb16(pb); // length of track description
@ -300,7 +300,7 @@ static int gxf_header(AVFormatContext *s, AVFormatParameters *ap) {
track_id = avio_r8(pb);
track_len = avio_rb16(pb);
len -= track_len;
gxf_track_tags(pb, &track_len, &si);
gxf_track_tags(pb, &track_len, si);
avio_skip(pb, track_len);
if (!(track_type & 0x80)) {
av_log(s, AV_LOG_ERROR, "invalid track type %x\n", track_type);
@ -316,12 +316,12 @@ static int gxf_header(AVFormatContext *s, AVFormatParameters *ap) {
if (idx < 0) continue;
st = s->streams[idx];
if (!main_timebase.num || !main_timebase.den) {
main_timebase.num = si.frames_per_second.den;
main_timebase.den = si.frames_per_second.num * 2;
main_timebase.num = si->frames_per_second.den;
main_timebase.den = si->frames_per_second.num * 2;
}
st->start_time = si.first_field;
if (si.first_field != AV_NOPTS_VALUE && si.last_field != AV_NOPTS_VALUE)
st->duration = si.last_field - si.first_field;
st->start_time = si->first_field;
if (si->first_field != AV_NOPTS_VALUE && si->last_field != AV_NOPTS_VALUE)
st->duration = si->last_field - si->first_field;
}
if (len < 0)
av_log(s, AV_LOG_ERROR, "invalid track description length specified\n");
@ -422,6 +422,8 @@ static int gxf_packet(AVFormatContext *s, AVPacket *pkt) {
AVIOContext *pb = s->pb;
GXFPktType pkt_type;
int pkt_len;
struct gxf_stream_info *si = s->priv_data;
while (!pb->eof_reached) {
AVStream *st;
int track_type, track_id, ret;
@ -473,6 +475,11 @@ static int gxf_packet(AVFormatContext *s, AVPacket *pkt) {
avio_skip(pb, skip);
pkt->stream_index = stream_index;
pkt->dts = field_nr;
//set duration manually for DV or else lavf misdetects the frame rate
if (st->codec->codec_id == CODEC_ID_DVVIDEO)
pkt->duration = si->fields_per_frame;
return ret;
}
return AVERROR(EIO);
@ -518,7 +525,7 @@ static int64_t gxf_read_timestamp(AVFormatContext *s, int stream_index,
AVInputFormat ff_gxf_demuxer = {
"gxf",
NULL_IF_CONFIG_SMALL("GXF format"),
0,
sizeof(struct gxf_stream_info),
gxf_probe,
gxf_header,
gxf_packet,