Gyan Doshi:
>
>
> On 2022-06-16 02:39 pm, Gyan Doshi wrote:
>> Stores wallclock time for the first packet received with a pts.
>
> Comments?
>> ---
>> doc/APIchanges | 3 +++
>> libavformat/avformat.h | 10 ++++++++++
>> libavformat/demux.c | 3 +++
>> libavformat/options.c | 1 +
>> libavformat/version.h | 2 +-
>> 5 files changed, 18 insertions(+), 1 deletion(-)
>>
>> diff --git a/doc/APIchanges b/doc/APIchanges
>> index 5857e67ae6..3d472b8963 100644
>> --- a/doc/APIchanges
>> +++ b/doc/APIchanges
>> @@ -14,6 +14,9 @@ libavutil: 2021-04-27
>> API changes, most recent first:
>> +2022-06-xx - xxxxxxxxxx - lavf 59.26.100 - avformat.h
>> + Add and set AVFormatContext.first_pts_wallclock field.
>> +
>> 2022-06-12 - xxxxxxxxxx - lavf 59.25.100 - avio.h
>> Add avio_vprintf(), similar to avio_printf() but allow to use it
>> from within a function taking a variable argument list as input.
>> diff --git a/libavformat/avformat.h b/libavformat/avformat.h
>> index f12fa7d904..56f9656a68 100644
>> --- a/libavformat/avformat.h
>> +++ b/libavformat/avformat.h
>> @@ -1808,6 +1808,16 @@ typedef struct AVFormatContext {
>> */
>> int max_probe_packets;
>> + /**
>> + * Wallclock start time of the stream in real world time, in
>> microseconds
>> + * since the Unix epoch (00:00 1st January 1970). That is, the
>> first packet
>> + * with a set pts was received at this real world time.
>> + * - demuxing: Set by libavformat. Users may want to use
>> start_time_realtime
>> + * if set.
>> + * - muxing: unused.
>> + */
>> + int64_t first_pts_wallclock;
>> +
>> /**
>> * A callback for closing the streams opened with
>> AVFormatContext.io_open().
>> *
>> diff --git a/libavformat/demux.c b/libavformat/demux.c
>> index 1620716716..9335a6efcd 100644
>> --- a/libavformat/demux.c
>> +++ b/libavformat/demux.c
>> @@ -628,6 +628,9 @@ FF_ENABLE_DEPRECATION_WARNINGS
>> force_codec_ids(s, st);
>> + if (s->first_pts_wallclock == AV_NOPTS_VALUE && pkt->pts !=
>> AV_NOPTS_VALUE)
>> + s->first_pts_wallclock = av_gettime();
>> +
>> /* TODO: audio: time filter; video: frame reordering (pts !=
>> dts) */
>> if (s->use_wallclock_as_timestamps)
>> pkt->dts = pkt->pts = av_rescale_q(av_gettime(),
>> AV_TIME_BASE_Q, st->time_base);
>> diff --git a/libavformat/options.c b/libavformat/options.c
>> index 0079a06d9a..4cc168939f 100644
>> --- a/libavformat/options.c
>> +++ b/libavformat/options.c
>> @@ -184,6 +184,7 @@ AVFormatContext *avformat_alloc_context(void)
>> return NULL;
>> }
>> + s->first_pts_wallclock = AV_NOPTS_VALUE;
>> si->shortest_end = AV_NOPTS_VALUE;
>> return s;
>> diff --git a/libavformat/version.h b/libavformat/version.h
>> index 966ebb7ed3..0708d619c0 100644
>> --- a/libavformat/version.h
>> +++ b/libavformat/version.h
>> @@ -31,7 +31,7 @@
>> #include "version_major.h"
>> -#define LIBAVFORMAT_VERSION_MINOR 25
>> +#define LIBAVFORMAT_VERSION_MINOR 26
>> #define LIBAVFORMAT_VERSION_MICRO 100
>> #define LIBAVFORMAT_VERSION_INT
>> AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
>
Is there anyone who asked for this feature?
- Andreas
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