lavf: deprecate AVFormatContext.timestamp

It's replaced by 'creation_time' metadata tag.

ffmpeg.c

@@ -183,7 +183,6 @@ static float mux_max_delay= 0.7;
 
 static int64_t recording_time = INT64_MAX;
 static int64_t start_time = 0;
-static int64_t recording_timestamp = 0;
 static int64_t input_ts_offset = 0;
 static int file_overwrite = 0;
 static AVDictionary *metadata;
@@ -712,9 +711,6 @@ static int read_ffserver_streams(AVFormatContext *s, const char *filename)
             nopts = 1;
     }
 
-    if (!nopts)
-        s->timestamp = av_gettime();
-
     av_close_input_file(ic);
     return 0;
 }
@@ -3109,7 +3105,14 @@ static int opt_start_time(const char *opt, const char *arg)
 
 static int opt_recording_timestamp(const char *opt, const char *arg)
 {
-    recording_timestamp = parse_time_or_die(opt, arg, 0) / 1000000;
+    char buf[128];
+    int64_t recording_timestamp = parse_time_or_die(opt, arg, 0) / 1E6;
+    struct tm time = *gmtime((time_t*)&recording_timestamp);
+    strftime(buf, sizeof(buf), "creation_time=%FT%T%z", &time);
+    opt_metadata("metadata", buf);
+
+    av_log(NULL, AV_LOG_WARNING, "%s is deprecated, set the 'creation_time' metadata "
+                                 "tag instead.\n", opt);
     return 0;
 }
 
@@ -3823,8 +3826,6 @@ static void opt_output_file(const char *filename)
         if (use_subtitle) new_subtitle_stream(oc, nb_output_files);
         if (use_data)     new_data_stream(oc, nb_output_files);
 
-        oc->timestamp = recording_timestamp;
-
         av_dict_copy(&oc->metadata, metadata, 0);
         av_dict_free(&metadata);
     }

libavformat/avformat.h

@@ -674,7 +674,12 @@ typedef struct AVFormatContext {
     AVStream **streams;
     char filename[1024]; /**< input or output filename */
     /* stream info */
-    int64_t timestamp;
+#if FF_API_TIMESTAMP
+    /**
+     * @deprecated use 'creation_time' metadata tag instead
+     */
+    attribute_deprecated int64_t timestamp;
+#endif
 
     int ctx_flags; /**< Format-specific flags, see AVFMTCTX_xx */
     /* private data for pts handling (do not modify directly). */

libavformat/dvenc.c

@@ -43,7 +43,7 @@ struct DVMuxContext {
     AVStream         *ast[2];        /* stereo audio streams */
     AVFifoBuffer     *audio_data[2]; /* FIFO for storing excessive amounts of PCM */
     int               frames;        /* current frame number */
-    time_t            start_time;    /* recording start time */
+    int64_t           start_time;    /* recording start time */
     int               has_audio;     /* frame under contruction has audio */
     int               has_video;     /* frame under contruction has video */
     uint8_t           frame_buf[DV_MAX_FRAME_SIZE]; /* frame under contruction */
@@ -290,6 +290,7 @@ static DVMuxContext* dv_init_mux(AVFormatContext* s)
 {
     DVMuxContext *c = s->priv_data;
     AVStream *vst = NULL;
+    AVDictionaryEntry *t;
     int i;
 
     /* we support at most 1 video and 2 audio streams */
@@ -337,7 +338,16 @@ static DVMuxContext* dv_init_mux(AVFormatContext* s)
     c->frames     = 0;
     c->has_audio  = 0;
     c->has_video  = 0;
-    c->start_time = (time_t)s->timestamp;
+#if FF_API_TIMESTAMP
+    if (s->timestamp)
+        c->start_time = s->timestamp;
+    else
+#endif
+    if (t = av_dict_get(s->metadata, "creation_time", NULL, 0)) {
+        struct tm time = {0};
+        strptime(t->value, "%Y - %m - %dT%T", &time);
+        c->start_time = mktime(&time);
+    }
 
     for (i=0; i < c->n_ast; i++) {
         if (c->ast[i] && !(c->audio_data[i]=av_fifo_alloc(100*AVCODEC_MAX_AUDIO_FRAME_SIZE))) {

libavformat/gxfenc.c

@@ -394,6 +394,20 @@ static int gxf_write_umf_material_description(AVFormatContext *s)
     GXFContext *gxf = s->priv_data;
     AVIOContext *pb = s->pb;
     int timecode_base = gxf->time_base.den == 60000 ? 60 : 50;
+    int64_t timestamp = 0;
+    AVDictionaryEntry *t;
+
+#if FF_API_TIMESTAMP
+    if (s->timestamp)
+        timestamp = s->timestamp;
+    else
+#endif
+    if (t = av_dict_get(s->metadata, "creation_time", NULL, 0)) {
+        struct tm time = {0};
+        strptime(t->value, "%Y - %m - %dT%T", &time);
+        timestamp = mktime(&time);
+    }
+
 
     // XXX drop frame
     uint32_t timecode =
@@ -409,8 +423,8 @@ static int gxf_write_umf_material_description(AVFormatContext *s)
     avio_wl32(pb, gxf->nb_fields); /* mark out */
     avio_wl32(pb, 0); /* timecode mark in */
     avio_wl32(pb, timecode); /* timecode mark out */
-    avio_wl64(pb, s->timestamp); /* modification time */
-    avio_wl64(pb, s->timestamp); /* creation time */
+    avio_wl64(pb, timestamp); /* modification time */
+    avio_wl64(pb, timestamp); /* creation time */
     avio_wl16(pb, 0); /* reserved */
     avio_wl16(pb, 0); /* reserved */
     avio_wl16(pb, gxf->audio_tracks);

libavformat/movenc.c

@@ -2129,6 +2129,7 @@ static int mov_write_header(AVFormatContext *s)
 {
     AVIOContext *pb = s->pb;
     MOVMuxContext *mov = s->priv_data;
+    AVDictionaryEntry *t;
     int i, hint_track = 0;
 
     if (!s->pb->seekable) {
@@ -2259,7 +2260,18 @@ static int mov_write_header(AVFormatContext *s)
     }
 
     mov_write_mdat_tag(pb, mov);
-    mov->time = s->timestamp + 0x7C25B080; //1970 based -> 1904 based
+
+#if FF_API_TIMESTAMP
+    if (s->timestamp)
+        mov->time = s->timestamp;
+    else
+#endif
+    if (t = av_dict_get(s->metadata, "creation_time", NULL, 0)) {
+        struct tm time = {0};
+        strptime(t->value, "%Y - %m - %dT%T", &time);
+        mov->time = mktime(&time);
+    }
+    mov->time += 0x7C25B080; //1970 based -> 1904 based
 
     if (mov->chapter_track)
         mov_create_chapter_track(s, mov->chapter_track);

libavformat/mxfenc.c

@@ -1407,6 +1407,8 @@ static int mxf_write_header(AVFormatContext *s)
     int i;
     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};
     const int *samples_per_frame = NULL;
+    AVDictionaryEntry *t;
+    int64_t timestamp = 0;
 
     if (!s->nb_streams)
         return -1;
@@ -1512,8 +1514,18 @@ static int mxf_write_header(AVFormatContext *s)
         sc->order = AV_RB32(sc->track_essence_element_key+12);
     }
 
+#if FF_API_TIMESTAMP
     if (s->timestamp)
-        mxf->timestamp = mxf_parse_timestamp(s->timestamp);
+        timestamp = s->timestamp;
+    else
+#endif
+    if (t = av_dict_get(s->metadata, "creation_time", NULL, 0)) {
+        struct tm time = {0};
+        strptime(t->value, "%Y - %m - %dT%T", &time);
+        timestamp = mktime(&time);
+    }
+    if (timestamp)
+        mxf->timestamp = mxf_parse_timestamp(timestamp);
     mxf->duration = -1;
 
     mxf->timecode_track = av_mallocz(sizeof(*mxf->timecode_track));

libavformat/version.h

@@ -83,5 +83,8 @@
 #ifndef FF_API_LOOP_OUTPUT
 #define FF_API_LOOP_OUTPUT             (LIBAVFORMAT_VERSION_MAJOR < 54)
 #endif
+#ifndef FF_API_TIMESTAMP
+#define FF_API_TIMESTAMP               (LIBAVFORMAT_VERSION_MAJOR < 54)
+#endif
 
 #endif /* AVFORMAT_VERSION_H */