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fftools/ffmpeg: deprecate -fps_mode/vsync drop 

It depends on the ability of muxers to generate timestamps, which is
itself deprecated.
This commit is contained in:
Anton Khirnov 2023-12-14 13:42:17 +01:00
parent 8a11724a02
commit 3dc319587f
5 changed files with 18 additions and 6 deletions
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3
doc/ffmpeg.texi
View File

@ -1742,9 +1742,6 @@ constant frame rate.
@item vfr (2)
Frames are passed through with their timestamp or dropped so as to
prevent 2 frames from having the same timestamp.
@item drop
As passthrough but destroys all timestamps, making the muxer generate
fresh timestamps based on frame-rate.
@item auto (-1)
Chooses between cfr and vfr depending on muxer capabilities. This is the
default method.

3
fftools/ffmpeg.h
View File

@ -60,6 +60,7 @@
#define FFMPEG_OPT_ENC_TIME_BASE_NUM 1
#define FFMPEG_OPT_TOP 1
#define FFMPEG_OPT_FORCE_KF_SOURCE_NO_DROP 1
#define FFMPEG_OPT_VSYNC_DROP 1
#define FFMPEG_ERROR_RATE_EXCEEDED FFERRTAG('E', 'R', 'E', 'D')
@ -69,7 +70,9 @@ enum VideoSyncMethod {
VSYNC_CFR,
VSYNC_VFR,
VSYNC_VSCFR,
#if FFMPEG_OPT_VSYNC_DROP
VSYNC_DROP,
#endif
};
enum EncTimeBase {

9
fftools/ffmpeg_filter.c
View File

@ -2104,8 +2104,11 @@ static void video_sync_process(OutputFilterPriv *ofp, AVFrame *frame,
if (delta0 < 0 &&
delta > 0 &&
ost->vsync_method != VSYNC_PASSTHROUGH &&
ost->vsync_method != VSYNC_DROP) {
ost->vsync_method != VSYNC_PASSTHROUGH
#if FFMPEG_OPT_VSYNC_DROP
&& ost->vsync_method != VSYNC_DROP
#endif
) {
if (delta0 < -0.6) {
av_log(ost, AV_LOG_VERBOSE, "Past duration %f too large\n", -delta0);
} else
@ -2143,7 +2146,9 @@ static void video_sync_process(OutputFilterPriv *ofp, AVFrame *frame,
ofp->next_pts = llrint(sync_ipts);
frame->duration = llrint(duration);
break;
#if FFMPEG_OPT_VSYNC_DROP
case VSYNC_DROP:
#endif
case VSYNC_PASSTHROUGH:
ofp->next_pts = llrint(sync_ipts);
frame->duration = llrint(duration);

2
fftools/ffmpeg_mux.c
View File

@ -150,8 +150,10 @@ static int write_packet(Muxer *mux, OutputStream *ost, AVPacket *pkt)
goto fail;
}
#if FFMPEG_OPT_VSYNC_DROP
if (ost->type == AVMEDIA_TYPE_VIDEO && ost->vsync_method == VSYNC_DROP)
pkt->pts = pkt->dts = AV_NOPTS_VALUE;
#endif
// rescale timestamps to the stream timebase
if (ost->type == AVMEDIA_TYPE_AUDIO && !ost->enc) {

7
fftools/ffmpeg_opt.c
View File

@ -188,7 +188,12 @@ int parse_and_set_vsync(const char *arg, int *vsync_var, int file_idx, int st_id
if (!av_strcasecmp(arg, "cfr")) *vsync_var = VSYNC_CFR;
else if (!av_strcasecmp(arg, "vfr")) *vsync_var = VSYNC_VFR;
else if (!av_strcasecmp(arg, "passthrough")) *vsync_var = VSYNC_PASSTHROUGH;
else if (!av_strcasecmp(arg, "drop")) *vsync_var = VSYNC_DROP;
#if FFMPEG_OPT_VSYNC_DROP
else if (!av_strcasecmp(arg, "drop")) {
av_log(NULL, AV_LOG_WARNING, "-vsync/fps_mode drop is deprecated\n");
*vsync_var = VSYNC_DROP;
}
#endif
else if (!is_global && !av_strcasecmp(arg, "auto")) *vsync_var = VSYNC_AUTO;
else if (!is_global) {
av_log(NULL, AV_LOG_FATAL, "Invalid value %s specified for fps_mode of #%d:%d.\n", arg, file_idx, st_idx);