The mov/mp4 muxer has support for handling negative timestamps
via edit lists (which customarily is used for handling the 1-frame
delay due to B-frames as well).
Using the muxer's native way of handling it is better than using
the generic offsetting. The generic offsetting is a bit too
crude when e.g. the timebase of one track is 1/fps, where the
edit lists can handle it accurately.
---
libavformat/movenc.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index afa03e3..ec8bf77 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -3283,7 +3283,7 @@ AVOutputFormat ff_mov_muxer = {
.write_header = mov_write_header,
.write_packet = mov_write_packet,
.write_trailer = mov_write_trailer,
- .flags = AVFMT_GLOBALHEADER | AVFMT_ALLOW_FLUSH,
+ .flags = AVFMT_GLOBALHEADER | AVFMT_ALLOW_FLUSH |
AVFMT_TS_NEGATIVE,
.codec_tag = (const AVCodecTag* const []){
ff_codec_movvideo_tags, ff_codec_movaudio_tags, 0
},
@@ -3302,7 +3302,7 @@ AVOutputFormat ff_tgp_muxer = {
.write_header = mov_write_header,
.write_packet = mov_write_packet,
.write_trailer = mov_write_trailer,
- .flags = AVFMT_GLOBALHEADER | AVFMT_ALLOW_FLUSH,
+ .flags = AVFMT_GLOBALHEADER | AVFMT_ALLOW_FLUSH |
AVFMT_TS_NEGATIVE,
.codec_tag = (const AVCodecTag* const []){ codec_3gp_tags, 0 },
.priv_class = &tgp_muxer_class,
};
@@ -3321,7 +3321,7 @@ AVOutputFormat ff_mp4_muxer = {
.write_header = mov_write_header,
.write_packet = mov_write_packet,
.write_trailer = mov_write_trailer,
- .flags = AVFMT_GLOBALHEADER | AVFMT_ALLOW_FLUSH,
+ .flags = AVFMT_GLOBALHEADER | AVFMT_ALLOW_FLUSH |
AVFMT_TS_NEGATIVE,
.codec_tag = (const AVCodecTag* const []){ ff_mp4_obj_type, 0 },
.priv_class = &mp4_muxer_class,
};
@@ -3339,7 +3339,7 @@ AVOutputFormat ff_psp_muxer = {
.write_header = mov_write_header,
.write_packet = mov_write_packet,
.write_trailer = mov_write_trailer,
- .flags = AVFMT_GLOBALHEADER | AVFMT_ALLOW_FLUSH,
+ .flags = AVFMT_GLOBALHEADER | AVFMT_ALLOW_FLUSH |
AVFMT_TS_NEGATIVE,
.codec_tag = (const AVCodecTag* const []){ ff_mp4_obj_type, 0 },
.priv_class = &psp_muxer_class,
};
@@ -3356,7 +3356,7 @@ AVOutputFormat ff_tg2_muxer = {
.write_header = mov_write_header,
.write_packet = mov_write_packet,
.write_trailer = mov_write_trailer,
- .flags = AVFMT_GLOBALHEADER | AVFMT_ALLOW_FLUSH,
+ .flags = AVFMT_GLOBALHEADER | AVFMT_ALLOW_FLUSH |
AVFMT_TS_NEGATIVE,
.codec_tag = (const AVCodecTag* const []){ codec_3gp_tags, 0 },
.priv_class = &tg2_muxer_class,
};
@@ -3374,7 +3374,7 @@ AVOutputFormat ff_ipod_muxer = {
.write_header = mov_write_header,
.write_packet = mov_write_packet,
.write_trailer = mov_write_trailer,
- .flags = AVFMT_GLOBALHEADER | AVFMT_ALLOW_FLUSH,
+ .flags = AVFMT_GLOBALHEADER | AVFMT_ALLOW_FLUSH |
AVFMT_TS_NEGATIVE,
.codec_tag = (const AVCodecTag* const []){ codec_ipod_tags, 0 },
.priv_class = &ipod_muxer_class,
};
@@ -3392,7 +3392,7 @@ AVOutputFormat ff_ismv_muxer = {
.write_header = mov_write_header,
.write_packet = mov_write_packet,
.write_trailer = mov_write_trailer,
- .flags = AVFMT_GLOBALHEADER | AVFMT_ALLOW_FLUSH,
+ .flags = AVFMT_GLOBALHEADER | AVFMT_ALLOW_FLUSH |
AVFMT_TS_NEGATIVE,
.codec_tag = (const AVCodecTag* const []){ ff_mp4_obj_type, 0 },
.priv_class = &ismv_muxer_class,
};
--
1.7.9.4
_______________________________________________
libav-devel mailing list
[email protected]
https://lists.libav.org/mailman/listinfo/libav-devel
