diff --git a/libavformat/adtsenc.c b/libavformat/adtsenc.c
index e7c9ca6ce11d2c99ae9d02753578f28655e46ae1..bf7a62ae70de0512f5523d790fc90d67a71044d2 100644
--- a/libavformat/adtsenc.c
+++ b/libavformat/adtsenc.c
@@ -172,4 +172,5 @@ AVOutputFormat ff_adts_muxer = {
     .video_codec       = AV_CODEC_ID_NONE,
     .write_header      = adts_write_header,
     .write_packet      = adts_write_packet,
+    .flags             = AVFMT_NOTIMESTAMPS,
 };
diff --git a/libavformat/amr.c b/libavformat/amr.c
index 3b1a468e34fd38355f4e8cfa969c68ce06b0d62a..afd062ee36f47c5bbf3ab1bdc8d8ba73f2e5d7ca 100644
--- a/libavformat/amr.c
+++ b/libavformat/amr.c
@@ -176,5 +176,6 @@ AVOutputFormat ff_amr_muxer = {
     .video_codec       = AV_CODEC_ID_NONE,
     .write_header      = amr_write_header,
     .write_packet      = amr_write_packet,
+    .flags             = AVFMT_NOTIMESTAMPS,
 };
 #endif
diff --git a/libavformat/au.c b/libavformat/au.c
index 6b252b21cebfe1640981f1055b6c31ca91a242f6..e682cbf3058da37b44d15b9aa395454fb52ab938 100644
--- a/libavformat/au.c
+++ b/libavformat/au.c
@@ -215,6 +215,7 @@ AVOutputFormat ff_au_muxer = {
     .write_packet  = ff_raw_write_packet,
     .write_trailer = au_write_trailer,
     .codec_tag     = (const AVCodecTag* const []) { codec_au_tags, 0 },
+    .flags         = AVFMT_NOTIMESTAMPS,
 };
 
 #endif /* CONFIG_AU_MUXER */
diff --git a/libavformat/latmenc.c b/libavformat/latmenc.c
index 7270292f7aedbb819232a539f3ccea31ebdf68f1..e5e2f87a88dc821f1e6546380c2ab7e3552a5537 100644
--- a/libavformat/latmenc.c
+++ b/libavformat/latmenc.c
@@ -188,4 +188,5 @@ AVOutputFormat ff_latm_muxer = {
     .write_header   = latm_write_header,
     .write_packet   = latm_write_packet,
     .priv_class     = &latm_muxer_class,
+    .flags          = AVFMT_NOTIMESTAMPS,
 };
diff --git a/libavformat/mpjpeg.c b/libavformat/mpjpeg.c
index 2114189244ed9e12ca9c9ea49555274b9561bb3c..9e21099eaf5bfccd6db202bea36a26781ee89962 100644
--- a/libavformat/mpjpeg.c
+++ b/libavformat/mpjpeg.c
@@ -62,4 +62,5 @@ AVOutputFormat ff_mpjpeg_muxer = {
     .write_header      = mpjpeg_write_header,
     .write_packet      = mpjpeg_write_packet,
     .write_trailer     = mpjpeg_write_trailer,
+    .flags             = AVFMT_NOTIMESTAMPS,
 };
diff --git a/libavformat/omaenc.c b/libavformat/omaenc.c
index ea28e109c448510ba6ee543050dea2efb7bb9f3b..bfd552a03d3e8dfecd0867116b784a072713098b 100644
--- a/libavformat/omaenc.c
+++ b/libavformat/omaenc.c
@@ -102,4 +102,5 @@ AVOutputFormat ff_oma_muxer = {
     .write_header      = oma_write_header,
     .write_packet      = ff_raw_write_packet,
     .codec_tag         = (const AVCodecTag* const []){ff_oma_codec_tags, 0},
+    .flags             = AVFMT_NOTIMESTAMPS,
 };
diff --git a/libavformat/rsoenc.c b/libavformat/rsoenc.c
index cc76f9afd2e1062f44272874db82eba764660e83..8ebcf8193b7c0d309ef777d8376a4f8f39009fa0 100644
--- a/libavformat/rsoenc.c
+++ b/libavformat/rsoenc.c
@@ -108,4 +108,5 @@ AVOutputFormat ff_rso_muxer = {
     .write_packet   =   rso_write_packet,
     .write_trailer  =   rso_write_trailer,
     .codec_tag      =   (const AVCodecTag* const []){ff_codec_rso_tags, 0},
+    .flags          =   AVFMT_NOTIMESTAMPS,
 };
diff --git a/libavformat/soxenc.c b/libavformat/soxenc.c
index 3e5d2e351589499ee956a423ac31dc4288798b26..4b8955c280a2eaa74c2c20b9b9dabe4151dec491 100644
--- a/libavformat/soxenc.c
+++ b/libavformat/soxenc.c
@@ -125,4 +125,5 @@ AVOutputFormat ff_sox_muxer = {
     .write_header      = sox_write_header,
     .write_packet      = sox_write_packet,
     .write_trailer     = sox_write_trailer,
+    .flags             = AVFMT_NOTIMESTAMPS,
 };
diff --git a/libavformat/vocenc.c b/libavformat/vocenc.c
index d18eac2d958a6194e69474f3f9ddd1d81daf9f1c..ed10a96f7ab3e72f8f66cd5355d277d0f5c3dc1d 100644
--- a/libavformat/vocenc.c
+++ b/libavformat/vocenc.c
@@ -101,4 +101,5 @@ AVOutputFormat ff_voc_muxer = {
     .write_packet      = voc_write_packet,
     .write_trailer     = voc_write_trailer,
     .codec_tag         = (const AVCodecTag* const []){ ff_voc_codec_tags, 0 },
+    .flags             = AVFMT_NOTIMESTAMPS,
 };