Timecode skipped in drawtext filter

[rmk]

when transcoding a certain file from the apple trailers section, I get strange behaviour with the drawtext filter in that the timecode 00:00:00:01 stays for two frames and then everything appears to be normal. I haven't been able to reproduce this with another file but this one:

​http://trailers.apple.com/movies/dreamworks/megamind/megamind-tlr2_h480p.mov

here's the command line and output:

ffmpeg -i Megamind.mov -t 10 -vcodec mpeg4 -acodec copy -vf drawtext="fontfile=/System/Library/Fonts/HelveticaLight.ttf:timecode='00\\:00\\:00\\:00':rate=24:x=10:y=60-descent:fontsize=24:fontcolor=white" -qscale 1 -y drawtexttest-megamind-net.mov

ffmpeg version N-39366-g247fbf0 Copyright (c) 2000-2012 the FFmpeg developers

built on Mar 28 2012 17:12:08 with gcc 4.2.1 (Apple Inc. build 5664)
configuration: --enable-gpl --enable-libfreetype
libavutil 51. 44.100 / 51. 44.100
libavcodec 54. 12.100 / 54. 12.100
libavformat 54. 3.100 / 54. 3.100
libavdevice 53. 4.100 / 53. 4.100
libavfilter 2. 66.101 / 2. 66.101
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 10.100 / 0. 10.100
libpostproc 52. 0.100 / 52. 0.100

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/krueger/Documents/Megamind.mov':

Metadata:

major_brand : qt
minor_version : 537199360
compatible_brands: qt
creation_time : 2012-03-28 15:59:28
comment : Encoded and delivered by apple.com/trailers/
comment-eng : Encoded and delivered by apple.com/trailers/
copyright : © 2010 Dreamworks Pictures. All Rights Reserved
copyright-eng : © 2010 Dreamworks Pictures. All Rights Reserved
title : Megamind
title-eng : Megamind

Duration: 00:02:29.50, start: 0.000000, bitrate: 2344 kb/s

Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 848x352, 2209 kb/s, 24 fps, 24 tbr, 2400 tbn, 4800 tbc
Metadata:

creation_time : 2012-03-28 15:59:28
handler_name : ?Apple Alias Data Handler

Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, s16, 131 kb/s
Metadata:

creation_time : 2012-03-28 15:59:28
handler_name : ?Apple Alias Data Handler

Stream #0:2(eng): Data: none (tmcd / 0x64636D74)
Metadata:

creation_time : 2012-03-28 15:59:28
handler_name : ?Apple Alias Data Handler
timecode : 00:00:00:00

Please use -q:a or -q:v, -qscale is ambiguous
[buffer @ 0x101013060] w:848 h:352 pixfmt:yuv420p tb:1/1000000 sar:0/1 sws_param:
Output #0, mov, to 'drawtexttest-megamind-net.mov':

Metadata:

major_brand : qt
minor_version : 537199360
compatible_brands: qt
creation_time : 2012-03-28 15:59:28
comment : Encoded and delivered by apple.com/trailers/
comment-eng : Encoded and delivered by apple.com/trailers/
copyright : © 2010 Dreamworks Pictures. All Rights Reserved
copyright-eng : © 2010 Dreamworks Pictures. All Rights Reserved
title : Megamind
title-eng : Megamind
encoder : Lavf54.3.100
Stream #0:0(eng): Video: mpeg4 (mp4v / 0x7634706D), yuv420p, 848x352, q=2-31, 200 kb/s, 24 tbn, 24 tbc
Metadata:

creation_time : 2012-03-28 15:59:28
handler_name : ?Apple Alias Data Handler

Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, 131 kb/s
Metadata:

creation_time : 2012-03-28 15:59:28
handler_name : ?Apple Alias Data Handler

Stream mapping:

Stream #0:0 -> #0:0 (h264 -> mpeg4)
Stream #0:1 -> #0:1 (copy)

Press [q] to stop, ? for help
[h264 @ 0x1020bd600] Increasing reorder buffer to 1
frame= 240 fps=0.0 q=1.0 Lsize= 3115kB time=00:00:10.00 bitrate=2552.2kbits/s dup=1 drop=0
video:2983kB audio:126kB global headers:0kB muxing overhead 0.207059%

[rmk]

Sorry, the title is misleading. It seems that one frame is simply duplicated and that this is the real issue and not related to the drawtext filter:

[h264 @ 0x1020bd600] Increasing reorder buffer to 1
frame= 240 fps=0.0 q=1.0 Lsize= 3115kB time=00:00:10.00 bitrate=2552.2kbits/s dup=1

Rendering a timecode on the video just made it obvious.

[rmk]

With current git master the error message regarding reorder buffer is gone but the frame is still duplicated

[Elon Musk]

There is nothing to fix, use setpts filter if you need continuous and monotonic timestamps.