Opened 9 years ago

Closed 9 years ago

#1469 closed defect (invalid)

Timecode too fast after Yadif

Reported by: Jan Grewe Owned by:
Priority: normal Component: avfilter
Version: 0.11.1 Keywords: yadif, drawtext, timecode
Cc: Blocked By:
Blocking: Reproduced by developer: yes
Analyzed by developer: no

Description

Summary of the bug: The timecode added through the drawtext videofilter is running at 2x the framerate when yadif is used to deinterlace the source material

How to reproduce:

$ /usr/local/bin/ffmpeg -y -threads 4 -i test.m2v -c:v libx264 -b:v 3072k -vf "yadif=1:1, crop=720:576:0:32, scale=640:480, drawtext=fontfile=/usr/share/fonts/truetype/ttf-bitstream-vera/VeraMono.ttf:fontsize=28:fontcolor=white:box=1:boxcolor=0x000000CC:x=(w-tw)/2:y=h-(2*lh):timecode='00\:00\:00\:00':rate=25" -pix_fmt yuv420p -f mp4 /srv/test.mp4


ffmpeg version 0.11.1
built on Jun 19 2012 16:28:33 with gcc 4.6.3
configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-nonfree --enable-postproc --enable-libfreetype --enable-version3 --enable-x11grab --enable-libass --enable-fontconfig
libavutil      51. 54.100 / 51. 54.100
libavcodec     54. 23.100 / 54. 23.100
libavformat    54.  6.100 / 54.  6.100
libavdevice    54.  0.100 / 54.  0.100
libavfilter     2. 77.100 /  2. 77.100
libswscale      2.  1.100 /  2.  1.100
libswresample   0. 15.100 /  0. 15.100
libpostproc    52.  0.100 / 52.  0.100

Attachments (1)

test.mp4 (196.7 KB ) - added by Jan Grewe 9 years ago.
sample video with timecode

Download all attachments as: .zip

Change History (5)

by Jan Grewe, 9 years ago

Attachment: test.mp4 added

sample video with timecode

comment:1 by Clément Bœsch, 9 years ago

Status: newopen

As discussed on IRC, this is reproducible because of the yadif filter, which seems to be calling the end_frame() from drawtext filter too much (→ even when dropping a frame).

@jangrewe: can you provide the source sample so we can reproduce it?

comment:3 by Michael Niedermayer, 9 years ago

yadif=1:1 turns each field (2 per frame) into a frame, thus the rate doubles.

comment:4 by Michael Niedermayer, 9 years ago

Reproduced by developer: set
Resolution: invalid
Status: openclosed

This issue happens because you double the framerate fro, 25 to 50 with yadif but specify 25 to the drawtext filter instead of 50

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