0002138: videos become twice as long as they should when rendered

View Issue Details [ Jump to Notes ]

[ Issue History ] [ Print ]

Project

Category

View Status

Date Submitted

Last Update

0002138

Kdenlive

Rendering

public

2011-05-24 23:07

2011-11-01 18:56

Reporter

igloo

Assigned To

j-b-m

Priority

normal

Severity

major

Reproducibility

sometimes

Status

closed

Resolution

fixed

Platform

amd64

Debian

OS Version

unstable

Product Version

Recent git

Target Version

Fixed in Version

0.8.2

Summary

0002138: videos become twice as long as they should when rendered

Description

I have some 50 frames per second progressive videos, e.g.
http://urchin.earth.li/~ian/video_problem/half_speed_rendering_problem.MTS.mov [^]
(ffprobe output in "additional information" box). This clip is 4 seconds long.

If I have an "HD1080p 50fps" project, and I render to "PAL 1080 50i" "untitled.m2t" or "DVD/PAL/PAL 16:9 VOB" "untitled.vob" then I get an 8 second clip.

However, if I have a "DV/DVD Widescreen PAL" project, then rendering gives me a 4 second clip.

I would expect to get a 4 second result with a "HD1080p 50fps" project.

I have:

$ kdenlive --version
Qt: 4.7.3
KDE Development Platform: 4.4.5 (KDE 4.4.5)
Kdenlive: 0.8.1 (rev. 5604)

Steps To Reproduce

Select project type, add clip to project, put clip on timeline, and render project.

Additional Information

$ ffprobe 00001.MTS.mov
ffprobe version git-N-30047-g3c7650a, Copyright (c) 2007-2011 the FFmpeg developers
  built on May 19 2011 14:24:20 with gcc 4.6.1 20110507 (prerelease)
  configuration: --prefix=/home/ian/code/ffmpeg/inst --enable-gpl --enable-version3 --enable-postproc --enable-swscale --enable-x11grab --enable-avfilter --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --enable-frei0r --enable-shared --enable-nonfree --enable-libdc1394 --enable-libdirac --enable-libfreetype --enable-libopenjpeg --enable-librtmp --enable-libx264
  libavutil 51. 2. 1 / 51. 2. 1
  libavcodec 53. 6. 0 / 53. 6. 0
  libavformat 53. 1. 0 / 53. 1. 0
  libavdevice 53. 0. 0 / 53. 0. 0
  libavfilter 2. 5. 0 / 2. 5. 0
  libswscale 0. 14. 0 / 0. 14. 0
  libpostproc 51. 2. 0 / 51. 2. 0
Input #0, mpegts, from '00001.MTS.mov':
  Duration: 00:00:04.16, start: 1.400000, bitrate: 3126 kb/s
  Program 1
    Metadata:
      service_name : Service01
      service_provider: FFmpeg
    Stream #0.0[0x100]: Video: mpeg2video (Main), yuv420p, 960x540 [PAR 1:1 DAR 16:9], 104857 kb/s, 50 fps, 50 tbr, 90k tbn, 100 tbc
    Stream #0.1[0x101]: Audio: ac3, 48000 Hz, 5.1, s16, 448 kb/s

Tags

No tags attached.

Build/Install Method

Manual build from SVN

Attached Files

Relationships

Notes
(0006737) FishB8 (reporter) 2011-05-26 06:27	Similar problem: 0002129 Render profiles don't appear to specify frame rate, which screws things up when rendering to a profile with different frame / field settings than the project's profile. Also ffmpeg's support for creating interlaced output from a progressive source is somewhat lacking. I've always had best results piping it through y4minterlace from mjpegtools, but that functionality is not available from within kdenlive's profiles...

(0006738) igloo (reporter) 2011-05-26 13:13	I'm not sure I understand. Isn't share/mlt/profiles/dv_pal_wide the render profile? It contains frame_rate_num=25 frame_rate_den=1

(0006740) igloo (reporter) 2011-05-27 02:12	In: http://sourceforge.net/mailarchive/forum.php?thread_name=BANLkTi%3DB8DtihELobgvzz76XaPNe1KrbWg%40mail.gmail.com&forum_name=mlt-devel [^] Dan Dennedy says: MLT does not support a mismatch in framerate between the project profile (atsc_1080p_50) and the render profile (dv_pal_wide). All other attribute differences (resolution, framerate, progressiveness) are supported, just not yet framerate. The fact that Kdenlive lets you create this combination is a known bug in Kdenlive.

(0006814) j-b-m (administrator) 2011-06-06 18:13	Fixed in current svn, rendering to a profile with frame rate different than project profile's frame rate is not allowed anymore

Issue History
Date Modified	Username	Field	Change
2011-05-24 23:07	igloo	New Issue
2011-05-26 06:27	FishB8	Note Added: 0006737
2011-05-26 13:13	igloo	Note Added: 0006738
2011-05-27 02:12	igloo	Note Added: 0006740
2011-06-06 18:13	j-b-m	Note Added: 0006814
2011-06-06 18:13	j-b-m	Status	new => resolved
2011-06-06 18:13	j-b-m	Fixed in Version	=> Recent git
2011-06-06 18:13	j-b-m	Resolution	open => fixed
2011-06-06 18:13	j-b-m	Assigned To	=> j-b-m
2011-07-05 12:15	j-b-m	Fixed in Version	Recent git => 0.8.2
2011-11-01 18:56	j-b-m	Status	resolved => closed