I am working with 3D (stereoscopic) material. After editing, I render the project to anaglyph 3D, i.e. green/magenta.
To do so, I apply the SOP/SAT effect to the clips for the left and right eye views and add an addition transition.
This results in a correct full colour anaglyph 3D video.
So here the issue:
If I save a frame from the monitor, I get a perfect PNG that looks exactly the same as when I do the whole procedure manually in Gimp.
If I render to DNxHD (custom render profile), I get the same nice quality when playing the video in i.e. VLC.
But if I render to H.264, quite some crosstalk/ghosting occurs, so I assume that there is some quality sacrifice impacting the colours that causes this.
This can be compensated with adjusting colours (saturation, ...) in VLC or other players to some extent, but the quality is never as good as with PNG or DNxHD.
I also tried other formats (MPEG2/4, ...) but it is either the same or even worse.
When I render a file with original size sound is ok, but when I resize movie sounds stop to early and it is not synchronized with video.
( maybe it the same problem like: http://www.kdenlive.org/forum/moved-audio-after-rendering )
I see this problem in webM and h.264 ( not tests other )
I have a problem with new build of kdenlive [0.9.7 (rev. v0.9.6-127-g1dd98a7)] - rendering the destination video (1024x768) with source (1024x768) gives some border around. using the same source (and same project file) within kdenlive 0.9.5 (rev. v0.9.4-116-g3b84694] gives me proper borderless video.
edit: after downgrading, upgrading, manual compiling of components, I cannot reproduce problem. I have screwed up something before (?)
Submitted by Geoffrey Tucker on Sat, 06/08/2013 - 12:03
Hi, I have assembled an edited video file on the timeline, when I try to render it, it always hangs at 99% and will not complete, it is very frustrating as I have tried it seven times now.
I am using Linux Mint on my computer.
Please can anyone help, thanks Geoff.
small H264 (800 & 1000 bit rate) rendered file (while it plays-back on Ubuntu okay, results only in a black screen with audio when accessed on other browsers/platforms).... this used to work perfectly: totally miffed! appreciate suggestions! /:b
Submitted by chuck_theobald on Sat, 06/01/2013 - 04:55
I have a video from a Sony HDR-CX190 that shows as 3:19:04 in kdenlive. The file from the Sony is in .mts format. I choose Raw DV, DV NTSC 4:3 for rendering. The rendered video looks great, but stops at 2:46:00, which is short, missing the last 33 seconds of the recording. Being new to kdenlive, my first question is, why?
Submitted by american-crusader on Tue, 05/28/2013 - 21:08
First of all Kdenlive has been working flawlessly for me since I installed it several months ago, but today when I tried to render my video it crashed! Here's the output from the terminal "melt -version":
Although it does not seem to be a Kdenlive issue, I decided to start here asking for help to track down the exact problem.
== Intro ==
I have a recording of a mounted (B) and handheld camcorder (D) and a seperate audio recording from CD (A). The audio was cut, so that it starts at the same time as the video. The video of the mounted camcorder was processed with filters of ffmpeg (C).
== Problem ==
When working in Kdenlive, the A/V delay (audio lags) between A and B/C increases up to 2.5 secs after 25 mins. Since it is a video of a live performance, it is very noticeable and undesirable. There seems to be no problem with D.
== Oddity ==
The source material is fine. I assume this because of two reasons:
1. The audio track of B and A are exactly in sync when opened in Audacity.
2. MPC-HC is able to resync A and C (by delaying audio or adjusting the play speed of video) most of the time, not A and B, though.
Let's say I have a GoPro3, recording at 120fps 720p h.264 to have the option to do slow motion. Most of the time I don't want to. How do I drop 75% of the frames from the portion of the video I want to play normally, and leave in all the frames in the slow motion portion, and render the whole thing to play at 30fps?
The goal is to get a video which plays at normal speed, is nearly 25% the size as the original, but has a chunk that plays at 1/4 speed for slow motion effect.