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Old 04-30-2012, 07:34 AM   #105
Mwhlr
Human being with feelings
 
Join Date: Apr 2012
Posts: 6
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Hi there!

Iíve been using Reaper for quite a while now for audio post production, but have very rarely had to render a video. Now, I have a video I want to use as part of a portfolio, but Iím running into issues. I am using Reaper 32-bit and the Zeranoe FFMpeg build specified for this version in the initial post.

Whenever I try to render out my video, I get black flickers randomly throughout. These occur every couple of seconds. I have tried every format and codec available, but I have no luck Ė the black flickers always appear and are always in the same place. These flickers are not present when the video is played before rendering or outwith Reaper.

I have been using a compressed, low quality version of the video to do my audio-post. This video ran very well, even with a large number of tracks and effects present in the project. Rendering out this low quality version of the video isnít an issue. There are never any flickers.


The source properties for the compressed, low quality version:

Length: 2:56.300
Video: 640x360@30.00fps, Aspect=1.00, Decoding format=RGB
Audio: 44100Hz 2ch 16bps

Using FFmpeg DLL decoder v53.16.0 (--disable-static --enable-shared --enable-gpl --enable-version3 --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib)

Video: mjpeg (mjpa / 0x61706A6D), yuvj422p, 640x360 [SAR 72:72 DAR 16:9], 9793 kb/s
Audio: pcm_s16be (twos / 0x736F7774), 44100 Hz, 2 channels, s16, 1411 kb/s


Once I had completed my soundtrack, I rendered it as a single stereo wav file (44.1KHz 16-Bit) and imported this into a clean project with the original quality version of the video. This video, in contrast, does not run well in the editor, even in such a simple project. When playing the video, it stutters and sometimes isnít as smooth as it should be. The CPU load is around 25 Ė 30%. There are no black lines however.

The source properties of the high quality video:


Length: 2:56.300
Video: 1280x720@30.00fps, Aspect=1.00, Decoding format=YV12
Audio: 44100Hz 2ch 16bps

Using FFmpeg DLL decoder v53.16.0 (--disable-static --enable-shared --enable-gpl --enable-version3 --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib)

Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720, 1890 kb/s
Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, s16, 151 kb/s


Any thoughts? I can only think that it has something to do with how badly Reaper handles this video within the editor, but surely that wouldnít matter during a render, as the software doesnít have to do it in real time?

My system specs are as follows:

Windows 7 professional 64-bit
2x Dual-Core AMD Opteron Processor 2220 (Hyper Threaded - 8 logical Cores) ~ 2.8 GHz

16GB RAM
AMD Radeon HD 6870

Any help would be appreciated!
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