Related Manuals for Visual Circuits ReelTime 2
Summary of Contents for Visual Circuits ReelTime 2
- Page 1 ReelTime Series Board Encoding Parameters User Manual Visual Circuits Corporation...
- Page 2 The Visual Circuits logo is a registered trademark in the United States and other countries. All other products, services or company names mentioned herein are claimed as trademarks and trade names by their respective companies. Visual Circuits, 1999-2000. All rights reserved. No portion of this manual may be copied by any means without the prior consent of Visual Circuits.
- Page 3 Required Encoding Parameters ....1 Encoding Recommendations.....2 Stuttering files during Playback .
- Page 5 1. Files must be program stream MPEG2 files of audio/video, video only or audio only. Visual Circuits 4ReelTime Pro, 4ReelTime RGB and MPEG Plus products do not currently support transport stream MPEG files decoding. 2. Use 4:2:0, not 4:2:2 encoding. 3.
- Page 6 1. Resolution: 720 X 480 or 704 X 480 in NTSC; 704 X 576 in PAL. 2. Closed GOP (Group of Pictures) with an “I-frame” every 15 frames is recommended. 3. The recommended audio bit rate is 384kbps and a sampling rate of 48khz.
- Page 7 files. At a minimum, listen to and compare files. Even if encoding is done at the same production facility, variances between sessions may occur. Once the MPEGs are encoded, the manipulation of the audio for each individual file is highly impractical.
- Page 9 Irregular playback on single and multiple channels can be caused by a number of conditions: 1. Uneven audio to video track lengths: Confirm the length of the audio track to the length of the video track. The Visual Circuits VCC4PRO driver, standard with all Visual Circuits boards and digital servers, aggressively synchronizes the audio and video data of the MPEG file to maintain Audio/Visual (AV) Sync.
- Page 10 4. Cross channel synchronization requires equal playback duration of MPEG files: For cross channel sync all MPEG files must have equal playback duration. If in a synchronized group of channels, files vary in length, the driver will attempt to synchronize these unevenly matched files and cause "stuttering".
- Page 11 changes, to verify the overall effect on the presentation, especially in regards to cross channel synchronization. Incorporating a delay between files or calling the "mpgblack" command, which is actually a function call on the decoder card, will not solve the problem. Some SMPTE tracks loose information during compression and may not "trigger"...
- Page 13 Graphic Interchange Format (GIF) files are created with standard graphics authoring programs. The following are basic creation guidelines and playback tips: 1. The width, or "X" axis, f the GIF’s resolution must be a multiple of 16 pixels. 2. GIF must be 16-color non-interlaced format. A palette of exactly 16 colors (any colors) can be used.
- Page 15 audio stream 3 audio test tones 3 bit rate 2 color bars 3 crosschannel synchronization 3 DVMPEG 3 GIF files 9 IDE hard drive 1 MPEG Layer 2 1 MPEG2 1, 2 SCSI 1 SCSI hard drive 1 SMPTE 3 still images 3 video stream 3...
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Page 17: Revision History
Revision History 813-0015a (December 2000)ECO#693 Publication number went from 50018 a to 813-0015a. Title of manual changed. Note regarding volume control was removed.
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