A P P E N D I X                           A
             Live Capture and File Format
             Reference

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Appendix A       Live Capture and File Format Reference
   Audio Formats




Table A-1   Video Formats

Video Format      ...
Appendix A   Live Capture and File Format Reference
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Appendix A    Live Capture and File Format Reference
 Live-Capture Parameters




                       Table A-2     Aud...
Appendix A     Live Capture and File Format Reference
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Appendix A   Live Capture and File Format Reference
   Live-Capture Parameters




Table A-4   Live-Capture Parameters (co...
Appendix A     Live Capture and File Format Reference
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Appendix A     Live Capture and File Format Reference
File Formats




                      Table A-5     File Formats

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Appendix A    Live Capture and File Format Reference
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Appendix A   Live Capture and File Format Reference
 Recording and Streaming Restrictions




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Live Capture and File Format Reference

  1. 1. A P P E N D I X A Live Capture and File Format Reference This appendix lists video formats, audio formats, recommended settings for audio and video codec parameters and capture card settings, and file formats. Topics covered include: • Video Formats, page A-1 • Audio Formats, page A-2 • Live-Capture Parameters, page A-4 • File Formats, page A-7 • Recording and Streaming Restrictions, page A-9 When you define a live-capture program, you must set the video format, audio format, data rate, and frame rate parameters to values appropriate to the video capture card and codec (compression/decompression) used by the IP/TV Server that will multicast the program. Video Formats Table A-1 lists common live-capture video formats, their approximate bandwidth requirements, application usage, and RTP payload. Cisco IP/TV Broadcast Server User Guide OL-4407-01 A-1
  2. 2. Appendix A Live Capture and File Format Reference Audio Formats Table A-1 Video Formats Video Format Bandwidth Usage RTP Payload MPEG-4 28–768 kbps Good image quality and optimized for low Dynamically data rates. mapped H.261 128–1000 kbps For low-motion applications such as 31 videoconferencing. MPEG-1 500–1500 kbps Motion picture or comparable VHS-quality 32 video applications. MPEG-2 Half D1 2–3.5 Mbps Half D1 offers better quality than MPEG-2 32 plus mapped Full D1. MPEG-2 Full D1 3–6 Mbps DVD-quality video and optimized for 32 plus mapped higher data rates. Audio Formats Table A-2 lists available audio formats and their approximate bandwidth requirements and RTP payloads. Table A-2 Audio Formats Bandwidth Format (kbps) RTP Payload TrueSpeech 8000 Hz mono 8 Dynamically mapped; 96 or greater Global System for Mobile 13 3 Communications (GSM) 8000 Hz mono Digital Video Interactive (DVI) 34 5 8000 Hz mono Pulse Code Modulation (PCM) 66 0 (mu-law) 8000 Hz mono MP2 (MPEG Layer 2) 64–384 14 Cisco IP/TV Broadcast Server User Guide A-2 OL-4407-01
  3. 3. Appendix A Live Capture and File Format Reference Audio Formats Table A-2 Audio Formats (continued) Bandwidth Format (kbps) RTP Payload MP3 (MPEG Layer 3) 8000 Hz 8 14 plus mapped mono MP3 11,025 Hz stereo 24 14 plus mapped MP3 22,050 Hz stereo 56 14 plus mapped AAC, 22,050 Hz stereo 32 Dynamically mapped; 96 or greater AAC, 44,100 Hz stereo 112 Dynamically mapped; 96 or greater AAC, 32,000 Hz stereo 64 Dynamically mapped; 96 or greater 8-bit linear, 8000 Hz mono 66 Dynamically mapped; 96 or greater 8-bit linear, 8000 Hz stereo 132 Dynamically mapped; 96 or greater 8-bit linear 11,025 Hz mono 91 Dynamically mapped; 96 or greater 8-bit linear 11,025 Hz stereo 182 Dynamically mapped; 96 or greater 8-bit linear 22,050 Hz mono 182 Dynamically mapped; 96 or greater 8-bit linear 22,050 Hz stereo 364 Dynamically mapped; 96 or greater 16-bit linear 11,025 Hz mono 182 Dynamically mapped; 96 or greater 16-bit linear 11,025 Hz stereo 364 Dynamically mapped; 96 or greater 16-bit linear 22,050 Hz mono 364 Dynamically mapped; 96 or greater 16-bit linear 22,050 Hz stereo 728 Dynamically mapped; 96 or greater Cisco IP/TV Broadcast Server User Guide OL-4407-01 A-3
  4. 4. Appendix A Live Capture and File Format Reference Live-Capture Parameters Table A-2 Audio Formats (continued) Bandwidth Format (kbps) RTP Payload 16-bit linear 44,100 Hz mono 728 11 16-bit linear 44,100 Hz stereo 1456 10 Table A-3 maps several Microsoft Audio Compression Manager (ACM) codec formats to the corresponding RTP audio payload types transmitted by IP/TV Server. Table A-3 Microsoft ACM Codecs Microsoft ACM Codec RTP Audio Payload Type MA ADPCM DVI4 Microsoft GSM 6.10 GSM CCITT mu-law PCM mu-law Live-Capture Parameters Table A-4 lists the preferred audio format, data rate, video frame rate, and compression of common codecs. These settings are configurable from IP/TV Program Manager. Also listed are the preferred source video format and video size, which are set locally on the capture device. Note These settings are recommendations. The actual frame rate varies depending on system resources and the video source. You may need to adjust the settings slightly for best performance in your environment. Cisco IP/TV Broadcast Server User Guide A-4 OL-4407-01
  5. 5. Appendix A Live Capture and File Format Reference Live-Capture Parameters Table A-4 Live-Capture Parameters Video Data Frame Source Rate Rate Video Source Codec Preferred Audio Format (kbps) (fps)1 Compression Format Video Size ISO MP3 8000 mono 72 15 — RGB 24 176 x 144 MPEG-42 MP3 11,025 stereo 530 30 — RGB 24 352 x 288 MP3 22,050 stereo 560 30 — RGB 24 352 x 288 AAC 22,050 stereo 88 15 — RGB 24 176 x 144 AAC, 32,000 stereo 522 30 — RGB 24 352 x 288 AAC, 44,100 stereo 540 30 — RGB 24 352 x 288 Microsoft Windows Media Audio 8000 28 10 — RGB 16 176 x 144 MPEG-4 Hz mono or MP3 8000 Hz or 243 or smaller mono Windows Media Audio 8000 56 15 — RGB 16 176 x 144 Hz mono or MP3 8000 Hz or 243 or smaller mono GSM 128 15 — RGB 16 320 x 240 or 243 DVI or PCM 256 15 — RGB 16 320 x 240 or 243 PCM or 8-bit linear, 11,025 512 30 — RGB 16 320 x 240 mono or 243 PCM or 8-bit linear, 11,025 768 30 — RGB 16 320 x 240 mono or 243 Cisco IP/TV Broadcast Server User Guide OL-4407-01 A-5
  6. 6. Appendix A Live Capture and File Format Reference Live-Capture Parameters Table A-4 Live-Capture Parameters (continued) Video Data Frame Source Rate Rate Video Source Codec Preferred Audio Format (kbps) (fps)1 Compression Format Video Size H.261 GSM (MBone-compatible) 128 10 7 YVU 9 or 176 x144 or RGB 15, smaller 16, or 243 DVI or PCM 256 15 8 YVU 9 or 176 x 144 RGB 15, or smaller 16, or 243 PCM or 8-bit linear, 11,025 512 30 8 YVU 9 or 176 x 144 Hz, mono RGB 15, or smaller 16, or 243 PCM or 8-bit linear, 11,025 768 30 8 YVU 9 or 320 x 240 Hz, mono RGB 15, 16, or 243 PCM or 8-bit linear, 11,025 1,000 30 8 YVU 9 or 320 x 240 Hz, mono RGB 15, 16, or 243 MPEG-1 MPEG 512 24 — — 352 x 2405 (64 kbps)4 MPEG 750 24 — — 352 x 2405 (64 kbps)4 MPEG 1000 30 — — 352 x x2405 (192 kbps)4 MPEG 1250 30 — — 352 x 2405 MPEG 1500 30 — — 352 x 2405 Cisco IP/TV Broadcast Server User Guide A-6 OL-4407-01
  7. 7. Appendix A Live Capture and File Format Reference File Formats Table A-4 Live-Capture Parameters (continued) Video Data Frame Source Rate Rate Video Source Codec Preferred Audio Format (kbps) (fps)1 Compression Format Video Size MPEG-2 MPEG 2000 30 — — 352 x 4805 Half D1 2500 3000 3500 MPEG-2 MPEG 3000 30 — — 704 x 4805 Full D1 3500 4000 4500 5000 5500 6000 1. fps = frames per second. 2. Minimum requirements for ISO MPEG-4 streaming and recording include a 1.6-GHz Pentium 4 processor, 512 MB of memory, and one PCI slot for the capture card. 3. Setting the video format to RGB 24 increases the data rate. 4. To configure the data rate of the MPEG audio format, you must locally reset the capture device. See the “MPEG-4 Capture Devices” section on page 3-26. 5. For NTSC video input only. If the video input is PAL, MPEG-1 will be 352 x 288, MPEG-2 Full D1 will be 704 x 576, and MPEG-2 Half D1 will be 352 x 576. File Formats In prerecorded file server mode, IP/TV Server reads from prerecorded media files and multicasts the audio and video streams over the network. Table A-5 lists and describes these file formats. Cisco IP/TV Broadcast Server User Guide OL-4407-01 A-7
  8. 8. Appendix A Live Capture and File Format Reference File Formats Table A-5 File Formats File Format Description 1 .asf The .asf version 1 format is a container for media streams. Basic .asf includes video, audio, the URL script type for web presentation, and marker information. .avi1 The .avi format can contain video compressed with any Video for Windows codec (such as H.261 Cinepak or Indeo). It can also contain audio compressed with any ACM codec. .dat The .dat format contains CD Interactive (CD-I) content, which can be video or audio. .mov The QuickTime Movie format or .mov file contains Cisco Streaming Engine streamable multimedia content. .mp3 The MP3 format contains audio-only content compressed in the MPEG audio Layer 3 codec. .mp4 IP/TV uses the MP4 format for recording ISO MPEG-4 video streams along with MP3 as well as AAC audio streams. These files may also store presentations in the form of URL or JPEG tracks. .mpg The .mpg format encompasses a family of compression technologies. MPEG-1 video produces high-quality CD-ROM video, whereas MPEG-2 video, at both half D1 and full D1 resolutions, produces higher-quality DVD video at high bit rates. MPEG audio layers 1 through 3 produce high-quality audio. Note that AC3 audio from Dolby is not currently supported. .rtp The .rtp format includes headers and timing information as well as RTP packet content. It was created by IP/TV to facilitate real-time delivery of audio, video, and SlideCast streams over IP networks. .wav The .wav format contains audio-only content compression in any ACM codec. 1. Video streams that require color tables or palettes are not supported. Cisco IP/TV Broadcast Server User Guide A-8 OL-4407-01
  9. 9. Appendix A Live Capture and File Format Reference Recording and Streaming Restrictions Recording and Streaming Restrictions Cisco IP/TV Release 5.1 supports three different file formats for recording: .mpg, .mp4, and .mov. Only .mp4 and .mov are supported for streaming over the Cisco Streaming Engine. Cisco IP/TV does not support remote recording of MPEG and MP4 files. You can use only MOV recording for remote recording. For Web Presenter programs, only MP4 recording is supported. Apart from these limitations, there are some restrictions related to file size and duration that you must observe while creating programs. Table A-6 shows the limitations of the different file formats supported by IP/TV. Table A-6 File Size and File Duration Restrictions File Format (Recorded by Maximum File Size Maximum File Duration IP/TV Server) (for Recording) (for Streaming) MP4 (.mp4) 2 GB Unlimited on IP/TV Server; not more than 6 hours 37 minutes on the Cisco Streaming Engine.1 MPEG (.mpg)2 4 GB3 Unlimited. 4 MOV (.mov) Unlimited Unlimited. 1. This restriction is applicable only for files created by Cisco IP/TV Server. 2. Cisco Streaming Engine does not support MPEG files for streaming. 3. This is the default size for MPEG files in Cisco IP/TV. For information on changing the file size, see the “Reserving Disk Space” section on page 4-7. 4. If your device is using a File Allocation Table (FAT) 32 file system, the maximum file size is limited to 4 GB. However, if you are using a Windows NT (NTFS) file system for your device, there is no limit on the maximum file size. Note The Cisco Streaming Engine does not support streaming of files larger than 2 GB. Cisco IP/TV Broadcast Server User Guide OL-4407-01 A-9
  10. 10. Appendix A Live Capture and File Format Reference Recording and Streaming Restrictions Cisco IP/TV Broadcast Server User Guide A-10 OL-4407-01

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