Hi All -
So, I need to deliver some mpeg files for VOD programming and was sent a spec sheet - which I looked at and went "huh?" Need some help decoding the encoding sheet...
I'm using Compressor, which has a preset for mpeg2 transport stream. But looking at the spec guidelines below, I have a few questions.
1 - do I have to crop the frame to one of the listed resolutions? if so, I don't get it...
2 - how do I know if the transport stream is "starting on a packet boundry?"
3 - does base data rate mean the max rate?
4 - under the "video" spec - these are all inherent in the mpeg spec, correct?
thanks for any input
Standard Definition VOD Encoding Specification
Video:
• MPEG-2, Main level, main profile
• 4:3 or 16x9
• 4:2:0 chroma subsampling
• Frame rate of 29.97 for video and 23.97 for film
• Black Level at 0 IRE
• 5 seconds of black at start of clip and 1 second of black at the end of clip
• Video data rate of no greater than 3.18Mbps
• Stream Type 0x02
• Stream ID 0xe0
• PID 0x1e1 (481)
Audio:
• 2-channel Dolby AC-3 at 192kbps
• Sampling Rate 48000sps
• Stream Type 0x81
• Stream ID 0xBD
• PID 0x1e2 (482)
Bit rate:
• Single program transport stream with a base data rate of 3.75Mbps or less
• Constant Bit Rate
Resolution:
• 3⁄4 resolution (528x480)
• or 1⁄2 resolution (352x480)
Transport Stream:
• Single continuous transport stream, single program
• Transport stream must start on a packet boundary
• Program Number 0x001 (1)
• PMT PID 0x1e0 (480)
• PCR PID 0x1e1 (481) must be carried in the videoBase
So, I need to deliver some mpeg files for VOD programming and was sent a spec sheet - which I looked at and went "huh?" Need some help decoding the encoding sheet...
I'm using Compressor, which has a preset for mpeg2 transport stream. But looking at the spec guidelines below, I have a few questions.
1 - do I have to crop the frame to one of the listed resolutions? if so, I don't get it...
2 - how do I know if the transport stream is "starting on a packet boundry?"
3 - does base data rate mean the max rate?
4 - under the "video" spec - these are all inherent in the mpeg spec, correct?
thanks for any input
Standard Definition VOD Encoding Specification
Video:
• MPEG-2, Main level, main profile
• 4:3 or 16x9
• 4:2:0 chroma subsampling
• Frame rate of 29.97 for video and 23.97 for film
• Black Level at 0 IRE
• 5 seconds of black at start of clip and 1 second of black at the end of clip
• Video data rate of no greater than 3.18Mbps
• Stream Type 0x02
• Stream ID 0xe0
• PID 0x1e1 (481)
Audio:
• 2-channel Dolby AC-3 at 192kbps
• Sampling Rate 48000sps
• Stream Type 0x81
• Stream ID 0xBD
• PID 0x1e2 (482)
Bit rate:
• Single program transport stream with a base data rate of 3.75Mbps or less
• Constant Bit Rate
Resolution:
• 3⁄4 resolution (528x480)
• or 1⁄2 resolution (352x480)
Transport Stream:
• Single continuous transport stream, single program
• Transport stream must start on a packet boundary
• Program Number 0x001 (1)
• PMT PID 0x1e0 (480)
• PCR PID 0x1e1 (481) must be carried in the videoBase