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From: | Ron Economos |
Subject: | Re: [Discuss-gnuradio] bit stuffing DVB-S TX example ? |
Date: | Thu, 7 Feb 2019 16:26:25 -0800 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 |
First, you have to match the TS rate to the symbol rate. The equation is: Symbol rate * 2 * 188/204 * code rate For the example flow graph: 8000000 * 2 * 188/204 * 7/8 = 12.901961 Mbps Second, you need to constrain the video bitrate to fit into the selected TS bitrate. With ffmpeg, something like this: ffmpeg -i test.mp4 -c:v libx264 -b:v 10M -minrate 11M -maxrate 11M -bufsize 8M -c:a copy -muxrate 12901961 test.ts For SD video, a smaller bufsize like 2M should be used. Ron On 2/7/19 15:15, Alban Meffre wrote:
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