On Sat, Oct 9, 2010 at 12:31 AM, Paul Walmsley <p...@booyaka.com> wrote: > > When digitizing composite video from a analog videotape source using the > TVP5150's first composite input channel, the captured stream exhibits > tearing and synchronization problems[1]. > > It turns out that commit c0477ad9feca01bd8eff95d7482c33753d05c700 caused > "TV mode" (as opposed to "VCR mode" or "auto-detect") to be forcibly > enabled for both composite inputs. According to the chip > documentation[2], "TV mode" disables a "chrominance trap" input filter, > which appears to be necessary for high-quality video capture from an > analog videotape source. [ Commit > c7c0b34c27bbf0671807e902fbfea6270c8f138d subsequently restricted the > problem to the first composite input, apparently inadvertently. ]
FYI: This isn't a newly discovered issue: http://www.mail-archive.com/linux-media@vger.kernel.org/msg13869.html Cheers, Devin -- Devin J. Heitmueller - Kernel Labs http://www.kernellabs.com -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
