On Sat, 9 Oct 2010, Devin Heitmueller wrote: > On Sat, Oct 9, 2010 at 12:31 AM, Paul Walmsley <paul@xxxxxxxxxxx> 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@xxxxxxxxxxxxxxx/msg13869.html It wouldn't surprise me if many people discovered this issue since 2006. Thanks for the link, - Paul
