Fast-forwarding screwy?

Discussion in 'TiVo Help Center' started by natallica, May 6, 2005.

  1. thenightfly42

    thenightfly42 Señor Senior, Jr.

    838
    7
    Mar 5, 2002
    Connecticut

    Advertisements

    Check out this thread for tracking down the symptoms; I think I figured it out there. Also, from my PMs with TivoJerry, I understand that TiVo Engineering has a unit in-house that has this bug. Whether or not it turns into a fix, we will have to see.
     
  2. NotVeryWitty

    NotVeryWitty Too Big to Fail

    906
    51
    Oct 3, 2003
    Central Mass.
    I'm still seeing this issue, too. Two or three times this last week, I was watching something on the Olympics a couple hours behind real time. Went to 2xFF through a commercial, and suddenly the Tivo has skipped ahead about 10 minutes and a new sport is on.

    Very frustrating that this bug still hasn't been fixed. :mad:
     
  3. sghogan

    sghogan New Member

    75
    0
    Mar 21, 2002
    I believe that this problem is occurring more often for me. Happens when watching live TV , behind in the buffer.
     
  4. zaoliyik

    zaoliyik New Member

    30
    0
    Mar 5, 2006

    I use my tivo to record history channel's documantary all the time, when this happen, it really sucks, you learn that such and such actually win the war without seeing the whole show.
     
  5. TiVoJerry

    TiVoJerry Caavo employee (Ex-TiVo, '00-'16)

    1,555
    37
    Jul 26, 2005
    Woodside, CA

    Advertisements

    I'm sorry to say that there is not yet a fix for this. We have been following this issue for some time and the investigation is still ongoing. I've even worked directly with several forum members in order to understand the problem better. Unfortunately, the issue is impossible to reproduce at will and does not seem to generate useful log entries, making this extremely difficult to diagnose.

    My personal understanding is that this mostly happens while FF'ing through a program that is still being recorded, which explains why many of the examples I've been given are of sporting events. It may also be the case that it happens during playback of a previously recorded program while another recording is in progress, but that has been even harder to determine at this point.

    Has anyone here been able to reproduce this at will?
     
  6. thenightfly42

    thenightfly42 Señor Senior, Jr.

    838
    7
    Mar 5, 2002
    Connecticut
    Did the first post in this thread make any sense or not work for you? It worked for me. I could try it again, see if it holds true with the software upgrade (I'm on 7.2.1, requested the update yesterday).
     
  7. TiVoJerry

    TiVoJerry Caavo employee (Ex-TiVo, '00-'16)

    1,555
    37
    Jul 26, 2005
    Woodside, CA
    I was unaware of that thread. If you could test it again to make sure it holds up, I'll add it to the report. Thank you.
     
  8. NotVeryWitty

    NotVeryWitty Too Big to Fail

    906
    51
    Oct 3, 2003
    Central Mass.
    Jerry,

    I'm one of the people this is happening to a lot. I cannot make the problem happen "at will", but I *almost always* see it at least once if I'm watching a sporting event that was set to record for at least 3 hours, and I start watching it some amount of time (like maybe a half hour or more) behind the record point.

    I am absolutely convinced that a necessary condition to have this problem happen is to watch a show that is still being recorded. I have only seen it happen while doing a 2xFF, but I almost never do 3xFF, so I don't know if it happens then or not. I would guess I've hit this problem at least 50 times over the last year.

    I believe it does *not* happen when watching a prerecorded show while recording a *different* show. Very often, I'm recording something new while watching an older show, and I have *never* encountered this problem in this environment.

    The other thing I am sure of is that the amount it skips ahead is not a fixed amount -- I have seen some skips of 8 minutes, and others about 15 minutes. Once, I was watching the "progress bar" at the bottom of the screen while doing 2xFF, and I saw it jump from 30 minutes to 38 minutes.

    It happens on both of my 240-series boxes, one is 80 GB and the other is 140 GB (both unmodified). I usually record at medium quality.

    If I can help in any way, please let me know.
     
  9. natallica

    natallica Member

    83
    1
    Jan 10, 2005
    Fairfax, VA
    Not here. It happens all the time w/pre-recorded shows...

    Doing a 2xFF, usually skips 10 min...

    -- N
     
  10. NotVeryWitty

    NotVeryWitty Too Big to Fail

    906
    51
    Oct 3, 2003
    Central Mass.
    Here is my current list of threads. I don't know if it's a coincidence or not, but I could not find any mention of this problem before January 2005, so I wonder if the bug was introduced as part of the 7.0 release...

    http://www.tivocommunity.com/tivo-vb/showthread.php?t=238582

    http://www.tivocommunity.com/tivo-vb/showthread.php?t=218903

    http://www.tivocommunity.com/tivo-vb/showthread.php?t=237522

    http://www.tivocommunity.com/tivo-vb/showthread.php?t=228910

    http://www.tivocommunity.com/tivo-vb/showthread.php?p=3502153
     
  11. thenightfly42

    thenightfly42 Señor Senior, Jr.

    838
    7
    Mar 5, 2002
    Connecticut
    I just hit one on Wednesday accidentally (I wasn't going to do the test until this weekend).

    Watching Lost, padded by 2 minutes on both ends. At the moment that the recording ended (I think that makes it 10:05 EST, IIRC Lost was an extra minute), my fastforward indicator hit the 0:30 mark, and it jumped ahead. (Note that there is no TiVo sound effect registring the jump; it just happens.)

    Everything from this point forward has been rectallly extracted by yours truly:

    I believe that there is something in the fastforward code that is confused by the tick marks in the display code. Perhaps the "make the green line X% of the total bar" code is referenced at the wrong time, and the calculation of "display this frame next" comes up with the wrong result?
     
  12. mhalver

    mhalver New Member

    189
    0
    Nov 3, 2005
    Still seeing this here, and quite often recently (2 or three times a show for the last few days).

    It usually happens when I am watching something previously recorded with nothing else actually recording.

    It seems to occur more often if there is a lot of stuff recorded. If I delete till my tivo is almost empty, it is less likely to happen. Maybe it has something to do with the drive being fragmented?
     
  13. dcahoe

    dcahoe TiVoPlayList Author

    375
    0
    Jan 28, 2006
    Louisville, KY
    I have noted with TiVoPlayList that TiVo pre-allocates a chunk of disk space as it records a show and then as it fills this chunk it pre-allocates another chunk until it fills it and so forth...

    I believe that what may be happening is that when people are watching a show that is currently being recorded AND they are fast-forwarding when this new 'chunk' is allocated, their current position skips ahead by the same amount as the newly allocated 'chunk' of space.
     
  14. mhalver

    mhalver New Member

    189
    0
    Nov 3, 2005
    That makes since, but I almost never see it when something is recording. Almost always when the tivo is not recording anything and I am watching a pre-recorded program. Maybe less than 10% of the occurances are when it is recording.

    I don't know what sort of disk maintanance the TiVo does, but could this have something to do with the disk becoming fragmented? It seems more likely to happen when I have a lot of stuff saved, and others have noted the same phenomenon.
     
  15. mhalver

    mhalver New Member

    189
    0
    Nov 3, 2005
    Has there been any further progress made on figuring this out?
     
  16. smith1190

    smith1190 New Member

    29
    0
    Dec 19, 2004
    Chicago, IL
    I don't know if this helps, but this used to happen to me when I activated the feature that quickly clears the green bar (blanking on the term). I liked having it disappear quickly when I'm watching sports so it doesn't obscure any action or stats. As long as I keep that "hidden" feature off, it never happens - for months now it's never happened again. And I found that hitting Play again clears the green bar anyway, so I've just stopped using it. If anyone knows that's been resolved, please let me know so I can try it again. Thanks.
     
  17. NotVeryWitty

    NotVeryWitty Too Big to Fail

    906
    51
    Oct 3, 2003
    Central Mass.
    I have never had this feature enabled, but see the problem frequently (when watching a ball game that's still being recorded).
     
  18. mhalver

    mhalver New Member

    189
    0
    Nov 3, 2005
    Yes, a lot of people seem to experience it and it seems to be different in most cases on what causes it. I hope they do manage to fix it soon. It is very annoying, but at least it isn't catastrophic like the random reboot problem.
     
  19. thenightfly42

    thenightfly42 Señor Senior, Jr.

    838
    7
    Mar 5, 2002
    Connecticut
    Has anyone tested this under the new 7.3 software release? I seem to be at the end of every software release, so I haven't had the chance yet.
     

Share This Page

spam firewall

Advertisements