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Mac OS error code -50 burning from EyeTV


sleepyduck

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Hi All

 

I'm having trouble burning a recording exported from EyeTV 2. The file exports fine to Toast (I'm using 7.1) and the progress bar goes all the way along during the "multiplexing" stage, but when it gets to the end I get the message that the operation can't be completed because of a Mac OS error code -50.

 

I'm using a MacBook with 2Gig of RAM, 10.4.7 and the most up to date versions of everything. I've tried restarting, repairing permissions, saving as a disk image, all with the same result. The odd thing is that I burned another recording a couple of days ago with no problems at all and I haven't changed a thing since then.

 

All suggestions welcome - and thanks in advance!

 

Paul

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Thank you very much. The discussion was very helpful. I have a problem with Eye TV 2.3.1 exporting. If I want to export a Program Stream of a let's say 720X576 MPEG at estimated size of 1.9.GB I will not get a 720x576 file of 1.9 GB as it says in the SAVE AS window, but a file with 720x440 with ca. 1.1 GB size and the quality of this file is rather degraded compared to the original EYE TV recording. Any ideas what that is all about? Thank you.

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I think this is an EyeTV bug, when I "edit" recordings to remove adverts and then "compact" about 20% lose their sound. If you transfer to Toast and check the "edit", have a look to see if it is "mono" or stereo" - the former is silent and the latter ok. If mono then simply go back to EyeTV and re-edit/recompact. EyeTV however blaim Toast which may/may not be the case.

I think the reason for the lack of sound is to do with the audio description soundtrack. The other week I burned a DVD of "Legally Blonde 2" direct from EyeTV which turned out to have the audio description soundtrack rather than the actual movie soundtrack on it (which was a little confusing, until I realised what was going on!) De-multiplexing the EyeTV programme using ProjectX revealed two separate mpeg audio tracks: the actual soundtrack which was stereo and the audio description track which was mono. Looking at other EyeTV programmes suggests that most/all Freeview broadcasts have this second, mono soundtrack but in the majority of cases it is silent. (Using MPEGStreamClip allows you to choose which soundtrack to listen to when you play the raw .mpg from EyeTV.)

 

Why it is sometimes the audio description soundtrack that gets picked up when you try to Toast the edited and compacted programme direct from EyeTV I don't know. However, using the EyeTV "Export for Toast" function does seem to get the right soundtrack every time. Re-editing and re-compacting doesn't always fix it, I've found.

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so I usually burn a disc image first, test that in the Apple DVD Player, and then re-burn to DVD.

 

First export to Toast from EyeTV, then choose "Save as Disk Image" under Toast's File Menu. You may need to double-click the image to mount it. Then launch DVD Player and open the files in the VideoTS folder. When you're happy that all is well, you can drag the image into Toast, open it from the File Menu, etc. Then burn as normal.

 

BTW, this is necsaary to burn files larger than 4.3 GB (on Dual Layer disks).

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I removed Toast 7.1 and put back 7.0.1 from the CD. I have now successfully burnt the EyeTV recording of "Rome, Open City" from FilmFour on to a DVD-R. I'm now going to try it with a DVD-RW.

 

So it's beginning to look like a Toast 7.1 bug, not a FilmFour copy protection issue.

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Are you trying to burn a standard DVD?

What happens if you use a different source file (example: a movie trailer from apple.com)?

 

Yep, I'm trying to burn a standard video DVD from a file exported from EyeTV using the "Toast" button. Everything seems to work fine with avi files - and I've just noticed that the problem only seems to be occurring with content from one particular TV channel. Content from a sample of other channels is fine. is it possible that there's some kind of copy protection on the signal on that one channel?

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Regarding yoru 3 playback issues, make sure the buffer underrun prevention is turned off during recording. My DVD player does all those things if it was used on a particular DVD.

 

Thanks for this suggestion but deselecting this option has no effect. Last night's broadcast of "Short Cuts" had an information content of 17 MB per min and, sure enough, it plays without the facility of fast forward. The menu button is also disabled on the Mac DVD Player.

 

It is significant that none of the low content transmissions have come from the BBC. It seems to be that the commercial channels are applying compression to some films but not others. I would like to know if other users can confirm or contradict my results. eyeTV seems to cope with compressed films successfully but Toast doesn't. Is this a shortcoming that can be correctd or is it a more fundamental problem?

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Having now had time to build some experience with eyeTV and Toast 7, I am able to draw some pragmatic conclusions. My eyeTV program is up to date and I am using Toast 7.0.2 as 7.1 (pre update) continually led to error -50 when multiplexing. Trying to transfer a feature film to a video DVD has produced, for me, 3 possible outcomes:

1. Complete Success. (24)

2. Film can be watched but will not fast forward and crashes DVD Player if I attempt to step through the

chapters. (3)

3. DVD Player crashes early on playback, usually during the credits. (9)

I noticed that the films in category 1 all had file sizes of at least 2GB and frequently much more. This suggested that the problems arises from excessive compression of the transmission. Obviously the file size is also related to playing time so I adopted an index calculated by dividing the file size in MBytes by the playing time in mins. If this figure is at least 24 I can be very confident of success. Most of the complete failures are in the range 18 to 20. The 3 films in the second category, surprisingly, have indexes of 16,17,17. I have no explanation for that. I find that all films made specifically for TV, such as Poirot, West Wing , Maigret and Desperate Housewives, give no problems and that they typically have indexes of 24/25.

 

Perhaps someone or knows about compresssed TV transmission could comment.

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Grr! I've just spent more than half a fine sunny day trying to work out why the 'Mac OS error result code=-50' message kept appearing when trying to burn a Film 4 offering to DVD, so it's been very useful discovering that it is a persistent problem for others. Thanks everyone for the postings. Maybe someone should tell Roxann! On one of my many tests I used a Film 4 advert, only to find that it suffered in just the same way; and it was only subsequently, when employing some footage from a BBC 1 outside broadcast that I began to realise that the problem was probably localised.

 

The only other problem I have ever encountered in trying to burn a broadcast TV programme to DVD with Toast 7.1 was with a Channel 4 programme recently. No audio was present on playback. Annoying, but on that occasion I didn't care enough to begin tearing out my hair . . . However, it's good to have an explanation and the knowledge of how it might be overcome in the future. So thanks.

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OK, here's an update on what I've found out about this issue.

 

According to information on this thread on Digital Spy, Film 4 is broadcast using a non-standard GOP. If the GOP is over 15 then that contravenes the standard for PAL format DVDs. The guess is that it is this which is causing problems with Toast (failure to burn with 7.1, bad video with 7.0.1).

 

The solution would be to get Toast to re-encode the video before burning it to DVD. The workaround found by marmot makes this happen, by presenting Toast with separate video and audio streams which have to be re-encoded before they can be burned (that's why his disc burn took two hours). However, it looks like there is an easier way to do this which doesn't involve creating any intermediate files. Unfortunately I don't have the application in front of me right now, but from memory the procedure is:

  • In the "Format" window, select "Custom" and click the "More" button.
  • A window will appear over the top of the main window, offering you options to rename the disc etc.
  • Select the other tab on that window (I think it's called "Encoding" or something like that).
  • There's lots of options on that window but IIRC the one you want is called "Encoding". Select "Always" from the drop-down list, leave the other options as they are and click the "Done" button.

This should force Toast to re-encode the video stream with DVD-standard-compliant GOP.

 

The downside is that the re-encoding often results in a video which is too large to fit on a DVD. This is what happened with me when I tried it with my recording of "Rome, Open City". That's about an hour and forty minutes long. I'd normally expect that to fit on a DVD with a wee bit to spare. If I burned it direct from EyeTV it only half-filled the disc. This makes sense if it has a large, non-standard GOP (which reduces the bandwidth required to transmit the programme - apparently Film 4 is somewhat bandwidth-challenged and they do this in order to try to maintain picture quality). Re-encoding to meet the DVD standard increases the size of the recording, and in the case of this film it went over the DVD size limit. The answer to this, of course, is to tell Toast to save its DVD image to disc, and then use Toast to compress it to fit a normal DVD. This also is a time-consuming process, but you get there in the end.

 

So in summary: it's not Toast's fault, and there is a way to fix it which isn't too fiddly and which doesn't use huge amounts of extra disc (unless the initial DVD image is too big). It is, however, time-consuming.

 

If anyone knows a way to adjust Toast's burning parameters to fit the recording on the DVD in one pass, could they please pass it on? (I suspect the solution may lie with one or more of the other options on that "Encoding" window but I'd appreciate confirmation of that, otherwise I may have to waste even more time experimenting!)

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I have followed this discussion with great interest and, having replaced Toast 7.1 with 7.0.2, have not encountered the Mac OS Error -50 again. However, I am now finding that many films finish up in the disc image with no sound track. Has anyone else got this problem? It did happen once with 7.1. I am not interested in playing DVDs other than with the Mac DVD Player.

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Yep, I'm trying to burn a standard video DVD from a file exported from EyeTV using the "Toast" button. Everything seems to work fine with avi files - and I've just noticed that the problem only seems to be occurring with content from one particular TV channel. Content from a sample of other channels is fine. is it possible that there's some kind of copy protection on the signal on that one channel?

 

I am having exactely the same problem. Are we talking about filmfour?

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Glad I came back and checked before trying the longer workaround. Have also just gone back to 7.0.1 and it seems to be working. Fingers crossed. Thanks. Glad FilmFour seems to be blameless - though why is it only their channel that appears to be causing problems? Thanks. :)

 

Have you checked that you can play the DVDs yet? I've found that, although Toast doesn't give an error and seems to burn the disc successfully, the video won't play in my DVD recorder, or using VLC on the Mac. I get the menu, but when I select the video I get a few seconds of blank screen and then back to the menu. It's almost as if the video is zero length. (Elgato support have told me that they have seen the -50 error with zero length videos.)

 

I tried burning another short recording from Film 4. This time the videoplays from the top level menu on the DVD, but it skips and freezes (and crashes the playback window in VLC).

 

This does seem to be a problem only with Film 4. Elgato support said it might be due to signal dropout during the recording but it seems to play fine from the EyeTV playlist. I wonder if it's anythign to do with the edits I did to the recording before trying to burn it? But then I didn't make any edits to the second, shorter recording - but then the behaviour is different with that recording.

 

I'm beginning to resign myself to not being able to use Toast for Film 4 recordings (I tried the workaround suggested by marmot. It was still doing the burn when I left for work this morning so even if I do get a usable DVD, it will have taken a devil of a long time to get there.)

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ejstubbs suggested...

 

[*]In the "Format" window, select "Custom" and click the "More" button.

[*]A window will appear over the top of the main window, offering you options to rename the disc etc.

[*]Select the other tab on that window (I think it's called "Encoding" or something like that).

[*]There's lots of options on that window but IIRC the one you want is called "Encoding". Select "Always" from the drop-down list, leave the other options as they are and click the "Done" button.

This should force Toast to re-encode the video stream with DVD-standard-compliant GOP.

 

The downside is that the re-encoding often results in a video which is too large to fit on a DVD.

 

...I did this and here are some observations. When you select "always encode" the space required doubles. For a standard feature film it exceeds the 4.3gb that you get on a DVD. If you reduce the average bit rate and the maximum bit rate you can make it small enough to get it on to a DVD. The alternative is to "save as disk image" from Toast's file menu and Toast then produces a re-encoded disk image in your documents folder. You then mount the disk image, open the folder and drag and drop the VT folder into Toast. It then requires about half as much space as the original.

 

The problem is that, whether you go for the reduced bit rates or the route via the disk image and maximum bit rates, the result is full of dropouts that are so gross as to make the film unwatchable.

 

Anyone got any ideas?

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Hii,, You are getting the Mac OS error 50 because the files are not copying from in location to another. This can happen if the files are corrupted. You can fix the error issue if you can get the backup copy of the corrupted file from the time machine or any other source. If the backup is not available then you can get help from the given location : http://www.macfixz.com/how-to-fix-error-mac-code-50-get-corrupted-deleted-mac-data-recovered

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I removed Toast 7.1 and put back 7.0.1 from the CD. I have now successfully burnt the EyeTV recording of "Rome, Open City" from FilmFour on to a DVD-R. I'm now going to try it with a DVD-RW.

 

So it's beginning to look like a Toast 7.1 bug, not a FilmFour copy protection issue.

 

 

Glad I came back and checked before trying the longer workaround. Have also just gone back to 7.0.1 and it seems to be working. Fingers crossed. Thanks. Glad FilmFour seems to be blameless - though why is it only their channel that appears to be causing problems? Thanks. :)

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...I did this and here are some observations. When you select "always encode" the space required doubles. For a standard feature film it exceeds the 4.3gb that you get on a DVD. If you reduce the average bit rate and the maximum bit rate you can make it small enough to get it on to a DVD. The alternative is to "save as disk image" from Toast's file menu and Toast then produces a re-encoded disk image in your documents folder. You then mount the disk image, open the folder and drag and drop the VT folder into Toast. It then requires about half as much space as the original.

 

The problem is that, whether you go for the reduced bit rates or the route via the disk image and maximum bit rates, the result is full of dropouts that are so gross as to make the film unwatchable.

 

Anyone got any ideas?

I have experienced the dropouts problem and reported it to Elgato, who claimed to be working the problem with Roxio. (I've never had any useful feedback reporting problems to Roxio themselves.) The only way around it I've found so far is to open the MPEG program stream with MPEGStreamView and export it as a new MPEG file after fixing timecode breaks etc. I then burn the resulting MPEG file with Toast, adjusting bit rates etc as you describe to make it fit on a single disc. Having to do this suggests to me that there is an issue with the quality of the MPEG program stream captured by EyeTV (though to be fair to Elgato that might be down to problems with the broadcast signal quality or the aerial/downlead - as far as I know the MPEG program stream is recorded as-is, with no further processing by EyeTV).

 

The above is a long-winded process and still isn't guaranteed to work so I usually burn a disc image first, test that in the Apple DVD Player, and then re-burn to DVD. I only have to do this with Film4 content, and I'm convinced it's because of the non-standard GOP they use. I have noticed that Film4+1 uses a maximum GOP of 12, but the picture quality on that channel is worse than Film4 because they use an even lower bit rate for Film4+1. I don't recall seeing the -50 problem with recordings from any other channel (although I do tend to stick to the mainstream channels ie BBC, ITV, Channel 4 and Five).

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OK, so I've now managed to burn the movie to DVD-R and to DVD-RW. I've also created a Toast disc image, and burned that to DVD-RW without problem. So it looks to me like the -50 error is definitely to do with Toast 7.1, not recordings from FilmFour per se (although it might be something to do with FilmFour that triggers the problem).

 

I have not yet managed to get any of the DVDs to play on my DVD recorder, but that's another issue. Only the one burned to DVD-R plays OK on the Mac; the ones burned to DVD-RW get "Supported disc not available" when I press play on the Mac DVD player. Similarly, DVD-RWs burned on the DVD recorder don't play on the Mac, although Toast does list the content. If, however, I mount the disc image created by Toast then the Mac DVD player plays that fine. Is it the case that the Mac DVD player just can't play DVD-RWs? (Edit: It appears that may be the case, see this article on the Apple support web site.)

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Interesting that you get the problem with streams recorded by the Toppy. That does seem to rule out EyeTV as the problem.

 

Sizzle is not a better option for me. For one thing, I've not found it to create usable DVDs very reliably and I got a lot of "coasters". Also, it's not much quicker, if at all: I still have to export the programme from EyeTV in mpeg format, which takes a while, then Sizzle takes a long time to do its thing. And finally, it has a nasty habit of crashing for no readily apparent reason half way through doing its thing. That's why I eventually bowed to what seemed to be inevitable and got Toast.

 

Using Toast, I have found that if I adjust the Maximum Bit Rate in the Encoding options, I can get a burn which fits on a single DVD-RW without having to go via a disc image. The coloured quadrant round the burn button on the main Toast window tells you whether the burn options have selected will fit on the available media. An MBR of around 5.5Mbps seems to fit a 2-hour movie on to one disc OK.

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