> NAQs & FAQs

> For those following the 'spirit' of Project X, who want to learn more about this topic, we provide some loosely coupled thoughts and tips which might be useful.

> Further problems can only be solved if they are discussed in the forum. Otherwise they might never be solved.
> The overwhelming presents of different hard- and software for DVB recording might require settings which are different from the standard in Project X.

> 1.) I'm deaf and I want to transfer the teletext-subtitles from a recorded broadcasting to a DVD.

> Preconditions:
> 1) Subtitles are transmitted via teletext. (e.g. page 149, 150, 888, ...)
> 2) The recording software must be capable to capture the Video-/Audio- and Teletext stream without a change to one ore several files.
> 3) The broadcasting company transmits the timestamps to synchronize the texts with the picture. Not all of them are doing this or not correctly!
> 4) A DVD-Authoring application which is supporting subtitle formats.

> Walk through:
> 1) record the broadcast.
> 2) load the file as one collection into Project X, where one or more teletext files are given at the end.
> 3) choose in the tab {teletext}the page(s) with the subtitles you want (max. 6).
> Additionally you have to choose the output format according to your authoring application.
> 4) if necessary: set cut-point via {collection specials} and set additional options.
> 5) choose {demux} in the main window and push {Go}.
> 6) author your new DVD with the created files.

> Hint:
> The easiest and best way for this purpose is the following processing chain: record -> Project X -> ifoedit -> DVD.
> The missing start menu is not important.

> before you start you have to set some properties and to check the result:
> 1) choose the format {SUP} in the tab {teletext} in Project X. Activate {show preview} and choose a {Text font}.
> 2) start the process according the the steps given above.
> 3) you have to check if the chosen font in the {subtitle preview} is as you like and if the text fills the black background but not doesn't exceeds the borders. You have to adjust the special SUP-values according to the Project X documentation.
> + take into consideration that the position of the subtitles within the picture depends on the resolution of the picture file. The default values fit the common D1 standard of 720*576.
> 4) in ifoedit you have to load the video file, audio file, subtitle-file ( xyz[X].sup ) and optionally a chapter file and finally compile this with {ok} to a DVD file structure.
> 5) the created .IFO-files have default color values for menus and subtitles. These have to be adjusted to the teletext colors.
> + additionally to the created .IFOs you have to load a COLORS.IFO (if existing) with the 'new' colors. In the menu VTS_PGCITI choose the entry VTS_PGC_1 and in the ifoedit-menu the entry {subtitle colors} {copy colors..}, otherwise you have to set all color-values manually.
> + you have to choose the same entry in the new VTS_xx_0.IFO, but instead of {copy...} choose {paste colors...}! These changes have to be saved in this .IFO.
> 6) the created title set has to be burned on a -RW and tested with your standalone DVD-player.

> <>Particularities:
> 1) the SUP and the SSA format take the text colors as far as possible from the teletext. There are only 4 colors valid In the SUP format for each occurance (mostly half-transparent text-background included), this might cause differences in the result. From the V.081.6 int10 onwards fonts, which are not provided with a black background are displayed in Italic (if supported by the font) to state the difference.
> 2) Synchronization: (see Preconditions 3)
> + the results are (very) differently dependent on the station and page
> + because of missing data it's impossible for the stations: Kabel1, NDR, ...
> Comment: the teletext output was reworked in V.081.7 and should be as synchrony as the live output (including cuts) provided that correct insertions are made into the appropriate DPC's.
> 3) please take into account the subtitles are protected by copyright.

> 2.) I have a 2 audio channel record from e.g. Worldnet, a audio description e.g. from 3sat or a recording where only 1 channel is of interest and want to separate the channels.

> Therefor we have the tab {audio} and the option {2channel to 2*single}.
> This works only with the output format: MPEG-1 Audio Layer2 48kHz between 112...384kbps.
> The bitrate in the new 1 channel files is kept as low but as constant as possible.
> This can be done with all jobs which check a MPEG audio file.
> If the target bitrate exceeds valid values the file format is automatically transformed to stereo.

> 3.) I have a recording which changes (many times) between different bitrates and/or mono/stereo. The program crashes during processing or the result sounds like "Mickey Mouse".

> Therefor we have the tab {audio} and the option {single to ....}.
> If you want a stereo file you have to chose the option {single to jointstereo} or {single to jointstereo}.
> With these options the mono parts are transformed to (2 times mono). The output file is then created with a constant bitrate over the full length (if necessary also the stereo parts).
> This works only with the output format: MPEG-1 Audio Layer2 48kHz between 56...192kbps.
> This can be done with all jobs which check a MPEG audio file.

> If a mono-file is sufficient you can chose the option {2channel to 2*single}.
> Mono parts are copied directly and the bitrate is adjusted if necessary. 2 channel parts are transformed as described.

> If the recording contains non supported frames the whole transformation is not performed.
> Instead this can be achieved via transformation to PCM.

> 4.) I have a (S)VCD with a lot of errors

> Project X is made for DVB data primarily.
> (S)VCD contains MPEG data, but in a special CD-XA container especially made for portable media. These must be extracted before.
> You might have to deactivate the {get only enclosed PES packs..} option in {specials2}.
> (S)VCDs according to the jap./amerik. standard are not yet supported.

> 5.) I have a PVA-Recording with a lot of audio errors (inserts) in the 'mainstream'. I don't recognize errors during play.

> Your have to activate the {strictly PVA specs for Audio..} option in {specials2}.
> If there can't be found any audio stream the recording application created a non-standard PVA audio stream.
> If the errors occour with activated option then the recording application produces a non-standard PVA audio stream but this can be worked around with deactivating this option.

> 6.) I have a PVA-Recording with several audio stream with a lot of error (inserts). But only in the additional stream the main audio stream is o.k.

> First click {i} in the main window.
> Then you have to choose one ID after the other (of the additional streams) and save them in a new file.
> Then add these new files to the collection and start the job again.
> The additional audio stream in the PVA file should be deselected before processing.

> 7.) I have a TS-Recording where the job stops with the message "PID scrambled, ignored", but this recording is not scrambled.

> Deactivate {ignore scrambled TS packets} in {specials1}. X looks anyway for unscrambled packets for processing.

> If the message "PID xyz (payload ...) -> ignored" is given while parsing an expected PID, you have to enter these and any other PIDs you want in the {PIDlist} in {collection specials}. Then X is searching these PIDs for usable data.
> Even if the TS-Pakets contain scrambled data from time to time, but the pakets are not marked as "scrambled", the search doesn't ignore these pakets until well known startcodes are recoknized which cause a stop.

> 8.) I have a radio recording which has disturbances. While demuxing these parts are filled with silence or something like that for synchronization. Can this behavior be disabled?

> Activate the option {take only 1st audio PTS...} in {specials2}. Then these parts are ignored without further compensation.

> ...