Delete commercials keeping the right timing of the subtitles on a MPEG TS?

[edea]

I'd like to convert the MPEG TS files recorded with an USB TV card, using Me-TV program, to a more common format (AVI).

I'd like to keep all streams (all audios and all subtitles), but if I first demux all streams and convert the video+audio tracks to AVI, and then I delete the commercials, I'll have to manually resync the subtitles

Is there any way to delete first the commercials from a MPEG TS file so that the timing of the subtitles remain correct?

Thanks in advance.

[netmask56]

Not sure what country you are in - this is important to know as MPEG TS files can be different depending on transmission standards.
Or post a mediaInfo log of a typical file ( text tree)
If the video is MPEG2 and NOT H264 you can use ProjectX in Demux mode and edit out commercials using the time line editor, then when you hit demux it produces an audio file a video file and a subtitle file all in sync.

[edea]

Thanks for answering.

ProjectX is what I use to demux the files, but I didn't know it had an editor. I am taking a look into it, but I can't find it. Where is it and how do I delete the commercials exactly?

It is MPEG2:

General
ID                               : 187 (0xBB)
Complete name                    : Z:\media\Datos\TDT\test.mpeg
Format                           : MPEG-TS
File size                        : 70.1 MiB
Duration                         : 4mn 17s
Overall bit rate mode            : Variable
Overall bit rate                 : 2 284 Kbps

Video
ID                               : 1101 (0x44D)
Menu ID                          : 1000 (0x3E8)
Format                           : MPEG Video
Format version                   : Version 2
Format profile                   : Main@Main
Format settings, BVOP            : Yes
Format settings, Matrix          : Custom
Format settings, GOP             : M=3, N=21
Codec ID                         : 2
Duration                         : 4mn 16s
Bit rate mode                    : Variable
Bit rate                         : 1 977 Kbps
Maximum bit rate                 : 15.0 Mbps
Width                            : 704 pixels
Height                           : 576 pixels
Display aspect ratio             : 16:9
Active Format Description        : Full frame 16:9 image
Frame rate                       : 25.000 fps
Standard                         : PAL
Color space                      : YUV
Chroma subsampling               : 4:2:0
Bit depth                        : 8 bits
Scan type                        : Interlaced
Scan order                       : Top Field First
Compression mode                 : Lossy
Bits/(Pixel*Frame)               : 0.195
Stream size                      : 60.5 MiB (86%)

Audio #1
ID                               : 1103 (0x44F)
Menu ID                          : 1000 (0x3E8)
Format                           : MPEG Audio
Format version                   : Version 1
Format profile                   : Layer 2
Codec ID                         : 3
Duration                         : 4mn 17s
Bit rate mode                    : Constant
Bit rate                         : 128 Kbps
Channel(s)                       : 2 channels
Sampling rate                    : 48.0 KHz
Compression mode                 : Lossy
Delay relative to video          : -364ms
Stream size                      : 3.93 MiB (6%)
Language                         : Spanish

Audio #2
ID                               : 1104 (0x450)
Menu ID                          : 1000 (0x3E8)
Format                           : MPEG Audio
Format version                   : Version 1
Format profile                   : Layer 2
Codec ID                         : 3
Duration                         : 4mn 17s
Bit rate mode                    : Constant
Bit rate                         : 64.0 Kbps
Channel(s)                       : 1 channel
Sampling rate                    : 48.0 KHz
Compression mode                 : Lossy
Delay relative to video          : -364ms
Stream size                      : 1.96 MiB (3%)
Language                         : v.o

Text
ID                               : 1111 (0x457)
Menu ID                          : 1000 (0x3E8)
Format                           : DVB Subtitle
Codec ID                         : 6
Duration                         : 4mn 3s
Delay relative to video          : 5s 296ms
Language                         : Spanish

[edDV]

Usually if you cut transport streams at I frames (1/2 sec, 12 frame GOP usually for DVB), audio will maintain sync. This should be true for subtitles but I'm not sure.

But your info shows a 21 frame GOP so I frames will be separated by 21/25 = 0.84 sec

Format settings, GOP : M=3, N=21

[netmask56]

Edea, Take a look at my Wiki on ProjectX although I haven't updated the images for the latest version it's only cosmetic the changes. When you open ProjectX there is a large preview pane and below that there are transport controls. You scroll to where you want to start your video and insert a cut point - the timeline turns red to the left of the cut point. Then scroll to the start of the first commercial and insert another cut point this time the time line to the right will turn red scroll to the end of the commercial and insert a cut point the time line to the right turns green leaving the commercial portion red. Basically it edits the same way as VideoRedo and many other simple editors. If you are using the latest version of PX then after loading the file you need to click on the cut control tab at the bottom of the screen (there are 3 tabs) You can now get near frame accurate cuts with the fine control navigation tool.