File Conversion MP4/MKV like to MPG via ffmpeg - need HELP

[puck64]

Hi All,

I need a little help converting an avc/aac ts file to mpeg/ac3 ts file.

Notice I am only extracting 2 minutes of video starting at 1 minute from the start.

The code I'm trying to use is ...
ffmpeg -t 00:02:00.000 -ss 00:01:00.000 -i %1 -vcodec mpeg2video -aspect 16:9 -profile:v 4 -level:v 6 -b:v 15000k -bufsize 25000k -maxrate 25000k -vf "scale=1920:1080,yadif=0:-1" -acodec ac3 -ab 448k -ar 48000 -ac 2 -f mpegts -y "%~n1.ts"

When I try and open it in VideoRedo 3 I get the following error message "No PIDs specified when trying to open a transport stream"

If I use the following code ...
ffmpeg -t 00:02:00.000 -ss 00:01:00.000 -i %1 -vcodec mpeg2video -aspect 16:9 -profile:v 4 -level:v 6 -b:v 15000k -bufsize 25000k -maxrate 25000k -vf "scale=1920:1080,yadif=0:-1" -acodec ac3 -ab 448k -ar 48000 -ac 2 -f vob -y "%~n1.mpg"

The screen bleeds messages like ...
[vob @ 00000000025c6040] buffer underflow st=1 bufi=916 size=1792
[vob @ 00000000025c6040] buffer underflow st=1 bufi=1139 size=1792
---------------------------->
[vob @ 00000000025c6040] buffer underflow st=1 bufi=436 size=1792
[vob @ 00000000025c6040] buffer underflow st=1 bufi=659 size=1792
[vob @ 00000000025c6040] buffer underflow st=1 bufi=882 size=1792
Last message repeated 47 times

VideoRedo 3 is happy with the file generated but I do not like blood :eek:

Any help getting the first command to work would be much appreciated. :o

[Graham]

The code I'm trying to use is ...
ffmpeg -t 00:02:00.000 -ss 00:01:00.000 -i %1 -vcodec mpeg2video -aspect 16:9 -profile:v 4 -level:v 6 -b:v 15000k -bufsize 25000k -maxrate 25000k -vf "scale=1920:1080,yadif=0:-1" -acodec ac3 -ab 448k -ar 48000 -ac 2 -f mpegts -y "%~n1.ts"

A wild guess ... would "mpeg" rather than "mpegts" (or some similar change) get a result?

[p37307]

Hi All,

I need a little help converting an avc/aac ts file to mpeg/ac3 ts file.

Notice I am only extracting 2 minutes of video starting at 1 minute from the start.

Any help getting the first command to work would be much appreciated. :o

What I do is open the video in VLC and at the time I want to create a video clip (at minute 1 for your example) I just hit the "record" button and when I'm done (minute 2, for example. I hit the record button again to stop the clip recording. It saves it as an MPEG-1/2 TS with audio as A52 (Aka AC3).

Not sure if this could be an option for you


[ATTACHMENT NOT FOUND]

[puck64]

Thanks fellas.

VLC is not an option and I had tried the -f mpeg .
What I need is someone like Sub who can generate .ts files at will (NextPvr).

Looks like its back to reading the cryptic ffmpeg doco. "Not Happy Jan" :mad:

[sub]

What I need is someone like Sub who can generate .ts files at will (NextPvr).

Sorry - I'm not expert in ffmpeg. NextPVR doesn't use it for producing ts files, and never transcodes to MPEG2.

I need a little help converting an avc/aac ts file to mpeg/ac3 ts file.

Why would you want to do that? Seems like a backwards step. Most people would prefer to have the AVC/H.264 video.

[puck64]

Sorry - I'm not expert in ffmpeg. NextPVR doesn't use it for producing ts files, and never transcodes to MPEG2.

Why would you want to do that? Seems like a backwards step. Most people would prefer to have the AVC/H.264 video.

Hi Sub,

Sorry to hear you are not an expert with FFmpeg, but that's what assuming does ... makes an ass out of --- and ME

Not a backward step, just sideways .... VideoRedo 3 does not understand AVC/H264 and AAC.
I have to convert them to MPEG / AC3 so I can Kill the ADS.

Last night I added "-mpegts_m2ts_mode 1 -mpegts_pmt_start_pid 0x0100 -mpegts_start_pid 0x0150" to the first command an VideoRedo says "Negarive Offset searching for PTS"

Looks like more reading.

[p37307]

Not a backward step, just sideways ....

I'm just curious What your end purpose is?

You wanted 2 minutes in an earlier post.

What are you going to be doing with the finished converted video?

[puck64]

I'm just curious What your end purpose is?

You wanted 2 minutes in an earlier post.

What are you going to be doing with the finished converted video?

Hi Paul,

I was extracting 2 minutes of video & audio to get a sample to run through VideoRedo as a test.

The aim is to be able to convert AVC/AAC or AVC/AC3 etc to MPEG/AC3 for editing.
Our HD Channels in AU broadcast in AVC + AC3 or MPG1 or AAC, 2 to 6 channels.

After editing I then convert the video to MP4 for later viewing, when there is nothing on.

[mvallevand]

Not a backward step, just sideways .... VideoRedo 3 does not understand AVC/H264 and AAC.

Given the loss of quality in each step, it is is backward. Sounds like your player is the weakest link, not sure why you can't just use NextPVR or Kodi with comskip.

Martin

[p37307]

Hi Paul,

I was extracting 2 minutes of video & audio to get a sample to run through VideoRedo as a test.

The aim is to be able to convert AVC/AAC or AVC/AC3 etc to MPEG/AC3 for editing.
Our HD Channels in AU broadcast in AVC + AC3 or MPG1 or AAC, 2 to 6 channels.

After editing I then convert the video to MP4 for later viewing, when there is nothing on.

If this is how you want to do it, try

Code:

ffmpeg.exe -t 00:02:00.000 -ss 00:01:00.000 -i %1 -target ntsc--dvd -aspect 16:9 -ac 2 "%~n1.ts"

Code:

ffmpeg.exe -t 00:02:00.000 -ss 00:01:00.000 -i %1 -target film-dvd -aspect 16:9 -ac 2 "%~n1.ts"

You can always play with the other ffmpeg settings to fine tune.

Personally, I use MCEBuddy with Comskip to remove the commercials and convert them to MP4's. Have done literally hundreds of recorded TV shows and movies without disappointment. It does it automatically with no interaction from me other than the initial setup. It takes the TS file, cuts the commercials exchanges the TS with a MP4 then archives the TS. I periodically check the MP4's for quality issues then delete the TS files. It also writes the show info into the video itself (Description, genre, year, series and episode number) which makes it nice.

Basically MCEBuddy is a simple GUI with settings for all the backend tools like Comskip, Handbrake and FFMPEG.