What settings in AviDemux for SD and HD?

[calande]

Hello,

I record TV with my DVB-T board on my PC but the files are large (several gigs for a movie, even in SD). Some TV programs are in SD, some in HD. I'd like to resample them in order to reduce disk space used. However, I'd like also to keep the same quality felt when watching. I'd like SD programs to stay in SD and HD programs to stay in HD quality. Here's the media info for an SD program:

General
ID                               : BB
Complete name                    : /home/charles/Desktop/14 - ARTE - Mon 24 May 2010 02:56:54 AM CEST.mpeg
Format                           : MPEG-TS
File size                        : 3.73 MiB
Duration                         : 6s 68ms
Overall bit rate                 : 4 904 Kbps

Video
ID                               : 520 (0x208)
Menu ID                          : 1000 (0x3E8)
Format                           : MPEG Video
Format version                   : Version 2
Format profile                   : Main@Main
Format settings, BVOP            : Yes
Format settings, Matrix          : Default
Duration                         : 6s 40ms
Bit rate mode                    : Variable
Bit rate                         : 4 273 Kbps
Nominal bit rate                 : 15.0 Mbps
Width                            : 720 pixels
Height                           : 576 pixels
Display aspect ratio             : 16:9
Frame rate                       : 25.000 fps
Standard                         : PAL
Color space                      : YUV
Chroma subsampling               : 4:2:0
Bit depth                        : 8 bits
Bits/(Pixel*Frame)               : 0.412
Stream size                      : 3.08 MiB (83%)

Audio #1
ID                               : 530 (0x212)
Menu ID                          : 1000 (0x3E8)
Format                           : MPEG Audio
Format version                   : Version 1
Format profile                   : Layer 2
Mode                             : Joint stereo
Mode extension                   : Intensity Stereo + MS Stereo
Duration                         : 6s 48ms
Bit rate mode                    : Constant
Bit rate                         : 192 Kbps
Channel(s)                       : 2 channels
Sampling rate                    : 48.0 KHz
Video delay                      : -258ms
Stream size                      : 142 KiB (4%)
Language                         : French

Audio #2
ID                               : 531 (0x213)
Menu ID                          : 1000 (0x3E8)
Format                           : MPEG Audio
Format version                   : Version 1
Format profile                   : Layer 2
Mode                             : Joint stereo
Mode extension                   : Intensity Stereo + MS Stereo
Duration                         : 6s 48ms
Bit rate mode                    : Constant
Bit rate                         : 192 Kbps
Channel(s)                       : 2 channels
Sampling rate                    : 48.0 KHz
Video delay                      : -258ms
Stream size                      : 142 KiB (4%)
Language                         : German

Text #1
ID                               : 540 (0x21C)
Menu ID                          : 1000 (0x3E8)
Format                           : DVB Subtitles
Language                         : French

Text #2
ID                               : 541 (0x21D)
Menu ID                          : 1000 (0x3E8)
Format                           : DVB Subtitles
Language                         : German

Text #3
ID                               : 542 (0x21E)
Menu ID                          : 1000 (0x3E8)
Format                           : DVB Subtitles
Language                         : French

And here's for an HD program:

General
Complete name                    : /home/charles/Desktop/video.mpg
Format                           : MPEG-PS
File size                        : 9.21 MiB
Duration                         : 10s 278ms
Overall bit rate                 : 7 517 Kbps

Video
ID                               : 224 (0xE0)
Format                           : AVC
Format/Info                      : Advanced Video Codec
Format profile                   : Main@L4.0
Format settings, CABAC           : Yes
Format settings, ReFrames        : 4 frames
Duration                         : 10s 278ms
Bit rate                         : 7 368 Kbps
Width                            : 1 440 pixels
Height                           : 1 080 pixels
Display aspect ratio             : 16:9
Frame rate                       : 25.000 fps
Color space                      : YUV
Chroma subsampling               : 4:2:0
Bit depth                        : 8 bits
Scan type                        : Interlaced
Scan order                       : Top Field First
Bits/(Pixel*Frame)               : 0.189
Stream size                      : 9.03 MiB (98%)
Color primaries                  : BT.709-5, BT.1361, IEC 61966-2-4, SMPTE RP177
Transfer characteristics         : BT.709-5, BT.1361
Matrix coefficients              : BT.709-5, BT.1361, IEC 61966-2-4 709, SMPTE RP177

Could you give me your suggested settings in AviDemux in order to resample them without losing quality? (frames per sec., bitrate, audio format, video format, container, etc.)
Thanks!

[Baldrick]

Lower the video bitrate and keep everything else the same. Use mpeg4 avc (h264) video encoding and if you want a specific file size use 2-pass video size and set the file size or if you don't need that try use constant rate factor quality encoding(try use around 23).

See screenshots:

[calande]

Thanks, I'm going to try these settings.

[Baldrick]

Export as a mp4.


And if you get problems with avidemux you can try staxrip, handbrake , xvid4psp or megui.

[calande]

I'd like not to use x264 if possible, as I have experienced problems on some friends computer... What do you suggest?

[Baldrick]

Then try mpeg-4 asp xvid. Use similar settings.

But you should be able to get better quality with h264.

[calande]

Thanks. Also: Same settings for both SD and HD, right?

[calande]

Were these settings for SD or HD? I think this is for SD. What settings should I use for HD? Thanks.