Frage von Delpea:
Hi!
I recently digitized a bunch of old VHS tapes. The movies are now invited to rest in the DV codec on an external disk and will eventually (in a playerfreundliches format, H.264 or convert Mpeg2). Synonymous but after the conversion, I would like to keep the original DV video to be happy. However, the DV codec (a true memory hog, a 120-minute VHS tape corresponds to approximately 25 GB!). With about 200 VHS cassettes, the need ufert aus s.Kapazität quickly. Can someone me a nice integrated economic alternative to the DV codec recommend to record videos as high quality digital archive to be able to?
Antwort von tommyb:
Every other codec delivers high quality at similar settings, such as DV Results. Although it comes with a re-compression to quality losses - but these are not visible.
If the codec is therefore not set too low, then one can describe the result as "visually lossless", ie there is no visual loss after transcoding.
A bigger problem with the fight we have to, however, is interlacing. The majority s.Codecs although it supports many encoders, however, are very limited in terms of processing. What's more, some decoders are also not good to say about interlacing.
x264 (; an open source encoder for h264), for instance, can Verabeitung interlaced material. If you want to play again, the result must be understood that the decoder synonymous. IdR not see many decoders car that we are dealing with interlaced material, you must also force them to. This can be quite good with ffdshow, but then you must use a PC to look at the material. The problem relates to the way synonymous MPEG4 ASP codecs (, DivX, XviD). But these are not synonymous with everything evil, nor particularly well-suited for interlaced content.
A better alternative to this is MPEG2, because here can detect most of the decoder if it is interlaced material. MPEG2 does not compress as efficiently as h264 (; rule. Approx 3 to 4 times) larger files with the same quality.
To shorten the whole, here it:
1. MPEG2 used at 8 Mbit (; CBR, VBR or better). Reduce the file size to at least 1 / 3.
2. XviD / DivX or h264 used to encode interlaced material and used in conjunction with ffdshow to deinterlace when playing 50p out of it.
3. Use XviD / DivX or h264 and in conjunction with Avisynth to convert interlaced material to 50p, there is something Filter (; noise, color bleeding, etc.), adjust the resolution to about 512x384 (; more VHS now supplies really do not tend even less ) and then encode it.
I personally prefer method No.3, since this material was later re-interlace with Avisynth again to burn it possibly as a video to DVD. In addition, the file size is probably only 1 / 6 in Comparison to the starting material and possibly see it playing out even better than a good deinterlacer in ffdshow performance swallow properly - because it is worth the material before the code to get to 50p.
