For more information on transcoding please see http://www.transcoding.org/cgi-bin/transcode
From the Myth Frontend enter Setup->TVSettings->Recording Profiles->Transcoders and there is a list of Transcoders and these are:
- Autodetect from RTjpeg/MPEG4
- Autodetect from MPEG2
- High Quality
- Medium Quality
- Low Quality
They all appear to have the same values and all use the RTjpeg codec. Why RTjepg rather than MPEG4 and when does each of these get used? e.g. Autodetect vs. and non-Autodetect etc. Here are some things I found …
- RTjpeg vs. MPEG4- RTjpeg is a lot easier on the CPU than MPEG4, but the files are a lot larger.
- RTjpeg vs. MPEG4 – Picture quality of I am unsure about – anyone have any information?
If you want to see what kind of codecs and encodings settings you media file is using use the following command:
tcprobe -i yourfile
To get information such as framerate, framesize, audio sample rate, audio bits per sample, number of audio channels and audio format, use this command:
mplayer -vo dummy -identify your_file 2>&1 | grep -E “VIDEO:|AUDIO:”
or for more information:
mplayer -vo dummy -identify your_file