I don't know much about multimedia knowledge. I know sony .mts file is a type of H.264 container. I use ffmpeg to dump my .mts file into a .mpeg file. Except the .mpeg file is shrunk around 5 times smaller in size than .mts, the ffmpeg dump information on both files is identical. I am confusing why .mts files have large size. What important features are lost by my conversion?
Thanks!
Kejia
Thanks to all answers.
I checked the output of both again and found that there is one different place: bitrate. Then I definitely lost quality. Now I adjust the bit rate in terms of the expectation to displaying equipment---yes, considering displaying equipments is necessary (an expert's advice): $ ffmpeg -b 9498k -i my.mts my.mpg. Another interesting option is -ab, audio bit rate.
MTS files typically come from high-definition camcorders. They use the AVCHD coded which uses MPEG-4 AVC/H.264 video encoding and Dolby AC-3 (Dolby Digital) or uncompressed linear PCM audio coding. Are you sure that you are not decreasing the quality or resolution?