I'm working with video editing for years but suddenly I've stumbled upon an issue that I can't seem to figure out. I have many video files in .mkv, and I need to edit them in Sony Vegas - hence, I need to convert them. Files are 720p resolution. When I convert them though, the size difference is quite incredible - from 350MB to 1GB per file. I don't have enough space on my computer to work on such huge files, but I still need to edit them in Vegas. I've been reading about conversion, but this continues to be a confusing topic to me. From what I understood the size difference comes from bit rate change and the general settings of conversion.
Can anyone explain to me, in simple words if possible, how to reduce the size when converting? I'd love for it to be at least half the size (0.5GB at most). Maybe there is a way to keep it the same size as the original file, or would there be too much quality loss? Is the only way of reducing file size is quality loss? Maybe I could use another file extension or different settings?
General Format : Matroska Format version : Version 4 / Version 2 File size : 351 MiB Duration : 46mn 26s Overall bit rate : 1 056 Kbps Writing application : mkvmerge v7.9.0 ('Birds') 64bit Writing library : libebml v1.3.1 + libmatroska v1.4.2 Video ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : High@L4 Format settings, CABAC : Yes Format settings, ReFrames : 8 frames Codec ID : V_MPEG4/ISO/AVC Duration : 46mn 25s Bit rate : 998 Kbps Width : 1 280 pixels Height : 720 pixels Display aspect ratio : 16:9 Frame rate mode : Constant Frame rate : 23.976 (24000/1001) fps Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Progressive Bits/(Pixel*Frame) : 0.045 Stream size : 331 MiB (95%) Writing library : x264 core 146 r2538 121396c Encoding settings : cabac=1 / ref=8 / deblock=1:-1:-1 / analyse=0x3:0x133 / me=umh / subme=9 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=12 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc_lookahead=60 / rc=2pass / mbtree=1 / bitrate=998 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / aq=1:1.00 Default : Yes Forced : No Audio ID : 2 Format : AAC Format/Info : Advanced Audio Codec Format profile : HE-AAC / LC Codec ID : A_AAC Duration : 46mn 26s Bit rate : 56.0 Kbps Channel(s) : 2 channels Channel positions : Front: L R Sampling rate : 48.0 KHz / 24.0 KHz Frame rate : 23.438 fps (1024 spf) Compression mode : Lossy Delay relative to video : 31ms Stream size : 18.6 MiB (5%) Default : Yes Forced : No