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I'm looking at this question
and I want to do it using avconv, however, I'd also like to shrink the frame size by about half. My problem is when I do
avconv -i "$file" -s 640x480 -strict experimental "mp4/$file.mp4"
The output is incredibly pixelated and degrades quality of video too much. I'm trying to convert video file to smaller size for my handheld. Basically, I'm trying to get this:
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L3.1
Format settings, CABAC : No
Format settings, ReFrames : 4 frames
Format settings, GOP : M=2, N=48
Codec ID : V_MPEG4/ISO/AVC
Duration : 21mn 31s
Bit rate mode : Variable
Maximum bit rate : 1 101 Kbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 23.976 fps
Standard : Component
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Default : Yes
Forced : No
To look like this
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.0
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 21mn 45s
Bit rate : 218 Kbps
Width : 624 pixels
Height : 352 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.041
Stream size : 33.9 MiB (60%)
Writing library : x264 core 138 r2 9e941d1
Encoding settings : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=3 / 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=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=23.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Question: How do you reduce bit rate and frame size using avconv? If it can't be done in avconv, can it me done in ffmpeg? Video in upper part ~= 200mb, video in lower part ~=50mb, I want to get 50mb with as little pixelation as possible.
i think ur right, i compiled ffmpeg using this guide http://ffmpeg.org/trac/ffmpeg/wiki/UbuntuCompilationGuide, but avconv isnt using correct libs, let me try ffmpeg when i get home and ill approve ur answer if it works
– hahahahahahahaha – 2013-09-10T01:31:07.753