webm to mp4 conversion using ffmpeg -


when try convert webm file mp4 output very choppy , appears if many frames have been dropped ffmpeg

i used following commands convert

ffmpeg -i movie.webm movie.mp4 ffmpeg -i movie.webm -vcodec libx264 movie.mp4 ffmpeg -i movie.webm -vcodec libx264 -qscale 0 movie.mp4

all of them have same problem. when use ffprobe seems show frames more or less properly.

update:

 built on jun 14 2013 14:31:50 gcc 4.7 (ubuntu/linaro 4.7.2-2ubuntu1)   configuration: --prefix=/home/user2/ffmpeg_build --extra-cflags=-i/home/user2/ffmpeg_build/include --extra-ldflags=-l/home/pavan4/ffmpeg_build/lib --bindir=/home/pavan4/bin --extra-libs=-ldl --enable-gpl --enable-libass --enable-libfdk-aac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-x11grab   libavutil      52. 35.101 / 52. 35.101   libavcodec     55. 16.100 / 55. 16.100   libavformat    55.  8.102 / 55.  8.102   libavdevice    55.  2.100 / 55.  2.100   libavfilter     3. 77.101 /  3. 77.101   libswscale      2.  3.100 /  2.  3.100   libswresample   0. 17.102 /  0. 17.102   libpostproc    52.  3.100 / 52.  3.100 hyper fast audio , video encoder usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...  use -h full or, better, run 'man ffmpeg'  input #0, matroska,webm, '1.webm':   duration: 00:00:10.64, start: 0.000000, bitrate: 5024 kb/s     stream #0:0(eng): video: vp8, yuv420p, 1280x720, sar 1:1 dar 16:9, 1k fps, 1k tbr, 1k tbn, 1k tbc (default) [libx264 @ 0x1d966a0] using sar=1/1 [libx264 @ 0x1d966a0] mb rate (3600000) > level limit (2073600) [libx264 @ 0x1d966a0] using cpu capabilities: mmx2 sse2fast ssse3 sse4.2 [libx264 @ 0x1d966a0] profile high, level 5.2 [libx264 @ 0x1d966a0] 264 - core 133 r2 a3ac64b - h.264/mpeg-4 avc codec - copyleft 2003-2013 - http://www.videolan.org/x264.html - options: 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=12 lookahead_threads=2 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=25 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 output #0, mp4, '1_conv4.mp4':   metadata:     encoder         : lavf55.8.102     stream #0:0(eng): video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1280x720 [sar 1:1 dar 16:9], q=-1--1, 16k tbn, 1k tbc (default) stream mapping: stream #0:0 -> #0:0 (vp8 -> libx264) press [q] stop, [?] frame=  168 fps=0.0 q=33.0 size=      62kb time=00:00:00.11 bitrate=4606.0kbits/frame=  293 fps=230 q=33.0 size=     138kb time=00:00:00.23 bitrate=4809.7kbits/  video:5620kb audio:0kb subtitle:0 global headers:0kb muxing overhead 2.212461% [libx264 @ 0x1d966a0] frame i:46    avg qp:18.50  size: 39849 [libx264 @ 0x1d966a0] frame p:2940  avg qp:18.27  size:  1222 [libx264 @ 0x1d966a0] frame b:7651  avg qp:17.68  size:    43 [libx264 @ 0x1d966a0] consecutive b-frames:  4.0%  0.2%  0.3% 95.5% [libx264 @ 0x1d966a0] mb  i16..4: 19.9% 63.2% 16.9% [libx264 @ 0x1d966a0] mb p  i16..4:  0.2%  0.5%  0.1%  p16..4:  3.9%  1.1%  0.6%  0.0%  0.0%    skip:93.6% [libx264 @ 0x1d966a0] mb b  i16..4:  0.0%  0.0%  0.0%  b16..8:  0.2%  0.0%  0.0%  direct: 0.0%  skip:99.8%  l0:25.1% l1:74.9% bi: 0.0% [libx264 @ 0x1d966a0] 8x8 transform intra:63.6% inter:75.9% [libx264 @ 0x1d966a0] coded y,uvdc,uvac intra: 61.5% 53.4% 24.4% inter: 0.5% 0.5% 0.0% [libx264 @ 0x1d966a0] i16 v,h,dc,p: 52% 19% 19% 11% [libx264 @ 0x1d966a0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 32% 17% 13%  4%  6%  9%  5%  8%  6% [libx264 @ 0x1d966a0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 30% 18% 14%  5%  8% 10%  6%  6%  3% [libx264 @ 0x1d966a0] i8c dc,h,v,p: 55% 17% 24%  4% [libx264 @ 0x1d966a0] weighted p-frames: y:0.0% uv:0.0% [libx264 @ 0x1d966a0] ref p l0: 82.5% 13.2%  4.0%  0.3% [libx264 @ 0x1d966a0] ref b l0: 60.2% 39.2%  0.6% [libx264 @ 0x1d966a0] ref b l1: 98.5%  1.5% [libx264 @ 0x1d966a0] kb/s:4327.77

as input file report strange frame rate value 1k fps coming tbs , tbr value (look here definition)

the encoder generate different result, 16k tbn, 1k tbc (default)

so calling :

ffmpeg -fflags +genpts -i 1.webm -r 24 1.mp4

you configure ffmpeg generate new pts (a/k.a presentation timestamp) each frame , set target frame-rate 24.

so output mp4 file info (ffmpeg -i ....) change from

stream #0:0(eng): video: h264 (high) (avc1 / 0x31637661), yuv420p, 1280x720 [sar 1:1 dar 16:9], 4327 kb/s, 1000.09 fps, 1k tbr, 16k tbn, 2k tbc

to 

stream #0:0(eng): video: h264 (high) (avc1 / 0x31637661), yuv420p, 1280x720 [sar 1:1 dar 16:9], 1670 kb/s, 24 fps, 24 tbr, 12288 tbn, 48 tbc

Comments

Post a Comment

Popular posts from this blog

image - ClassNotFoundException when add a prebuilt apk into system.img in android -

i'm in trouble add prebuilt apk system.img based taiwan mtk android phone platform, when push apk onto device,after reboot phone,the apk can installed succecessfully,but if add apk alps/out/target/product/$prj/system/app or vendor/mediatek/$prj/artifacts/out/target/product/$prj/system/app ,and produce system.img,the apk can't installed normally,the logcat say: a.lang.runtimeexception: unable instantiate activity componentinfo{com.sec.android.widgetapp.ap.hero.accuweather.widget/com.sec.android.widgetapp.ap.hero.accuweather.widget.weatherclock}: java.lang.classnotfoundexception: com.sec.android.widgetapp.ap.hero.accuweather.widget.weatherclock. can tell me what's problem ? when package manager installs apps part of system partition different installing apps on data partition. looks app using libraries somewhere else. when install on data lib directory created in apps data directory , symlinked /data/app-lib/. when apps installed on system it's expecte...
Read more

I need to import mysql 5.1 to 5.5? -

i have mysql 5.1 database , need import localhost running 5.5. how import 5.5 or downgrade mysql? install phpmyadmin 5.1 os: http://www.wikihow.com/install-phpmyadmin-on-your-windows-pc or https://www.digitalocean.com/community/articles/how-to-install-and-secure-phpmyadmin-on-ubuntu-12-04 then login, click on database, hit export, , export in sql format (quick fine). import .sql file 5.5 server (after installing phpmyadmin) logging in clicking database , hit import. hope helps!
Read more

Java, Hibernate, MySQL - store UTC date-time -

i saw here on few related questions (like this one , of course, this one )... essentially, want store date-time utc, , let application user choose time zone wants display date-time in. since seems date-time fields affected underlying jdbc driver, wonder if acceptable way go storing utc date-time: set both mysql , application server machine utc time zone (no need separate) both mysql , jvm should pick underlying system time settings (if not instructed otherwise) use datetime table columns on mysql side use java.util.date corresponding mapping on hibernate side (i guess java.sql.timestamp used too) let application worry interpreting date-time fields - i.e. let user choose preferred time zone is ok? edit clarify - here meant refer timestamps created strictly on server (e.g.date-time of record creation). application server instantiates date objects (new date() equals current date-time on server, , time zone agnostic). if client user wants supply date searching/filte...
Read more