Opened 13 years ago
Last modified 13 years ago
#1900 new defect
Choppy video encoding to mpeg2 from h264 (mp4 container)
| Reported by: | Owned by: | reimar | |
|---|---|---|---|
| Priority: | normal | Component: | ve |
| Version: | unspecified | Severity: | major |
| Keywords: | Cc: | ||
| Blocked By: | Blocking: | ||
| Reproduced by developer: | no | Analyzed by developer: | no |
Description
I'm using PS3 media server that uses mencoder
mencoder 33159 (from archlinux repositories)
With one of the movies it is choppy and slow.
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video1.mp4':
Metadata:
major_brand : isom
minor_version : 1
compatible_brands: isomavc1
creation_time : 2011-02-19 19:16:00
encoder : Yamb 2.1.0.0 http://yamb.unite-video.com
Duration: 00:23:57.08, start: 0.021333, bitrate: 3256 kb/s
Stream #0.0(und): Video: h264 (Main), yuv420p, 1280x720 [PAR 1:1 DAR 16:9], 3006 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc
Metadata:
creation_time : 2011-02-19 19:16:00
Stream #0.1(und): Audio: aac, 48000 Hz, stereo, s16, 245 kb/s
Metadata:
creation_time : 2011-02-19 19:16:18
With the second one, everything is fine (avi container)
Input #0, avi, from 'video2.avi':
Metadata:
encoder : VirtualDubMod 1.5.10.2 (build 2540/release)
Duration: 01:35:15.66, start: 0.000000, bitrate: 3849 kb/s
Stream #0.0: Video: mpeg4, yuv420p, 1280x528 [PAR 1:1 DAR 80:33], 23.98 tbr, 23.98 tbn, 23.98 tbc
Stream #0.1: Audio: ac3, 48000 Hz, 5.1, s16, 640 kb/s
the executed line for encoding is
mkfifo --mode=777 /tmp/javaps3media/mencoder1301695142450
mencoder -ss 0 -quiet /home/marcelo/dados/temp/video1.mp4 -quiet -quiet -oac lavc -of mpeg -quiet -quiet -mpegopts format=mpeg2:muxrate=500000:vbuf_size=1194:abuf_size=
64 -ovc lavc -channels 2 -lavdopts debug=0:threads=4 -lavcopts autoaspect=1:vcodec=mpeg2video:acodec=ac3:abitrate=256:threads=4:keyint=1:vqscale=1:vqmin=2:vrc_maxrate=30000:vrc_buf_size=1835 -ass-color ffffff00 -ass-border-color 00000000 -ass-font-scale 1.0 -ass-force-style FontName=Arial,Outline=1,Shadow=1,MarginV=10 -quiet -quiet -subdelay 20000 -quiet -quiet -ofps 24000/1001 -quiet -quiet -mc 0.1 -quiet -af lavcresample=48000 -srate 48000 -o /tmp/javaps3media/mencoder1301695142450
Any idea waht is going on?
Change History (2)
comment:1 by , 13 years ago
comment:2 by , 13 years ago
I'm glad to tell that I tracked down the "tainted" codec. The problem is use the acodec=ac3 in the -lavcopts. If I use the libmp3lame everything works really fine.
Now I just don't know why...
Forgot to mention that I tried to convert the aac audio of video1.mp4 to ac3 with ffmpeg using another container (mkv). Doing this conversion video worked OK, but audio was slow and out of sync.