[FFmpeg-user] trying to add a color screen to a radio input

[Timothy Gu]

On Mar 16, 2013 3:46 PM, "JULIAN GARDNER" <joolzg at btinternet.com> wrote:
>
> I have this running on an old version 33000, but on a newer build i get
1000 fps+
>
> my command line for the old one is
>
> -i "http://http-live.sr.se/p1-mp3-192' -metadata service_name="SVT P1" -f
lavfi -i color=black:qcif:25 -vcodec libx264 -preset faster -x264opts
keyint=75:bitrate=100 -bufsize 1M -r 25 -acodec libfaac -ab 128k -ar 32k
-ac 2 -f mpegts "udp://225.170.150.32:1234?pkt_size=1316;buffer_size=1048576
"
>
> This works, but running this on a new ffmpeg i get fps over 1000 for the
above, now i changed this to
>
> So i change a test one to
>
> ffmpeg -i "
http://bbcmedia.ic.llnwd.net/stream/bbcmedia_intl_lc_radio1_p?s=1361437907&e=1361452307&h=69ffe22fd4569876fc2ecba42df034d9"
-metadata service_name="BBC Radio 1" -f lavfi -i color=r=25 -vcodec libx264
-preset faster -x264opts keyint=75:bitrate=100 -bufsize 1M -r 25 -acodec
libfaac -ab 128k -ar 32k -ac 2 -f mpegts "udp://
225.170.200.32:1234?pkt_size=1316;buffer_size=1048576"
>
> and the output is
>
> ffmpeg version N-50481-ge228270 Copyright (c) 2000-2013 the FFmpeg
developers
>   built on Mar  5 2013 10:29:56 with gcc 4.6.1 (Ubuntu/Linaro
4.6.1-9ubuntu3)
>   configuration: --enable-gpl --enable-version3 --enable-nonfree
--enable-postproc --enable-libfaac --enable-libmp3lame --enable-libx264
>   libavutil      52. 17.103 / 52. 17.103
>   libavcodec     54. 92.100 / 54. 92.100
>   libavformat    54. 63.102 / 54. 63.102
>   libavdevice    54.  3.103 / 54.  3.103
>   libavfilter     3. 41.100 /  3. 41.100
>   libswscale      2.  2.100 /  2.  2.100
>   libswresample   0. 17.102 /  0. 17.102
>   libpostproc    52.  2.100 / 52.  2.100
> [aac @ 0x190b960] max_analyze_duration 5000000 reached at 5024000
microseconds
> [aac @ 0x190b960] Estimating duration from bitrate, this may be inaccurate
> Input #0, aac, from '
http://bbcmedia.ic.llnwd.net/stream/bbcmedia_intl_lc_radio1_p?s=1361437907&e=1361452307&h=69ffe22fd4569876fc2ecba42df034d9
':
>   Duration: N/A, bitrate: 55 kb/s
>     Stream #0:0: Audio: aac, 32000 Hz, stereo, fltp, 55 kb/s
> [lavfi @ 0x191fb80] Estimating duration from bitrate, this may be
inaccurate
> Input #1, lavfi, from 'color=r=25':
>   Duration: N/A, start: 0.000000, bitrate: N/A
>     Stream #1:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 320x240
[SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
> [libx264 @ 0x1921a40] VBV maxrate unspecified, assuming CBR
> [libx264 @ 0x1921a40] using SAR=1/1
> [libx264 @ 0x1921a40] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
AVX
> [libx264 @ 0x1921a40] profile High, level 1.3
> Output #0, mpegts, to 'udp://
225.170.200.32:1234?pkt_size=1316;buffer_size=1048576':
>   Metadata:
>     encoder         : Lavf54.63.102
>     Stream #0:0: Video: h264, yuv420p, 320x240 [SAR 1:1 DAR 4:3],
q=-1--1, 100 kb/s, 90k tbn, 25 tbc
>     Stream #0:1: Audio: aac, 32000 Hz, stereo, s16, 128 kb/s
> Stream mapping:
>   Stream #1:0 -> #0:0 (rawvideo -> libx264)
>   Stream #0:0 -> #0:1 (aac -> libfaac)
> Press [q] to stop, [?] for help
> frame= 4209 fps=869 q=32766.0 Lsize=    1036kB time=00:02:48.28 bitrate=
50.4kbits/s
> video:76kB audio:193kB subtitle:0 global headers:0kB muxing overhead
284.644791%
> [libx264 @ 0x1921a40] frame I:57    Avg QP: 0.00  size:   118
> [libx264 @ 0x1921a40] frame P:1066  Avg QP: 0.00  size:    19
> [libx264 @ 0x1921a40] frame B:3086  Avg QP: 0.02  size:    17
> [libx264 @ 0x1921a40] consecutive B-frames:  1.4%  2.7%  0.0% 96.0%
> [libx264 @ 0x1921a40] mb I  I16..4: 99.7%  0.0%  0.3%
> [libx264 @ 0x1921a40] mb P  I16..4:  0.0%  0.0%  0.0%  P16..4:  0.0%
0.0%  0.0%  0.0%  0.0%    skip:100.0%
> [libx264 @ 0x1921a40] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.0%
0.0%  0.0%  direct: 0.0%  skip:100.0%
> [libx264 @ 0x1921a40] 8x8 transform intra:0.0%
> [libx264 @ 0x1921a40] coded y,uvDC,uvAC intra: 0.1% 0.0% 0.0% inter: 0.0%
0.0% 0.0%
> [libx264 @ 0x1921a40] i16 v,h,dc,p: 94%  0%  6%  0%
> [libx264 @ 0x1921a40] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu:  0%  0% 100%  0%
0%  0%  0%  0%  0%
> [libx264 @ 0x1921a40] i8c dc,h,v,p: 100%  0%  0%  0%
> [libx264 @ 0x1921a40] Weighted P-Frames: Y:0.0% UV:0.0%
> [libx264 @ 0x1921a40] kb/s:3.72
>
> Im still getting over 900 fps, any ideas?

I don't get what you are asking. Is the output worse than before or
something else? The fps value means the conversion speed in fps, not the
framerate of output video. A higher fps means that the conversion speed is
higher.

One thing to note is that the bit rate for video is 100 bits per second,
which is extremely low. Do you mean 100k?

Timothy
>
> joolz
> _______________________________________________
> ffmpeg-user mailing list
> ffmpeg-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user