[FFmpeg-user] udp multicast video stream frame loss
Jacobs
jacobhameiri at gmail.com
Sun Nov 11 22:18:30 CET 2012
I need to stream video files over a wifi lan from an android tablet to other
tablets using ffmpeg.
when I stream directly to one device with udp unicast the stream is fine.
but if I stream over multicast I get a lot of frame loss in the output
video. the player is android mxplayer ( android player based on ffmpeg )
any idea how I can reduce the frame loss. this is the best command I have so
far:
ffmpeg -i /sdcard/m -vcodec mpeg4 -ab 32k -ar 22050 -tune film -b 600k -r 13
-async 1 -f mpegts udp://224.1.1.1:1234
ffmpeg version N-46525-gbc17a6f Copyright (c) 2000-2012 the FFmpeg
developers
built on Nov 8 2012 12:27:23 with gcc 4.6.x-google (GCC) 20120106
(prerelease)
configuration: --arch=arm --cpu=cortex-a8 --target-os=linux
--enable-runtime-cpudetect --prefix=/data/ --enable-pic --disable-shared
--enable-static
--cross-prefix=/home/oz/android-ndk-r8b//toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/bin/arm-linux-androideabi-
--sysroot=/home/oz/android-ndk-r8b//platforms/android-8/arch-arm
--extra-cflags='-I../x264 -mfloat-abi=softfp -mfpu=neon -mfpu=vfpv3-d16'
--extra-ldflags=-L../x264 --enable-version3 --enable-gpl --disable-doc
--enable-decoders --enable-encoders --enable-muxers --enable-demuxers
--enable-parsers --enable-protocols --enable-avresample --enable-libfreetype
--enable-indevs --disable-indev=lavfi --enable-indev=fbdev --enable-outdevs
--enable-hwaccels --enable-ffmpeg --enable-ffplay --disable-ffprobe
--disable-ffserver --enable-network --enable-pthreads --enable-libx264
--enable-zlib --enable-postproc --disable-libxvid --enable-avcodec
--enable-avformat --enable-swresample --enable-swscale --enable-postproc
--enable-avfilter --enable-avresample libavutil 52. 5.100 / 52.
5.100
libavcodec 54. 71.100 / 54. 71.100
libavformat 54. 36.100 / 54. 36.100
libavdevice 54. 3.100 / 54. 3.100
libavfilter 3. 21.106 / 3. 21.106
libswscale 2. 1.102 / 2. 1.102
libswresample 0. 16.100 / 0. 16.100
libpostproc 52. 1.100 / 52. 1.100
Input #0, avi, from '/sdcard/m':
Metadata:
encoder : transcode-1.0.6
Duration: 00:21:22.87, start: 0.000000, bitrate: 1144 kb/s
Stream #0:0: Video: mpeg4 (Advanced Simple Profile) (XVID / 0x44495658),
yuv420p, 624x352 [SAR 1:1 DAR 39:22], 23.98 tbr, 23.98 tbn, 23.98 tbc
Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 48000 Hz, stereo, s16,
128 kb/s
Please use -b:a or -b:v, -b is ambiguous
-async is forwarded to lavfi similarly to -af
aresample=min_comp=0.001:min_hard_comp=0.100000.
Output #0, mpegts, to 'udp://225.1.1.1:3333':
Metadata:
encoder : Lavf54.36.100
Stream #0:0: Video: mpeg4, yuv420p, 624x352 [SAR 1:1 DAR 39:22], q=2-31,
600 kb/s, 90k tbn, 13 tbc
Stream #0:1: Audio: mp2, 22050 Hz, stereo, s16, 32 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (mpeg4 -> mpeg4)
Stream #0:1 -> #0:1 (mp3 -> mp2)
Press [q] to stop, [?] for help
frame= 28 fps=0.0 q=2.1 size= 263kB time=00:00:02.15 bitrate=
999.2kbits/s dup=1 drop=19
frame= 52 fps= 52 q=6.9 size= 574kB time=00:00:04.00
bitrate=1174.6kbits/s dup=1 drop=39
frame= 76 fps= 50 q=8.2 size= 731kB time=00:00:05.84
bitrate=1024.9kbits/s dup=1 drop=58
frame= 102 fps= 51 q=6.7 size= 885kB time=00:00:07.84 bitrate=
924.3kbits/s dup=1 drop=80
frame= 126 fps= 50 q=7.2 size= 1026kB time=00:00:09.69 bitrate=
867.0kbits/s dup=1 drop=100
frame= 149 fps= 49 q=7.2 size= 1160kB time=00:00:11.46 bitrate=
828.9kbits/s dup=1 drop=120
frame= 175 fps= 49 q=6.9 size= 1317kB time=00:00:13.46 bitrate=
801.2kbits/s dup=1 drop=143
frame= 202 fps= 50 q=5.0 size= 1490kB time=00:00:15.53 bitrate=
785.4kbits/s dup=1 drop=165
frame= 230 fps= 50 q=6.2 size= 1651kB time=00:00:17.69 bitrate=
764.4kbits/s dup=1 drop=188
frame= 255 fps= 50 q=6.2 size= 1809kB time=00:00:19.61 bitrate=
755.3kbits/s dup=1 drop=209
frame= 280 fps= 50 q=6.0 size= 1965kB time=00:00:21.53 bitrate=
747.5kbits/s dup=1 drop=231
frame= 306 fps= 50 q=6.2 size= 2125kB time=00:00:23.53 bitrate=
739.5kbits/s dup=1 drop=252
frame= 331 fps= 50 q=8.0 size= 2295kB time=00:00:25.46 bitrate=
738.5kbits/s dup=1 drop=274
frame= 357 fps= 50 q=6.8 size= 2469kB time=00:00:27.46 bitrate=
736.5kbits/s dup=1 drop=295
frame= 382 fps= 50 q=9.3 size= 2659kB time=00:00:29.38 bitrate=
741.2kbits/s dup=1 drop=317
frame= 403 fps= 50 q=11.1 size= 2808kB time=00:00:31.00 bitrate=
742.2kbits/s dup=1 drop=334
frame= 426 fps= 49 q=12.1 size= 2977kB time=00:00:32.76 bitrate=
744.3kbits/s dup=1 drop=354
frame= 450 fps= 49 q=7.2 size= 3119kB time=00:00:34.61 bitrate=
738.1kbits/s dup=1 drop=374
frame= 477 fps= 50 q=6.9 size= 3278kB time=00:00:36.69 bitrate=
731.9kbits/s dup=1 drop=398
frame= 504 fps= 50 q=5.7 size= 3447kB time=00:00:38.76 bitrate=
728.4kbits/s dup=1 drop=420
frame= 530 fps= 50 q=6.0 size= 3606kB time=00:00:40.76 bitrate=
724.6kbits/s dup=1 drop=442
frame= 554 fps= 50 q=7.3 size= 3766kB time=00:00:42.61 bitrate=
723.9kbits/s dup=1 drop=463
frame= 579 fps= 50 q=5.5 size= 3922kB time=00:00:44.53 bitrate=
721.3kbits/s dup=1 drop=483
frame= 605 fps= 50 q=6.5 size= 4080kB time=00:00:46.53 bitrate=
718.1kbits/s dup=1 drop=505
frame= 631 fps= 50 q=6.0 size= 4247kB time=00:00:48.53 bitrate=
716.7kbits/s dup=1 drop=528
frame= 656 fps= 50 q=10.6 size= 4431kB time=00:00:50.46 bitrate=
719.3kbits/s dup=1 drop=548
frame= 680 fps= 50 q=7.4 size= 4593kB time=00:00:52.30 bitrate=
719.4kbits/s dup=1 drop=568
frame= 705 fps= 50 q=6.9 size= 4750kB time=00:00:54.23 bitrate=
717.5kbits/s dup=1 drop=589
frame= 731 fps= 50 q=5.5 size= 4919kB time=00:00:56.23 bitrate=
716.6kbits/s dup=1 drop=611
frame= 759 fps= 50 q=7.6 size= 5112kB time=00:00:58.38 bitrate=
717.3kbits/s dup=1 drop=635
frame= 775 fps= 50 q=7.1 Lsize= 5226kB time=00:00:59.61 bitrate=
718.1kbits/s dup=1 drop=648
video:4518kB audio:232kB subtitle:0 global headers:0kB muxing overhead
10.004192%
Received signal 2: terminating.
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