Minha empresa tem um monte de câmeras IP que nós distribuímos - especificamente a Grandstream - e o fabricante mudou seu firmware. O keepalive normal que o ffmpeg usa para os fluxos rtsp (ff_rtsp_send_cmd_async (s, "GET_PARAMETER", rt- > control_uri, NULL) ou ff_rtsp_send_cmd_async (s, "OPTIONS", "*", NULL); ambos em libavformat / rtspdec.c) não está mais funcionando, por dois motivos:
1) O novo firmware Grandstream está agora verificando se há um relatório do receptor para determinar se o programa que está lendo o fluxo está ativo, e não apenas qualquer coisa.
2) O novo firmware Grandstream requer que o receptor comunique para manter a conexão ativa pelo menos uma vez a cada 25 segundos, e no fluxo de áudio está acontecendo apenas a cada 30 segundos (o vídeo está recebendo a cada 7 segundos segundos ou mais).
Então, após cerca de um minuto com o ffmpeg conectado, a câmera pára de enviar o fluxo de áudio, o fluxo de áudio no ffmpeg lê o fim do arquivo e, em seguida, o ffmpeg desliga tudo.
Como não posso mudar o firmware, estou tentando cavar o código do ffmpeg para fazer com que ele envie o relatório do receptor apropriado para o keep alive ... mas estou chegando a lugar nenhum. Eu adicionei um pequeno trecho de código nos relatórios do receptor, então eu sei quando eles estão rodando quando eu chamo o ffmpeg no debug, mas ... bem, ele não está indo bem.
Comando de teste:
ffmpeg -loglevel debug -i rtsp: // admin: [email protected]: 554/0 -acodec libmp3lame -ar 22050 -vcodec copia -y -f flv / dev / null & > test.txt
Teste de saída:
'[root@localhost ffmpeg]# cat test.txt
ffmpeg version 2.0 Copyright (c) 2000-2013 the FFmpeg developers
built on Aug 21 2013 14:24:28 with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-3)
configuration: --datadir=/usr/share/ffmpeg --bindir=/usr/local/bin --libdir=/usr/local/lib --incdir=/usr/local/include --shlibdir=/usr/lib --mandir=/usr/share/man --disable-avisynth --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m32 -march=i386 -mtune=generic -fasynchronous-unwind-tables' --enable-avfilter --enable-libx264 --enable-gpl --enable-version3 --enable-postproc --enable-pthreads --enable-shared --enable-swscale --enable-vdpau --enable-x11grab --enable-librtmp --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-static --enable-libgsm --enable-libxvid --enable-libvpx --enable-libvorbis --enable-libvo-aacenc --enable-libmp3lame
libavutil 52. 38.100 / 52. 38.100
libavcodec 55. 18.102 / 55. 18.102
libavformat 55. 12.100 / 55. 12.100
libavdevice 55. 3.100 / 55. 3.100
libavfilter 3. 79.101 / 3. 79.101
libswscale 2. 3.100 / 2. 3.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 3.100 / 52. 3.100
Splitting the commandline.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.
Reading option '-i' ... matched as input file with argument 'rtsp://admin:[email protected]:554/0'.
Reading option '-acodec' ... matched as option 'acodec' (force audio codec ('copy' to copy stream)) with argument 'libmp3lame'.
Reading option '-ar' ... matched as option 'ar' (set audio sampling rate (in Hz)) with argument '22050'.
Reading option '-vcodec' ... matched as option 'vcodec' (force video codec ('copy' to copy stream)) with argument 'copy'.
Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'flv'.
Reading option '/dev/null' ... matched as output file.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option loglevel (set logging level) with argument debug.
Applying option y (overwrite output files) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input file rtsp://admin:[email protected]:554/0.
Successfully parsed a group of options.
Opening an input file: rtsp://admin:[email protected]:554/0.
[rtsp @ 0x9d9ccc0] SDP:
v=0
o=StreamingServer 3331435948 1116907222000 IN IP4 192.168.4.3
s=h264.mp4
c=IN IP4 0.0.0.0
t=0 0
a=control:*
m=video 0 RTP/AVP 96
a=control:trackID=0
a=rtpmap:96 H264/90000
a=fmtp:96 packetization-mode=1; sprop-parameter-sets=Z0LgHtoCgPRA,aM4wpIA=
m=audio 0 RTP/AVP 0
a=control:trackID=1
a=rtpmap:0 PCMU/8000
a=ptime:20
m=application 0 RTP/AVP 107
a=control:trackID=2
a=rtpmap:107 vnd.onvif.metadata/90000
[rtsp @ 0x9d9ccc0] video codec set to: h264
[NULL @ 0x9d9f400] RTP Packetization Mode: 1
[NULL @ 0x9d9f400] Extradata set to 0x9d9f900 (size: 22)!
[rtsp @ 0x9d9ccc0] audio codec set to: pcm_mulaw
[rtsp @ 0x9d9ccc0] audio samplerate set to: 8000
[rtsp @ 0x9d9ccc0] audio channels set to: 1
[rtsp @ 0x9d9ccc0] hello state=0
[h264 @ 0x9d9f400] Current profile doesn't provide more RBSP data in PPS, skipping
Last message repeated 1 times
[rtsp @ 0x9d9ccc0] All info found
Guessed Channel Layout for Input Stream #0.1 : mono
Input #0, rtsp, from 'rtsp://admin:[email protected]:554/0':
Metadata:
title : h264.mp4
Duration: N/A, start: 0.000000, bitrate: 64 kb/s
Stream #0:0, 28, 1/90000: Video: h264 (Constrained Baseline), yuv420p, 640x480, 1/180000, 10 tbr, 90k tbn, 180k tbc
Stream #0:1, 156, 1/8000: Audio: pcm_mulaw, 8000 Hz, mono, s16, 64 kb/s
Successfully opened the file.
Parsing a group of options: output file /dev/null.
Applying option acodec (force audio codec ('copy' to copy stream)) with argument libmp3lame.
Applying option ar (set audio sampling rate (in Hz)) with argument 22050.
Applying option vcodec (force video codec ('copy' to copy stream)) with argument copy.
Applying option f (force format) with argument flv.
Successfully parsed a group of options.
Opening an output file: /dev/null.
Successfully opened the file.
detected 2 logical cores
[graph 0 input from stream 0:1 @ 0x9f15380] Setting 'time_base' to value '1/8000'
[graph 0 input from stream 0:1 @ 0x9f15380] Setting 'sample_rate' to value '8000'
[graph 0 input from stream 0:1 @ 0x9f15380] Setting 'sample_fmt' to value 's16'
[graph 0 input from stream 0:1 @ 0x9f15380] Setting 'channel_layout' to value '0x4'
[graph 0 input from stream 0:1 @ 0x9f15380] tb:1/8000 samplefmt:s16 samplerate:8000 chlayout:0x4
[audio format for output stream 0:1 @ 0x9efa7c0] Setting 'sample_fmts' to value 's32p|fltp|s16p'
[audio format for output stream 0:1 @ 0x9efa7c0] Setting 'sample_rates' to value '22050'
[audio format for output stream 0:1 @ 0x9efa7c0] Setting 'channel_layouts' to value '0x4|0x3'
[audio format for output stream 0:1 @ 0x9efa7c0] auto-inserting filter 'auto-inserted resampler 0' between the filter 'Parsed_anull_0' and the filter 'audio format for output stream 0:1'
[AVFilterGraph @ 0x9f15980] query_formats: 4 queried, 9 merged, 3 already done, 0 delayed
[auto-inserted resampler 0 @ 0x9dfada0] ch:1 chl:mono fmt:s16 r:8000Hz -> ch:1 chl:mono fmt:s16p r:22050Hz
Output #0, flv, to '/dev/null':
Metadata:
title : h264.mp4
encoder : Lavf55.12.100
Stream #0:0, 0, 1/1000: Video: h264 ([7][0][0][0] / 0x0007), yuv420p, 640x480, 1/90000, q=2-31, 1k tbn, 90k tbc
Stream #0:1, 0, 1/1000: Audio: mp3 (libmp3lame) ([2][0][0][0] / 0x0002), 22050 Hz, mono, s16p
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (pcm_mulaw -> libmp3lame)
Press [q] to stop, [?] for help
Current profile doesn't provide more RBSP data in PPS, skippingrate= 135.4kbits/s
Current profile doesn't provide more RBSP data in PPS, skippingrate= 134.4kbits/s
Current profile doesn't provide more RBSP data in PPS, skippingrate= 135.0kbits/s
Current profile doesn't provide more RBSP data in PPS, skippingrate= 135.5kbits/s
Current profile doesn't provide more RBSP data in PPS, skippingrate= 136.9kbits/s
Queue input is backward in time= 233kB time=00:00:13.69 bitrate= 139.4kbits/s
Current profile doesn't provide more RBSP data in PPS, skippingrate= 136.3kbits/s
[flv @ 0x9de1200] Non-monotonous DTS in output stream 0:1; previous: 14239, current: 13926; changing to 14239. This may result in incorrect timestamps in the output file.
[flv @ 0x9de1200] Non-monotonous DTS in output stream 0:1; previous: 14239, current: 13952; changing to 14239. This may result in incorrect timestamps in the output file.
[flv @ 0x9de1200] Non-monotonous DTS in output stream 0:1; previous: 14239, current: 13979; changing to 14239. This may result in incorrect timestamps in the output file.
[flv @ 0x9de1200] Non-monotonous DTS in output stream 0:1; previous: 14239, current: 14005; changing to 14239. This may result in incorrect timestamps in the output file.
[flv @ 0x9de1200] Non-monotonous DTS in output stream 0:1; previous: 14239, current: 14031; changing to 14239. This may result in incorrect timestamps in the output file.
[flv @ 0x9de1200] Non-monotonous DTS in output stream 0:1; previous: 14239, current: 14057; changing to 14239. This may result in incorrect timestamps in the output file.
[flv @ 0x9de1200] Non-monotonous DTS in output stream 0:1; previous: 14239, current: 14083; changing to 14239. This may result in incorrect timestamps in the output file.
[flv @ 0x9de1200] Non-monotonous DTS in output stream 0:1; previous: 14239, current: 14109; changing to 14239. This may result in incorrect timestamps in the output file.
[flv @ 0x9de1200] Non-monotonous DTS in output stream 0:1; previous: 14239, current: 14135; changing to 14239. This may result in incorrect timestamps in the output file.
[flv @ 0x9de1200] Non-monotonous DTS in output stream 0:1; previous: 14239, current: 14161; changing to 14239. This may result in incorrect timestamps in the output file.
[flv @ 0x9de1200] Non-monotonous DTS in output stream 0:1; previous: 14239, current: 14188; changing to 14239. This may result in incorrect timestamps in the output file.
[flv @ 0x9de1200] Non-monotonous DTS in output stream 0:1; previous: 14239, current: 14214; changing to 14239. This may result in incorrect timestamps in the output file.
Current profile doesn't provide more RBSP data in PPS, skippingrate= 141.5kbits/s
Current profile doesn't provide more RBSP data in PPS, skippingrate= 142.0kbits/s
Current profile doesn't provide more RBSP data in PPS, skippingrate= 142.5kbits/s
Receiver Report delay: 469789, gettime: -1527669086, last_recep: 322446, timebase: -1534837492
Current profile doesn't provide more RBSP data in PPS, skippingrate= 141.5kbits/s
Current profile doesn't provide more RBSP data in PPS, skippingrate= 141.7kbits/s
Current profile doesn't provide more RBSP data in PPS, skippingrate= 141.1kbits/s
Current profile doesn't provide more RBSP data in PPS, skippingrate= 140.6kbits/s
Current profile doesn't provide more RBSP data in PPS, skippingrate= 140.7kbits/s
Current profile doesn't provide more RBSP data in PPS, skippingrate= 139.9kbits/s
Receiver Report delay: 132993, gettime: -1516538925, last_recep: 322446, timebase: -1518568234
Current profile doesn't provide more RBSP data in PPS, skippingrate= 139.6kbits/s
Current profile doesn't provide more RBSP data in PPS, skippingrate= 139.6kbits/s
Current profile doesn't provide more RBSP data in PPS, skippingrate= 139.7kbits/s
Current profile doesn't provide more RBSP data in PPS, skippingrate= 139.4kbits/s
Current profile doesn't provide more RBSP data in PPS, skippingrate= 140.0kbits/s
Receiver Report delay: 897727, gettime: -1504870331, last_recep: 322446, timebase: -1518568552
[NULL @ 0x9d9f400] Current profile doesn't provide more RBSP data in PPS, skipping
Current profile doesn't provide more RBSP data in PPS, skippingrate= 139.4kbits/s
Current profile doesn't provide more RBSP data in PPS, skippingrate= 139.1kbits/s
Current profile doesn't provide more RBSP data in PPS, skippingrate= 139.0kbits/s
Current profile doesn't provide more RBSP data in PPS, skippingrate= 139.0kbits/s
Current profile doesn't provide more RBSP data in PPS, skippingrate= 138.6kbits/s
Current profile doesn't provide more RBSP data in PPS, skippingrate= 138.5kbits/s
Current profile doesn't provide more RBSP data in PPS, skippingrate= 138.2kbits/s
EOF on sink link output stream 0:1:default.time=00:00:58.40 bitrate= 139.6kbits/s
No more output streams to write to, finishing.
[libmp3lame @ 0x9dfa580] Trying to remove 344 more samples than there are in the queue
frame= 589 fps= 11 q=-1.0 Lsize= 1003kB time=00:00:58.85 bitrate= 139.5kbits/s
video:724kB audio:231kB subtitle:0 global headers:0kB muxing overhead 4.955356%
2959 frames successfully decoded, 0 decoding errors
[AVIOContext @ 0x9e021c0] Statistics: 3 seeks, 2860 writeouts
[root@localhost ffmpeg]#