[FFmpeg-user] capture mpeg2 from dvdlast

[Carl Eugen Hoyos]

2018-11-22 17:36 GMT+01:00, Javier Fuentes <jfuentes at flumotion.com>:
> Hello Everybody
>
>
> I have this ffmpeg command
> ffmpeg -i rtp://127.0.0.1:6000 -map 0:4 -map 0:2 -vcodec libx264 -b:v 1500k
> -s 720x576 -acodec aac  -ab 128k -ac 2 -ar 48000 -r 25 -f flv
> rtmp://encoder....
>
> I have a lot of errors when i start capture a mpeg2 signal, and after a
> while the capture starts to fail
>
> Thanks a lot for your help
> Best regards
>
> My log
> ffmpeg version git-2018-11-12-ae43235 Copyright (c) 2000-2018 the FFmpeg
> developers
>   built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-28)
>   configuration: --prefix=/root/ffmpeg_build
> --extra-cflags=-I/root/ffmpeg_build/include
> --extra-ldflags=-L/root/ffmpeg_build/lib --bindir=/root/bin
> --extra-libs=-ldl --enable-gpl --enable-nonfree --enable-libfdk_aac
> --enable-libmp3lame --enable-libvpx --enable-libx264 --enable-libfreetype

> --enable-libspeex --enable-libtheora --enable-libass --enable-avfilter
> --enable-pthreads --enable-decoder=mpeg4 --enable-decoder=mpegvideo
> --enable-parser=mpeg4video --enable-parser=mpegvideo
> --enable-muxer=mpeg2video --enable-muxer=mp4 --enable-muxer=h264
> --enable-demuxer=h264 --enable-parser=ac3 --enable-parser=h261
> --enable-parser=vc1 --enable-decoder=aac --enable-parser=aac
> --enable-demuxer=aac --enable-demuxer=vc1 --enable-decoder=h264
> --enable-parser=h264 --enable-demuxer=h264 --enable-muxer=h264

While this is probably unrelated, these unused options make
the issue needlessly harder to debug...

>   libavutil      56. 23.101 / 56. 23.101
>   libavcodec     58. 39.100 / 58. 39.100
>   libavformat    58. 22.100 / 58. 22.100
>   libavdevice    58.  6.100 / 58.  6.100
>   libavfilter     7. 43.100 /  7. 43.100
>   libswscale      5.  4.100 /  5.  4.100
>   libswresample   3.  4.100 /  3.  4.100
>   libpostproc    55.  4.100 / 55.  4.100
> [mpeg2video @ 0x2befc40] Invalid frame dimensions 0x0.
>     Last message repeated 13 times
> Input #0, rtp, from 'rtp://127.0.0.1:6000':
>   Duration: N/A, start: 51639.509822, bitrate: N/A
>   Program 493
>     Metadata:
>       service_name    : Clan
>       service_provider: RTVE
>     Stream #0:4: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002),
> yuv420p(tv, top first), 720x576 [SAR 64:45 DAR 16:9], 25 fps, 25 tbr, 90k
> tbn, 50 tbc
>     Stream #0:0(spa,spa,qaa): Subtitle: dvb_teletext ([6][0][0][0] / 0x0006)
>     Stream #0:1(spa): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo,
> s16p, 128 kb/s
>     Stream #0:3(qaa): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo,
> s16p, 128 kb/s
>     Stream #0:2(spa): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, mono,
> s16p, 96 kb/s (visual impaired) (descriptions)
>     Stream #0:5(spa): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
>     Stream #0:6(qaa): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
> Stream mapping:
>   Stream #0:4 -> #0:0 (mpeg2video (native) -> h264 (libx264))
>   Stream #0:2 -> #0:1 (mp2 (native) -> aac (native))
> Press [q] to stop, [?] for help
> [libx264 @ 0x2c50340] using SAR=64/45
> [libx264 @ 0x2c50340] using cpu capabilities: none!
> [libx264 @ 0x2c50340] profile High, level 3.0, 4:2:0, 8-bit
> [libx264 @ 0x2c50340] 264 - core 157 - H.264/MPEG-4 AVC codec - Copyleft
> 2003-2018 - 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=abr mbtree=1 bitrate=1500 ratetol=1.0
> qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
> Output #0, flv, to 'rtmp://encoder-cg10.bt.bcn.flumotion.net:1935/yuvod/clan
> ':
>   Metadata:
>     encoder         : Lavf58.22.100
>     Stream #0:0: Video: h264 (libx264) ([7][0][0][0] / 0x0007), yuv420p,
> 720x576 [SAR 64:45 DAR 16:9], q=-1--1, 1500 kb/s, 25 fps, 1k tbn, 25 tbc
>     Metadata:
>       encoder         : Lavc58.39.100 libx264
>     Side data:
>       cpb: bitrate max/min/avg: 0/0/1500000 buffer size: 0 vbv_delay: -1
>     Stream #0:1(spa): Audio: aac (LC) ([10][0][0][0] / 0x000A), 48000 Hz,
> stereo, fltp, 128 kb/s (visual impaired) (descriptions)
>     Metadata:
>       encoder         : Lavc58.39.100 aac
> [rtp @ 0x2b9ab40] max delay reached. need to consume packet
> bitrate=1458.5kbits/s speed=1.02x
> [rtp @ 0x2b9ab40] RTP: missed 13 packets

Can you try to record the network stream to allow us to reproduce?
Why is rtp input from the local system necessary?

Carl Eugen