0

Locally, from my windows machine with ffmpeg 3.3.2 from Zeranoe (same result with 4.0.2)

ffmpeg version 3.2.2 Copyright (c) 2003-2016 the FFmpeg developers built with gcc 5.4.0 (GCC) configuration: --enable-gpl --enable-version3 --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib

Server side

Launch udp multicast streaming.

ffmpeg -re -i video.ts -an -f mpegts -c copy udp://224.1.1.1:5000

Client side

Playing with ffplay is correct, no artifacts displayed, video is smooth

ffplay udp://224.1.1.1:5000

Playing after decoding cause artifacts, video is corrupted

ffmpeg -i udp://224.1.1.1:5000 -pix_fmt gray -f avi - | ffplay -

or

ffmpeg -f mpegts -i udp://224.1.1.1:5000 -pix_fmt gray -c:v rawvideo -f avi out.avi

Does someone has an explanation?

Here is the output of the FFmpeg console:

ffmpeg version 3.2.2 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 5.4.0 (GCC)
  configuration: --enable-gpl --enable-version3 --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
  libavutil      55. 34.100 / 55. 34.100
  libavcodec     57. 64.101 / 57. 64.101
  libavformat    57. 56.100 / 57. 56.100
  libavdevice    57.  1.100 / 57.  1.100
  libavfilter     6. 65.100 /  6. 65.100
  libswscale      4.  2.100 /  4.  2.100
  libswresample   2.  3.100 /  2.  3.100
  libpostproc    54.  1.100 / 54.  1.100
[h264 @ 0000000000c23f40] Invalid NAL unit 1, skipping.
[h264 @ 0000000000c23f40] cabac decode of qscale diff failed at 52 23
[h264 @ 0000000000c23f40] error while decoding MB 52 22, bytestream -16
[h264 @ 0000000000c23f40] concealing 5517 DC, 5517 AC, 5517 MV errors in P frame
[h264 @ 0000000000c23f40] Invalid NAL unit 1, skipping.
[h264 @ 0000000000c23f40] concealing 6939 DC, 6939 AC, 6939 MV errors in B frame
Input #0, mpegts, from 'udp://224.1.1.1:5000':
  Duration: N/A, start: 1.520000, bitrate: N/A
  Program 1
    Metadata:
      service_name    : Service01
      service_provider: FFmpeg
    Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(tv, bt709, top first), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc
File 'out.avi' already exists. Overwrite ? [y/N] y
Output #0, avi, to 'out.avi':
  Metadata:
    ISFT            : Lavf57.56.100
    Stream #0:0: Video: rawvideo (Y800 / 0x30303859), gray, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc
    Metadata:
      encoder         : Lavc57.64.101 rawvideo
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> rawvideo (native))
Press [q] to stop, [?] for help
[h264 @ 0000000000c330e0] Invalid NAL unit 0, skipping.
[h264 @ 0000000003ba8260] Invalid NAL unit 0, skipping.
[h264 @ 0000000003ba8260] concealing 6939 DC, 6939 AC, 6939 MV errors in B frame
[h264 @ 0000000000c330e0] cabac decode of qscale diff failed at 52 23
[h264 @ 0000000000c330e0] error while decoding MB 52 22, bytestream -16
[h264 @ 0000000000c330e0] concealing 5517 DC, 5517 AC, 5517 MV errors in P frame
[h264 @ 0000000005990380] Invalid NAL unit 1, skipping.
[h264 @ 0000000000c32c40] Reference 2 >= 2
[h264 @ 0000000000c32c40] error while decoding MB 56 22, bytestream 503
[h264 @ 0000000000c32c40] concealing 5513 DC, 5513 AC, 5513 MV errors in B frame
[h264 @ 0000000005990380] error while decoding MB 14 64, bytestream -10
[h264 @ 0000000005990380] concealing 515 DC, 515 AC, 515 MV errors in P frame
[h264 @ 0000000003ba8260] Invalid NAL unit 6, skipping.2.68 bitrate=402359.1kbits/s speed=5.31x
[h264 @ 0000000003ba8260] error while decoding MB 81 34, bytestream -10
[h264 @ 0000000003ba8260] concealing 4048 DC, 4048 AC, 4048 MV errors in P frame
[h264 @ 0000000003ba8b00] Reference 2 >= 2
[h264 @ 0000000003ba8b00] error while decoding MB 7 0, bytestream 72352
[h264 @ 0000000003ba8b00] concealing 8160 DC, 8160 AC, 8160 MV errors in P frame
[h264 @ 000000000599a860] Invalid NAL unit 0, skipping.
[h264 @ 000000000599a860] error while decoding MB 68 18, bytestream -25147.9kbits/s speed=4.75x
[h264 @ 000000000599a860] concealing 5981 DC, 5981 AC, 5981 MV errors in I frame
[h264 @ 00000000056c8f00] Reference 2 >= 2
[h264 @ 00000000056c8f00] error while decoding MB 94 10, bytestream 2535
[h264 @ 00000000056c8f00] concealing 6915 DC, 6915 AC, 6915 MV errors in B frame
[h264 @ 0000000000c32c40] Invalid NAL unit 1, skipping.
[h264 @ 0000000000c32c40] error while decoding MB 73 24, bytestream -10
[h264 @ 0000000000c32c40] concealing 5256 DC, 5256 AC, 5256 MV errors in P frame
[h264 @ 0000000000c330e0] Reference 3 >= 2
[h264 @ 0000000000c330e0] error while decoding MB 30 16, bytestream 1562
[h264 @ 0000000000c330e0] concealing 6259 DC, 6259 AC, 6259 MV errors in B frame
[h264 @ 0000000003ba8b00] Invalid NAL unit 0, skipping.8.56 bitrate=267443.2kbits/s speed=5.44x
[h264 @ 0000000003ba8b00] error while decoding MB 1 16, bytestream -15
[h264 @ 0000000003ba8b00] concealing 6288 DC, 6288 AC, 6288 MV errors in I frame
  • 1
    Welcome to Super User! A small note: ffmpeg 3.3.2 is quite old, it's advisable to use an up-to-date build. Please also share the full, uncut console output of the ffmpeg command you are having trouble with. Thanks! – bertieb Aug 17 '18 at 10:07
  • Welcome to Super User! Apparently you have two Super User accounts: user934789 and Nicosmik. This will interfere with commenting, editing your own posts, and accepting an answer. Please take the time to utilise this Help Center tutorial and ask the Super User staff to merge your accounts. – robinCTS Aug 21 '18 at 12:50
  • it's done and I updated the page with more details – Nicosmik Aug 22 '18 at 8:01
0

I had the same behavior, and I don't know why it happens, but I solved it by writing a custom player. The code is included in my answer on SO.

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