[FFmpeg-trac] #5642(undetermined:new): Qmin Qmax with MPEG2 Encoding

FFmpeg trac at avcodec.org
Wed Jun 15 10:00:43 CEST 2016 

#5642: Qmin Qmax with MPEG2 Encoding
-------------------------------------+-------------------------------------
             Reporter:               |                    Owner:
  smallishzulu                       |                   Status:  new
                 Type:  defect       |                Component:
             Priority:  normal       |  undetermined
              Version:  unspecified  |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by smallishzulu):

 Sorry for my late reply. I was travelling.

 Command line:
 ffmpeg -i /tmp/ada.ts -vcodec mpeg2video -minrate 1000k -maxrate 1000k -vb
 1000k -bufsize 1000k -acodec mp2 -ac 2 -ab 128k -f mpets -muxrate 1300k -y
 /tmp/out.ts

 Case:

 Bitrate actually is too low for given resolution and FFmpeg use qmax value
 31 as default, by this setup warning message "[mpeg2video @ 0xe4ba9f20]
 max bitrate possibly too small or try trellis with large lmax or increase
 qmax" is given out. So I tried to set qmax to 51 to have output without
 "dts < pcr, TS is invalid" error. Only way to do it, as far af I know, is
 to make lower quality video on output by increasing qmax value. Than I
 noticed that qmin and qmax does not work for mpeg2video codec.

 Log:

 ffmpeg version N-80335-gcb46b78 Copyright (c) 2000-2016 the FFmpeg
 developers
   built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
   configuration: --prefix=/opt/ffmpeg --enable-static --disable-shared
 --enable-nonfree --enable-gpl --extra-cflags='-I/opt/ffmpeg/include
 -I/usr/local/include' --extra-ldflags=-L/opt/ffmpeg/lib
 --bindir=/opt/ffmpeg/bin --extra-libs=-ldl --enable-libx264 --enable-
 nonfree --enable-gpl --enable-nvenc --enable-vdpau --enable-libzvbi
 --enable-libfdk-aac --enable-libmfx --enable-libzimg
   libavutil      55. 24.100 / 55. 24.100
   libavcodec     57. 46.100 / 57. 46.100
   libavformat    57. 38.100 / 57. 38.100
   libavdevice    57.  0.101 / 57.  0.101
   libavfilter     6. 46.101 /  6. 46.101
   libswscale      4.  1.100 /  4.  1.100
   libswresample   2.  1.100 /  2.  1.100
   libpostproc    54.  0.100 / 54.  0.100
 [h264 @ 0xe4b810e0] SPS unavailable in decode_picture_timing
 [h264 @ 0xe4b810e0] non-existing PPS 0 referenced
 [h264 @ 0xe4b810e0] SPS unavailable in decode_picture_timing
 [h264 @ 0xe4b810e0] non-existing PPS 0 referenced
 [h264 @ 0xe4b810e0] decode_slice_header error
 [h264 @ 0xe4b810e0] non-existing PPS 0 referenced
 [h264 @ 0xe4b810e0] decode_slice_header error
 [h264 @ 0xe4b810e0] no frame!
 [h264 @ 0xe4b810e0] SPS unavailable in decode_picture_timing
 [h264 @ 0xe4b810e0] non-existing PPS 0 referenced
 [h264 @ 0xe4b810e0] SPS unavailable in decode_picture_timing
 [h264 @ 0xe4b810e0] non-existing PPS 0 referenced
 [h264 @ 0xe4b810e0] decode_slice_header error
 [h264 @ 0xe4b810e0] non-existing PPS 0 referenced
 [h264 @ 0xe4b810e0] decode_slice_header error
 [h264 @ 0xe4b810e0] no frame!
 [h264 @ 0xe4b810e0] SPS unavailable in decode_picture_timing
 [h264 @ 0xe4b810e0] non-existing PPS 0 referenced
 [h264 @ 0xe4b810e0] decode_slice_header error
 [h264 @ 0xe4b810e0] non-existing PPS 0 referenced
 [h264 @ 0xe4b810e0] decode_slice_header error
 [h264 @ 0xe4b810e0] no frame!
 [h264 @ 0xe4b810e0] SPS unavailable in decode_picture_timing
 [h264 @ 0xe4b810e0] non-existing PPS 0 referenced
 [h264 @ 0xe4b810e0] SPS unavailable in decode_picture_timing
 [h264 @ 0xe4b810e0] non-existing PPS 0 referenced
 [h264 @ 0xe4b810e0] decode_slice_header error
 [h264 @ 0xe4b810e0] non-existing PPS 0 referenced
 [h264 @ 0xe4b810e0] decode_slice_header error
 [h264 @ 0xe4b810e0] no frame!
 [h264 @ 0xe4b810e0] Increasing reorder buffer to 2
 [mpegts @ 0xe4b7c6a0] PES packet size mismatch
 Input #0, mpegts, from '/tmp/ada.ts':
   Duration: 00:00:33.82, start: 21827.579833, bitrate: 5876 kb/s
   Program 1
     Stream #0:0[0x121]: Video: h264 (Main) ([27][0][0][0] / 0x001B),
 yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 50 tbr, 90k tbn, 50 tbc
     Stream #0:1[0x131](tur): Audio: aac (HE-AAC) ([15][0][0][0] / 0x000F),
 48000 Hz, stereo, fltp, 127 kb/s
 [mpeg2video @ 0xe4ba9f20] Warning vbv_delay will be set to 0xFFFF (=VBR)
 as the specified vbv buffer is too large for the given bitrate!
 [mpegts @ 0xe4b83a20] Using AVStream.codec to pass codec parameters to
 muxers is deprecated, use AVStream.codecpar instead.
     Last message repeated 1 times
 Output #0, mpegts, to '/tmp/out.ts':
   Metadata:
     encoder         : Lavf57.38.100
     Stream #0:0: Video: mpeg2video (Main), yuv420p, 1920x1080 [SAR 1:1 DAR
 16:9], q=2-31, 1000 kb/s, 25 fps, 90k tbn, 25 tbc
     Metadata:
       encoder         : Lavc57.46.100 mpeg2video
     Side data:
       cpb: bitrate max/min/avg: 1000000/1000000/1000000 buffer size:
 1000000 vbv_delay: -1
     Stream #0:1(tur): Audio: mp2, 48000 Hz, stereo, s16, 128 kb/s
     Metadata:
       encoder         : Lavc57.46.100 mp2
 Stream mapping:
   Stream #0:0 -> #0:0 (h264 (native) -> mpeg2video (native))
   Stream #0:1 -> #0:1 (aac (native) -> mp2 (native))
 Press [q] to stop, [?] for help
 frame=    0 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A
 speed=   0x
 [h264 @ 0xe4bc1fa0] reference picture missing during reorder
 [h264 @ 0xe4bc1fa0] Missing reference picture, default is 65589
 [h264 @ 0xe4bc1fa0] reference picture missing during reorder
 [h264 @ 0xe4bc1fa0] Missing reference picture, default is 65589
 [h264 @ 0xe4c11000] mmco: unref short failure
 [h264 @ 0xe4c47b80] mmco: unref short failure
 [h264 @ 0xe4c63180] mmco: unref short failure
 [h264 @ 0xe4c11000] mmco: unref short failure
 [aac @ 0xe4b83260] Number of bands (14) exceeds limit (13).
 Error while decoding stream #0:1: Invalid data found when processing input
 [mpegts @ 0xe4b83a20] Non-monotonous DTS in output stream 0:1; previous:
 20218, current: 18538; changing to 20219. This may result in incorrect
 timestamps in the output file.
 frame=    0 fps=0.0 q=0.0 size=       0kB time=00:00:00.37 bitrate=
 0.0kbits/s speed=0.371x
 frame=    0 fps=0.0 q=0.0 size=       0kB time=00:00:00.78 bitrate=
 0.0kbits/s speed=0.517x
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 frame=    4 fps=1.9 q=31.6 size=     161kB time=00:00:01.72 bitrate=
 767.7kbits/s speed=0.832x
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 frame=   21 fps=8.2 q=31.0 size=     391kB time=00:00:02.40
 bitrate=1333.5kbits/s speed=0.933x
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpegts @ 0xe4b83a20] dts < pcr, TS is invalid
     Last message repeated 4 times
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpegts @ 0xe4b83a20] dts < pcr, TS is invalid
     Last message repeated 29 times
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 frame=   34 fps= 11 q=31.0 size=     542kB time=00:00:02.92
 bitrate=1519.4kbits/s speed=0.949x
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpegts @ 0xe4b83a20] dts < pcr, TS is invalid
     Last message repeated 20 times
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpegts @ 0xe4b83a20] dts < pcr, TS is invalid
     Last message repeated 33 times
 frame=   46 fps= 13 q=31.0 size=     723kB time=00:00:03.40
 bitrate=1741.1kbits/s speed=0.95x
 [mpegts @ 0xe4b83a20] dts < pcr, TS is invalid
     Last message repeated 22 times
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpegts @ 0xe4b83a20] dts < pcr, TS is invalid
     Last message repeated 29 times
 frame=   59 fps= 14 q=31.0 size=     896kB time=00:00:03.92
 bitrate=1873.1kbits/s speed=0.958x
 [mpegts @ 0xe4b83a20] dts < pcr, TS is invalid
     Last message repeated 7 times
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpegts @ 0xe4b83a20] dts < pcr, TS is invalid
     Last message repeated 7 times
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpegts @ 0xe4b83a20] dts < pcr, TS is invalid
     Last message repeated 25 times
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 frame=   72 fps= 16 q=31.0 size=    1038kB time=00:00:04.44
 bitrate=1915.2kbits/s speed=0.967x
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpegts @ 0xe4b83a20] dts < pcr, TS is invalid
     Last message repeated 7 times
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpegts @ 0xe4b83a20] dts < pcr, TS is invalid
     Last message repeated 25 times
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 frame=   84 fps= 16 q=31.0 size=    1153kB time=00:00:04.92
 bitrate=1920.3kbits/s speed=0.964x
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpegts @ 0xe4b83a20] dts < pcr, TS is invalid
     Last message repeated 40 times
 frame=   97 fps= 17 q=31.0 size=    1286kB time=00:00:05.44
 bitrate=1936.1kbits/s speed=0.97x
 [mpegts @ 0xe4b83a20] dts < pcr, TS is invalid
     Last message repeated 10 times
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpegts @ 0xe4b83a20] dts < pcr, TS is invalid
     Last message repeated 28 times
 frame=  109 fps= 18 q=31.0 size=    1427kB time=00:00:05.92
 bitrate=1974.0kbits/s speed=0.968x
 [mpegts @ 0xe4b83a20] dts < pcr, TS is invalid
     Last message repeated 3 times
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpegts @ 0xe4b83a20] dts < pcr, TS is invalid
     Last message repeated 22 times
 [mpeg2video @ 0xe4ba9f20] rc buffer underflow
 [mpeg2video @ 0xe4ba9f20] max bitrate possibly too small or try trellis
 with large lmax or increase qmax
 [mpegts @ 0xe4b83a20] dts < pcr, TS is invalid
     Last message repeated 55 times
 frame=  121 fps= 18 q=31.0 Lsize=    1691kB time=00:00:06.44
 bitrate=2151.1kbits/s speed=0.961x
 video:1280kB audio:89kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 23.530687%
 Exiting normally, received signal 2.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5642#comment:2>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker

More information about the FFmpeg-trac mailing list