[FFmpeg-trac] #5663(undetermined:new): cannot transcode flv (cannot find video stream)

FFmpeg trac at avcodec.org
Fri Jun 24 11:08:47 CEST 2016


#5663: cannot transcode flv (cannot find video stream)
-------------------------------------+-------------------------------------
             Reporter:  orz-         |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:  flv          |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 I am trying to transcode from streaming captured flv(avc+aac) video to
 mp4(avc+aac) format,
 with original Latest Zeranoe FFmpeg Build Version: 6935aaa
 (2016-06-24)(windows binary of https://ffmpeg.zeranoe.com/builds/) , but
 cannot find video stream ,instead found subtitle stream.
 Our(Saccubus team) modified ffmpeg
 (http://ci.ledyba.org/job/SaccubusFFmpegBuild_1.x/lastSuccessfulBuild/artifact/ffmpeg_1.x_20160624_075650.7z)
 does the same.
 The sample flv file may be broken nevertheless it can be viewed by MPC-HC
 x64 Windows application (verison and property info is
 mpchc64_OK_version.txt)
 I am not sure this is bug.

 Command line:(on msys2 MinGW-w64 32bit - Windows 10)
 How to reproduce:
 {{{
 % "C:\\msys64\\usr\\local\\src\\ffmpeg_bug_report\\0624\\ffmpeg.exe" -y -i
 sample_flvrepair100.flv -q:v 0 -s 640x360 out.mp4
 ffmpeg version N-80615-g6935aaa Copyright (c) 2000-2016 the FFmpeg
 developers
   built with gcc 5.4.0 (GCC)
   configuration: --enable-gpl --enable-version3 --disable-w32threads
 --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-libopenjpeg --enable-libopus --enable-
 librtmp --enable-libschroedinger --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. 26.100 / 55. 26.100
   libavcodec     57. 46.100 / 57. 46.100
   libavformat    57. 40.101 / 57. 40.101
   libavdevice    57.  0.101 / 57.  0.101
   libavfilter     6. 46.102 /  6. 46.102
   libswscale      4.  1.100 /  4.  1.100
   libswresample   2.  1.100 /  2.  1.100
   libpostproc    54.  0.100 / 54.  0.100
 Splitting the commandline.
 Reading option '-y' ... matched as option 'y' (overwrite output files)
 with argument '1'.
 Reading option '-i' ... matched as input file with argument
 'sample_flvrepair100.flv'.
 Reading option '-q:v' ... matched as option 'q' (use fixed quality scale
 (VBR)) with argument '0'.
 Reading option '-s' ... matched as option 's' (set frame size (WxH or
 abbreviation)) with argument '640x360'.
 Reading option 'out.mp4' ... matched as output file.
 Finished splitting the commandline.
 Parsing a group of options: global .
 Applying option y (overwrite output files) with argument 1.
 Successfully parsed a group of options.
 Parsing a group of options: input file sample_flvrepair100.flv.
 Successfully parsed a group of options.
 Opening an input file: sample_flvrepair100.flv.
 [file @ 03c09500] Setting default whitelist 'file,crypto'
 [flv @ 03c08de0] Format flv probed with size=2048 and score=100
 [flv @ 03c08de0] Before avformat_find_stream_info() pos: 13 bytes
 read:32768 seeks:0 nb_streams:0
 [flv @ 03c08de0] audio stream discovered after head already parsed
 [flv @ 03c08de0] subtitle stream discovered after head already parsed
 [flv @ 03c08de0] max_analyze_duration 5000000 reached at 5014000
 microseconds st:0
 [flv @ 03c08de0] After avformat_find_stream_info() pos: 49702 bytes
 read:98308 seeks:2 frames:221
 Input #0, flv, from 'sample_flvrepair100.flv':
   Metadata:
     moovPosition    : 36
     avcprofile      : 100
     avclevel        : 30
     aacaot          : 2
     videoframerate  : 28
     audiochannels   : 2
     sampletype      : mp4a
     length          : 3984381
     timescale       : 1000
   Duration: 01:06:24.41, start: 2.322000, bitrate: 284 kb/s
     Stream #0:0, 220, 1/1000: Audio: aac, 44100 Hz, stereo, fltp
     Stream #0:1, 1, 1/1000: Subtitle: text
 Successfully opened the file.
 Parsing a group of options: output file out.mp4.
 Applying option q:v (use fixed quality scale (VBR)) with argument 0.
 Applying option s (set frame size (WxH or abbreviation)) with argument
 640x360.
 Successfully parsed a group of options.
 Opening an output file: out.mp4.
 [file @ 03222b00] Setting default whitelist 'file,crypto'
 Successfully opened the file.
 detected 8 logical cores
 [graph 0 input from stream 0:0 @ 0323fae0] Setting 'time_base' to value
 '1/44100'
 [graph 0 input from stream 0:0 @ 0323fae0] Setting 'sample_rate' to value
 '44100'
 [graph 0 input from stream 0:0 @ 0323fae0] Setting 'sample_fmt' to value
 'fltp'
 [graph 0 input from stream 0:0 @ 0323fae0] Setting 'channel_layout' to
 value '0x3'
 [graph 0 input from stream 0:0 @ 0323fae0] tb:1/44100 samplefmt:fltp
 samplerate:44100 chlayout:0x3
 [audio format for output stream 0:0 @ 0323fa60] Setting 'sample_fmts' to
 value 'fltp'
 [audio format for output stream 0:0 @ 0323fa60] Setting 'sample_rates' to
 value
 '96000|88200|64000|48000|44100|32000|24000|22050|16000|12000|11025|8000|7350'
 [AVFilterGraph @ 032375e0] query_formats: 4 queried, 9 merged, 0 already
 done, 0 delayed
 [mp4 @ 03233a20] Using AVStream.codec to pass codec parameters to muxers
 is deprecated, use AVStream.codecpar instead.
 Output #0, mp4, to 'out.mp4':
   Metadata:
     moovPosition    : 36
     avcprofile      : 100
     avclevel        : 30
     aacaot          : 2
     videoframerate  : 28
     audiochannels   : 2
     sampletype      : mp4a
     length          : 3984381
     timescale       : 1000
     encoder         : Lavf57.40.101
     Stream #0:0, 0, 1/44100: Audio: aac (LC) ([64][0][0][0] / 0x0040),
 44100 Hz, stereo, fltp, 128 kb/s
     Metadata:
       encoder         : Lavc57.46.100 aac
 Stream mapping:
   Stream #0:0 -> #0:0 (aac (native) -> aac (native))
 Press [q] to stop, [?] for help
 cur_dts is invalid (this is harmless if it occurs once at the start per
 stream)
 cur_dts is invalid (this is harmless if it occurs once at the start per
 stream)
 [flv @ 03c08de0] video stream discovered after head already parsed
 [NULL @ 03206ac0] nal_unit_type: 7, nal_ref_idc: 3
 [NULL @ 03206ac0] nal_unit_type: 8, nal_ref_idc: 3
 [flv @ 03c08de0] New (null) stream 0:2 at pos:60653 and DTS:8.627s
 size=     191kB time=00:00:12.19 bitrate= 128.5kbits/s speed=24.3x
 size=     405kB time=00:00:25.79 bitrate= 128.6kbits/s speed=25.8x
                                    (*snip*)
 size=   56205kB time=00:59:09.23 bitrate= 129.7kbits/s speed=23.5x
 [aac @ 03230da0] decode_band_types: Input buffer exhausted before END
 element found
 Error while decoding stream #0:0: Invalid data found when processing input
 [output stream 0:0 @ 0323fbe0] EOF on sink link output stream 0:0:default.
 No more output streams to write to, finishing.
 size=   56998kB time=00:59:21.33 bitrate= 131.1kbits/s speed=23.5x
 video:0kB audio:56397kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 1.065180%
 Input file #0 (sample_flvrepair100.flv):
   Input stream #0:0 (audio): 153375 packets read (40624776 bytes); 153374
 frames decoded (157054976 samples);
   Input stream #0:1 (subtitle): 1 packets read (515 bytes);
   Total: 153376 packets (40625291 bytes) demuxed
 Output file #0 (out.mp4):
   Output stream #0:0 (audio): 153374 frames encoded (157054976 samples);
 153375 packets muxed (57750330 bytes);
   Total: 153375 packets (57750330 bytes) muxed
 153374 frames successfully decoded, 1 decoding errors
 [AVIOContext @ 03c004e0] Statistics: 30 seeks, 153416 writeouts
 [aac @ 0323bae0] Qavg: 2100.247
 [AVIOContext @ 03208080] Statistics: 141830040 bytes read, 2 seeks

 }}}

 sample is https://www.datafilehost.com/d/3abf78e9

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5663>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker


More information about the FFmpeg-trac mailing list