Expression for scale filter trimmed

[Đonny]

Summary of the bug:
It looks like there is some limitation of maximum length of filter parameter for scale filter (or for all filters?). When I pass too long filter parameter FFmpeg complains about wrongs syntax. It seems that the length limitation is around 255 characters.
How to reproduce:
FFmpeg command line
(note: the command line is just an simple example how to reproduce the issue, in practice I'm trying to pass some quite complex expression for w:h of scale filer.)

D:\UGC testfiles\Video>ffmpeg -i D:\UGC\PendingUGC\c\c9\c9e9cf86-6598-409c-9cd1-879cb31622d0.mp4 -vf "yadif=0:-1:0, hqdn3d=1.5:1.5:6:6, scale=(00000000000000000
000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000480):(0000000000
000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000320), setsar=sar=1, fps=fps=25"
 -c:v libx264 -refs 5 -pix_fmt yuv420p -crf 25 -maxrate 300k -bufsize 1835k -profile:v baseline -preset fast -strict -2 -c:a aac -af "aformat=channel_layouts=mo
no|stereo" -ar 44100 -ab 32k -threads 3 -y -f mp4 o.mp4 -loglevel debug -report

(the input file must exist)
FFmpeg output

ffmpeg started on 2013-07-22 at 12:54:26
Report written to "ffmpeg-20130722-125426.log"
ffmpeg version N-54857-gf9f7f4c Copyright (c) 2000-2013 the FFmpeg developers
  built on Jul 21 2013 20:04:40 with gcc 4.7.3 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
eex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --
enable-libxvid --enable-zlib
  libavutil      52. 40.100 / 52. 40.100
  libavcodec     55. 18.102 / 55. 18.102
  libavformat    55. 12.102 / 55. 12.102
  libavdevice    55.  3.100 / 55.  3.100
  libavfilter     3. 81.102 /  3. 81.102
  libswscale      2.  4.100 /  2.  4.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  3.100 / 52.  3.100
Splitting the commandline.
Reading option '-i' ... matched as input file with argument 'D:\UGC\PendingUGC\c\c9\c9e9cf86-6598-409c-9cd1-879cb31622d0.mp4'.
Reading option '-vf' ... matched as option 'vf' (set video filters) with argument 'yadif=0:-1:0, hqdn3d=1.5:1.5:6:6, scale=(000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000480):(00000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000320), setsar=sar=1, fps=fps=25'.
Reading option '-c:v' ... matched as option 'c' (codec name) with argument 'libx264'.
Reading option '-refs' ... matched as AVOption 'refs' with argument '5'.
Reading option '-pix_fmt' ... matched as option 'pix_fmt' (set pixel format) with argument 'yuv420p'.
Reading option '-crf' ... matched as AVOption 'crf' with argument '25'.
Reading option '-maxrate' ... matched as AVOption 'maxrate' with argument '300k'.
Reading option '-bufsize' ... matched as AVOption 'bufsize' with argument '1835k'.
Reading option '-profile:v' ... matched as option 'profile' (set profile) with argument 'baseline'.
Reading option '-preset' ... matched as AVOption 'preset' with argument 'fast'.
Reading option '-strict' ... matched as AVOption 'strict' with argument '-2'.
Reading option '-c:a' ... matched as option 'c' (codec name) with argument 'aac'.
Reading option '-af' ... matched as option 'af' (set audio filters) with argument 'aformat=channel_layouts=mono|stereo'.
Reading option '-ar' ... matched as option 'ar' (set audio sampling rate (in Hz)) with argument '44100'.
Reading option '-ab' ... matched as AVOption 'ab' with argument '32k'.
Reading option '-threads' ... matched as AVOption 'threads' with argument '3'.
Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'mp4'.
Reading option 'o.mp4' ... matched as output file.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.
Reading option '-report' ... matched as option 'report' (generate a report) with argument '1'.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option y (overwrite output files) with argument 1.
Applying option loglevel (set logging level) with argument debug.
Applying option report (generate a report) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input file D:\UGC\PendingUGC\c\c9\c9e9cf86-6598-409c-9cd1-879cb31622d0.mp4.
Successfully parsed a group of options.
Opening an input file: D:\UGC\PendingUGC\c\c9\c9e9cf86-6598-409c-9cd1-879cb31622d0.mp4.
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000027df4c0] Format mov,mp4,m4a,3gp,3g2,mj2 probed with size=2048 and score=100
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000027df4c0] ISO: File Type Major Brand: isom
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000027df4c0] File position before avformat_find_stream_info() is 7105913
[h264 @ 00000000027dc900] no picture
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000027df4c0] All info found
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000027df4c0] File position after avformat_find_stream_info() is 16923
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'D:\UGC\PendingUGC\c\c9\c9e9cf86-6598-409c-9cd1-879cb31622d0.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf55.9.100
  Duration: 00:01:00.04, start: 0.036281, bitrate: 946 kb/s
    Stream #0:0(eng), 1, 1/11988: Video: h264 (High) (avc1 / 0x31637661), yuv420p, 720x480 [SAR 8:9 DAR 4:3], 50/2997, 810 kb/s, 29.97 fps, 29.97 tbr, 11988 tbn
, 59.94 tbc
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng), 1, 1/44100: Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s
    Metadata:
      handler_name    : SoundHandler
Successfully opened the file.
Parsing a group of options: output file o.mp4.
Applying option vf (set video filters) with argument yadif=0:-1:0, hqdn3d=1.5:1.5:6:6, scale=(000000000000000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000480):(00000000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000000320), setsar=sar=1, fps=fps=25.
Applying option c:v (codec name) with argument libx264.
Applying option pix_fmt (set pixel format) with argument yuv420p.
Applying option profile:v (set profile) with argument baseline.
Applying option c:a (codec name) with argument aac.
Applying option af (set audio filters) with argument aformat=channel_layouts=mono|stereo.
Applying option ar (set audio sampling rate (in Hz)) with argument 44100.
Applying option f (force format) with argument mp4.
Successfully parsed a group of options.
Opening an output file: o.mp4.
Successfully opened the file.
detected 8 logical cores
[Parsed_yadif_0 @ 00000000027db820] Setting 'mode' to value '0'
[Parsed_yadif_0 @ 00000000027db820] Setting 'parity' to value '-1'
[Parsed_yadif_0 @ 00000000027db820] Setting 'deint' to value '0'
[Parsed_hqdn3d_1 @ 000000000032a720] Setting 'luma_spatial' to value '1.5'
[Parsed_hqdn3d_1 @ 000000000032a720] Setting 'chroma_spatial' to value '1.5'
[Parsed_hqdn3d_1 @ 000000000032a720] Setting 'luma_tmp' to value '6'
[Parsed_hqdn3d_1 @ 000000000032a720] Setting 'chroma_tmp' to value '6'
[Parsed_hqdn3d_1 @ 000000000032a720] ls:1.500000 cs:1.500000 lt:6.000000 ct:6.000000
[Parsed_scale_2 @ 000000000033ed40] Setting 'w' to value '(00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
000000000000000000000000000000000000000000000000000000000000480)'
[Parsed_scale_2 @ 000000000033ed40] Setting 'h' to value '(000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'
[Parsed_scale_2 @ 000000000033ed40] w:(0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
0000000000000000000000000000000000000000480) h:(000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 flags:'bilinear' interl:
0
[Parsed_setsar_3 @ 0000000000372f40] Setting 'sar' to value '1'
[Parsed_fps_4 @ 0000000000373120] Setting 'fps' to value '25'
[Parsed_fps_4 @ 0000000000373120] fps=25/1
[graph 0 input from stream 0:0 @ 0000000000373620] Setting 'video_size' to value '720x480'
[graph 0 input from stream 0:0 @ 0000000000373620] Setting 'pix_fmt' to value '0'
[graph 0 input from stream 0:0 @ 0000000000373620] Setting 'time_base' to value '1/11988'
[graph 0 input from stream 0:0 @ 0000000000373620] Setting 'pixel_aspect' to value '8/9'
[graph 0 input from stream 0:0 @ 0000000000373620] Setting 'sws_param' to value 'flags=2'
[graph 0 input from stream 0:0 @ 0000000000373620] Setting 'frame_rate' to value '2997/100'
[graph 0 input from stream 0:0 @ 0000000000373620] w:720 h:480 pixfmt:yuv420p tb:1/11988 fr:2997/100 sar:8/9 sws_param:flags=2
[format @ 00000000003738c0] compat: called with args=[yuv420p]
[format @ 00000000003738c0] Setting 'pix_fmts' to value 'yuv420p'
[AVFilterGraph @ 0000000000342da0] query_formats: 8 queried, 7 merged, 0 already done, 0 delayed
[Parsed_scale_2 @ 000000000033ed40] [Eval @ 000000000022ab30] Missing ')' in '(000000000000000000000000000000000000000000000000000000000000000000000000000000000
000000'
Error when evaluating the expression '(000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'.
Maybe the expression for out_w:'(0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
0000000000000000000000000000000000480)' or for out_h:'(000000000000000000000000000000000000000000000000000000000000000000000000000000000000000' is self-referenc
ing.
[Parsed_scale_2 @ 000000000033ed40] Failed to configure output pad on Parsed_scale_2
Error opening filters!
[Parsed_fps_4 @ 0000000000373120] 0 frames in, 0 frames out; 0 frames dropped, 0 frames duplicated.
[AVIOContext @ 000000000033bec0] Statistics: 0 seeks, 0 writeouts
[AVIOContext @ 00000000027dfa40] Statistics: 130709 bytes read, 2 seeks

[Carl Eugen Hoyos]

Is this not reproducible with current git head?

[Đonny]

Replying to cehoyos:

Is this not reproducible with current git head?

I'm not sure. I have problems building FFmpeg on Windows :-(. I'm using Zeranoe FFmpeg builds for Windows and I can replicate it with build git-f9f7f4c (x64, static) from 2013-07-21 (yesterday). I've also tried Linux build N-54234-gef90639 from 2013-06-28 with same effect.
It the issue is expected to be fixed recently I can try it again tomorrow with latest Zeranoe build.

[Carl Eugen Hoyos]

Replying to Đonny:

Replying to cehoyos:

Is this not reproducible with current git head?

I'm not sure. I have problems building FFmpeg on Windows :-(

Anything that can be fixed?

I'm using Zeranoe FFmpeg builds for Windows and I can replicate it with build git-f9f7f4c (x64, static) from 2013-07-21 (yesterday).

Yesterday is usually new enough.

It the issue is expected to be fixed recently I can try it again tomorrow with latest Zeranoe build.

No, I was just surprised why you set "Version" to 2,0.

[Đonny]

Replying to cehoyos:

Anything that can be fixed?

I guess it can be fixed when I spend a day on it. I'm not very familiar with MSYS etc.

No, I was just surprised why you set "Version" to 2,0.

Sorry, I didn't realize there's git-master version, I thought 2.0 is the latest.

[Michael Niedermayer]

Fixed in 61af627d56c785650ac3d235f6356ee3bc5676ee