[FFmpeg-trac] #732(undetermined:new): Storing variables not working in expressions
FFmpeg
trac at avcodec.org
Sat Dec 10 20:31:30 CET 2011
#732: Storing variables not working in expressions
-------------------------------------+-------------------------------------
Reporter: jworrall | Type: defect
Status: new | Priority: normal
Component: | Version:
undetermined | unspecified
Keywords: expression | Blocked By:
evaluation | Reproduced by developer: 0
Blocking: |
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Storing a variable does not allow it to be retrieved:
-vf "scale = st(0\,1) * 640 : ld(0) * 480"
The first function, st(0,1), evaluates to 1, and the output file has a
width of 640.
The second function, ld(0), apparently evaluates to 0, and the output
retains its original height.
My understanding is that ld(0) should reload var 0 with a value of 1.
Following is a typical complete command line and full output. Problem is
not limited to one input file:
ffmpeg -i kit.mov -t 3 -c:v libx264 \
-vf "scale = st(0\,1) * 640 : ld(0) * 480" \
-vprofile main -preset veryslow -x264opts level=3.1:ref=8 -c:a
libvo_aacenc -y output.m4v
ffmpeg version 0.8.7.git-337ce55, Copyright (c) 2000-2011 the FFmpeg
developers
built on Dec 10 2011 09:35:29 with clang 3.0 (tags/Apple/clang-211.12)
configuration: --prefix=/Volumes/Ramdisk/sw --cc=clang --enable-gpl
--enable-version3 --arch=x86_64 --enable-hardcoded-tables --disable-indevs
--enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libvo-
aacenc --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame
--enable-libx264 --enable-libvorbis --enable-libtheora --enable-libspeex
--disable-ffserver
libavutil 51. 32. 0 / 51. 32. 0
libavcodec 53. 42. 0 / 53. 42. 0
libavformat 53. 24. 0 / 53. 24. 0
libavdevice 53. 4. 0 / 53. 4. 0
libavfilter 2. 52. 0 / 2. 52. 0
libswscale 2. 1. 0 / 2. 1. 0
libpostproc 51. 2. 0 / 51. 2. 0
Seems stream 0 codec frame rate differs from container frame rate: 1200.00
(1200/1) -> 29.97 (30000/1001)
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'kit.mov':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
creation_time : 2011-05-08 00:51:03
Duration: 00:01:21.61, start: 0.000000, bitrate: 10723 kb/s
Stream #0:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p,
1280x720, 10655 kb/s, 29.81 fps, 29.97 tbr, 600 tbn, 1200 tbc
Metadata:
creation_time : 2011-05-08 00:51:03
handler_name :
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, s16,
63 kb/s
Metadata:
creation_time : 2011-05-08 00:51:03
handler_name : ?Apple Alias Data Handler
[buffer @ 0x7fb642c165a0] w:1280 h:720 pixfmt:yuv420p tb:1/1000000 sar:0/1
sws_param:
[scale @ 0x7fb642c1fdc0] w:1280 h:720 fmt:yuv420p -> w:640 h:720
fmt:yuv420p flags:0x4
[libx264 @ 0x7fb643031800] using cpu capabilities: MMX2 SSE2Fast SSSE3
FastShuffle SSE4.2
[libx264 @ 0x7fb643031800] profile Main, level 3.1
[libx264 @ 0x7fb643031800] 264 - core 120 - H.264/MPEG-4 AVC codec -
Copyleft 2003-2011 - http://www.videolan.org/x264.html - options: cabac=1
ref=8 deblock=1:0:0 analyse=0x1:0x131 me=umh subme=10 psy=1
psy_rd=1.00:0.00 mixed_ref=1 me_range=24 chroma_me=1 trellis=2 8x8dct=0
cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6
sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0
constrained_intra=0 bframes=8 b_pyramid=2 b_adapt=2 b_bias=0 direct=3
weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40
intra_refresh=0 rc_lookahead=60 rc=crf mbtree=1 crf=23.0 qcomp=0.60
qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, ipod, to 'output.m4v':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
creation_time : 2011-05-08 00:51:03
encoder : Lavf53.24.0
Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p, 640x720,
q=-1--1, 30k tbn, 29.97 tbc
Metadata:
creation_time : 2011-05-08 00:51:03
handler_name :
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, s16,
128 kb/s
Metadata:
creation_time : 2011-05-08 00:51:03
handler_name : ?Apple Alias Data Handler
Stream mapping:
Stream #0:0 -> #0:0 (h264 -> libx264)
Stream #0:1 -> #0:1 (aac -> libvo_aacenc)
Press [q] to stop, [?] for help
frame= 90 fps= 12 q=-1.0 Lsize= 206kB time=00:00:02.93 bitrate=
574.6kbits/s
video:154kB audio:47kB global headers:0kB muxing overhead 2.113484%
[libx264 @ 0x7fb643031800] frame I:1 Avg QP:24.70 size: 14288
[libx264 @ 0x7fb643031800] frame P:17 Avg QP:25.77 size: 4099
[libx264 @ 0x7fb643031800] frame B:72 Avg QP:30.15 size: 1021
[libx264 @ 0x7fb643031800] consecutive B-frames: 1.1% 0.0% 0.0% 13.3%
44.4% 33.3% 7.8% 0.0% 0.0%
[libx264 @ 0x7fb643031800] mb I I16..4: 51.5% 0.0% 48.5%
[libx264 @ 0x7fb643031800] mb P I16..4: 1.7% 0.0% 1.3% P16..4: 41.2%
7.2% 9.9% 0.1% 0.0% skip:38.6%
[libx264 @ 0x7fb643031800] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 43.1%
1.8% 0.2% direct: 0.3% skip:54.5% L0:43.0% L1:55.7% BI: 1.3%
[libx264 @ 0x7fb643031800] direct mvs spatial:94.4% temporal:5.6%
[libx264 @ 0x7fb643031800] coded y,uvDC,uvAC intra: 43.6% 34.0% 12.2%
inter: 1.6% 2.1% 0.0%
[libx264 @ 0x7fb643031800] i16 v,h,dc,p: 50% 5% 6% 39%
[libx264 @ 0x7fb643031800] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 30% 2% 15% 9%
14% 10% 8% 7% 5%
[libx264 @ 0x7fb643031800] i8c dc,h,v,p: 44% 21% 27% 8%
[libx264 @ 0x7fb643031800] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x7fb643031800] ref P L0: 50.3% 14.3% 17.2% 5.4% 4.5% 3.1%
3.4% 1.8%
[libx264 @ 0x7fb643031800] ref B L0: 82.3% 10.1% 4.4% 1.7% 0.8% 0.5%
0.2%
[libx264 @ 0x7fb643031800] ref B L1: 89.7% 10.3%
[libx264 @ 0x7fb643031800] kb/s:419.56
localhost:Desktop jim$
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/732>
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