[FFmpeg-user] shuffleframes -- unexpected results
pdr0
pdr0 at shaw.ca
Mon Feb 22 05:59:32 EET 2021
Mark Filipak (ffmpeg) wrote
> On 2021-02-21 21:39, pdr0 wrote:
>> Mark Filipak (ffmpeg) wrote
>>> I've run some test cases for the shuffleframes filter. I've documented
>>> shuffleframes via my
>>> preferred documentation format (below). In the course of my testing, I
>>> found 2 cases (marked "*****
>>> Expected", below) that produced unexpected results, to wit: If the 1st
>>> frame is discarded, the
>>> entire input is discarded, even if the 1st discard is followed by frames
>>> that are supposed to be
>>> retained.
>>>
>>> -1 1 ...Blocks the pipeline (discards all frames).
>>> *****
>>> Expected 1 3 5 7 ..
>>> -1 1 2 ...Blocks the pipeline (discards all frames).
>>> ***** Expected 1 2 4 5 7 8 ..
>>
>> These 2 cases produce the expected result for me
>>
>> If the "entire input is discarded" - do you mean you get no output file
>> at
>> all ?
>
> No output file at all. The transcodes complete (they don't hang awaiting
> end-of-stream) but since
> the pipeline contains no frames, the encoder makes nothing and ffmpeg
> makes no files.
>
>> Post more info, including the console log
>
> First, for context, the scripts:
> ffmpeg -i 0.mkv -vf shuffleframes="-1" -dn "\-1.mkv"
> ffmpeg -i 0.mkv -vf shuffleframes="-1 1" -dn "\-1 1.mkv"
> ffmpeg -i 0.mkv -vf shuffleframes="-1 1 2" -dn "\-1 1 2.mkv"
>
> I had to escape the '-' in the filenames in order to avoid this complaint:
> "Unrecognized option '1 1 2.mkv'.
> "Error splitting the argument list: Option not found"
>
> Perhaps it would be expeditious if you showed me your command line that
> works, eh?
I didn't need to escape
ffmpeg -i input.avs -vf shuffleframes="-1 1" -c:v libx264 -crf 20 -an
out1.mkv
ffmpeg -i input.avs -vf shuffleframes="-1 1 2" -c:v libx264 -crf 20 -an
out2.mkv
input.avs is a 24.0fps blankclip with showframenumber() to overlay the
framenumbers so I could examine the output later.
(I noticed mp4 container does not work properly for this, there are
duplicated frames, but mkv output is ok)
Mark Filipak (ffmpeg) wrote
> Oh dear. Is there a escaping row between Windows and ffmpeg? Here's the
> logfile:
> ffmpeg started on 2021-02-21 at 11:50:29
> Report written to "ffmpeg-20210221-115029.log"
> Log level: 32
> Command line:
> ffmpeg -i 0.mkv -vf "shuffleframes=-1 1 2" -dn "\\-1 1 2.mkv"
> ffmpeg version N-100851-g9f38fac053 Copyright (c) 2000-2021 the FFmpeg
> developers
> built with gcc 9.3-win32 (GCC) 20200320
> configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static
> --pkg-config=pkg-config
> --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32
> --enable-gpl --enable-version3
> --disable-debug --disable-w32threads --enable-pthreads --enable-iconv
> --enable-zlib --enable-libxml2
> --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma
> --enable-fontconfig
> --enable-opencl --enable-libvmaf --enable-vulkan --enable-libvorbis
> --enable-amf --enable-libaom
> --enable-avisynth --enable-libdav1d --enable-libdavs2 --enable-ffnvcodec
> --enable-cuda-llvm
> --enable-libglslang --enable-libass --enable-libbluray --enable-libmp3lame
> --enable-libopus
> --enable-libtheora --enable-libvpx --enable-libwebp --enable-libmfx
> --enable-libopencore-amrnb
> --enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e
> --enable-librubberband
> --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt
> --enable-libsvtav1
> --enable-libtwolame --enable-libuavs3d --enable-libvidstab
> --enable-libx264 --enable-libx26
> libavutil 56. 64.100 / 56. 64.100
> libavcodec 58.119.100 / 58.119.100
> libavformat 58. 65.101 / 58. 65.101
> libavdevice 58. 11.103 / 58. 11.103
> libavfilter 7.100.100 / 7.100.100
> libswscale 5. 8.100 / 5. 8.100
> libswresample 3. 8.100 / 3. 8.100
> libpostproc 55. 8.100 / 55. 8.100
> Input #0, matroska,webm, from '0.mkv':
> Metadata:
> ENCODER : Lavf58.65.101
> Duration: 00:00:05.76, start: 0.000000, bitrate: 295 kb/s
> Stream #0:0: Video: h264 (High), yuv420p(tv, smpte170m, progressive),
> 240x236 [SAR 32:27 DAR
> 640:531], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
> Metadata:
> ENCODER : Lavc58.119.100 libx264
> DURATION : 00:00:05.756000000
> Stream #0:1: Audio: vorbis, 48000 Hz, stereo, fltp (default)
> Metadata:
> _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
> BPS-eng : 80531
> DURATION-eng : 00:00:05.736000000
> NUMBER_OF_FRAMES-eng: 338
> NUMBER_OF_BYTES-eng: 57741
> _STATISTICS_WRITING_APP-eng: mkvmerge v51.0.0 ('I Wish') 64-bit
> _STATISTICS_WRITING_DATE_UTC-eng: 2020-12-21 04:14:21
> ENCODER : Lavc58.119.100 libvorbis
> DURATION : 00:00:05.719000000
> Stream mapping:
> Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
> Stream #0:1 -> #0:1 (vorbis (native) -> vorbis (libvorbis))
> Press [q] to stop, [?] for help
> [libvorbis @ 000001b0c4130a80] Queue input is backward in time
> [libx264 @ 000001b0c2399140] using SAR=32/27
> [libx264 @ 000001b0c2399140] using cpu capabilities: MMX2 SSE2Fast SSSE3
> SSE4.2 AVX FMA3 BMI2 AVX2
> [libx264 @ 000001b0c2399140] profile High, level 1.2, 4:2:0, 8-bit
> [libx264 @ 000001b0c2399140] 264 - core 161 - H.264/MPEG-4 AVC codec -
> Copyleft 2003-2020 -
> http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0
> analyse=0x3:0x113 me=hex
> subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1
> trellis=1 8x8dct=1 cqm=0
> deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=7
> lookahead_threads=1 sliced_threads=0 nr=0
> decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3
> b_pyramid=2 b_adapt=1 b_bias=0
> direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=23
> scenecut=40 intra_refresh=0
> rc_lookahead=40 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, matroska, to '\-1 1 2.mkv':
> Metadata:
> encoder : Lavf58.65.101
> Stream #0:0: Video: h264 (H264 / 0x34363248), yuv420p(tv, smpte170m,
> progressive), 240x236 [SAR
> 32:27 DAR 640:531], q=2-31, 23.98 fps, 1k tbn (default)
> Metadata:
> DURATION : 00:00:05.756000000
> encoder : Lavc58.119.100 libx264
> Side data:
> cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
> Stream #0:1: Audio: vorbis (oV[0][0] / 0x566F), 48000 Hz, stereo,
> fltp (default)
> Metadata:
> _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
> BPS-eng : 80531
> DURATION-eng : 00:00:05.736000000
> NUMBER_OF_FRAMES-eng: 338
> NUMBER_OF_BYTES-eng: 57741
> _STATISTICS_WRITING_APP-eng: mkvmerge v51.0.0 ('I Wish') 64-bit
> _STATISTICS_WRITING_DATE_UTC-eng: 2020-12-21 04:14:21
> DURATION : 00:00:05.719000000
> encoder : Lavc58.119.100 libvorbis
> frame= 2 fps=0.0 q=0.0 size= 5kB time=00:00:00.36 bitrate=
> 114.0kbits/s speed=13.7x
> [libvorbis @ 000001b0c4130a80] Queue input is backward in time
> frame= 92 fps=0.0 q=-1.0 Lsize= 174kB time=00:00:05.70 bitrate=
> 250.0kbits/s speed=20.3x
> video:112kB audio:55kB subtitle:0kB other streams:0kB global headers:4kB
> muxing overhead: 4.748137%
> [libx264 @ 000001b0c2399140] frame I:1 Avg QP:21.36 size: 1139
> [libx264 @ 000001b0c2399140] frame P:25 Avg QP:23.08 size: 2331
> [libx264 @ 000001b0c2399140] frame B:66 Avg QP:27.39 size: 821
> [libx264 @ 000001b0c2399140] consecutive B-frames: 2.2% 6.5% 0.0% 91.3%
> [libx264 @ 000001b0c2399140] mb I I16..4: 17.8% 78.7% 3.6%
> [libx264 @ 000001b0c2399140] mb P I16..4: 3.8% 19.1% 3.0% P16..4:
> 37.6% 21.5% 10.9% 0.0% 0.0%
> skip: 4.2%
> [libx264 @ 000001b0c2399140] mb B I16..4: 0.8% 2.5% 0.9% B16..8:
> 38.6% 8.0% 2.7% direct:
> 5.2% skip:41.4% L0:55.3% L1:35.3% BI: 9.5%
> [libx264 @ 000001b0c2399140] 8x8 transform intra:70.4% inter:75.2%
> [libx264 @ 000001b0c2399140] coded y,uvDC,uvAC intra: 53.9% 76.7% 21.0%
> inter: 19.8% 25.2% 2.1%
> [libx264 @ 000001b0c2399140] i16 v,h,dc,p: 47% 12% 19% 22%
> [libx264 @ 000001b0c2399140] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 35% 15% 18%
> 3% 5% 8% 5% 8% 4%
> [libx264 @ 000001b0c2399140] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 28% 21% 14%
> 6% 5% 6% 5% 10% 5%
> [libx264 @ 000001b0c2399140] i8c dc,h,v,p: 47% 16% 33% 5%
> [libx264 @ 000001b0c2399140] Weighted P-Frames: Y:28.0% UV:24.0%
> [libx264 @ 000001b0c2399140] ref P L0: 57.0% 15.0% 19.1% 8.3% 0.5%
> [libx264 @ 000001b0c2399140] ref B L0: 89.2% 8.5% 2.3%
> [libx264 @ 000001b0c2399140] ref B L1: 97.9% 2.1%
> [libx264 @ 000001b0c2399140] kb/s:159.04
>
> =====
"[libvorbis @ 000001b0c4130a80] Queue input is backward in time"
that might be a clue, but it doesn't sound good . My test did not have
audio
For the 1st "fail" case, it's 1/2 the frames, but same framerate, thus 1/2
the duration, how does it handle audio ? or how do you want it to handle
audio ?
--
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