[FFmpeg-trac] #9545(undetermined:new): xfade does not work depending on audio duration
FFmpeg
trac at avcodec.org
Fri Dec 3 15:54:25 EET 2021
#9545: xfade does not work depending on audio duration
-------------------------------------+-------------------------------------
Reporter: slhck | Owner: (none)
Type: defect | Status: new
Priority: normal | Component:
| undetermined
Version: git-master | Resolution:
Keywords: xfade | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Comment (by slhck):
With the help of Paul Mahol I was able to work around it by using the
movie filter:
{{{
➜ ffmpeg \
-y \
-i chunks/53456-IMAGE_SLIDE.mp4 \
-filter_complex "
movie=chunks/53473-VIDEO_SLIDE.mp4:streams=dv+da[v0][a0];
[a0]atrim=0:5[audio];
[v0][0:v]xfade=transition=fade:duration=1:offset=5[video]
" \
-ac 2 \
-map "[video]" -map "[audio]" \
-pix_fmt yuv420p \
-s:v 320x240 \
-crf 28 \
segments/segment-fixed.mp4
ffmpeg version 4.4.1 Copyright (c) 2000-2021 the FFmpeg developers
built with Apple clang version 13.0.0 (clang-1300.0.29.3)
configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/4.4.1_3 --enable-
shared --enable-pthreads --enable-version3 --cc=clang --host-cflags=
--host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-
libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-
libopus --enable-librav1e --enable-librist --enable-librubberband
--enable-libsnappy --enable-libsrt --enable-libtesseract --enable-
libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis
--enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265
--enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig
--enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-
amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex
--enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack
--disable-indev=jack --enable-avresample --enable-videotoolbox
libavutil 56. 70.100 / 56. 70.100
libavcodec 58.134.100 / 58.134.100
libavformat 58. 76.100 / 58. 76.100
libavdevice 58. 13.100 / 58. 13.100
libavfilter 7.110.100 / 7.110.100
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 9.100 / 5. 9.100
libswresample 3. 9.100 / 3. 9.100
libpostproc 55. 9.100 / 55. 9.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'chunks/53456-IMAGE_SLIDE.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.76.100
Duration: 00:00:07.00, start: 0.000000, bitrate: 580 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
1280x720 [SAR 1:1 DAR 16:9], 576 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc
(default)
Metadata:
handler_name : VideoHandler
vendor_id : [0][0][0][0]
Stream mapping:
Stream #0:0 (h264) -> xfade:xfade
xfade -> Stream #0:0 (libx264)
atrim -> Stream #0:1 (aac)
Press [q] to stop, [?] for help
[libx264 @ 0x15a019e00] using SAR=4/3
[libx264 @ 0x15a019e00] using cpu capabilities: ARMv8 NEON
[libx264 @ 0x15a019e00] profile High, level 1.3, 4:2:0, 8-bit
[libx264 @ 0x15a019e00] 264 - core 163 r3060 5db6aa6 - H.264/MPEG-4 AVC
codec - Copyleft 2003-2021 - 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=25
scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=28.0
qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'segments/segment-fixed.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.76.100
Stream #0:0: Video: h264 (avc1 / 0x31637661), yuv420p(tv, progressive),
320x240 [SAR 4:3 DAR 16:9], q=2-31, 30 fps, 15360 tbn (default)
Metadata:
encoder : Lavc58.134.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp
(8 bit), 128 kb/s (default)
Metadata:
encoder : Lavc58.134.100 aac
[Parsed_movie_0 @ 0x159e69a30] EOF timestamp not reliable0 bitrate=N/A
speed= 0x
[Parsed_movie_0 @ 0x159e69a30] EOF timestamp not reliable94 bitrate=
0.1kbits/s speed= 9.4x
frame= 360 fps=0.0 q=-1.0 Lsize= 239kB time=00:00:11.90 bitrate=
164.7kbits/s speed=12.3x
video:153kB audio:78kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 3.631726%
[libx264 @ 0x15a019e00] frame I:2 Avg QP:27.27 size: 9910
[libx264 @ 0x15a019e00] frame P:207 Avg QP:29.01 size: 582
[libx264 @ 0x15a019e00] frame B:151 Avg QP:29.25 size: 102
[libx264 @ 0x15a019e00] consecutive B-frames: 39.2% 13.9% 2.5% 44.4%
[libx264 @ 0x15a019e00] mb I I16..4: 3.2% 69.0% 27.8%
[libx264 @ 0x15a019e00] mb P I16..4: 0.6% 0.8% 0.1% P16..4: 31.6%
7.0% 4.9% 0.0% 0.0% skip:55.0%
[libx264 @ 0x15a019e00] mb B I16..4: 0.1% 0.0% 0.0% B16..8: 23.8%
0.7% 0.2% direct: 0.2% skip:75.0% L0:45.9% L1:52.5% BI: 1.7%
[libx264 @ 0x15a019e00] 8x8 transform intra:58.3% inter:71.4%
[libx264 @ 0x15a019e00] coded y,uvDC,uvAC intra: 45.9% 54.9% 28.2% inter:
7.6% 6.1% 0.4%
[libx264 @ 0x15a019e00] i16 v,h,dc,p: 48% 21% 23% 9%
[libx264 @ 0x15a019e00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 11% 39% 4% 6%
6% 5% 5% 5%
[libx264 @ 0x15a019e00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 16% 16% 5% 11%
9% 8% 7% 6%
[libx264 @ 0x15a019e00] i8c dc,h,v,p: 58% 14% 23% 5%
[libx264 @ 0x15a019e00] Weighted P-Frames: Y:14.5% UV:14.5%
[libx264 @ 0x15a019e00] ref P L0: 53.9% 22.8% 16.5% 6.8% 0.0%
[libx264 @ 0x15a019e00] ref B L0: 86.9% 9.5% 3.6%
[libx264 @ 0x15a019e00] ref B L1: 96.6% 3.4%
[libx264 @ 0x15a019e00] kb/s:103.73
[aac @ 0x15a01b800] Qavg: 433.766
}}}
What would be causing this problem?
--
Ticket URL: <https://trac.ffmpeg.org/ticket/9545#comment:1>
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