I simplified the commands to highlight the problem and increase the chance of
getting help here. With my limited knowledge, it seems that the acrossfade
filter interferes with video.
Here is a command for two 10-second clips, cross-fading video and audio between
for two seconds. No error or warning. The video works fine without
acrossfade, but the stream from 0:v freezes during transition with the
acrossfade filter.
ffmpeg -i t1.mov -i t2.mov -f lavfi -i color=black -filter_complex \
"[0:v] fade=t=out:st=8.04:d=2:alpha=1, setpts=PTS-STARTPTS [v0]; \
[1:v] fade=t=in:d=2:alpha=1, setpts=PTS-STARTPTS+(8/TB) [v1]; \
[2:v] scale=720x480, trim=duration=18.09 [ovr0]; \
[ovr0][v0] overlay [ovr1]; \
[ovr1][v1] overlay [outv]; \
[0:a][1:a] acrossfade=d=2 [outa]" \
-map [outv] -c:v libx264 -preset ultrafast -map [outa] -c:a libfdk_aac -b:a
256K -y out.mp4
And here is the simplified command with three clips with the ouput. There are
buffer queue overflows, and the output is messed up in many ways. Again,
without acrossfade, the video comes out as expected, with no buffer queue
overflows, 2-second crossfades between the clips, and no freezes.
ffmpeg -i t1.mov -i t2.mov -i t3.mov -f lavfi -i color=black -filter_complex "\
[0:v] fade=t=out:st= 8:d=2:alpha=1, setpts=PTS-STARTPTS [vid0]; \
[1:v] fade=t=in:d=2:alpha=1, setpts=PTS-STARTPTS+(8/TB),
fade=t=out:st=16:d=2:alpha=1 [vid1]; \
[2:v] fade=t=in:d=2:alpha=1, setpts=PTS-STARTPTS+(16/TB) [vid2]; \
[3:v] scale=720x480, trim=duration=26.08[ovr0]; \
[ovr0][vid0] overlay [ovr1]; \
[ovr1][vid1] overlay [ovr2]; \
[ovr2][vid2] overlay [outv]; \
[0:a][1:a] acrossfade=d=2 [acf1]; \
[acf1][2:a] acrossfade=d=2 [outa]" \
-map '[outv]' -c:v libx264 -preset ultrafast -map '[outa]' -c:a libfdk_aac -b:a
256K -y out.mp4
ffmpeg version N-75262-g494b792 Copyright (c) 2000-2015 the FFmpeg developers
built with Apple LLVM version 6.1.0 (clang-602.0.53) (based on LLVM 3.6.0svn)
configuration: --prefix=/Volumes/Ramdisk/sw --enable-nonfree --enable-gpl
--enable-version3 --enable-libmp3lame --enable-libx264 --enable-libx265
--enable-libgsm --enable-libvpx --enable-libfdk-aac --enable-libvorbis
--enable-libass --enable-libfreetype --enable-libfontconfig --enable-libfribidi
--disable-outdevs --disable-ffserver --disable-network
libavutil 55. 2.100 / 55. 2.100
libavcodec 57. 1.100 / 57. 1.100
libavformat 57. 0.100 / 57. 0.100
libavdevice 57. 0.100 / 57. 0.100
libavfilter 6. 1.100 / 6. 1.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.100 / 2. 0.100
libpostproc 54. 0.100 / 54. 0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 't1.mov':
Metadata:
major_brand : qt
minor_version : 512
compatible_brands: qt
encoder : Lavf57.0.100
Duration: 00:00:10.04, start: 0.030333, bitrate: 30310 kb/s
Stream #0:0(eng): Video: dvvideo (dvc / 0x20637664), yuv411p, 720x480 [SAR
8:9 DAR 4:3], 28771 kb/s, SAR 10:11 DAR 15:11, 29.97 fps, 29.97 tbr, 30k tbn,
29.97 tbc (default)
Metadata:
handler_name : DataHandler
encoder : DV/DVCPRO - NTSC
timecode : 00:04:33;12
Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo,
s16, 1536 kb/s (default)
Metadata:
handler_name : DataHandler
Stream #0:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s
Metadata:
handler_name : DataHandler
timecode : 00:04:33;12
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 't2.mov':
Metadata:
major_brand : qt
minor_version : 512
compatible_brands: qt
encoder : Lavf57.0.100
Duration: 00:00:10.04, start: 0.030333, bitrate: 30310 kb/s
Stream #1:0(eng): Video: dvvideo (dvc / 0x20637664), yuv411p, 720x480 [SAR
8:9 DAR 4:3], 28771 kb/s, SAR 10:11 DAR 15:11, 29.97 fps, 29.97 tbr, 30k tbn,
29.97 tbc (default)
Metadata:
handler_name : DataHandler
encoder : DV/DVCPRO - NTSC
timecode : 00:04:45;12
Stream #1:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo,
s16, 1536 kb/s (default)
Metadata:
handler_name : DataHandler
Stream #1:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s
Metadata:
handler_name : DataHandler
timecode : 00:04:45;12
Input #2, mov,mp4,m4a,3gp,3g2,mj2, from 't3.mov':
Metadata:
major_brand : qt
minor_version : 512
compatible_brands: qt
encoder : Lavf57.0.100
Duration: 00:00:10.01, start: 0.005542, bitrate: 30312 kb/s
Stream #2:0(eng): Video: dvvideo (dvc / 0x20637664), yuv411p, 720x480 [SAR
8:9 DAR 4:3], 28771 kb/s, SAR 10:11 DAR 15:11, 29.97 fps, 29.97 tbr, 30k tbn,
29.97 tbc (default)
Metadata:
handler_name : DataHandler
encoder : DV/DVCPRO - NTSC
timecode : 00:04:57;08
Stream #2:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo,
s16, 1536 kb/s (default)
Metadata:
handler_name : DataHandler
Stream #2:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s
Metadata:
handler_name : DataHandler
timecode : 00:04:57;08
Input #3, lavfi, from 'color=black':
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #3:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 320x240 [SAR 1:1
DAR 4:3], 25 tbr, 25 tbn, 25 tbc
[libx264 @ 0x7fca53009e00] using SAR=8/9
[libx264 @ 0x7fca53009e00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
[libx264 @ 0x7fca53009e00] profile Constrained Baseline, level 3.0
[libx264 @ 0x7fca53009e00] 264 - core 146 r2555 0c21480 - H.264/MPEG-4 AVC
codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options:
cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00
mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11
fast_pskip=1 chroma_qp_offset=0 threads=6 lookahead_threads=1 sliced_threads=0
nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0
weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0
crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
Output #0, mp4, to 'out.mp4':
Metadata:
major_brand : qt
minor_version : 512
compatible_brands: qt
encoder : Lavf57.0.100
Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p,
720x480 [SAR 8:9 DAR 4:3], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
Metadata:
encoder : Lavc57.1.100 libx264
Stream #0:1: Audio: aac (libfdk_aac) ([64][0][0][0] / 0x0040), 48000 Hz,
stereo, s16, 256 kb/s (default)
Metadata:
encoder : Lavc57.1.100 libfdk_aac
Stream mapping:
Stream #0:0 (dvvideo) -> fade
Stream #0:1 (pcm_s16le) -> acrossfade:crossfade0
Stream #1:0 (dvvideo) -> fade
Stream #1:1 (pcm_s16le) -> acrossfade:crossfade1
Stream #2:0 (dvvideo) -> fade
Stream #2:1 (pcm_s16le) -> acrossfade:crossfade1
Stream #3:0 (rawvideo) -> scale
overlay -> Stream #0:0 (libx264)
acrossfade -> Stream #0:1 (libfdk_aac)
Press [q] to stop, [?] for help
[Parsed_overlay_9 @ 0x7fca52c04b80] [framesync @ 0x7fca52c04c88] Buffer queue
overflow, dropping.
Last message repeated 43 times
[Parsed_overlay_9 @ 0x7fca52c04b80] [framesync @ 0x7fca52c04c88] Buffer queue
overflow, dropping.
Last message repeated 11 times
[Parsed_overlay_9 @ 0x7fca52c04b80] [framesync @ 0x7fca52c04c88] Buffer queue
overflow, dropping.
Last message repeated 22 times
[Parsed_overlay_9 @ 0x7fca52c04b80] [framesync @ 0x7fca52c04c88] Buffer queue
overflow, dropping.
Last message repeated 32 times
frame= 652 fps= 64 q=-1.0 Lsize= 8913kB time=00:00:26.08
bitrate=2799.6kbits/s
video:8081kB audio:816kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.175704%
[libx264 @ 0x7fca53009e00] frame I:3 Avg QP:21.00 size: 45702
[libx264 @ 0x7fca53009e00] frame P:649 Avg QP:22.61 size: 12538
[libx264 @ 0x7fca53009e00] mb I I16..4: 100.0% 0.0% 0.0%
[libx264 @ 0x7fca53009e00] mb P I16..4: 11.5% 0.0% 0.0% P16..4: 45.0% 0.0%
0.0% 0.0% 0.0% skip:43.6%
[libx264 @ 0x7fca53009e00] coded y,uvDC,uvAC intra: 38.0% 33.0% 6.1% inter:
28.9% 20.5% 1.2%
[libx264 @ 0x7fca53009e00] i16 v,h,dc,p: 34% 34% 18% 14%
[libx264 @ 0x7fca53009e00] i8c dc,h,v,p: 47% 23% 23% 7%
[libx264 @ 0x7fca53009e00] kb/s:2538.20
> On 2015 Sep 19, at 9:26 AM, Paul B Mahol <[email protected]> wrote:
>
> On 9/19/15, Jim Worrall <[email protected]> wrote:
>> . . .
>> The clips are available at:
>> https://dl.dropboxusercontent.com/u/18324334/t1.mov
>> https://dl.dropboxusercontent.com/u/18324334/t2.mov
>> https://dl.dropboxusercontent.com/u/18324334/t3.mov
>>
>> Here is the command and output for 2 clips:
>> ffmpeg -i t1.mov -i t2.mov -f lavfi -i color=black -filter_complex \
>> "[0:v] fade=t=in:d=2, fade=t=out:st=8.04:d=2:alpha=1, setpts=PTS-STARTPTS
>> [v0]; \
>> [1:v] fade=t=in:d=2:alpha=1, setpts=PTS-STARTPTS+(8/TB),
>> fade=t=out:st=16:d=2 [v1]; \
>> [2:v] scale=720x480, trim=duration=18.09 [ovr0]; \
>> [ovr0][v0] overlay [ovr1]; \
>> [ovr1][v1] overlay [outv]; \
>> [0:a] afade=t=in:d=2, asetpts=PTS-STARTPTS [a0]; \
>> [1:a] asetpts=PTS-STARTPTS, afade=t=out:st=8:d=2 [a1]; \
>> [a0][a1] acrossfade=d=2 [outa]" \
>> -map [outv] -c:v libx264 -preset ultrafast -map [outa] -c:a libfdk_aac -b:a
>> 256K -y out.mp4
>>
>
> acrossfade basically concatenate two audio clips so I dont get how this above
> can work.
. . .
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