On 9/19/15, Jim Worrall <[email protected]> wrote: > I am attempting to use ffmpeg to develop a finished video from raw video, > with fading audio and video in at the beginning, crossfading them between > clips, and fading them out at the end. I have three, 10-second clips for > testing (actually came out to 10.04, 10.04, and 10.01). For some earlier > clips I got it to work with 2 clips. > > Now, with these clips, the video in the first clip freezes when the fading > out starts. If I take out the audio filters and output, the video works > fine. Three clips doesn't work at all, many buffer queue overflows. But > even then, without acrossfade the video works fine. (And I did succeed with > 3 clips using a different strategy, concatenating silence to the beginning > of 2nd and 3rd clip, then amix, but that is more complex and I’d like to > avoid it) But maybe we can deal with that if I can get 2 to work reliably. > > 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. > 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, lavfi, from 'color=black': > Duration: N/A, start: 0.000000, bitrate: N/A > Stream #2:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 320x240 [SAR > 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc > [libx264 @ 0x7fc3cd000c00] using SAR=8/9 > [libx264 @ 0x7fc3cd000c00] using cpu capabilities: MMX2 SSE2Fast SSSE3 > SSE4.2 > [libx264 @ 0x7fc3cd000c00] profile Constrained Baseline, level 3.0 > [libx264 @ 0x7fc3cd000c00] 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) -> afade > Stream #1:0 (dvvideo) -> fade > Stream #1:1 (pcm_s16le) -> asetpts > Stream #2:0 (rawvideo) -> scale > overlay -> Stream #0:0 (libx264) > acrossfade -> Stream #0:1 (libfdk_aac) > Press [q] to stop, [?] for help > frame= 452 fps= 75 q=-1.0 Lsize= 8113kB time=00:00:18.08 > bitrate=3676.1kbits/s > video:7536kB audio:566kB subtitle:0kB other streams:0kB global headers:0kB > muxing overhead: 0.138662% > [libx264 @ 0x7fc3cd000c00] frame I:2 Avg QP:21.50 size: 29442 > [libx264 @ 0x7fc3cd000c00] frame P:450 Avg QP:24.24 size: 17016 > [libx264 @ 0x7fc3cd000c00] mb I I16..4: 100.0% 0.0% 0.0% > [libx264 @ 0x7fc3cd000c00] mb P I16..4: 26.4% 0.0% 0.0% P16..4: 52.0% > 0.0% 0.0% 0.0% 0.0% skip:21.6% > [libx264 @ 0x7fc3cd000c00] coded y,uvDC,uvAC intra: 29.5% 24.7% 4.5% inter: > 42.7% 30.1% 1.4% > [libx264 @ 0x7fc3cd000c00] i16 v,h,dc,p: 44% 32% 14% 10% > [libx264 @ 0x7fc3cd000c00] i8c dc,h,v,p: 57% 19% 19% 5% > [libx264 @ 0x7fc3cd000c00] kb/s:3414.28 > > > _______________________________________________ > ffmpeg-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
