Der Versuch, eine Videodatei zu trimmen, die vom Standardeingang weitergeleitet wird, funktioniert nur, wenn die Startdauer bei manchen Videos mehr als 2,0 Sekunden beträgt (insbesondere bei Videos, die mit einem Android-Telefon aufgenommen wurden, schlägt dies fehl).
Wenn ssauf 2,0 gesetzt ist, also ffmpeg -y -ss 00:00:02.0 -vcodec h264 -acodec aac -i pipe:0 -t 7 output_file.mp4, schlägt es mit der Ausgabe fehl [mov,mp4,m4a,3gp,3g2,mj2 @ 0xecf920] stream 1, offset 0x65ea3: partial file pipe:0: Invalid data found when processing input.
Hier ist das vollständige Protokoll:
$ cat camera_landscape.mp4 | ffmpeg -y -ss 00:00:02.0 -vcodec h264 -acodec aac -i pipe:0 -t 7 camera_landscape_test.mp4
ffmpeg version 2.6.4 Copyright (c) 2000-2015 the FFmpeg developers
built with gcc 4.9.2 (Debian 4.9.2-10)
configuration: --prefix=/usr --extra-cflags='-g -O2 -fstack-protector-strong -Wformat -Werror=format-security ' --extra-ldflags='-Wl,-z,relro' --cc='ccache cc' --enable-shared --enable-libmp3lame --enable-gpl --enable-nonfree --enable-libvorbis --enable-pthreads --enable-libfaac --enable-libxvid --enable-postproc --enable-x11grab --enable-libgsm --enable-libtheora --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264 --enable-libspeex --enable-nonfree --disable-stripping --enable-libvpx --enable-libschroedinger --disable-encoder=libschroedinger --enable-version3 --enable-libopenjpeg --enable-librtmp --enable-avfilter --enable-libfreetype --enable-libvo-aacenc --disable-decoder=amrnb --enable-libvo-amrwbenc --enable-libaacplus --libdir=/usr/lib/x86_64-linux-gnu --disable-vda --enable-libbluray --enable-libcdio --enable-gnutls --enable-frei0r --enable-openssl --enable-libass --enable-libopus --enable-fontconfig --enable-libpulse --disable-mips32r2 --disable-mipsdspr1 --disable-mipsdspr2 --enable-libvidstab --enable-libzvbi --enable-avresample --disable-htmlpages --disable-podpages --enable-libutvideo --enable-libfdk-aac --enable-libx265 --enable-libiec61883 --enable-vaapi --enable-libdc1394 --disable-altivec --shlibdir=/usr/lib/x86_64-linux-gnu
libavutil 54. 20.100 / 54. 20.100
libavcodec 56. 26.100 / 56. 26.100
libavformat 56. 25.101 / 56. 25.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 11.102 / 5. 11.102
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'pipe:0':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
creation_time : 2015-09-27 09:46:32
Duration: 00:00:16.96, start: 0.000000, bitrate: N/A
Stream #0:0(eng): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 640x480, 5744 kb/s, SAR 1:1 DAR 4:3, 28.68 fps, 28.67 tbr, 90k tbn, 180k tbc (default)
Metadata:
creation_time : 2015-09-27 09:46:32
handler_name : VideoHandle
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 95 kb/s (default)
Metadata:
creation_time : 2015-09-27 09:46:32
handler_name : SoundHandle
[libx264 @ 0xee1000] using SAR=1/1
[libx264 @ 0xee1000] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0xee1000] profile High, level 3.0
[libx264 @ 0xee1000] 264 - core 146 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - 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=6 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=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'camera_landscape_test.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
encoder : Lavf56.25.101
Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 640x480 [SAR 1:1 DAR 4:3], q=-1--1, 28.67 fps, 11008 tbn, 28.67 tbc (default)
Metadata:
creation_time : 2015-09-27 09:46:32
handler_name : VideoHandle
encoder : Lavc56.26.100 libx264
Stream #0:1(eng): Audio: aac (libfaac) ([64][0][0][0] / 0x0040), 48000 Hz, mono, s16, 128 kb/s (default)
Metadata:
creation_time : 2015-09-27 09:46:32
handler_name : SoundHandle
encoder : Lavc56.26.100 libfaac
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (aac (native) -> aac (libfaac))
[mov,mp4,m4a,3gp,3g2,mj2 @ 0xecf920] stream 1, offset 0x65ea3: partial file
pipe:0: Invalid data found when processing input
frame= 0 fps=0.0 q=0.0 Lsize= 0kB time=00:00:00.00 bitrate=N/A
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Alles über 2,0 ist erfolgreich, und zwar wie folgt:
$ cat camera_landscape.mp4 | ffmpeg -y -ss 00:00:02.1 -vcodec h264 -acodec aac -i pipe:0 -t 7 camera_landscape_test.mp4
ffmpeg version 2.6.4 Copyright (c) 2000-2015 the FFmpeg developers
built with gcc 4.9.2 (Debian 4.9.2-10)
configuration: --prefix=/usr --extra-cflags='-g -O2 -fstack-protector-strong -Wformat -Werror=format-security ' --extra-ldflags='-Wl,-z,relro' --cc='ccache cc' --enable-shared --enable-libmp3lame --enable-gpl --enable-nonfree --enable-libvorbis --enable-pthreads --enable-libfaac --enable-libxvid --enable-postproc --enable-x11grab --enable-libgsm --enable-libtheora --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264 --enable-libspeex --enable-nonfree --disable-stripping --enable-libvpx --enable-libschroedinger --disable-encoder=libschroedinger --enable-version3 --enable-libopenjpeg --enable-librtmp --enable-avfilter --enable-libfreetype --enable-libvo-aacenc --disable-decoder=amrnb --enable-libvo-amrwbenc --enable-libaacplus --libdir=/usr/lib/x86_64-linux-gnu --disable-vda --enable-libbluray --enable-libcdio --enable-gnutls --enable-frei0r --enable-openssl --enable-libass --enable-libopus --enable-fontconfig --enable-libpulse --disable-mips32r2 --disable-mipsdspr1 --disable-mipsdspr2 --enable-libvidstab --enable-libzvbi --enable-avresample --disable-htmlpages --disable-podpages --enable-libutvideo --enable-libfdk-aac --enable-libx265 --enable-libiec61883 --enable-vaapi --enable-libdc1394 --disable-altivec --shlibdir=/usr/lib/x86_64-linux-gnu
libavutil 54. 20.100 / 54. 20.100
libavcodec 56. 26.100 / 56. 26.100
libavformat 56. 25.101 / 56. 25.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 11.102 / 5. 11.102
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'pipe:0':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
creation_time : 2015-09-27 09:46:32
Duration: 00:00:16.96, start: 0.000000, bitrate: N/A
Stream #0:0(eng): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 640x480, 5744 kb/s, SAR 1:1 DAR 4:3, 28.68 fps, 28.67 tbr, 90k tbn, 180k tbc (default)
Metadata:
creation_time : 2015-09-27 09:46:32
handler_name : VideoHandle
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 95 kb/s (default)
Metadata:
creation_time : 2015-09-27 09:46:32
handler_name : SoundHandle
[libx264 @ 0xbe5000] using SAR=1/1
[libx264 @ 0xbe5000] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0xbe5000] profile High, level 3.0
[libx264 @ 0xbe5000] 264 - core 146 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - 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=6 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=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'camera_landscape_test.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
encoder : Lavf56.25.101
Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 640x480 [SAR 1:1 DAR 4:3], q=-1--1, 28.67 fps, 11008 tbn, 28.67 tbc (default)
Metadata:
creation_time : 2015-09-27 09:46:32
handler_name : VideoHandle
encoder : Lavc56.26.100 libx264
Stream #0:1(eng): Audio: aac (libfaac) ([64][0][0][0] / 0x0040), 48000 Hz, mono, s16, 128 kb/s (default)
Metadata:
creation_time : 2015-09-27 09:46:32
handler_name : SoundHandle
encoder : Lavc56.26.100 libfaac
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (aac (native) -> aac (libfaac))
frame= 201 fps= 70 q=-1.0 Lsize= 543kB time=00:00:07.01 bitrate= 634.0kbits/s dup=1 drop=0
video:465kB audio:71kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.238381%
[libx264 @ 0xbe5000] frame I:1 Avg QP:21.12 size: 5005
[libx264 @ 0xbe5000] frame P:200 Avg QP:22.80 size: 2354
[libx264 @ 0xbe5000] mb I I16..4: 17.2% 82.0% 0.8%
[libx264 @ 0xbe5000] mb P I16..4: 5.2% 9.7% 0.0% P16..4: 53.7% 3.0% 3.4% 0.0% 0.0% skip:25.0%
[libx264 @ 0xbe5000] 8x8 transform intra:65.7% inter:97.4%
[libx264 @ 0xbe5000] coded y,uvDC,uvAC intra: 27.7% 59.6% 0.0% inter: 20.1% 49.5% 0.0%
[libx264 @ 0xbe5000] i16 v,h,dc,p: 21% 31% 24% 24%
[libx264 @ 0xbe5000] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 12% 14% 58% 3% 3% 3% 3% 2% 2%
[libx264 @ 0xbe5000] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 14% 6% 66% 4% 3% 3% 3% 1% 1%
[libx264 @ 0xbe5000] i8c dc,h,v,p: 62% 21% 16% 1%
[libx264 @ 0xbe5000] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0xbe5000] ref P L0: 38.2% 4.0% 33.1% 24.8%
[libx264 @ 0xbe5000] kb/s:542.91
Alles funktioniert einwandfrei, wenn der Input als Datei ( idirekt) referenziert wird, aber eine Weiterleitung ist zwingend erforderlich. Als Test wurde auch eine Youtube-Datei getestet, was erfolgreich war. Die Frage ist hier, warum dieser Vorgang bei diesem bestimmten Video fehlschlägt und wie man das Problem lösen kann.
Bearbeiten: Temporärer Videolink -http://tempsend.com/8F6F119BCA