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POEncode x264 video with ffmpeg for Android with starting offset
 

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  1. POEncode x264 video with ffmpeg for Android with starting offset
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    <p>I'm trying to convert a video to play on an Android device. The video is from a big movie. I am chopping it back into pieces to correspond with the actual segments of the movie using -ss and -t.</p> <p>The input is mp4 with H.264 and AAC. The output is mkv using H.264 and Vorbis.</p> <p>Specifically, the input is: </p> <pre><code>Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 320x240, 2240 kb/s, 29.97 fps, 60 tbr, 90k tbn, 180k tbc Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, s16, 162 kb/s </code></pre> <p>I'm using: ffmpeg version 1.0.7</p> <p>The command I'm trying is something like: </p> <pre><code>ffmpeg -ss 00:03:52.000 -i in.mp4 -t 00:01:00.000 -c:v libx264 -preset medium -crf 20 -maxrate 400k -bufsize 1835k -c:a libvorbis -sn out.mkv </code></pre> <p>However, while the resulting video works fine on my computer, when I click on my phone, it says: Can't play video and checking the Android log, it has: </p> <pre><code>E/SoftAVC (24319): Decoder failed: -2 E/OMXCodec(24319): [OMX.google.h264.decoder] ERROR(0x80001001, -1007) </code></pre> <p>It is still able to make a thumbnail for the movie, but not play it.</p> <p>Interestingly, some simple variations of that command do work: Remove -ss to start at the beginning of the video Use -an to disable audio</p> <p>These variations still failed: Copying the original audio with -c:a copy, or other audio codecs like vorbis, mp3 Using mp4 instead of mkv Using baseline H.264 profile, including restricting level to 1.2.</p> <p>Running through mkvmerge first not only fails, but makes Android not able to even make a thumbnail.</p> <p>I don't know if it is related, but another small thing I noticed is that for starting transcoding later in the movie, the audio starts out slightly out-of-sync. After several seconds, it gets back in sync. The audio is in sync in the original.</p> <p>Robert Rowntree: </p> <pre><code>-vcodec libx264 -b:v 200k -bt 50k -threads 0 -b_strategy 1 -acodec copy -f mp4 -strict -2 </code></pre> <p>Interesting. Your command almost works. The video actually plays on Android. The one problem is that the audio is out-of-sync and stays out-of-sync throughout the whole clip. But, that's much closer than I've been. I'll search around there and see if I can find the right combination.</p> <p>I tried combinations of it. It appears that using both mp4 and copying the audio is what allows it to work. Using libvorbis or going to mkv breaks it again. But, I would like to transcode the audio, and I suspect to keep it in sync, I might have to transcode it anyways. Note that even with transcoding, when I play it back on the computer, I still don't have sync between audio and video.</p> <p>LordNeckbeard: Here is the complete log. </p> <pre><code>ffmpeg version 1.0.7 Copyright (c) 2000-2013 the FFmpeg developers built on Jul 27 2013 13:01:19 with gcc 4.4.5 (Gentoo 4.4.5 p1.2, pie-0.4.5) configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --enable-shared --cc=x86_64-pc-linux-gnu-gcc --cxx=x86_64-pc-linux-gnu-g++ --ar=x86_64-pc-linux-gnu-ar --optflags='-mtune=athlon64 -O2 -pipe -fomit-frame-pointer -fstack-protector' --extra-cflags='-mtune=athlon64 -O2 -pipe -fomit-frame-pointer -fstack-protector' --extra-cxxflags='-mtune=athlon64 -O2 -pipe -fomit-frame-pointer -fstack-protector' --disable-static --enable-gpl --enable-version3 --enable-postproc --enable-avfilter --enable-avresample --disable-stripping --disable-debug --disable-doc --disable-vaapi --disable-runtime-cpudetect --enable-libmp3lame --enable-libvo-aacenc --enable-libtheora --enable-libx264 --enable-libxvid --enable-libcaca --enable-openal --disable-indev=v4l2 --disable-indev=oss --disable-indev=jack --enable-x11grab --disable-outdev=oss --enable-libfreetype --enable-pthreads --enable-libspeex --enable-libvorbis --disable-altivec --disable-avx --disable-vis --disable-neon --cpu=athlon64 - libavutil 51. 73.101 / 51. 73.101 libavcodec 54. 59.100 / 54. 59.100 libavformat 54. 29.104 / 54. 29.104 libavdevice 54. 2.101 / 54. 2.101 libavfilter 3. 17.100 / 3. 17.100 libswscale 2. 1.101 / 2. 1.101 libswresample 0. 15.100 / 0. 15.100 libpostproc 52. 0.100 / 52. 0.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'in.mp4': Metadata: major_brand : mp42 minor_version : 0 compatible_brands: mp42isomavc1 creation_time : 2013-07-13 02:23:51 encoder : HandBrake 0.9.6 2012022800 Duration: 03:14:01.41, start: 0.000000, bitrate: 2408 kb/s Chapter #0.0: start -0.133467, end 648.697411 Metadata: title : Chapter 1 Chapter #0.1: start 648.697411, end 1297.345411 Metadata: title : Chapter 2 Chapter #0.2: start 1297.345411, end 1729.777411 Metadata: title : Chapter 3 Chapter #0.3: start 1729.777411, end 2378.425411 Metadata: title : Chapter 4 Chapter #0.4: start 2378.425411, end 3027.073411 Metadata: title : Chapter 5 Chapter #0.5: start 3027.073411, end 3675.721411 Metadata: title : Chapter 6 Chapter #0.6: start 3675.721411, end 4108.153411 Metadata: title : Chapter 7 Chapter #0.7: start 4108.153411, end 4756.801411 Metadata: title : Chapter 8 Chapter #0.8: start 4756.801411, end 5405.449411 Metadata: title : Chapter 9 Chapter #0.9: start 5405.449411, end 6054.097411 Metadata: title : Chapter 10 Chapter #0.10: start 6054.097411, end 6702.745411 Metadata: title : Chapter 11 Chapter #0.11: start 6702.745411, end 7135.177411 Metadata: title : Chapter 12 Chapter #0.12: start 7135.177411, end 7783.825411 Metadata: title : Chapter 13 Chapter #0.13: start 7783.825411, end 8432.473411 Metadata: title : Chapter 14 Chapter #0.14: start 8432.473411, end 9081.121411 Metadata: title : Chapter 15 Chapter #0.15: start 9081.121411, end 9513.553411 Metadata: title : Chapter 16 Chapter #0.16: start 9513.553411, end 10162.201411 Metadata: title : Chapter 17 Chapter #0.17: start 10162.201411, end 10810.849411 Metadata: title : Chapter 18 Chapter #0.18: start 10810.849411, end 11459.497411 Metadata: title : Chapter 19 Chapter #0.19: start 11459.497411, end 11641.412478 Metadata: title : Chapter 20 Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 320x240, 2240 kb/s, 29.97 fps, 60 tbr, 90k tbn, 180k tbc Metadata: creation_time : 2013-07-13 02:23:51 Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, s16, 162 kb/s Metadata: creation_time : 2013-07-13 02:23:51 Stream #0:2(und): Subtitle: mov_text (text / 0x74786574) Metadata: creation_time : 2013-07-13 02:23:51 [libx264 @ 0x14ea220] using cpu capabilities: MMX2 SSE2Slow SlowCTZ [libx264 @ 0x14ea220] profile High, level 2.1 [libx264 @ 0x14ea220] 264 - core 120 - H.264/MPEG-4 AVC codec - Copyleft 2003-2011 - 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=3 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=60 keyint_min=6 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=20.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=400 vbv_bufsize=1835 crf_max=0.0 nal_hrd=none ip_ratio=1.40 aq=1:1.00 Output #0, matroska, to 'out.mkv': Metadata: major_brand : mp42 minor_version : 0 compatible_brands: mp42isomavc1 encoder : Lavf54.29.104 Chapter #0.0: start 0.000000, end 60.000000 Metadata: title : Chapter 1 Stream #0:0(und): Video: h264 (H264 / 0x34363248), yuv420p, 320x240, q=-1--1, 1k tbn, 60 tbc Metadata: creation_time : 2013-07-13 02:23:51 Stream #0:1(und): Audio: vorbis (oV[0][0] / 0x566F), 48000 Hz, stereo, flt Metadata: creation_time : 2013-07-13 02:23:51 Stream mapping: Stream #0:0 -&gt; #0:0 (h264 -&gt; libx264) Stream #0:1 -&gt; #0:1 (aac -&gt; libvorbis) Press [q] to stop, [?] for help frame= 1799 fps= 92 q=-1.0 Lsize= 3738kB time=00:00:59.98 bitrate= 510.5kbits/s dup=0 drop=51 =51 video:3016kB audio:683kB subtitle:0 global headers:4kB muxing overhead 0.939943% [libx264 @ 0x14ea220] frame I:31 Avg QP:20.23 size: 14126 [libx264 @ 0x14ea220] frame P:634 Avg QP:23.03 size: 3317 [libx264 @ 0x14ea220] frame B:1134 Avg QP:27.71 size: 482 [libx264 @ 0x14ea220] consecutive B-frames: 2.3% 12.8% 84.7% 0.2% [libx264 @ 0x14ea220] mb I I16..4: 3.8% 63.8% 32.4% [libx264 @ 0x14ea220] mb P I16..4: 0.1% 0.3% 0.1% P16..4: 47.4% 30.2% 19.5% 0.0% 0.0% skip: 2.4% [libx264 @ 0x14ea220] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 35.2% 3.0% 0.6% direct: 8.8% skip:52.3% L0:28.7% L1:63.9% BI: 7.4% [libx264 @ 0x14ea220] 8x8 transform intra:64.0% inter:59.5% [libx264 @ 0x14ea220] coded y,uvDC,uvAC intra: 94.2% 99.5% 95.5% inter: 23.3% 55.5% 14.0% [libx264 @ 0x14ea220] i16 v,h,dc,p: 75% 10% 5% 10% [libx264 @ 0x14ea220] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 16% 12% 8% 7% 8% 8% 11% 11% [libx264 @ 0x14ea220] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 17% 20% 7% 8% 9% 9% 10% 10% 11% [libx264 @ 0x14ea220] i8c dc,h,v,p: 38% 31% 14% 17% [libx264 @ 0x14ea220] Weighted P-Frames: Y:7.3% UV:4.4% [libx264 @ 0x14ea220] ref P L0: 48.8% 14.2% 29.1% 7.5% 0.4% [libx264 @ 0x14ea220] ref B L0: 65.4% 30.8% 3.7% [libx264 @ 0x14ea220] ref B L1: 89.0% 11.0% [libx264 @ 0x14ea220] kb/s:411.70 </code></pre>
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      1. VTUpMod
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      1. VTUpMod
    1. COtry with : "-vcodec libx264 -b:v 200k -bt 50k -threads 0 -b_strategy 1 -acodec copy -f mp4 -strict -2
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      1. USRobert Rowntree
    2. COYou need to include the complete ffmpeg console output along with your ffmpeg command.
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      1. POEncode x264 video with ffmpeg for Android with starting offset
      1. USLordNeckbeard
 

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