Newest 'x264' Questions - Stack Overflow
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How to bookmark a video, to skip the video to a cetain duration ?
17 août 2016, par Prasanth Kumar ArisettiI am encoding the incoming camera data, using x264 encoder and mpegtsmux to a filesink .ts files.
I am pushing the buffers to the pipeline, using, g_signal_emi_by_name.Pipeline is something like this:
gst-launch-1.0 v4l2src ! videoconvert ! video/x-raw,width=720,height=576,framerate=25/1 ! x264enc ! mpegtsmux ! filesink location=test.tsNow, for that video, i would like to add bookmarks for certain duration to directly skip the video to that duration, when click on that duration.
How can i add bookmarks to that video?
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x264 threading latency
13 août 2016, par TheRockI wonder why sliceless threading (http://akuvian.org/src/x264/sliceless_threads.txt) in x264 leads to latency? If I have for example 2 threads the first encode one frame and the second encode one frame. The seconds have to wait for the first in some cases. But they can be encoded in parallel.
So two threads should be faster than only one, right?
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Need assistance to compile X264 in Visual Studio
8 août 2016, par Vikram BammanhalliI have been trying to open x264 code base in Visual Studio, by creating a separate project for it, but without any success.
I thought it should have been straight forward. I could build X264 code using MinGW, but I need to edit the code and extract motion estimation code.
Has anyone compiled/run the x264 from Visual Studio?
Thanks!
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FFMPEG creates incorrect Source duration
4 août 2016, par Byron WhitlockWhen transcoding movies from an AVI to mp4 sometimes FFMPEG sets the "Source Duration" incorrectly.
This messes up playback on IOS devices. Specifically, it causes the video to cut out at "Source duration" while the audio still plays.
FFMPEG output transcode doesn't' show anything odd at all. Looks normal, no errors or warnings.
- Can I force FFMPEG to never add the "Source Duration" metadata?
- How do I edit the track metadata shown by mediainfo? I tried Mp4box, and a few others, but I can't seem to figure out how to edit track level metadata.
Thanks.
Log is below.
ffmpeg version N-77455-g4707497 Copyright (c) 2000-2015 the FFmpeg developers built with gcc 5.2.0 (GCC) configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib libavutil 55. 11.100 / 55. 11.100 libavcodec 57. 20.100 / 57. 20.100 libavformat 57. 20.100 / 57. 20.100 libavdevice 57. 0.100 / 57. 0.100 libavfilter 6. 21.101 / 6. 21.101 libswscale 4. 0.100 / 4. 0.100 libswresample 2. 0.101 / 2. 0.101 libpostproc 54. 0.100 / 54. 0.100 Input #0, avi, from 'E:\MEDIA\Central.Intelligence.2016.HC.HDRip.XviD.AC3-EVO\Central.Intelligence.2016.HC.HDRip.XviD.AC3-EVO.avi': Metadata: encoder : VirtualDubMod 1.5.10.2 (build 2542/release) Duration: 01:51:43.27, start: 0.000000, bitrate: 1765 kb/s Stream #0:0: Video: mpeg4 (Advanced Simple Profile) (XVID / 0x44495658), yuv420p, 720x304 [SAR 1:1 DAR 45:19], 1563 kb/s, 23.98 fps, 23.98 tbr, 23.98 tbn, 23.98 tbc Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, stereo, fltp, 192 kb/s [libx264 @ 000000f3c80a0a80] using SAR=405/304 [libx264 @ 000000f3c80a0a80] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2 [libx264 @ 000000f3c80a0a80] profile High, level 3.1 [libx264 @ 000000f3c80a0a80] 264 - core 148 r2638 7599210 - 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=23 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=1280 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00 Output #0, mp4, to 'F:\STREAMS\Central.Intelligence.2016.HC.HDRip.XviD.AC3-EVO.avi.1280x720_1000kbps.TEMP.mp4': Metadata: encoder : Lavf57.20.100 Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1280x720 [SAR 405:304 DAR 45:19], q=-1--1, 1280 kb/s, 23.98 fps, 10000k tbn, 23.98 tbc Metadata: encoder : Lavc57.20.100 libx264 Side data: unknown side data type 10 (24 bytes) Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo, fltp, 160 kb/s Metadata: encoder : Lavc57.20.100 aac Stream mapping: Stream #0:0 -> #0:0 (mpeg4 (native) -> h264 (libx264)) Stream #0:1 -> #0:1 (ac3 (native) -> aac (native)) Press [q] to stop, [?] for help [mpeg4 @ 000000f3c80ae220] Video uses a non-standard and wasteful way to store B-frames ('packed B-frames'). Consider using the mpeg4_unpack_bframes bitstream filter without encoding but stream copy to fix it. frame= 15 fps=0.0 q=0.0 size= 0kB time=00:00:01.18 bitrate= 0.3kbits/s dup=1 drop=0 speed=2.36x --SNIP--- frame=160704 fps= 16 q=30.0 size= 1180376kB time=01:51:43.08 bitrate=1442.6kbits/s dup=1 drop=0 speed=0.671x [libx264 @ 0000001f60c5d900] frame I:1167 Avg QP:19.08 size: 44465 [libx264 @ 0000001f60c5d900] frame P:63049 Avg QP:22.26 size: 12774 [libx264 @ 0000001f60c5d900] frame B:110691 Avg QP:24.81 size: 2739 [libx264 @ 0000001f60c5d900] consecutive B-frames: 6.0% 22.8% 18.3% 53.0% [libx264 @ 0000001f60c5d900] mb I I16..4: 14.0% 76.1% 9.9% [libx264 @ 0000001f60c5d900] mb P I16..4: 2.5% 6.6% 0.4% P16..4: 44.5% 10.8% 5.2% 0.0% 0.0% skip:30.0% [libx264 @ 0000001f60c5d900] mb B I16..4: 0.1% 0.3% 0.0% B16..8: 32.1% 1.6% 0.2% direct: 0.9% skip:64.9% L0:37.9% L1:58.7% BI: 3.5% [libx264 @ 0000001f60c5d900] final ratefactor: 23.25 [libx264 @ 0000001f60c5d900] 8x8 transform intra:70.8% inter:85.8% [libx264 @ 0000001f60c5d900] coded y,uvDC,uvAC intra: 47.1% 56.6% 19.5% inter: 10.7% 14.2% 0.4% [libx264 @ 0000001f60c5d900] i16 v,h,dc,p: 46% 20% 8% 26% [libx264 @ 0000001f60c5d900] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 21% 17% 25% 5% 7% 7% 7% 6% 6% [libx264 @ 0000001f60c5d900] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 27% 20% 12% 5% 10% 9% 8% 5% 4% [libx264 @ 0000001f60c5d900] i8c dc,h,v,p: 58% 18% 18% 6% [libx264 @ 0000001f60c5d900] Weighted P-Frames: Y:1.4% UV:0.8% [libx264 @ 0000001f60c5d900] ref P L0: 62.6% 12.9% 18.9% 5.6% 0.1% [libx264 @ 0000001f60c5d900] ref B L0: 87.6% 11.0% 1.4% [libx264 @ 0000001f60c5d900] ref B L1: 94.6% 5.4% [libx264 @ 0000001f60c5d900] kb/s:1272.59 [aac @ 0000001f60b52180] Qavg: 954.859Edit
This has something to do with data, when I run this command (cut at 10 minutes)
ffmpeg.exe -i CI.mp4 -ss 00:00:00 -t 00:08:00 -vcodec copy -map_metadata 0 -acodec copy CI2.mp4Mediainfo shows
Duration : 9mn 49s Source duration : 2mn 40sWhen I run this one (18 minutes)
ffmpeg.exe -i CI.mp4 -ss 00:00:00 -t 00:18:00 -vcodec copy -map_metadata 0 -acodec copy CI2.mp4Mediainfo shows
Duration : 17mn 49s Source duration : 3mn 30sHow can I edit the metadata directly
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Where can I find the quantized residuals in x264 ?
28 juillet 2016, par dasyI'm trying to extract the quantized residuals of the macroblocks as determined by the encoder. Unfortunately I've not been able to find where this data is stored (I'm workig on the latest x264 snapshot: 20160727-2245). Which class should I inspect to find the residuals?
