Hi, I am trying to convert a mp4 video file to 512k amd 1024k video bitrate, but the converted file is only about 350k.
The command used is : ffmpeg -i src_file.mp4 -y -ab "512k" -ac "2" -c:a "libfdk_aac" -ar "44100" -c:v "libx264" -r "29.97" -b:v "512k" -minrate "512k" -maxrate "512k" -bufsize "512k" -crf "23" -threads 1 dest_file.mp4 *Orig file specs are as under :* Format : MPEG-4 Format profile : Base Media Codec ID : isom (isom/iso2/avc1/mp41) File size : 69.7 MiB Duration : 4 min 54 s Overall bit rate mode : Variable Overall bit rate : 1 986 kb/s Writing application : Lavf51.12.1 Video ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : [email protected] Format settings, CABAC : No Format settings, ReFrames : 1 frame Format settings, GOP : M=1, N=12 Codec ID : avc1 Codec ID/Info : Advanced Video Coding Duration : 4 min 54 s Bit rate : 1 872 kb/s Width : 640 pixels Height : 480 pixels Display aspect ratio : 4:3 Frame rate mode : Constant Frame rate : 15.000 FPS Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Progressive Bits/(Pixel*Frame) : 0.406 Stream size : 65.7 MiB (94%) Language : English Audio ID : 2 Format : AAC Format/Info : Advanced Audio Codec Format profile : LC Codec ID : 40 Duration : 4 min 54 s Bit rate mode : Variable Bit rate : 111 kb/s Channel(s) : 2 channels Channel positions : Front: L R Sampling rate : 44.1 kHz Frame rate : 43.066 FPS (1024 spf) Compression mode : Lossy Stream size : 3.91 MiB (6%) *Console Output is as under:* ffmpeg version N-89723-g2ca65fc Copyright (c) 2000-2018 the FFmpeg developers built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-17) configuration: --prefix=/home/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/ffmpeg_build/include --extra-ldflags=-L/home/ffmpeg_build/lib --extra-libs=-lpthread --extra-libs=-lm --bindir=/home/ffmpeg_bin --enable-gpl --enable-libfdk_aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libopencore-amrnb --enable-libx264 --enable-nonfree --enable-version3 libavutil 56. 7.100 / 56. 7.100 libavcodec 58. 9.100 / 58. 9.100 libavformat 58. 3.100 / 58. 3.100 libavdevice 58. 0.100 / 58. 0.100 libavfilter 7. 11.101 / 7. 11.101 libswscale 5. 0.101 / 5. 0.101 libswresample 3. 0.101 / 3. 0.101 libpostproc 55. 0.100 / 55. 0.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'NPVD0010.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 creation_time : 2018-01-10T13:13:52.000000Z encoder : Lavf51.12.1 Duration: 00:04:54.48, start: 0.000000, bitrate: 1986 kb/s Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 1871 kb/s, 15 fps, 15 tbr, 15 tbn, 30 tbc (default) Metadata: creation_time : 2018-01-10T13:15:03.000000Z handler_name : VideoHandler Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 111 kb/s (default) Metadata: creation_time : 2018-01-10T13:15:03.000000Z handler_name : SoundHandler Stream mapping: Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264)) Stream #0:1 -> #0:1 (aac (native) -> aac (libfdk_aac)) Press [q] to stop, [?] for help [libx264 @ 0x2d1b340] using SAR=1/1 [libx264 @ 0x2d1b340] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 [libx264 @ 0x2d1b340] profile High, level 3.0 [libx264 @ 0x2d1b340] 264 - core 155 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - 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 vbv_maxrate=512 vbv_bufsize=512 crf_max=0.0 nal_hrd=none filler=0 ip_ratio=1.40 aq=1:1.00 Output #0, mp4, to 'NPVD0010.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf58.3.100 Stream #0:0(eng): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], q=-1--1, 512 kb/s, 29.97 fps, 11988 tbn, 29.97 tbc (default) Metadata: creation_time : 2018-01-10T13:15:03.000000Z handler_name : VideoHandler encoder : Lavc58.9.100 libx264 Side data: cpb: bitrate max/min/avg: 512000/0/512000 buffer size: 512000 vbv_delay: -1 Stream #0:1(eng): Audio: aac (libfdk_aac) (mp4a / 0x6134706D), 44100 Hz, stereo, s16, 64 kb/s (default) Metadata: creation_time : 2018-01-10T13:15:03.000000Z handler_name : SoundHandler encoder : Lavc58.9.100 libfdk_aac More than 1000 frames duplicated 3072kB time=00:01:04.06 bitrate= 392.8kbits/s dup=952 drop=0 speed=5.93x frame= 8821 fps=174 q=-1.0 Lsize= 14126kB time=00:04:54.47 bitrate= 393.0kbits/s dup=4406 drop=0 speed= 5.8x video:11512kB audio:2302kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.261231% [libx264 @ 0x2d1b340] frame I:41 Avg QP:18.87 size: 20791 [libx264 @ 0x2d1b340] frame P:2755 Avg QP:22.05 size: 3511 [libx264 @ 0x2d1b340] frame B:6025 Avg QP:20.54 size: 210 [libx264 @ 0x2d1b340] consecutive B-frames: 0.6% 23.1% 5.3% 71.0% [libx264 @ 0x2d1b340] mb I I16..4: 30.0% 27.5% 42.5% [libx264 @ 0x2d1b340] mb P I16..4: 5.8% 4.5% 2.0% P16..4: 21.1% 3.3% 2.1% 0.0% 0.0% skip:61.3% [libx264 @ 0x2d1b340] mb B I16..4: 0.2% 0.2% 0.0% B16..8: 10.5% 0.2% 0.0% direct: 0.3% skip:88.6% L0:28.5% L1:70.6% BI: 1.0% [libx264 @ 0x2d1b340] 8x8 transform intra:35.8% inter:47.0% [libx264 @ 0x2d1b340] coded y,uvDC,uvAC intra: 33.5% 45.6% 17.7% inter: 3.6% 5.8% 1.1% [libx264 @ 0x2d1b340] i16 v,h,dc,p: 29% 47% 11% 13% [libx264 @ 0x2d1b340] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 30% 32% 28% 2% 1% 1% 1% 2% 3% [libx264 @ 0x2d1b340] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 33% 28% 16% 4% 4% 4% 4% 4% 4% [libx264 @ 0x2d1b340] i8c dc,h,v,p: 39% 35% 19% 7% [libx264 @ 0x2d1b340] Weighted P-Frames: Y:3.8% UV:2.4% [libx264 @ 0x2d1b340] ref P L0: 76.9% 11.3% 9.4% 2.2% 0.1% [libx264 @ 0x2d1b340] ref B L0: 83.6% 13.8% 2.7% [libx264 @ 0x2d1b340] ref B L1: 95.2% 4.8% [libx264 @ 0x2d1b340] kb/s:320.40 Please help to get the converted files with exact bit rates. *Thanks,* *Vikram* _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
