Beim Versuch, das letzte Stück zu drücken, stellte ich fest, dass meine Dateien größer als kleiner werden. Leider muss ich einige Parameter falsch interpretiert haben.
Vielleicht können Sie mir helfen.
Die Referenz lautet -preset placebo:
ffmpeg -y -hide_banner -i <input.mp4> \ [... audio ...] \ -pix_fmt yuv420p \ -preset placebo \ -crf 30 \ -codec:v libx265 \ -f mp4 \ -movflags +faststart+disable_chpl \ <output.mp4> Die resultierende Dateigröße beträgt 130.780.586 Bytes.
Dann las ich die Dokumentation und versuchte die Bedeutung der Parameter zu verstehen.
Danach habe ich gebraucht
ffmpeg -y -hide_banner -i <input.mp4> \ [... audio ...] \ -pix_fmt yuv420p \ -preset placebo \ -crf 30 \ -x265-params "ssim=0:psnr=0:frame-threads=1:pools=*:wpp=0:pmode=0:pme=0:slices=1:copy-pic=1:level-idc=0:high-tier=1:ref=6:allow-non-conformance=0:uhd-bd=0:rd=6:ctu=64:min-cu-size=8:limit-refs=0:limit-modes=0:rect=0:amp=0:early-skip=0:rskip=0:splitrd-skip=0:fast-intra=0:b-intra=1:cu-lossless=1:tskip-fast=0:rd-refine=1:rdoq-level=1:tu-intra-depth=4:tu-inter-depth=4:limit-tu=0:nr-intra=0:tskip=0:rdpenalty=0:max-tu-size=32:dynamic-rd=0:ssim-rd=1:max-merge=5:me=full:subme=7:merange=32767:temporal-mvp=1:weightp=1:weightb=1:analyze-src-pics=1:strong-intra-smoothing=1:constrained-intra=0:psy-rd=2.0:psy-rdoq=1.0:open-gop=1:keyint=15000:min-keyint=2:scenecut=40:scenecut-bias=5:ctu-info=0:intra-refresh=0:rc-lookahead=250:lookahead-slices=0:lookahead-threads=0:b-adapt=2:bframes=16:bframe-bias=0:b-pyramid=1:force-flush=0:crf-max=51.0:crf-min=0.0:vbv-bufsize=0:vbv-maxrate=0:vbv-init=0.0:vbv-end=0.0:vbv-end-fr-adj=0:lossless=0:aq-mode=3:aq-strength=1.0:aq-motion=1:qg-size=8:cutree=1:strict-cbr=0:signhide=1:sao=1:sao-non-deblock=0:limit-sao=0:opt-qp-pps=1:opt-ref-list-length-pps=1:opt-cu-delta-qp=1" \ -codec:v libx265 \ -f mp4 \ -movflags +faststart+disable_chpl \ <output.mp4> Die resultierende Dateigröße beträgt 300.468.224 Bytes.
Anscheinend ist die visuelle Qualität besser. Aber ich dachte, dass es wegen konstant sein sollte -crf 30. Muss ich die variable Bitrate durch Erhöhen reduzieren -crf?
Zur besseren Lesbarkeit der Parameter noch einmal:
-x265-params " ssim=0: psnr=0: frame-threads=1: pools=*: wpp=0: pmode=0: pme=0: slices=1: copy-pic=1: level-idc=0: high-tier=1: ref=6: allow-non-conformance=0: uhd-bd=0: rd=6: ctu=64: min-cu-size=8: limit-refs=0: limit-modes=0: rect=0:amp=0: early-skip=0: rskip=0: splitrd-skip=0: fast-intra=0: b-intra=1: cu-lossless=1: tskip-fast=0: rd-refine=1: rdoq-level=1: tu-intra-depth=4: tu-inter-depth=4: limit-tu=0: nr-intra=0: tskip=0: rdpenalty=0: max-tu-size=32: dynamic-rd=0: ssim-rd=1: max-merge=5: me=full: subme=7: merange=32767: temporal-mvp=1: weightp=1: weightb=1: analyze-src-pics=1: strong-intra-smoothing=1: constrained-intra=0: psy-rd=2.0: psy-rdoq=1.0: open-gop=1: keyint=15000: min-keyint=2: scenecut=40: scenecut-bias=5: ctu-info=0: intra-refresh=0: rc-lookahead=250: lookahead-slices=0: lookahead-threads=0: b-adapt=2: bframes=16: bframe-bias=0: b-pyramid=1: force-flush=0: crf-max=51.0: crf-min=0.0: vbv-bufsize=0: vbv-maxrate=0: vbv-init=0.0: vbv-end=0.0: vbv-end-fr-adj=0: lossless=0: aq-mode=3: aq-strength=1.0: aq-motion=1: qg-size=8: cutree=1: strict-cbr=0: signhide=1: sao=1: sao-non-deblock=0: limit-sao=0: opt-qp-pps=1: opt-ref-list-length-pps=1: opt-cu-delta-qp=1" Die Ausgabe des placeboLaufs:
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '<input.mp4>': Metadata: major_brand : mp42 minor_version : 0 compatible_brands: mp42mp41 creation_time : 2018-03-25T07:58:52.000000Z Duration: 00:07:03.46, start: 0.000000, bitrate: 207200 kb/s Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 207062 kb/s, 24 fps, 24 tbr, 24k tbn, 48 tbc (default) Metadata: creation_time : 2018-03-25T07:58:52.000000Z handler_name : ?Mainconcept Video Media Handler encoder : AVC Coding Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 157 kb/s (default) Metadata: creation_time : 2018-03-25T07:58:52.000000Z handler_name : #Mainconcept MP4 Sound Media Handler Stream mapping: Stream #0:0 -> #0:0 (h264 (native) -> hevc (libx265)) Stream #0:1 -> #0:1 (aac (native) -> aac (native)) Press [q] to stop, [?] for help x265 [info]: HEVC encoder version 2.6 x265 [info]: build info [Linux][GCC 7.2.0][64 bit] 8bit+10bit+12bit x265 [info]: using cpu capabilities: MMX2 SSE2Fast LZCNT SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 x265 [info]: Main profile, Level-4 (Main tier) x265 [info]: Thread pool created using 8 threads x265 [info]: Slices : 1 x265 [info]: frame threads / pool features : 3 / wpp(17 rows) x265 [info]: Coding QT: max CU size, min CU size : 64 / 8 x265 [info]: Residual QT: max TU size, max depth : 32 / 4 inter / 4 intra x265 [info]: ME / range / subpel / merge : star / 92 / 5 / 5 x265 [info]: Keyframe min / max / scenecut / bias: 24 / 250 / 40 / 5.00 x265 [info]: Lookahead / bframes / badapt : 60 / 8 / 2 x265 [info]: b-pyramid / weightp / weightb : 1 / 1 / 1 x265 [info]: References / ref-limit cu / depth : 5 / off / off x265 [info]: AQ: mode / str / qg-size / cu-tree : 1 / 1.0 / 32 / 1 x265 [info]: Rate Control / qCompress : CRF-30.0 / 0.60 x265 [info]: tools: rect amp rd=6 psy-rd=2.00 rdoq=2 psy-rdoq=1.00 tskip x265 [info]: tools: signhide tmvp b-intra strong-intra-smoothing deblock sao Output #0, mp4, to '<output.mp4>': Metadata: major_brand : mp42 minor_version : 0 compatible_brands: mp42mp41 encoder : Lavf57.83.100 Stream #0:0(eng): Video: hevc (libx265) (hev1 / 0x31766568), yuv420p(progressive), 1506x1080 [SAR 1:1 DAR 251:180], q=2-31, 24 fps, 12288 tbn, 24 tbc (default) Metadata: creation_time : 2018-03-25T07:58:52.000000Z handler_name : ?Mainconcept Video Media Handler encoder : Lavc57.107.100 libx265 Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 48 kb/s (default) Metadata: creation_time : 2018-03-25T07:58:52.000000Z handler_name : #Mainconcept MP4 Sound Media Handler encoder : Lavc57.107.100 aac [mp4 @ 0x558418671660] Starting second pass: moving the moov atom to the beginning of the file frame=10162 fps=0.1 q=-0.0 Lsize= 127715kB time=00:07:03.43 bitrate=2470.8kbits/s speed=0.00405x video:124915kB audio:2502kB subtitle:0kB other streams:0kB global headers:2kB muxing overhead: 0.233744% x265 [info]: frame I: 58, Avg QP:32.08 kb/s: 3827.66 x265 [info]: frame P: 1838, Avg QP:33.65 kb/s: 3792.41 x265 [info]: frame B: 8266, Avg QP:36.26 kb/s: 2100.06 x265 [info]: Weighted P-Frames: Y:7.0% UV:7.0% x265 [info]: Weighted B-Frames: Y:18.1% UV:17.6% x265 [info]: consecutive B-frames: 4.7% 3.3% 11.0% 20.1% 16.9% 12.9% 10.2% 9.7% 11.2% encoded 10162 frames in 104535.21s (0.10 fps), 2416.02 kb/s, Avg QP:35.76 [aac @ 0x5584186c0220] Qavg: 156.304 Und die Ausgabe des übertriebenen Laufs:
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '<input.mp4>': Metadata: major_brand : mp42 minor_version : 0 compatible_brands: mp42mp41 creation_time : 2018-03-25T07:58:52.000000Z Duration: 00:07:03.46, start: 0.000000, bitrate: 207200 kb/s Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 207062 kb/s, 24 fps, 24 tbr, 24k tbn, 48 tbc (default) Metadata: creation_time : 2018-03-25T07:58:52.000000Z handler_name : ?Mainconcept Video Media Handler encoder : AVC Coding Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 157 kb/s (default) Metadata: creation_time : 2018-03-25T07:58:52.000000Z handler_name : #Mainconcept MP4 Sound Media Handler Stream mapping: Stream #0:0 -> #0:0 (h264 (native) -> hevc (libx265)) Stream #0:1 -> #0:1 (aac (native) -> aac (native)) Press [q] to stop, [?] for help x265 [info]: HEVC encoder version 2.6 x265 [info]: build info [Linux][GCC 7.2.0][64 bit] 8bit+10bit+12bit x265 [info]: using cpu capabilities: MMX2 SSE2Fast LZCNT SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 x265 [info]: Main profile, Level-4 (Main tier) x265 [info]: Slices : 1 x265 [info]: frame threads / pool features : 1 / none x265 [info]: Coding QT: max CU size, min CU size : 64 / 8 x265 [info]: Residual QT: max TU size, max depth : 32 / 4 inter / 4 intra x265 [info]: ME / range / subpel / merge : full / 32767 / 7 / 5 x265 [info]: Keyframe min / max / scenecut / bias: 2 / 15000 / 40 / 5.00 x265 [info]: Lookahead / bframes / badapt : 250 / 16 / 2 x265 [info]: b-pyramid / weightp / weightb : 1 / 1 / 1 x265 [info]: References / ref-limit cu / depth : 6 / off / off x265 [info]: AQ: mode / str / qg-size / cu-tree : 3 / 1.0 / 8 / 1 x265 [info]: Rate Control / qCompress : CRF-30.0 / 0.60 x265 [info]: tools: rd=6 ssim-rd psy-rd=2.00 rdoq=1 psy-rdoq=1.00 rd-refine x265 [info]: tools: cu-lossless signhide tmvp b-intra strong-intra-smoothing x265 [info]: tools: deblock sao Output #0, mp4, to '<output.mp4>': Metadata: major_brand : mp42 minor_version : 0 compatible_brands: mp42mp41 encoder : Lavf57.83.100 Stream #0:0(eng): Video: hevc (libx265) (hev1 / 0x31766568), yuv420p(progressive), 1506x1080 [SAR 1:1 DAR 251:180], q=2-31, 24 fps, 12288 tbn, 24 tbc (default) Metadata: creation_time : 2018-03-25T07:58:52.000000Z handler_name : ?Mainconcept Video Media Handler encoder : Lavc57.107.100 libx265 Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 48 kb/s (default) Metadata: creation_time : 2018-03-25T07:58:52.000000Z handler_name : #Mainconcept MP4 Sound Media Handler encoder : Lavc57.107.100 aac [mp4 @ 0x564f7705a760] Starting second pass: moving the moov atom to the beginning of the file frame=10162 fps=0.1 q=-0.0 Lsize= 293426kB time=00:07:03.43 bitrate=5676.7kbits/s speed=0.00402x video:290747kB audio:2502kB subtitle:0kB other streams:0kB global headers:2kB muxing overhead: 0.060220% x265 [info]: frame I: 34, Avg QP:28.44 kb/s: 8462.33 x265 [info]: frame P: 1710, Avg QP:31.95 kb/s: 6614.87 x265 [info]: frame B: 8418, Avg QP:32.51 kb/s: 5411.77 x265 [info]: Weighted P-Frames: Y:7.0% UV:6.8% x265 [info]: Weighted B-Frames: Y:18.4% UV:17.2% x265 [info]: consecutive B-frames: 5.6% 3.6% 11.8% 22.0% 17.3% 11.6% 7.3% 5.3% 2.9% 1.9% 1.5% 2.2% 0.8% 0.9% 0.7% 1.5% 2.9% encoded 10162 frames in 105460.05s (0.10 fps), 5624.43 kb/s, Avg QP:32.40 [aac @ 0x564f770d19e0] Qavg: 156.304 Danke fürs Lesen!