Concretely, the frames are scaled with a high-quality filter and the stream is re-encoded, since resolution is a property of the coded picture; the aspect ratio is preserved unless you deliberately override it. You give it a target width, a target height or a percentage, and it works from the original rather than from a previously resized copy.
Can I keep the aspect ratio, or force exact dimensions?
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Both. Lock the ratio and one dimension follows from the other, which is what you want almost always. Unlock it and you get exactly the numbers you typed, at the cost of stretching — which on video means every face in the frame is slightly too wide. When you need a different shape, crop or letterbox rather than stretch.
Does the source format affect the result of a resize?
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It does. 3GP is the cut-down MP4 profile built for early mobile networks, usually very low resolution with AMR audio. That is what decides whether shrinking the file is purely a question of pixels or also a question of re-encoding.
Is there anything specific to 3GP I should watch for?
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Yes — 3GP files are usually very low resolution with AMR speech audio, so there is little detail left to protect and a lot of size to reclaim. Worth checking before you resize a file you will not be able to regenerate.
What is the most common mistake when resizing 3GP videos?
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Upscaling. Enlarging cannot invent detail that was never captured, so the result is a soft version of the original at a bigger size. Always resize down from the largest source you have, and resize once rather than in stages.
What resolution should I actually target?
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Match where it will be played. 1920x1080 is still the safe default for almost everything; 1280x720 roughly halves the bitrate and is plenty for a screen recording or a talking head; 3840x2160 is only worth keeping if the footage was genuinely shot at it. Vertical platforms want 1080x1920. Never scale up.
Ma ew li ser cîhazên mobîl dixebite
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Belê, veguherkera me bi tevahî bersivkar e û li ser têlefonên jîr û tabletan dixebite. Hûn dikarin pelan li ser iOS, Android û her platformek mobîl a din bi gerokek nûjen veguherînin.
Kîjan gerok têne piştgirî kirin
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Veguherkera me bi hemî gerokên nûjen re dixebite, tevî Chrome, Firefox, Safari, Edge, û Opera. Em pêşniyar dikin ku hûn geroka xwe ji bo ezmûna çêtirîn nûve bikin.
Ma pelên min bi ewlehî û taybet têne parastin?
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Bê guman. Pelên we bi ewlehî têne hilgirtin û piştî veguheztinê bixweber ji serverên me têne jêbirin. Em naveroka pelên we naxwînin, tomar nakin û parve nakin. Hemû veguhastin girêdanên HTTPS-ê yên şîfrekirî bikar tînin.
Ger dakêşana min dest pê neke çi dibe?
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Eger dakêşana we bixweber dest pê neke, dîsa biceribînin ku bişkoja dakêşanê bikirtînin. Piştrast bikin ku pop-up nehatine astengkirin, û peldanka dakêşanê ya geroka xwe kontrol bikin. Her weha hûn dikarin li ser lînka dakêşanê rast-klîk bikin û 'Save As' hilbijêrin.
Ma kalîte dê were parastin
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Kalîteya vîdyoyê di dema pêvajoyê de û di dema veguherînê de bêguher dimîne. Encam bi lihevhatina pelê çavkaniyê û formata hedef ve girêdayî ye.
Ma pêdivî ye ku ez hesabekî çêbikim
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Ji bo karanîna bingehîn hesab ne hewce ye. Hûn dikarin pelan tavilê pêvajo bikin. Çêkirina hesabek belaş gihîştina dîroka veguherîna we û taybetmendiyên din dide we.
